1 | /*
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2 | -----------------------------------------------------------------------------
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3 | This source file is part of the GameTools Project
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4 | http://www.gametools.org
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5 |
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6 | Author: Martin Szydlowski
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7 | -----------------------------------------------------------------------------
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8 | */
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9 |
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10 | #include "OgreKdTree.h"
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11 | #include "OgreKdRenderable.h"
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12 | #include "OgreKdTreeSceneNode.h"
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13 | #include "OgreKdTreeSceneManager.h"
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14 |
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15 | #include <OgreStringConverter.h>
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16 | #include <OgreLogManager.h>
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17 | #include <OgreRoot.h>
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18 | #include <OgreTimer.h>
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19 |
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20 | #include <OgreMaterialManager.h>
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21 |
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22 | #define PLT_SIZE 101
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23 |
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24 | namespace Ogre
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25 | {
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26 |
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27 | enum BvhIntersection
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28 | {
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29 | OUTSIDE=0,
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30 | INSIDE=1,
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31 | INTERSECT=2
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32 | };
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33 |
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34 | static BvhIntersection intersect( const Ray &one, const AxisAlignedBox &two )
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35 | {
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36 | // Null box?
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37 | if (two.isNull()) return OUTSIDE;
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38 |
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39 | bool inside = true;
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40 | const Vector3* pCorners = two.getAllCorners();
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41 | Vector3 origin = one.getOrigin();
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42 | Vector3 dir = one.getDirection();
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43 |
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44 | Vector3 maxT(-1, -1, -1);
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45 |
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46 | int i = 0;
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47 | for(i=0; i<3; i++ )
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48 | {
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49 | if( origin[i] < pCorners[0][i] )
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50 | {
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51 | inside = false;
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52 | if( dir[i] > 0 )
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53 | {
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54 | maxT[i] = (pCorners[0][i] - origin[i])/ dir[i];
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55 | }
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56 | }
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57 | else if( origin[i] > pCorners[4][i] )
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58 | {
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59 | inside = false;
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60 | if( dir[i] < 0 )
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61 | {
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62 | maxT[i] = (pCorners[4][i] - origin[i]) / dir[i];
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63 | }
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64 | }
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65 | }
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66 |
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67 | if( inside )
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68 | {
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69 | return INTERSECT;
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70 | }
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71 | int whichPlane = 0;
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72 | if( maxT[1] > maxT[whichPlane])
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73 | whichPlane = 1;
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74 | if( maxT[2] > maxT[whichPlane])
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75 | whichPlane = 2;
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76 |
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77 | if( ((int)maxT[whichPlane]) & 0x80000000 )
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78 | {
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79 | return OUTSIDE;
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80 | }
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81 | for(i=0; i<3; i++ )
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82 | {
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83 | if( i!= whichPlane )
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84 | {
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85 | float f = origin[i] + maxT[whichPlane] * dir[i];
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86 | if ( f < (pCorners[0][i] - 0.00001f) ||
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87 | f > (pCorners[4][i] +0.00001f ) )
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88 | {
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89 | return OUTSIDE;
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90 | }
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91 | }
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92 | }
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93 |
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94 | return INTERSECT;
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95 |
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96 | }
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97 |
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98 |
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99 | /** Checks how the second box intersects with the first.
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100 | */
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101 | static BvhIntersection intersect( const PlaneBoundedVolume &one, const AxisAlignedBox &two )
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102 | {
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103 | // Null box?
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104 | if (two.isNull()) return OUTSIDE;
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105 |
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106 | // Get corners of the box
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107 | const Vector3* pCorners = two.getAllCorners();
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108 |
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109 | // For each plane, see if all points are on the negative side
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110 | // If so, object is not visible.
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111 | // If one or more are, it's partial.
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112 | // If all aren't, full
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113 | int corners[ 8 ] = {0, 4, 3, 5, 2, 6, 1, 7};
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114 | bool all_inside = true;
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115 | PlaneList::const_iterator i, iend;
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116 | iend = one.planes.end();
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117 | for (i = one.planes.begin(); i != iend; ++i)
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118 | {
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119 | const Plane& plane = *i;
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120 | bool all_outside = true;
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121 |
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122 | float distance = 0;
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123 |
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124 | for ( int corner = 0; corner < 8; ++corner )
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125 | {
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126 | distance = plane.getDistance( pCorners[ corners[ corner ] ] );
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127 | all_outside = all_outside && ( distance < 0 );
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128 | all_inside = all_inside && ( distance >= 0 );
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129 |
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130 | if ( !all_outside && !all_inside )
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131 | break;
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132 | }
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133 |
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134 | if ( all_outside )
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135 | return OUTSIDE;
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136 | }
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137 |
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138 | if ( all_inside )
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139 | return INSIDE;
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140 | else
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141 | return INTERSECT;
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142 |
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143 | }
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144 |
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145 |
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146 | /** Checks how the second box intersects with the first.
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147 | */
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148 | static BvhIntersection intersect( const AxisAlignedBox &one, const AxisAlignedBox &two )
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149 | {
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150 | // Null box?
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151 | if (one.isNull() || two.isNull()) return OUTSIDE;
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152 |
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153 | const Vector3 * outside = one.getAllCorners();
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154 | const Vector3 *inside = two.getAllCorners();
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155 |
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156 | if ( inside[ 4 ].x < outside[ 0 ].x ||
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157 | inside[ 4 ].y < outside[ 0 ].y ||
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158 | inside[ 4 ].z < outside[ 0 ].z ||
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159 | inside[ 0 ].x > outside[ 4 ].x ||
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160 | inside[ 0 ].y > outside[ 4 ].y ||
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161 | inside[ 0 ].z > outside[ 4 ].z )
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162 | {
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163 | return OUTSIDE;
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164 | }
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165 |
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166 | bool full = ( inside[ 0 ].x > outside[ 0 ].x &&
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167 | inside[ 0 ].y > outside[ 0 ].y &&
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168 | inside[ 0 ].z > outside[ 0 ].z &&
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169 | inside[ 4 ].x < outside[ 4 ].x &&
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170 | inside[ 4 ].y < outside[ 4 ].y &&
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171 | inside[ 4 ].z < outside[ 4 ].z );
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172 |
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173 | if ( full )
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174 | return INSIDE;
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175 | else
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176 | return INTERSECT;
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177 |
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178 | }
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179 |
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180 | /** Checks how the box intersects with the sphere.
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181 | */
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182 | static BvhIntersection intersect( const Sphere &one, const AxisAlignedBox &two )
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183 | {
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184 | // Null box?
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185 | if (two.isNull()) return OUTSIDE;
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186 |
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187 | float sradius = one.getRadius();
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188 |
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189 | sradius *= sradius;
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190 |
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191 | Vector3 scenter = one.getCenter();
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192 |
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193 | const Vector3 *corners = two.getAllCorners();
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194 |
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195 | float s, d = 0;
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196 |
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197 | Vector3 mndistance = ( corners[ 0 ] - scenter );
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198 | Vector3 mxdistance = ( corners[ 4 ] - scenter );
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199 |
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200 | if ( mndistance.squaredLength() < sradius &&
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201 | mxdistance.squaredLength() < sradius )
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202 | {
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203 | return INSIDE;
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204 | }
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205 |
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206 | //find the square of the distance
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207 | //from the sphere to the box
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208 | for ( int i = 0 ; i < 3 ; i++ )
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209 | {
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210 | if ( scenter[ i ] < corners[ 0 ][ i ] )
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211 | {
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212 | s = scenter[ i ] - corners[ 0 ][ i ];
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213 | d += s * s;
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214 | }
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215 |
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216 | else if ( scenter[ i ] > corners[ 4 ][ i ] )
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217 | {
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218 | s = scenter[ i ] - corners[ 4 ][ i ];
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219 | d += s * s;
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220 | }
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221 |
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222 | }
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223 |
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224 | bool partial = ( d <= sradius );
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225 |
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226 | if ( !partial )
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227 | {
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228 | return OUTSIDE;
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229 | }
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230 |
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231 | else
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232 | {
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233 | return INTERSECT;
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234 | }
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235 | }
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236 |
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237 | Real PlaneEvent::KT = 2.0;
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238 | Real PlaneEvent::KI = 1.0;
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239 |
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240 | //----------------------------------------------------------------------------
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241 | // determine if this event is left or right of the reference event
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242 | void PlaneEvent::classify(const PlaneEvent& e, PlaneEvent::Side side)
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243 | {
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244 | // only classify events of the same dimension
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245 | if (mDimension == e.mDimension)
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246 | {
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247 | if (mType == PET_END && mPosition[mDimension] <= e.mPosition[e.mDimension])
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248 | {
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249 | mRenderable->setSide(PES_LEFT);
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250 | }
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251 | else if (mType == PET_START && mPosition[mDimension] >= e.mPosition[e.mDimension])
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252 | {
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253 | mRenderable->setSide(PES_RIGHT);
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254 | }
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255 | else if (mType == PET_ON)
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256 | {
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257 | if (mPosition[mDimension] < e.mPosition[e.mDimension] ||
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258 | (mPosition[mDimension] == e.mPosition[e.mDimension] && side == PES_LEFT))
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259 | {
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260 | mRenderable->setSide(PES_LEFT);
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261 | }
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262 | if (mPosition[mDimension] > e.mPosition[e.mDimension] ||
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263 | (mPosition[mDimension] == e.mPosition[e.mDimension] && side == PES_RIGHT))
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264 | {
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265 | mRenderable->setSide(PES_RIGHT);
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266 | }
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267 | }
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268 | }
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269 | }
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270 |
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271 | //----------------------------------------------------------------------------
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272 | // clip this event to an aabb (move it so that the plane on one of the box planes)
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273 | PlaneEvent PlaneEvent::clip(AxisAlignedBox& box, PlaneEvent::Dimension dim)
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274 | {
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275 | Vector3 newpos = mPosition, min = box.getMinimum(), max = box.getMaximum();
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276 | if (newpos[dim] < min[dim])
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277 | newpos[dim] = min[dim];
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278 | else if (newpos[dim] > max[dim])
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279 | newpos[dim] = max[dim];
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280 |
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281 | return PlaneEvent(mRenderable, newpos, mDimension, mType);
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282 | }
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283 |
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284 | //----------------------------------------------------------------------------
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285 | // the surface area heuristic to determine the cost of splitting the parent aabb
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286 | // along the plane represented by this event
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287 | void PlaneEvent::SAH(const AxisAlignedBox& parent, int nLeft, int nPlane, int nRight, SplitInfo& split)
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288 | {
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289 | Real mu = splitBox(parent, split.bleft, split.bright);
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290 | Real sav = surfaceArea(parent);
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291 | Real pl = surfaceArea(split.bleft) / sav;
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292 | Real pr = surfaceArea(split.bright) / sav;
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293 | Real costl = splitCost(pl, pr, nLeft + nPlane, nRight, mu);
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294 | Real costr = splitCost(pl, pr, nLeft, nPlane + nRight, mu);
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295 |
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296 | if (costl < costr)
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297 | {
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298 | split.cost = costl;
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299 | split.side = PES_LEFT;
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300 | split.nleft = nLeft + nPlane;
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301 | split.nright = nRight;
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302 | }
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303 | else
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304 | {
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305 | split.cost = costr;
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306 | split.side = PES_RIGHT;
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307 | split.nleft = nLeft;
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308 | split.nright = nPlane + nRight;
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309 |
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310 | }
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311 | split.event = *this;
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312 | }
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313 |
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314 | //----------------------------------------------------------------------------
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315 | // split the parent aabb with the plane in this event
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316 | Real PlaneEvent::splitBox(const AxisAlignedBox& parent, AxisAlignedBox& left, AxisAlignedBox& right)
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317 | {
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318 | Vector3 bmin = parent.getMinimum();
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319 | Vector3 bmax = parent.getMaximum();
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320 | // calculate the penalty for spliting the box that way
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321 | Real mu = lookupPenalty(
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322 | (mPosition[mDimension] - bmin[mDimension]) /
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323 | (bmax[mDimension] - bmin[mDimension]));
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324 | // set corners which are the same as parent AABB
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325 | left.setMinimum(bmin);
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326 | right.setMaximum(bmax);
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327 | // modify "inner" corners
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328 | bmin[mDimension] = mPosition[mDimension];
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329 | bmax[mDimension] = mPosition[mDimension];
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330 | // set the corners on the split plane
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331 | left.setMaximum(bmax);
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332 | right.setMinimum(bmin);
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333 |
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334 | return mu;
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335 | }
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336 |
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337 | //----------------------------------------------------------------------------
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338 | // compute surface area of a box ... DUH!
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339 | Real PlaneEvent::surfaceArea(const AxisAlignedBox& box)
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340 | {
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341 | Vector3 sides = box.getMaximum() - box.getMinimum();
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342 | return 2 * sides.x * sides.y +
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343 | 2 * sides.y * sides.z +
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344 | 2 * sides.z * sides.x;
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345 | }
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346 |
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347 | //----------------------------------------------------------------------------
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348 | // lookup the penalty for placing the splitting plane near to the edge of the AABB
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349 | // 0.0 <= p <= 1.0, p = 0.5 means the plane divides the aabb in half
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350 | Real PlaneEvent::lookupPenalty(Real p)
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351 | {
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352 | // precomputed table of {x^6 + 1|0 <= x <= 1}
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353 | static Real mPenaltyLookupTable[PLT_SIZE];
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354 | static bool init_done = false;
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355 |
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356 | if (!init_done)
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357 | {
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358 | Real step = 1.0 / (PLT_SIZE - 1);
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359 | Real x = 0.0;
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360 | //LogManager::getSingleton().logMessage("### Calculating Lookup Table ###");
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361 | for (int i = 0; i < PLT_SIZE; i++)
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362 | {
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363 | mPenaltyLookupTable[i] = Math::Pow(x, 6) + 1.0;
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364 | x += step;
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365 | //LogManager::getSingleton().logMessage("### mPenaltyLookupTable[" + StringConverter::toString(i,3) + "]=" + StringConverter::toString(mPenaltyLookupTable[i]));
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366 | }
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367 | init_done = true;
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368 | //LogManager::getSingleton().logMessage("### Lookup Table Calculated ###");
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369 | }
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370 |
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371 | // normalize p to [0,1]
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372 | Real x = Math::Abs(p * 2 - 1);
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373 | // compute index
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374 | int i = Math::IFloor(x * (PLT_SIZE - 1));
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375 |
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376 | return mPenaltyLookupTable[i];
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377 | }
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378 |
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379 | //----------------------------------------------------------------------------
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380 | // compute cost of the split, reward splitting of empty space (lambda, const),
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381 | // penalize splitting off 'thin' slices (mu, const)
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382 | Real PlaneEvent::splitCost(Real pLeft, Real pRight, int nLeft, int nRight)
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383 | {
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384 | // reward splitting off chunks of empty space
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385 | Real lambda = 1.0;
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386 | if (nLeft == 0 || nRight == 0)
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387 | {
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388 | lambda = 0.8;
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389 | }
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390 |
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391 | // penalize splitting off small chunks (thin slices)
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392 | Real mu = 1.0;
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393 | if (pLeft < 0.1 || pRight < 0.1 || pLeft > 0.9 || pRight > 0.9)
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394 | {
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395 | mu = 1.5;
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396 | }
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397 | return lambda * mu * (KT + (KI * (pLeft*nLeft + pRight*nRight)));
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398 | }
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399 |
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400 | //----------------------------------------------------------------------------
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401 | // compute cost of the split, reward splitting of empty space (lambda, const),
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402 | // penalize splitting off 'thin' slices (mu, parameter)
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403 | Real PlaneEvent::splitCost(Real pLeft, Real pRight, int nLeft, int nRight, Real mu)
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404 | {
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405 | // reward splitting off chunks of empty space
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406 | Real lambda = 1.0;
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407 | if (nLeft == 0 || nRight == 0)
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408 | {
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409 | lambda = 0.8;
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410 | }
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411 |
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412 | return lambda * mu * (KT + (KI * (pLeft*nLeft + pRight*nRight)));
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413 | }
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414 |
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415 | //----------------------------------------------------------------------------
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416 | // surface area heuristic modified for the priority queue method of building
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417 | // the probabilities (p, pl, pr) are relative to the global (all enclosing) aabb
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418 | void PlaneEvent::pqSAH(Real globalSA, Real parentSA, int nLeft, int nPlane, int nRight,
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419 | AxisAlignedBox& parentBox, SplitInfo& split)
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420 | {
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421 | Real mu = splitBox(parentBox, split.bleft, split.bright);
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422 | Real p = parentSA / globalSA;
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423 | Real pl = surfaceArea(split.bleft) / globalSA;
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424 | Real pr = surfaceArea(split.bright) / globalSA;
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425 | Real costl = pqSplitCost(p, pl, pr, nLeft + nPlane, nRight, mu);
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426 | Real costr = pqSplitCost(p, pl, pr, nLeft, nPlane + nRight, mu);
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427 |
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428 | if (costl < costr)
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429 | {
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430 | split.cost = costl;
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431 | split.side = PES_LEFT;
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432 | split.nleft = nLeft + nPlane;
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433 | split.nright = nRight;
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434 | }
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435 | else
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436 | {
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437 | split.cost = costr;
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438 | split.side = PES_RIGHT;
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439 | split.nleft = nLeft;
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440 | split.nright = nPlane + nRight;
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441 |
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442 | }
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443 | split.event = *this;
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444 | }
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445 |
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446 | //----------------------------------------------------------------------------
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447 | // compute split cost without any penalties
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448 | Real PlaneEvent::pqSplitCost(Real pParent, Real pLeft, Real pRight, int nLeft, int nRight, Real mu)
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449 | {
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450 | return pParent * KT + (KI * (pLeft * nLeft + pRight * nRight));
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451 | }
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452 |
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453 | //----------------------------------------------------------------------------
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454 | // DEBUG
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455 | String PlaneEvent::print()
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456 | {
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457 | String dim, type;
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458 | if (mDimension == PED_X)
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459 | dim = "X";
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460 | if (mDimension == PED_Y)
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461 | dim = "Y";
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462 | if (mDimension == PED_Z)
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463 | dim = "Z";
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464 | if (mType == PET_END)
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465 | type = "END ";
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466 | if (mType == PET_ON)
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467 | type = "ON ";
|
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468 | if (mType == PET_START)
|
---|
469 | type = "START";
|
---|
470 | //return StringConverter::toString(mPosition[mDimension]) + " " + dim + " " + type;
|
---|
471 | return type + " " + dim + " " + StringConverter::toString(mPosition[mDimension]);
|
---|
472 | };
|
---|
473 |
|
---|
474 | //----------------------------------------------------------------------------
|
---|
475 | String SplitInfo::print()
|
---|
476 | {
|
---|
477 | String sside;
|
---|
478 | if (side == PlaneEvent::PES_BOTH)
|
---|
479 | sside = "BOTH ";
|
---|
480 | if (side == PlaneEvent::PES_LEFT)
|
---|
481 | sside = "LEFT ";
|
---|
482 | if (side == PlaneEvent::PES_RIGHT)
|
---|
483 | sside = "RIGHT";
|
---|
484 | return "nLeft: " + StringConverter::toString(nleft, 4) + " nRight: " +
|
---|
485 | StringConverter::toString(nright, 4) + " Cost: " + StringConverter::toString(cost, 8, 9) +
|
---|
486 | " Side: " + sside + " Event: " + event.print() + " Leftbox: " +
|
---|
487 | StringConverter::toString(bleft.getMinimum()) + ", " +
|
---|
488 | StringConverter::toString(bleft.getMaximum()) + " Rightbox: " +
|
---|
489 | StringConverter::toString(bright.getMinimum()) + ", " +
|
---|
490 | StringConverter::toString(bright.getMaximum());
|
---|
491 | };
|
---|
492 |
|
---|
493 | //----------------------------------------------------------------------------
|
---|
494 | String KdTree::SplitCandidate::print()
|
---|
495 | {
|
---|
496 | String sside;
|
---|
497 | if (side == PlaneEvent::PES_BOTH)
|
---|
498 | sside = "BOTH ";
|
---|
499 | if (side == PlaneEvent::PES_LEFT)
|
---|
500 | sside = "LEFT ";
|
---|
501 | if (side == PlaneEvent::PES_RIGHT)
|
---|
502 | sside = "RIGHT";
|
---|
503 | return "List: " + StringConverter::toString(events->size(), 4) + " Objects: " +
|
---|
504 | StringConverter::toString(nObjects, 4) + " Cost: " + StringConverter::toString(cost, 8, 9) +
|
---|
505 | " Decrease: " + StringConverter::toString(decrease, 8, 9) + " Side: " + sside + " Best: " +
|
---|
506 | best->print() + " Box: " + StringConverter::toString(aabb.getMinimum()) + ", "
|
---|
507 | + StringConverter::toString(aabb.getMaximum());
|
---|
508 |
|
---|
509 | };
|
---|
510 |
|
---|
511 | //----------------------------------------------------------------------------
|
---|
512 | //----------------------------------------------------------------------------
|
---|
513 | //----------------------------------------------------------------------------
|
---|
514 |
|
---|
515 | KdTree::KdTree(int maxdepth, BuildMethod bm):
|
---|
516 | mMaxDepth(maxdepth),
|
---|
517 | mBuildMethod(bm),
|
---|
518 | mHiLiteLevel(0),
|
---|
519 | mShowAllBoxes(false),
|
---|
520 | mShowNodes(true),
|
---|
521 | mKdRoot(0),
|
---|
522 | mBuildLog(0)
|
---|
523 | {
|
---|
524 | init();
|
---|
525 | }
|
---|
526 |
|
---|
527 | KdTree::KdTree(int maxdepth, BuildMethod bm, int hilite, bool allboxes, bool shownodes):
|
---|
528 | mMaxDepth(maxdepth),
|
---|
529 | mBuildMethod(bm),
|
---|
530 | mHiLiteLevel(hilite),
|
---|
531 | mShowAllBoxes(allboxes),
|
---|
532 | mShowNodes(shownodes),
|
---|
533 | mKdRoot(0),
|
---|
534 | mBuildLog(0)
|
---|
535 | {
|
---|
536 | init();
|
---|
537 | }
|
---|
538 |
|
---|
539 | KdTree::~KdTree()
|
---|
540 | {
|
---|
541 | delete mKdRoot;
|
---|
542 | }
|
---|
543 |
|
---|
544 | void KdTree::init()
|
---|
545 | {
|
---|
546 | MaterialPtr mat;
|
---|
547 | TextureUnitState *tex;
|
---|
548 |
|
---|
549 | // init visualization materials (unlit solid green/yellow)
|
---|
550 | mat = MaterialManager::getSingleton().getByName("KdTree/BoxHiLite");
|
---|
551 | if (mat.isNull())
|
---|
552 | {
|
---|
553 | ColourValue green(0, 1, 0);
|
---|
554 | mat = MaterialManager::getSingleton().create("KdTree/BoxHiLite", "General");
|
---|
555 | //mat->setAmbient(green);
|
---|
556 | //mat->setDiffuse(green);
|
---|
557 | mat->setLightingEnabled(false);
|
---|
558 | tex = mat->getTechnique(0)->getPass(0)->createTextureUnitState();
|
---|
559 | tex->setColourOperationEx(LBX_SOURCE2, LBS_CURRENT, LBS_MANUAL, green, green);
|
---|
560 | }
|
---|
561 |
|
---|
562 | mat = MaterialManager::getSingleton().getByName("KdTree/BoxViz");
|
---|
563 | if (mat.isNull())
|
---|
564 | {
|
---|
565 | ColourValue yellow(1, 1, 0);
|
---|
566 | mat = MaterialManager::getSingleton().create("KdTree/BoxViz", "General");
|
---|
567 | //mat->setAmbient(yellow);
|
---|
568 | //mat->setDiffuse(yellow);
|
---|
569 | mat->setLightingEnabled(false);
|
---|
570 | tex = mat->getTechnique(0)->getPass(0)->createTextureUnitState();
|
---|
571 | tex->setColourOperationEx(LBX_SOURCE2, LBS_CURRENT, LBS_MANUAL, yellow, yellow);
|
---|
572 | }
|
---|
573 |
|
---|
574 | // retrieve or create build log
|
---|
575 | try
|
---|
576 | {
|
---|
577 | mBuildLog = LogManager::getSingleton().getLog(KDTREE_LOGNAME);
|
---|
578 | }
|
---|
579 | catch (Exception&)
|
---|
580 | {
|
---|
581 | mBuildLog = LogManager::getSingleton().createLog(KDTREE_LOGNAME);
|
---|
582 | }
|
---|
583 |
|
---|
584 | setEnhancedVis(false);
|
---|
585 | }
|
---|
586 |
|
---|
587 | /************************************************************************/
|
---|
588 | /* KdTree insert/delete functions */
|
---|
589 | /************************************************************************/
|
---|
590 |
|
---|
591 | void KdTree::remove(KdRenderable * rend)
|
---|
592 | {
|
---|
593 | // DEBUG
|
---|
594 | //LogManager::getSingleton().logMessage("-- Removing SceneNode: " + (static_cast<KdTreeSceneNode *>(rend))->getName());
|
---|
595 | std::queue<LeafPtr> cleanup;
|
---|
596 | LeafPtr leaf;
|
---|
597 | LeafSet ls = rend->getLeaves();
|
---|
598 | LeafSet::iterator it = ls.begin();
|
---|
599 | LeafSet::iterator end = ls.end();
|
---|
600 | while (it != end)
|
---|
601 | {
|
---|
602 | cleanup.push(*it);
|
---|
603 | it++;
|
---|
604 | }
|
---|
605 | while (!cleanup.empty())
|
---|
606 | {
|
---|
607 | leaf = cleanup.front();
|
---|
608 | cleanup.pop();
|
---|
609 | leaf->remove(rend);
|
---|
610 | bool gone = rend->detachFrom(leaf);
|
---|
611 | assert(gone && "Failed to detach leave which is abso-fuckin-lutely impossible!!!");
|
---|
612 | //dump();
|
---|
613 | recDelete(leaf);
|
---|
614 | //dump();
|
---|
615 | }
|
---|
616 | }
|
---|
617 |
|
---|
618 | void KdTree::recDelete(KdTree::Node * node)
|
---|
619 | {
|
---|
620 | if (node == 0) // DEBUG
|
---|
621 | {
|
---|
622 | OGRE_EXCEPT(Exception::ERR_INTERNAL_ERROR,
|
---|
623 | "SNAFU while inserting KdRenderable into KdTree.",
|
---|
624 | "KdTree::recInsert" );
|
---|
625 | return;
|
---|
626 | }
|
---|
627 |
|
---|
628 | if (node->isEmpty())
|
---|
629 | {
|
---|
630 | if (node == mKdRoot)
|
---|
631 | {
|
---|
632 | OGRE_DELETE(mKdRoot);
|
---|
633 | }
|
---|
634 | else
|
---|
635 | {
|
---|
636 | KdTree::Branch * parent = KDBRANCHPTR_CAST(node->getParent());
|
---|
637 | if (node == parent->mLeft)
|
---|
638 | {
|
---|
639 | OGRE_DELETE(parent->mLeft);
|
---|
640 | }
|
---|
641 | else if (node == parent->mRight)
|
---|
642 | {
|
---|
643 | OGRE_DELETE(parent->mRight);
|
---|
644 | }
|
---|
645 | recDelete(parent);
|
---|
646 | }
|
---|
647 | }
|
---|
648 | }
|
---|
649 |
|
---|
650 | void KdTree::insert(KdRenderable * rend)
|
---|
651 | {
|
---|
652 | // make sure the tree exists
|
---|
653 | if (mKdRoot)
|
---|
654 | {
|
---|
655 | // make sure the renderable is inside the world bounding box
|
---|
656 | AxisAlignedBox aabb = rend->getBoundingBox();
|
---|
657 | AxisAlignedBox isect = mKdRoot->mAABB.intersection(aabb);
|
---|
658 | if (isect.getMinimum() == aabb.getMinimum() && isect.getMaximum() == aabb.getMaximum())
|
---|
659 | {
|
---|
660 | recInsert(mKdRoot, rend);
|
---|
661 | }
|
---|
662 | else
|
---|
663 | {
|
---|
664 | //LogManager::getSingleton().logMessage("Inserted node outside of world AABB.");
|
---|
665 | KdRenderableList nodelist;
|
---|
666 | nodelist.push_back(rend);
|
---|
667 | addRendToList(mKdRoot, nodelist);
|
---|
668 | OGRE_DELETE(mKdRoot);
|
---|
669 | mKdRoot = buildFromList(nodelist, 0, AxisAlignedBox());
|
---|
670 | }
|
---|
671 | }
|
---|
672 | // otherwise build a new one
|
---|
673 | else
|
---|
674 | {
|
---|
675 | build(rend);
|
---|
676 | }
|
---|
677 | }
|
---|
678 |
|
---|
679 | void KdTree::recInsert(KdTree::Node * node, KdRenderable * rend)
|
---|
680 | {
|
---|
681 | if (node == 0) // DEBUG
|
---|
682 | {
|
---|
683 | OGRE_EXCEPT(Exception::ERR_INTERNAL_ERROR,
|
---|
684 | "SNAFU while inserting KdRenderable into KdTree.",
|
---|
685 | "KdTree::recInsert" );
|
---|
686 | return;
|
---|
687 | }
|
---|
688 |
|
---|
689 | // rebuild the leaf/replace with subtree ...
|
---|
690 | if (node->isLeaf())
|
---|
691 | {
|
---|
692 | //LogManager::getSingleton().logMessage("## Replacing leaf.");
|
---|
693 | rebuildSubtree(node, rend);
|
---|
694 | }
|
---|
695 | else
|
---|
696 | {
|
---|
697 | KdTree::Branch * branch = KDBRANCHPTR_CAST(node);
|
---|
698 | AxisAlignedBox aabb = rend->getBoundingBox();
|
---|
699 | Plane::Side smin = branch->mSplitPlane->getSide(aabb.getMinimum());
|
---|
700 | Plane::Side smax = branch->mSplitPlane->getSide(aabb.getMaximum());
|
---|
701 | if (smin == smax)
|
---|
702 | {
|
---|
703 | if (smax == Plane::NEGATIVE_SIDE ||
|
---|
704 | (smax == Plane::NO_SIDE && branch->mPlaneSide == PlaneEvent::PES_LEFT))
|
---|
705 | {
|
---|
706 | if (branch->mLeft)
|
---|
707 | recInsert(branch->mLeft, rend);
|
---|
708 | else
|
---|
709 | recInsertNew(branch, PlaneEvent::PES_LEFT, rend);
|
---|
710 | }
|
---|
711 | else if (smin == Plane::POSITIVE_SIDE ||
|
---|
712 | (smin == Plane::NO_SIDE && branch->mPlaneSide == PlaneEvent::PES_RIGHT))
|
---|
713 | {
|
---|
714 | if (branch->mRight)
|
---|
715 | recInsert(branch->mRight, rend);
|
---|
716 | else
|
---|
717 | recInsertNew(branch, PlaneEvent::PES_RIGHT, rend);
|
---|
718 | }
|
---|
719 | }
|
---|
720 | else
|
---|
721 | {
|
---|
722 | if (smin == Plane::NEGATIVE_SIDE && smax == Plane::NO_SIDE)
|
---|
723 | {
|
---|
724 | if (branch->mLeft)
|
---|
725 | recInsert(branch->mLeft, rend);
|
---|
726 | else
|
---|
727 | recInsertNew(branch, PlaneEvent::PES_LEFT, rend);
|
---|
728 | }
|
---|
729 | else if (smax == Plane::POSITIVE_SIDE && smin == Plane::NO_SIDE)
|
---|
730 | {
|
---|
731 | if (branch->mRight)
|
---|
732 | recInsert(branch->mRight, rend);
|
---|
733 | else
|
---|
734 | recInsertNew(branch, PlaneEvent::PES_RIGHT, rend);
|
---|
735 | }
|
---|
736 | else
|
---|
737 | {
|
---|
738 | // to avoid SNAFUs, rebuild whole subtree
|
---|
739 | //LogManager::getSingleton().logMessage("## Rebuilding subtree for insertion");
|
---|
740 | rebuildSubtree(node, rend);
|
---|
741 | }
|
---|
742 | }
|
---|
743 | }
|
---|
744 | }
|
---|
745 |
|
---|
746 | void KdTree::recInsertNew(KdTree::Branch * parent, PlaneEvent::Side side, KdRenderable * rend)
|
---|
747 | {
|
---|
748 | //LogManager::getSingleton().logMessage("## Inserting into new subtree");
|
---|
749 |
|
---|
750 | AxisAlignedBox left, rigth, aabb;
|
---|
751 | PlaneEventList events;
|
---|
752 | int nObjects;
|
---|
753 |
|
---|
754 | rend->computeScene(events, aabb, nObjects, false);
|
---|
755 |
|
---|
756 | // override aabb
|
---|
757 | splitBox(*parent, left, rigth);
|
---|
758 | if (side == PlaneEvent::PES_LEFT)
|
---|
759 | {
|
---|
760 | aabb = left;
|
---|
761 | if (mBuildMethod == KDBM_RECURSIVE)
|
---|
762 | parent->mLeft = recBuild(events, nObjects, aabb, parent);
|
---|
763 | else if (mBuildMethod == KDBM_PRIORITYQUEUE)
|
---|
764 | parent->mLeft = pqBuild(events, nObjects, aabb, parent);
|
---|
765 | else
|
---|
766 | {
|
---|
767 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS,
|
---|
768 | "Invalid build method for the KdTree.",
|
---|
769 | "KdTree::buildFromList");
|
---|
770 | parent->mLeft = 0;
|
---|
771 | }
|
---|
772 |
|
---|
773 | }
|
---|
774 | else if (side == PlaneEvent::PES_RIGHT)
|
---|
775 | {
|
---|
776 | aabb = rigth;
|
---|
777 | if (mBuildMethod == KDBM_RECURSIVE)
|
---|
778 | parent->mRight = recBuild(events, nObjects, aabb, parent);
|
---|
779 | else if (mBuildMethod == KDBM_PRIORITYQUEUE)
|
---|
780 | parent->mRight = pqBuild(events, nObjects, aabb, parent);
|
---|
781 | else
|
---|
782 | {
|
---|
783 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS,
|
---|
784 | "Invalid build method for the KdTree.",
|
---|
785 | "KdTree::buildFromList");
|
---|
786 | parent->mRight = 0;
|
---|
787 | }
|
---|
788 | }
|
---|
789 | }
|
---|
790 |
|
---|
791 | void KdTree::rebuildSubtree(KdTree::Node * node, KdRenderable * rend)
|
---|
792 | {
|
---|
793 | //LogManager::getSingleton().logMessage("## Rebuilding subtree");
|
---|
794 |
|
---|
795 | AxisAlignedBox aabb = node->mAABB;
|
---|
796 |
|
---|
797 | KdRenderableList nodelist;
|
---|
798 | nodelist.push_back(rend);
|
---|
799 | addRendToList(node, nodelist);
|
---|
800 |
|
---|
801 | if (node == mKdRoot)
|
---|
802 | {
|
---|
803 | OGRE_DELETE(mKdRoot);
|
---|
804 | mKdRoot = buildFromList(nodelist, 0, aabb);
|
---|
805 | }
|
---|
806 | else
|
---|
807 | {
|
---|
808 | KdTree::Branch * parent = KDBRANCHPTR_CAST(node->getParent());
|
---|
809 |
|
---|
810 | if (node == parent->mLeft)
|
---|
811 | {
|
---|
812 | OGRE_DELETE(parent->mLeft);
|
---|
813 | parent->mLeft = buildFromList(nodelist, parent, aabb);
|
---|
814 | }
|
---|
815 | else if (node == parent->mRight)
|
---|
816 | {
|
---|
817 | OGRE_DELETE(parent->mRight);
|
---|
818 | parent->mRight = buildFromList(nodelist, parent, aabb);
|
---|
819 | }
|
---|
820 | else
|
---|
821 | {
|
---|
822 | OGRE_EXCEPT(Exception::ERR_INTERNAL_ERROR,
|
---|
823 | "SNAFU while inserting KdRenderable into KdTree.",
|
---|
824 | "KdTree::recInsert" );
|
---|
825 | }
|
---|
826 | }
|
---|
827 | }
|
---|
828 |
|
---|
829 | // compute both AABB then return the requested one.
|
---|
830 | void KdTree::splitBox(const KdTree::Branch& parent, AxisAlignedBox& left, AxisAlignedBox& right)
|
---|
831 | {
|
---|
832 | Vector3 bmin = parent.mAABB.getMinimum();
|
---|
833 | Vector3 bmax = parent.mAABB.getMaximum();
|
---|
834 | Real pos = - parent.mSplitPlane->d;
|
---|
835 | int dim = static_cast<int>(parent.mSplitPlane->normal.dotProduct(Vector3(0,1,2)));
|
---|
836 | // set corners which are the same as parent AABB
|
---|
837 | left.setMinimum(bmin);
|
---|
838 | right.setMaximum(bmax);
|
---|
839 | // modify "inner" corners
|
---|
840 | bmin[dim] = pos;
|
---|
841 | bmax[dim] = pos;
|
---|
842 | // set the corners on the split plane
|
---|
843 | left.setMaximum(bmax);
|
---|
844 | right.setMinimum(bmin);
|
---|
845 | }
|
---|
846 |
|
---|
847 | void KdTree::addRendToList(KdTree::Node * node, KdRenderableList& nodelist)
|
---|
848 | {
|
---|
849 | if (node->isLeaf())
|
---|
850 | {
|
---|
851 | KdTree::Leaf * leaf = KDLEAFPTR_CAST(node);
|
---|
852 | KdRenderableList::iterator it = leaf->mKdRenderables.begin();
|
---|
853 | KdRenderableList::iterator end = leaf->mKdRenderables.end();
|
---|
854 | while (it != end)
|
---|
855 | {
|
---|
856 | nodelist.push_back(*it);
|
---|
857 | it++;
|
---|
858 | }
|
---|
859 | }
|
---|
860 | else
|
---|
861 | {
|
---|
862 | KdTree::Branch * branch = KDBRANCHPTR_CAST(node);
|
---|
863 | if (branch->mLeft)
|
---|
864 | addRendToList(branch->mLeft, nodelist);
|
---|
865 | if (branch->mRight)
|
---|
866 | addRendToList(branch->mRight, nodelist);
|
---|
867 | }
|
---|
868 | }
|
---|
869 |
|
---|
870 | /************************************************************************/
|
---|
871 | /* KdTree build functions */
|
---|
872 | /************************************************************************/
|
---|
873 |
|
---|
874 | void KdTree::build(KdRenderable * sceneRoot)
|
---|
875 | {
|
---|
876 | Timer *timer = Root::getSingleton().getTimer();
|
---|
877 | unsigned long t1, t2, t3, t4;
|
---|
878 |
|
---|
879 | mTreeStats.clear();
|
---|
880 |
|
---|
881 | // data we want to collect
|
---|
882 | PlaneEventList events;
|
---|
883 | AxisAlignedBox aabb;
|
---|
884 | int nObjects = 0;
|
---|
885 |
|
---|
886 | t1 = timer->getMicroseconds(); // DEBUG
|
---|
887 | sceneRoot->computeScene(events, aabb, nObjects);
|
---|
888 | t2 = timer->getMicroseconds(); // DEBUG
|
---|
889 | events.sort();
|
---|
890 | t3 = timer->getMicroseconds(); // DEBUG
|
---|
891 |
|
---|
892 | mTreeStats.mNumSceneNodes = nObjects;
|
---|
893 |
|
---|
894 | assert(! aabb.isNull() && "Teh stubid worldAABB iz NULL ... waht now?");
|
---|
895 | // hack to avoid SNAFU with "2-dimensional" scene
|
---|
896 | aabb.merge(aabb.getMaximum()+Vector3(1,1,1));
|
---|
897 | aabb.merge(aabb.getMinimum()+Vector3(-1,-1,-1));
|
---|
898 |
|
---|
899 | if (mBuildMethod == KDBM_RECURSIVE)
|
---|
900 | mKdRoot = recBuild(events, nObjects, aabb, 0);
|
---|
901 | else if (mBuildMethod == KDBM_PRIORITYQUEUE)
|
---|
902 | mKdRoot = pqBuild(events, nObjects, aabb, 0);
|
---|
903 | else
|
---|
904 | {
|
---|
905 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS,
|
---|
906 | "Invalid build method for the KdTree.",
|
---|
907 | "KdTree::build");
|
---|
908 | mKdRoot = 0;
|
---|
909 | }
|
---|
910 |
|
---|
911 | t4 = timer->getMicroseconds(); // DEBUG
|
---|
912 |
|
---|
913 | String method = "Invalid";
|
---|
914 | if (mBuildMethod == KDBM_RECURSIVE)
|
---|
915 | method = "Recursive";
|
---|
916 | else if (mBuildMethod == KDBM_PRIORITYQUEUE)
|
---|
917 | method = "Priority Queue";
|
---|
918 |
|
---|
919 | mBuildLog->logMessage("######## SAH Statistics ########");
|
---|
920 | mBuildLog->logMessage("Build Method: " + method);
|
---|
921 | mBuildLog->logMessage("Time for events build: " + StringConverter::toString(t2 - t1) + "µs");
|
---|
922 | mBuildLog->logMessage("Time for events sort: " + StringConverter::toString(t3 - t2) + "µs");
|
---|
923 | mBuildLog->logMessage("Time for tree build: " + StringConverter::toString(t4 - t3) + "µs");
|
---|
924 | mBuildLog->logMessage("Total time: " + StringConverter::toString(t4 - t1) + "µs");
|
---|
925 | mBuildLog->logMessage("Tree Depth: " + StringConverter::toString(mMaxDepth));
|
---|
926 | mBuildLog->logMessage("Number of Objects: " + StringConverter::toString(mTreeStats.mNumSceneNodes));
|
---|
927 | mBuildLog->logMessage("Number of Leaves: " + StringConverter::toString(mTreeStats.mNumLeaves));
|
---|
928 | mBuildLog->logMessage("Number of Nodes: " + StringConverter::toString(mTreeStats.mNumNodes));
|
---|
929 | mBuildLog->logMessage("Total cost: " + StringConverter::toString(calcCost()));
|
---|
930 | mBuildLog->logMessage("################################");
|
---|
931 | }
|
---|
932 |
|
---|
933 | KdTree::Node * KdTree::buildFromList(KdRenderableList& nodelist, KdTree::Branch * parent, AxisAlignedBox& aabb)
|
---|
934 | {
|
---|
935 | // data we want to collect
|
---|
936 | PlaneEventList events;
|
---|
937 | AxisAlignedBox nodeaabb;
|
---|
938 | int nObjects = 0;
|
---|
939 |
|
---|
940 | KdRenderableList::iterator it = nodelist.begin();
|
---|
941 | KdRenderableList::iterator end = nodelist.end();
|
---|
942 | while (it != end)
|
---|
943 | {
|
---|
944 | (*it)->computeScene(events, nodeaabb, nObjects, false);
|
---|
945 | it++;
|
---|
946 | }
|
---|
947 |
|
---|
948 | events.sort();
|
---|
949 |
|
---|
950 | // HACK
|
---|
951 | if (aabb.isNull())
|
---|
952 | {
|
---|
953 | aabb = nodeaabb;
|
---|
954 | }
|
---|
955 |
|
---|
956 | if (mBuildMethod == KDBM_RECURSIVE)
|
---|
957 | return recBuild(events, nObjects, aabb, parent);
|
---|
958 | else if (mBuildMethod == KDBM_PRIORITYQUEUE)
|
---|
959 | return pqBuild(events, nObjects, aabb, parent);
|
---|
960 | else
|
---|
961 | {
|
---|
962 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS,
|
---|
963 | "Invalid build method for the KdTree.",
|
---|
964 | "KdTree::buildFromList");
|
---|
965 | return 0;
|
---|
966 | }
|
---|
967 | }
|
---|
968 |
|
---|
969 | KdTree::Node * KdTree::recBuild(PlaneEventList& events, int nObjects, AxisAlignedBox& aabb, KdTree::Branch * parent)
|
---|
970 | {
|
---|
971 | // determine the depth we are on
|
---|
972 | int level = 0;
|
---|
973 | if (parent)
|
---|
974 | {
|
---|
975 | level = parent->getLevel() + 1;
|
---|
976 | }
|
---|
977 |
|
---|
978 | /************************************************/
|
---|
979 | /**************** BEGIN FINDPLANE ***************/
|
---|
980 | /************************************************/
|
---|
981 | // find optimal split plane and split node accordingly
|
---|
982 |
|
---|
983 | // initialize
|
---|
984 | const int dim = 3;
|
---|
985 | int pStart, pOn, pEnd;
|
---|
986 | int nLeft[dim], nPlane[dim], nRight[dim];
|
---|
987 | for (int i = 0; i < dim; i++)
|
---|
988 | {
|
---|
989 | nLeft[i] = 0; nPlane[i] = 0; nRight[i] = nObjects;
|
---|
990 | }
|
---|
991 |
|
---|
992 | SplitInfo split, best;
|
---|
993 | best.cost = Math::POS_INFINITY;
|
---|
994 |
|
---|
995 | PlaneEventList::iterator begin = events.begin();
|
---|
996 | PlaneEventList::iterator end = events.end();
|
---|
997 | PlaneEventList::iterator it = begin;
|
---|
998 | // try all planes to find the best one for the given set of objects
|
---|
999 | while (it != end)
|
---|
1000 | {
|
---|
1001 | PlaneEventList::iterator p = it;
|
---|
1002 | pStart = pOn = pEnd = 0;
|
---|
1003 | while (it != end && p->equalsType(*it, PlaneEvent::PET_END))
|
---|
1004 | {
|
---|
1005 | it++; pEnd++;
|
---|
1006 | }
|
---|
1007 | while (it != end && p->equalsType(*it, PlaneEvent::PET_ON))
|
---|
1008 | {
|
---|
1009 | it++; pOn++;
|
---|
1010 | }
|
---|
1011 | while (it != end && p->equalsType(*it, PlaneEvent::PET_START))
|
---|
1012 | {
|
---|
1013 | it++; pStart++;
|
---|
1014 | }
|
---|
1015 | int d = p->getDimension();
|
---|
1016 | nPlane[d] = pOn; nRight[d] -= pOn; nRight[d] -= pEnd;
|
---|
1017 | p->SAH(aabb, nLeft[d], nPlane[d], nRight[d], split);
|
---|
1018 | if (split.cost < best.cost)
|
---|
1019 | {
|
---|
1020 | best = split;
|
---|
1021 | }
|
---|
1022 | nLeft[d] += pStart; nLeft[d] += pOn; nPlane[d] = 0;
|
---|
1023 | }
|
---|
1024 |
|
---|
1025 | /************************************************/
|
---|
1026 | /**************** BEGIN TERMINATE ***************/
|
---|
1027 | /************************************************/
|
---|
1028 | // check terminating condition
|
---|
1029 | if (best.cost > PlaneEvent::KI*nObjects || level >= mMaxDepth)
|
---|
1030 | {
|
---|
1031 | // Terminating condition reached, create leaf and add renderables to list
|
---|
1032 | KdTree::Leaf * leaf = new KdTree::Leaf(this, level, aabb, parent);
|
---|
1033 | KdRenderable *rend;
|
---|
1034 | it = begin;
|
---|
1035 | while (it != end)
|
---|
1036 | {
|
---|
1037 | rend = it->getRenderable();
|
---|
1038 | rend->setClassified(false);
|
---|
1039 | if (rend->attachTo(leaf, this))
|
---|
1040 | {
|
---|
1041 | leaf->insert(rend);
|
---|
1042 | }
|
---|
1043 | it++;
|
---|
1044 | }
|
---|
1045 | // update stats
|
---|
1046 | ++ mTreeStats.mNumNodes;
|
---|
1047 | ++ mTreeStats.mNumLeaves;
|
---|
1048 | // update bounding box
|
---|
1049 | leaf->_updateBounds(false);
|
---|
1050 | return leaf;
|
---|
1051 | }
|
---|
1052 |
|
---|
1053 | /************************************************/
|
---|
1054 | /**************** BEGIN CLASSIFY ****************/
|
---|
1055 | /************************************************/
|
---|
1056 | // split the event list in left and right sub-lists
|
---|
1057 | else
|
---|
1058 | {
|
---|
1059 | PlaneEventList eventsRight, eventsLeft;
|
---|
1060 | it = begin;
|
---|
1061 | // slightly redundant, since we mark each renderable up to 6 times
|
---|
1062 | while (it != end)
|
---|
1063 | {
|
---|
1064 | it->getRenderable()->setSide(PlaneEvent::PES_BOTH);
|
---|
1065 | it->getRenderable()->setClassified(false);
|
---|
1066 | it++;
|
---|
1067 | }
|
---|
1068 | // now classify all renderables. do they belong to the left child, the right child or both?
|
---|
1069 | it = begin;
|
---|
1070 | while (it != end)
|
---|
1071 | {
|
---|
1072 | it->classify(best.event, best.side);
|
---|
1073 | it++;
|
---|
1074 | }
|
---|
1075 | // divide the event lists
|
---|
1076 | int nLeftS = 0, nRightS = 0, nBothS = 0;
|
---|
1077 | it = begin;
|
---|
1078 | while (it != end)
|
---|
1079 | {
|
---|
1080 | // right-only nodes go in right list
|
---|
1081 | if (it->getRenderable()->getSide() == PlaneEvent::PES_RIGHT)
|
---|
1082 | {
|
---|
1083 | if (!it->getRenderable()->isClassified())
|
---|
1084 | {
|
---|
1085 | it->getRenderable()->setClassified(true);
|
---|
1086 | nRightS++;
|
---|
1087 | }
|
---|
1088 | eventsRight.push_back(*it);
|
---|
1089 | }
|
---|
1090 | // left-only nodes go in left list
|
---|
1091 | else if (it->getRenderable()->getSide() == PlaneEvent::PES_LEFT)
|
---|
1092 | {
|
---|
1093 | if (!it->getRenderable()->isClassified())
|
---|
1094 | {
|
---|
1095 | it->getRenderable()->setClassified(true);
|
---|
1096 | nLeftS++;
|
---|
1097 | }
|
---|
1098 | eventsLeft.push_back(*it);
|
---|
1099 | }
|
---|
1100 | // remaining nodes go in both lists, bust must be clipped to prevent
|
---|
1101 | // events from lying outside the new nodes aabb
|
---|
1102 | else
|
---|
1103 | {
|
---|
1104 | if (!it->getRenderable()->isClassified())
|
---|
1105 | {
|
---|
1106 | it->getRenderable()->setClassified(true);
|
---|
1107 | nBothS++;
|
---|
1108 | }
|
---|
1109 | eventsRight.push_back(it->clip(best.bright, best.event.getDimension()));
|
---|
1110 | eventsLeft.push_back(it->clip(best.bleft, best.event.getDimension()));
|
---|
1111 | }
|
---|
1112 | it++;
|
---|
1113 | }
|
---|
1114 |
|
---|
1115 | // create a new branch node and continue recursion
|
---|
1116 | KdTree::Branch * branch = new KdTree::Branch(this, level, aabb, parent,
|
---|
1117 | best.event.getSplitPlane(), best.side);
|
---|
1118 |
|
---|
1119 | // now create the child nodes and continue recursion
|
---|
1120 | if (eventsLeft.size() > 0)
|
---|
1121 | {
|
---|
1122 | branch->mLeft = recBuild(eventsLeft, nLeftS + nBothS, best.bleft, branch);
|
---|
1123 | }
|
---|
1124 | if (eventsRight.size() > 0)
|
---|
1125 | {
|
---|
1126 | branch->mRight = recBuild(eventsRight, nBothS + nRightS, best.bright, branch);
|
---|
1127 | }
|
---|
1128 |
|
---|
1129 | // update stats
|
---|
1130 | ++ mTreeStats.mNumNodes;
|
---|
1131 |
|
---|
1132 | // update bounding box
|
---|
1133 | branch->_updateBounds(false);
|
---|
1134 |
|
---|
1135 | return branch;
|
---|
1136 | }
|
---|
1137 | }
|
---|
1138 |
|
---|
1139 | KdTree::Node * KdTree::pqBuild(PlaneEventList& events, int nObjects, AxisAlignedBox& aabb, KdTree::Branch * parent)
|
---|
1140 | {
|
---|
1141 | SplitCandidatePQ pqueue;
|
---|
1142 | Real globalTreeCost;
|
---|
1143 | Real globalSA;
|
---|
1144 |
|
---|
1145 | KdTree::Node * newNode = 0, * topNode = 0;
|
---|
1146 | // init global tree cost
|
---|
1147 | globalTreeCost = PlaneEvent::KI * nObjects;
|
---|
1148 | globalSA = PlaneEvent::surfaceArea(aabb);
|
---|
1149 |
|
---|
1150 | PlaneEventList * e = new PlaneEventList(events);
|
---|
1151 |
|
---|
1152 | // inital split candidate
|
---|
1153 | SplitInfo * best = pqFindPlane(e, nObjects, aabb, globalSA);
|
---|
1154 | SplitCandidate splitcandidate(e, nObjects, aabb, parent, globalTreeCost,
|
---|
1155 | globalTreeCost - best->cost, best, PlaneEvent::PES_BOTH);
|
---|
1156 | pqueue.push(splitcandidate);
|
---|
1157 |
|
---|
1158 |
|
---|
1159 | /*** BEGIN ITERATIVE BUILD ***/
|
---|
1160 | while (!pqueue.empty())
|
---|
1161 | {
|
---|
1162 | SplitCandidate sc = pqueue.top();
|
---|
1163 | pqueue.pop();
|
---|
1164 |
|
---|
1165 | // determine the depth we are on
|
---|
1166 | int level = 0;
|
---|
1167 | if (sc.parent)
|
---|
1168 | {
|
---|
1169 | level = sc.parent->getLevel() + 1;
|
---|
1170 | }
|
---|
1171 |
|
---|
1172 | /************************************************/
|
---|
1173 | /**************** BEGIN TERMINATE ***************/
|
---|
1174 | /************************************************/
|
---|
1175 | // check terminating condition
|
---|
1176 | if (sc.decrease < 0.0 || level >= mMaxDepth)
|
---|
1177 | {
|
---|
1178 | // Terminating condition reached, create leaf and add renderables to list
|
---|
1179 | KdTree::Leaf * leaf = new KdTree::Leaf(this, level, sc.aabb, sc.parent);
|
---|
1180 | KdRenderable *rend;
|
---|
1181 | PlaneEventList::iterator begin = sc.events->begin();
|
---|
1182 | PlaneEventList::iterator end = sc.events->end();
|
---|
1183 | PlaneEventList::iterator it = begin;
|
---|
1184 | while (it != end)
|
---|
1185 | {
|
---|
1186 | rend = it->getRenderable();
|
---|
1187 | rend->setClassified(false);
|
---|
1188 | if (rend->attachTo(leaf, this))
|
---|
1189 | {
|
---|
1190 | leaf->insert(rend);
|
---|
1191 | }
|
---|
1192 | it++;
|
---|
1193 | }
|
---|
1194 | newNode = leaf;
|
---|
1195 | if (!topNode)
|
---|
1196 | topNode = leaf;
|
---|
1197 | // update stats
|
---|
1198 | ++ mTreeStats.mNumNodes;
|
---|
1199 | ++ mTreeStats.mNumLeaves;
|
---|
1200 | }
|
---|
1201 |
|
---|
1202 | /************************************************/
|
---|
1203 | /**************** BEGIN CLASSIFY ****************/
|
---|
1204 | /************************************************/
|
---|
1205 | else
|
---|
1206 | {
|
---|
1207 | PlaneEventList * eventsLeft = new PlaneEventList();
|
---|
1208 | PlaneEventList * eventsRight = new PlaneEventList();
|
---|
1209 | PlaneEventList::iterator begin = sc.events->begin();
|
---|
1210 | PlaneEventList::iterator end = sc.events->end();
|
---|
1211 | PlaneEventList::iterator it = begin;
|
---|
1212 | // slightly redundant, since we mark each renderable up to 6 times
|
---|
1213 | while (it != end)
|
---|
1214 | {
|
---|
1215 | it->getRenderable()->setSide(PlaneEvent::PES_BOTH);
|
---|
1216 | it->getRenderable()->setClassified(false);
|
---|
1217 | it++;
|
---|
1218 | }
|
---|
1219 |
|
---|
1220 | // now classify all renderables. do they belong to the left child, the right child or both?
|
---|
1221 | it = begin;
|
---|
1222 | while (it != end)
|
---|
1223 | {
|
---|
1224 | it->classify(sc.best->event, sc.best->side);
|
---|
1225 | it++;
|
---|
1226 | }
|
---|
1227 |
|
---|
1228 | // divide the event lists
|
---|
1229 | int nLeftS = 0, nRightS = 0, nBothS = 0;
|
---|
1230 | it = begin;
|
---|
1231 | while (it != end)
|
---|
1232 | {
|
---|
1233 | // right-only events go in the right list
|
---|
1234 | if (it->getRenderable()->getSide() == PlaneEvent::PES_RIGHT)
|
---|
1235 | {
|
---|
1236 | if (!it->getRenderable()->isClassified())
|
---|
1237 | {
|
---|
1238 | it->getRenderable()->setClassified(true);
|
---|
1239 | nRightS++;
|
---|
1240 | }
|
---|
1241 |
|
---|
1242 | eventsRight->push_back(*it);
|
---|
1243 | }
|
---|
1244 | // left-only events go in the left list
|
---|
1245 | else if (it->getRenderable()->getSide() == PlaneEvent::PES_LEFT)
|
---|
1246 | {
|
---|
1247 | if (!it->getRenderable()->isClassified())
|
---|
1248 | {
|
---|
1249 | it->getRenderable()->setClassified(true);
|
---|
1250 | nLeftS++;
|
---|
1251 | }
|
---|
1252 | eventsLeft->push_back(*it);
|
---|
1253 | }
|
---|
1254 | // the rest goes in both lists after being clipped
|
---|
1255 | else
|
---|
1256 | {
|
---|
1257 | if (!it->getRenderable()->isClassified())
|
---|
1258 | {
|
---|
1259 | it->getRenderable()->setClassified(true);
|
---|
1260 | nBothS++;
|
---|
1261 | }
|
---|
1262 |
|
---|
1263 | eventsRight->push_back(it->clip(sc.best->bright, sc.best->event.getDimension()));
|
---|
1264 | eventsLeft->push_back(it->clip(sc.best->bleft, sc.best->event.getDimension()));
|
---|
1265 | }
|
---|
1266 | it++;
|
---|
1267 | }
|
---|
1268 |
|
---|
1269 | // create a new branch node
|
---|
1270 | KdTree::Branch * branch = new KdTree::Branch(this, level, sc.aabb, sc.parent,
|
---|
1271 | sc.best->event.getSplitPlane(), sc.best->side);
|
---|
1272 |
|
---|
1273 | globalTreeCost -= sc.decrease;
|
---|
1274 |
|
---|
1275 |
|
---|
1276 | // now for each potential child node, compute the split plane and the cost decrease
|
---|
1277 | // and place them in the queue
|
---|
1278 | if (eventsLeft->size() > 0)
|
---|
1279 | {
|
---|
1280 | best = pqFindPlane(eventsLeft, nLeftS + nBothS, sc.best->bleft, globalSA);
|
---|
1281 | Real old = PlaneEvent::surfaceArea(sc.best->bleft)/globalSA*PlaneEvent::KI*(nLeftS + nBothS);
|
---|
1282 | SplitCandidate scleft(eventsLeft, nLeftS + nBothS, sc.best->bleft,
|
---|
1283 | branch, old, old - best->cost, best, PlaneEvent::PES_LEFT);
|
---|
1284 | pqueue.push(scleft);
|
---|
1285 | }
|
---|
1286 | // cleanup
|
---|
1287 | else
|
---|
1288 | {
|
---|
1289 | delete eventsLeft;
|
---|
1290 | }
|
---|
1291 |
|
---|
1292 | if (eventsRight->size() > 0)
|
---|
1293 | {
|
---|
1294 | best = pqFindPlane(eventsRight, nBothS + nRightS, sc.best->bright, globalSA);
|
---|
1295 | Real old = PlaneEvent::surfaceArea(sc.best->bright)/globalSA*PlaneEvent::KI*(nBothS + nRightS);
|
---|
1296 | SplitCandidate scright(eventsRight, nBothS + nRightS, sc.best->bright,
|
---|
1297 | branch, old, old - best->cost, best, PlaneEvent::PES_RIGHT);
|
---|
1298 | pqueue.push(scright);
|
---|
1299 | }
|
---|
1300 | // cleanup
|
---|
1301 | else
|
---|
1302 | {
|
---|
1303 | delete eventsRight;
|
---|
1304 | }
|
---|
1305 |
|
---|
1306 | newNode = branch;
|
---|
1307 | if (!topNode)
|
---|
1308 | topNode = branch;
|
---|
1309 |
|
---|
1310 |
|
---|
1311 | // update stats
|
---|
1312 | ++ mTreeStats.mNumNodes;
|
---|
1313 | }
|
---|
1314 |
|
---|
1315 | // attach new node to parent
|
---|
1316 | if (sc.parent)
|
---|
1317 | {
|
---|
1318 | if (sc.side == PlaneEvent::PES_LEFT)
|
---|
1319 | {
|
---|
1320 | sc.parent->mLeft = newNode;
|
---|
1321 | }
|
---|
1322 | else if (sc.side == PlaneEvent::PES_RIGHT)
|
---|
1323 | {
|
---|
1324 | sc.parent->mRight = newNode;
|
---|
1325 | }
|
---|
1326 | else
|
---|
1327 | {
|
---|
1328 | OGRE_EXCEPT(Exception::ERR_INTERNAL_ERROR,
|
---|
1329 | "PQBUILD SNAFU - CHILD I AM NOT LEFT NOR RIGHT","KdTree::pqBuild");
|
---|
1330 | }
|
---|
1331 | }
|
---|
1332 |
|
---|
1333 | // update bounding boxes when geometry (leaf) was added
|
---|
1334 | if (newNode->isLeaf())
|
---|
1335 | newNode->_updateBounds();
|
---|
1336 |
|
---|
1337 | //cleanup
|
---|
1338 | OGRE_DELETE(sc.events);
|
---|
1339 | OGRE_DELETE(sc.best);
|
---|
1340 | }
|
---|
1341 | mBuildLog->logMessage("Cost after PQBUILD " + StringConverter::toString(globalTreeCost));
|
---|
1342 | return topNode;
|
---|
1343 | }
|
---|
1344 |
|
---|
1345 | //-------------------------------------------------------------------------
|
---|
1346 | SplitInfo * KdTree::pqFindPlane(PlaneEventList * events, int nObjects, AxisAlignedBox& aabb, Real globalSA)
|
---|
1347 | {
|
---|
1348 | static const int dim = 3;
|
---|
1349 | int pStart, pOn, pEnd;
|
---|
1350 | int nLeft[dim], nPlane[dim], nRight[dim];
|
---|
1351 | for (int i = 0; i < dim; i++)
|
---|
1352 | {
|
---|
1353 | nLeft[i] = 0; nPlane[i] = 0; nRight[i] = nObjects;
|
---|
1354 | }
|
---|
1355 |
|
---|
1356 | SplitInfo split, best;
|
---|
1357 | best.cost = Math::POS_INFINITY;
|
---|
1358 |
|
---|
1359 | Real parentSA = PlaneEvent::surfaceArea(aabb);
|
---|
1360 |
|
---|
1361 | PlaneEventList::iterator begin = events->begin();
|
---|
1362 | PlaneEventList::iterator end = events->end();
|
---|
1363 | PlaneEventList::iterator it = begin;
|
---|
1364 | // try all planes to find the best one for the given set of objects
|
---|
1365 | while (it != end)
|
---|
1366 | {
|
---|
1367 | PlaneEventList::iterator p = it;
|
---|
1368 | pStart = pOn = pEnd = 0;
|
---|
1369 | while (it != end && p->equalsType(*it, PlaneEvent::PET_END))
|
---|
1370 | {
|
---|
1371 | it++; pEnd++;
|
---|
1372 | }
|
---|
1373 | while (it != end && p->equalsType(*it, PlaneEvent::PET_ON))
|
---|
1374 | {
|
---|
1375 | it++; pOn++;
|
---|
1376 | }
|
---|
1377 | while (it != end && p->equalsType(*it, PlaneEvent::PET_START))
|
---|
1378 | {
|
---|
1379 | it++; pStart++;
|
---|
1380 | }
|
---|
1381 | int d = p->getDimension();
|
---|
1382 | nPlane[d] = pOn; nRight[d] -= pOn; nRight[d] -= pEnd;
|
---|
1383 | p->pqSAH(globalSA, parentSA, nLeft[d], nPlane[d], nRight[d], aabb, split);
|
---|
1384 | if (split.cost < best.cost)
|
---|
1385 | {
|
---|
1386 | best = split;
|
---|
1387 | }
|
---|
1388 | nLeft[d] += pStart; nLeft[d] += pOn; nPlane[d] = 0;
|
---|
1389 | }
|
---|
1390 | return new SplitInfo(best);
|
---|
1391 | }
|
---|
1392 |
|
---|
1393 |
|
---|
1394 |
|
---|
1395 | /************************************************************************/
|
---|
1396 | /* KdTree rendering functions */
|
---|
1397 | /************************************************************************/
|
---|
1398 |
|
---|
1399 | //-------------------------------------------------------------------------
|
---|
1400 | void KdTree::queueVisibleObjects(KdTreeCamera* cam, RenderQueue* queue, bool onlyShadowCasters,
|
---|
1401 | bool showBoxes, KdTree::NodeList& visibleNodes)
|
---|
1402 | {
|
---|
1403 | mFrameStats.clear();
|
---|
1404 | cam->mNumVisQueries = 0;
|
---|
1405 |
|
---|
1406 | if (mKdRoot)
|
---|
1407 | recQueueVisibleObjects(mKdRoot, Root::getSingleton().getCurrentFrameNumber(),
|
---|
1408 | cam, queue, onlyShadowCasters, showBoxes, visibleNodes);
|
---|
1409 |
|
---|
1410 | mFrameStats.mTraversedNodes = cam->mNumVisQueries;
|
---|
1411 | }
|
---|
1412 |
|
---|
1413 | //-------------------------------------------------------------------------
|
---|
1414 | void KdTree::recQueueVisibleObjects(KdTree::Node * node, unsigned long currentFrame,
|
---|
1415 | KdTreeCamera* cam, RenderQueue* queue, bool onlyShadowCasters, bool showBoxes,
|
---|
1416 | KdTree::NodeList& visibleNodes, bool fullVis)
|
---|
1417 | {
|
---|
1418 | KdTreeCamera::NodeVisibility vis = KdTreeCamera::KDNV_PART;
|
---|
1419 | // test visibility
|
---|
1420 | //if (cam->isVisible(node->mAABB))
|
---|
1421 | if (fullVis ||
|
---|
1422 | ((vis = (cam->*getVisibility)(node->mAABB)) != KdTreeCamera::KDNV_NONE))
|
---|
1423 | {
|
---|
1424 | visibleNodes.push_back(node);
|
---|
1425 |
|
---|
1426 | bool v = (fullVis || vis == KdTreeCamera::KDNV_FULL);
|
---|
1427 |
|
---|
1428 | node->queueVisibleObjects(currentFrame, cam, queue, onlyShadowCasters, showBoxes, v);
|
---|
1429 |
|
---|
1430 | if (v || node->isLeaf())
|
---|
1431 | ++ mFrameStats.mRenderedNodes;
|
---|
1432 |
|
---|
1433 | if (!v)
|
---|
1434 | {
|
---|
1435 |
|
---|
1436 | if (node->getLeftChild())
|
---|
1437 | recQueueVisibleObjects(node->getLeftChild(), currentFrame,
|
---|
1438 | cam, queue, onlyShadowCasters, showBoxes, visibleNodes, v);
|
---|
1439 | if (node->getRightChild())
|
---|
1440 | recQueueVisibleObjects(node->getRightChild(), currentFrame,
|
---|
1441 | cam, queue, onlyShadowCasters, showBoxes, visibleNodes, v);
|
---|
1442 | }
|
---|
1443 | }
|
---|
1444 | else
|
---|
1445 | {
|
---|
1446 | ++ mFrameStats.mFrustumCulledNodes;
|
---|
1447 | }
|
---|
1448 | }
|
---|
1449 |
|
---|
1450 | //-------------------------------------------------------------------------
|
---|
1451 | void KdTree::setEnhancedVis(bool enh)
|
---|
1452 | {
|
---|
1453 | if (enh)
|
---|
1454 | getVisibility = &KdTreeCamera::getVisibilityEnhanced;
|
---|
1455 | else
|
---|
1456 | getVisibility = &KdTreeCamera::getVisibilitySimple;
|
---|
1457 | }
|
---|
1458 |
|
---|
1459 | //-------------------------------------------------------------------------
|
---|
1460 | bool KdTree::getEnhancedVis()
|
---|
1461 | {
|
---|
1462 | return getVisibility == &KdTreeCamera::getVisibilityEnhanced;
|
---|
1463 | }
|
---|
1464 |
|
---|
1465 | //-------------------------------------------------------------------------
|
---|
1466 | //void KdTree::findVisibleNodes(NodeList& visibleNodes, Camera * cam)
|
---|
1467 | //{
|
---|
1468 | // if (mKdRoot)
|
---|
1469 | // recFindVisibleNodes(mKdRoot, visibleNodes, cam);
|
---|
1470 | //}
|
---|
1471 |
|
---|
1472 | ////-------------------------------------------------------------------------
|
---|
1473 | //void KdTree::recFindVisibleNodes(KdTree::Node * node, NodeList& visibleNodes, Camera * cam)
|
---|
1474 | //{
|
---|
1475 | // // test visibility
|
---|
1476 | // if (cam->isVisible(node->mAABB))
|
---|
1477 | // {
|
---|
1478 | // visibleNodes.push_back(node);
|
---|
1479 |
|
---|
1480 | // if (node->getLeftChild())
|
---|
1481 | // recFindVisibleNodes(node->getLeftChild(), visibleNodes, cam);
|
---|
1482 | // if (node->getRightChild())
|
---|
1483 | // recFindVisibleNodes(node->getRightChild(), visibleNodes, cam);
|
---|
1484 | // }
|
---|
1485 | //}
|
---|
1486 |
|
---|
1487 | void KdTree::findNodesIn(const AxisAlignedBox &box, std::list<SceneNode *> &list, SceneNode *exclude)
|
---|
1488 | {
|
---|
1489 | if (mKdRoot)
|
---|
1490 | recFindNodesIn(box, list, exclude, mKdRoot);
|
---|
1491 | }
|
---|
1492 |
|
---|
1493 | void KdTree::findNodesIn(const Sphere &sphere, std::list<SceneNode *> &list, SceneNode *exclude)
|
---|
1494 | {
|
---|
1495 | if (mKdRoot)
|
---|
1496 | recFindNodesIn(sphere, list, exclude, mKdRoot);
|
---|
1497 | }
|
---|
1498 |
|
---|
1499 | void KdTree::findNodesIn(const PlaneBoundedVolume &volume, std::list<SceneNode *> &list, SceneNode *exclude)
|
---|
1500 | {
|
---|
1501 | if (mKdRoot)
|
---|
1502 | recFindNodesIn(volume, list, exclude, mKdRoot);
|
---|
1503 | }
|
---|
1504 |
|
---|
1505 | void KdTree::findNodesIn(const Ray &ray, std::list<SceneNode *> &list, SceneNode *exclude)
|
---|
1506 | {
|
---|
1507 | if (mKdRoot)
|
---|
1508 | recFindNodesIn(ray, list, exclude, mKdRoot);
|
---|
1509 | }
|
---|
1510 |
|
---|
1511 | void KdTree::recFindNodesIn(const AxisAlignedBox &box, std::list<SceneNode *> &list, SceneNode *exclude, Node * node, bool full)
|
---|
1512 | {
|
---|
1513 | // check intersection
|
---|
1514 | if ( !full )
|
---|
1515 | {
|
---|
1516 | BvhIntersection isect = intersect(box, node->_getWorldAABB());
|
---|
1517 |
|
---|
1518 | if ( isect == OUTSIDE )
|
---|
1519 | return ;
|
---|
1520 |
|
---|
1521 | full = ( isect == INSIDE );
|
---|
1522 | }
|
---|
1523 |
|
---|
1524 | if (node->isLeaf())
|
---|
1525 | {
|
---|
1526 | LeafPtr leaf = KDLEAFPTR_CAST(node);
|
---|
1527 | for (KdRenderableList::iterator it = leaf->mKdRenderables.begin();
|
---|
1528 | it != leaf->mKdRenderables.end(); it ++)
|
---|
1529 | {
|
---|
1530 | SceneNode *sn = dynamic_cast<SceneNode *>(*it);
|
---|
1531 |
|
---|
1532 | if (sn != exclude)
|
---|
1533 | {
|
---|
1534 | if (full)
|
---|
1535 | {
|
---|
1536 | list.push_back(sn);
|
---|
1537 | }
|
---|
1538 | else
|
---|
1539 | {
|
---|
1540 | BvhIntersection nsect = intersect(box, sn->_getWorldAABB());
|
---|
1541 |
|
---|
1542 | if ( nsect != OUTSIDE )
|
---|
1543 | {
|
---|
1544 | list.push_back(sn);
|
---|
1545 | }
|
---|
1546 | }
|
---|
1547 | }
|
---|
1548 | }
|
---|
1549 | }
|
---|
1550 | else
|
---|
1551 | {
|
---|
1552 | if (node->getLeftChild())
|
---|
1553 | recFindNodesIn(box, list, exclude, node->getLeftChild(), full);
|
---|
1554 | if (node->getRightChild())
|
---|
1555 | recFindNodesIn(box, list, exclude, node->getRightChild(), full);
|
---|
1556 | }
|
---|
1557 | }
|
---|
1558 |
|
---|
1559 | void KdTree::recFindNodesIn(const Sphere &sphere, std::list<SceneNode *> &list, SceneNode *exclude, Node * node, bool full)
|
---|
1560 | {
|
---|
1561 | // TODO
|
---|
1562 | }
|
---|
1563 |
|
---|
1564 | void KdTree::recFindNodesIn(const PlaneBoundedVolume &volume, std::list<SceneNode *> &list, SceneNode *exclude, Node * node, bool full)
|
---|
1565 | {
|
---|
1566 | // TODO
|
---|
1567 | }
|
---|
1568 |
|
---|
1569 | void KdTree::recFindNodesIn(const Ray &ray, std::list<SceneNode *> &list, SceneNode *exclude, Node * node, bool full)
|
---|
1570 | {
|
---|
1571 | // TODO
|
---|
1572 | }
|
---|
1573 |
|
---|
1574 | /************************************************************************/
|
---|
1575 | /* KdTree debug & helper functions */
|
---|
1576 | /************************************************************************/
|
---|
1577 |
|
---|
1578 | //-------------------------------------------------------------------------
|
---|
1579 | void KdTree::dump()
|
---|
1580 | {
|
---|
1581 | //LogManager::getSingleton().logMessage("#@#@#@#@ Dumping KdTree #@#@#@#@");
|
---|
1582 | mBuildLog->logMessage("#@#@#@#@ Dumping KdTree #@#@#@#@");
|
---|
1583 | if (mKdRoot)
|
---|
1584 | dump(mKdRoot);
|
---|
1585 | }
|
---|
1586 |
|
---|
1587 | //-------------------------------------------------------------------------
|
---|
1588 | void KdTree::dump(KdTree::Node * node)
|
---|
1589 | {
|
---|
1590 | //LogManager * log = LogManager::getSingletonPtr();
|
---|
1591 | KdTreeSceneNode * scenenode;
|
---|
1592 | String pad;
|
---|
1593 | int p;
|
---|
1594 |
|
---|
1595 | pad = "";
|
---|
1596 | for (p = 0; p < node->getLevel(); p++)
|
---|
1597 | {
|
---|
1598 | pad += " ";
|
---|
1599 | }
|
---|
1600 |
|
---|
1601 | if (node->isLeaf())
|
---|
1602 | {
|
---|
1603 | KdTree::Leaf * leaf = KDLEAFPTR_CAST(node);
|
---|
1604 | KdRenderableList::iterator it = leaf->mKdRenderables.begin();
|
---|
1605 | KdRenderableList::iterator end = leaf->mKdRenderables.end();
|
---|
1606 | while (it != end)
|
---|
1607 | {
|
---|
1608 | scenenode = dynamic_cast<KdTreeSceneNode *>(*it);
|
---|
1609 | mBuildLog->logMessage(pad + "# Leaf level " +
|
---|
1610 | StringConverter::toString(node->getLevel()) +
|
---|
1611 | " SceneNode " + scenenode->getName());
|
---|
1612 | mBuildLog->logMessage(pad + "## Objects: " + scenenode->dumpToString());
|
---|
1613 | it++;
|
---|
1614 | }
|
---|
1615 | }
|
---|
1616 | else
|
---|
1617 | {
|
---|
1618 | KdTree::Branch * branch = KDBRANCHPTR_CAST(node);
|
---|
1619 | if (branch->mLeft)
|
---|
1620 | {
|
---|
1621 | mBuildLog->logMessage(pad + "# Branch level " +
|
---|
1622 | StringConverter::toString(node->getLevel()) + " Left Child");
|
---|
1623 | dump(branch->mLeft);
|
---|
1624 | }
|
---|
1625 | if (branch->mRight)
|
---|
1626 | {
|
---|
1627 | mBuildLog->logMessage(pad + "# Branch level " +
|
---|
1628 | StringConverter::toString(node->getLevel()) + " Right Child");
|
---|
1629 | dump(branch->mRight);
|
---|
1630 | }
|
---|
1631 | }
|
---|
1632 | }
|
---|
1633 |
|
---|
1634 | //-------------------------------------------------------------------------
|
---|
1635 | Real KdTree::calcCost()
|
---|
1636 | {
|
---|
1637 | if (mKdRoot)
|
---|
1638 | return calcCost(mKdRoot, PlaneEvent::surfaceArea(mKdRoot->mAABB));
|
---|
1639 | else
|
---|
1640 | return 0;
|
---|
1641 | }
|
---|
1642 |
|
---|
1643 | //-------------------------------------------------------------------------
|
---|
1644 | Real KdTree::calcCost(KdTree::Node * node, Real vs)
|
---|
1645 | {
|
---|
1646 | if (node == 0)
|
---|
1647 | return 0.0;
|
---|
1648 |
|
---|
1649 | if (node->isLeaf())
|
---|
1650 | {
|
---|
1651 | KdTree::Leaf * leaf = KDLEAFPTR_CAST(node);
|
---|
1652 | return (PlaneEvent::surfaceArea(node->mAABB)/vs) *
|
---|
1653 | PlaneEvent::KI * leaf->mKdRenderables.size();
|
---|
1654 | }
|
---|
1655 | else
|
---|
1656 | {
|
---|
1657 | KdTree::Branch * branch = KDBRANCHPTR_CAST(node);
|
---|
1658 | return (PlaneEvent::surfaceArea(node->mAABB)/vs) * PlaneEvent::KT +
|
---|
1659 | calcCost(branch->mLeft, vs) + calcCost(branch->mRight, vs);
|
---|
1660 | }
|
---|
1661 | }
|
---|
1662 |
|
---|
1663 | /************************************************************************/
|
---|
1664 | /* KdTree::Node/Branch/Leaf functions */
|
---|
1665 | /************************************************************************/
|
---|
1666 |
|
---|
1667 | //-------------------------------------------------------------------------
|
---|
1668 | KdTree::Leaf::~Leaf()
|
---|
1669 | {
|
---|
1670 | // detach all scene nodes in the case that we are rebuilding
|
---|
1671 | // the tree but not the scene
|
---|
1672 | KdRenderableList::iterator it = mKdRenderables.begin();
|
---|
1673 | KdRenderableList::iterator end = mKdRenderables.end();
|
---|
1674 | while (it != end)
|
---|
1675 | {
|
---|
1676 | (*it)->detachFrom(this);
|
---|
1677 | it++;
|
---|
1678 | }
|
---|
1679 | mKdRenderables.clear();
|
---|
1680 | }
|
---|
1681 |
|
---|
1682 | //-------------------------------------------------------------------------
|
---|
1683 | void KdTree::Leaf::queueVisibleObjects(unsigned long currentFrame,
|
---|
1684 | Camera* cam, RenderQueue* queue, bool onlyShadowCasters, bool showBoxes, bool fullVis)
|
---|
1685 | {
|
---|
1686 | KdRenderableList::iterator it = mKdRenderables.begin();
|
---|
1687 | KdRenderableList::iterator end = mKdRenderables.end();
|
---|
1688 | while (it != end)
|
---|
1689 | {
|
---|
1690 | if (!(*it)->isQueued(currentFrame, cam))
|
---|
1691 | {
|
---|
1692 | (*it)->queueObjects(cam, queue, onlyShadowCasters);
|
---|
1693 | }
|
---|
1694 | it++;
|
---|
1695 | }
|
---|
1696 |
|
---|
1697 | if (showBoxes)
|
---|
1698 | {
|
---|
1699 | if (mLevel == mOwner->getHiLiteLevel() || mOwner->getShowAllBoxes())
|
---|
1700 | queue->addRenderable(getWireBoundingBox());
|
---|
1701 | }
|
---|
1702 | }
|
---|
1703 |
|
---|
1704 | //-------------------------------------------------------------------------
|
---|
1705 | void KdTree::Leaf::getGeometryList(GtpVisibility::GeometryVector *geometryList)
|
---|
1706 | {
|
---|
1707 | KdRenderableList::iterator it = mKdRenderables.begin();
|
---|
1708 | KdRenderableList::iterator end = mKdRenderables.end();
|
---|
1709 | while (it != end)
|
---|
1710 | {
|
---|
1711 | (*it)->getGeometryList(geometryList);
|
---|
1712 | it++;
|
---|
1713 | }
|
---|
1714 | }
|
---|
1715 |
|
---|
1716 | //-------------------------------------------------------------------------
|
---|
1717 | // update the world aabb based on the contained geometry
|
---|
1718 | void KdTree::Leaf::_updateBounds(bool recurse)
|
---|
1719 | {
|
---|
1720 | // reset box
|
---|
1721 | mWorldAABB.setNull();
|
---|
1722 |
|
---|
1723 | // merge boxes from attached geometry
|
---|
1724 | KdRenderableList::iterator it = mKdRenderables.begin();
|
---|
1725 | KdRenderableList::iterator end = mKdRenderables.end();
|
---|
1726 | while (it != end)
|
---|
1727 | {
|
---|
1728 | //(*it)->_updateBounds();
|
---|
1729 | mWorldAABB.merge((*it)->getBoundingBox());
|
---|
1730 | it++;
|
---|
1731 | }
|
---|
1732 |
|
---|
1733 | // update parent recursively
|
---|
1734 | if (recurse && mParent)
|
---|
1735 | mParent->_updateBounds(recurse);
|
---|
1736 | }
|
---|
1737 |
|
---|
1738 | } // namespace Ogre |
---|