1 | /*
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2 | -----------------------------------------------------------------------------
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3 | This source file is part of OGRE
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4 | (Object-oriented Graphics Rendering Engine)
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5 | For the latest info, see http://ogre.sourceforge.net/
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6 |
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7 | Copyright (c) 2000-2005 The OGRE Team
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8 | Also see acknowledgements in Readme.html
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9 |
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10 | This program is free software; you can redistribute it and/or modify it under
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11 | the terms of the GNU Lesser General Public License as published by the Free Software
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12 | Foundation; either version 2 of the License, or (at your option) any later
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13 | version.
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14 |
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15 | This program is distributed in the hope that it will be useful, but WITHOUT
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16 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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17 | FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
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18 |
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19 | You should have received a copy of the GNU Lesser General Public License along with
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20 | this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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21 | Place - Suite 330, Boston, MA 02111-1307, USA, or go to
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22 | http://www.gnu.org/copyleft/lesser.txt.
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23 | -----------------------------------------------------------------------------
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24 | */
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25 | #include "OgreStableHeaders.h"
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26 | #include "OgreFrustum.h"
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27 |
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28 | #include "OgreMath.h"
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29 | #include "OgreMatrix3.h"
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30 | #include "OgreSceneNode.h"
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31 | #include "OgreSphere.h"
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32 | #include "OgreLogManager.h"
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33 | #include "OgreException.h"
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34 | #include "OgreRoot.h"
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35 | #include "OgreCamera.h"
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36 | #include "OgreHardwareBufferManager.h"
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37 | #include "OgreHardwareVertexBuffer.h"
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38 | #include "OgreHardwareIndexBuffer.h"
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39 | #include "OgreMaterialManager.h"
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40 | #include "OgreRenderSystem.h"
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41 |
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42 | namespace Ogre {
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43 |
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44 | String Frustum::msMovableType = "Frustum";
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45 | const Real Frustum::INFINITE_FAR_PLANE_ADJUST = 0.00001;
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46 | //-----------------------------------------------------------------------
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47 | Frustum::Frustum() :
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48 | mProjType(PT_PERSPECTIVE),
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49 | mFOVy(Radian(Math::PI/4.0)),
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50 | mFarDist(100000.0f),
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51 | mNearDist(100.0f),
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52 | mAspect(1.33333333333333f),
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53 | mFrustumOffset(Vector2::ZERO),
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54 | mFocalLength(1.0f),
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55 | mLastParentOrientation(Quaternion::IDENTITY),
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56 | mLastParentPosition(Vector3::ZERO),
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57 | mRecalcFrustum(true),
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58 | mRecalcView(true),
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59 | mRecalcFrustumPlanes(true),
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60 | mRecalcWorldSpaceCorners(true),
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61 | mRecalcVertexData(true),
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62 | mCustomViewMatrix(false),
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63 | mCustomProjMatrix(false),
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64 | mReflect(false),
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65 | mLinkedReflectPlane(0),
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66 | mObliqueDepthProjection(false),
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67 | mLinkedObliqueProjPlane(0)
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68 | {
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69 | // Initialise material
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70 | mMaterial = MaterialManager::getSingleton().getByName("BaseWhiteNoLighting");
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71 |
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72 | // Alter superclass members
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73 | mVisible = false;
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74 | mParentNode = 0;
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75 |
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76 | mLastLinkedReflectionPlane.normal = Vector3::ZERO;
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77 | mLastLinkedObliqueProjPlane.normal = Vector3::ZERO;
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78 |
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79 |
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80 | updateView();
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81 | updateFrustum();
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82 | }
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83 |
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84 | //-----------------------------------------------------------------------
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85 | Frustum::~Frustum()
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86 | {
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87 | // Do nothing
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88 | }
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89 |
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90 | //-----------------------------------------------------------------------
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91 | void Frustum::setFOVy(const Radian& fov)
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92 | {
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93 | mFOVy = fov;
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94 | invalidateFrustum();
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95 | }
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96 |
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97 | //-----------------------------------------------------------------------
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98 | const Radian& Frustum::getFOVy(void) const
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99 | {
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100 | return mFOVy;
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101 | }
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102 |
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103 |
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104 | //-----------------------------------------------------------------------
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105 | void Frustum::setFarClipDistance(Real farPlane)
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106 | {
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107 | mFarDist = farPlane;
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108 | invalidateFrustum();
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109 | }
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110 |
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111 | //-----------------------------------------------------------------------
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112 | Real Frustum::getFarClipDistance(void) const
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113 | {
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114 | return mFarDist;
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115 | }
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116 |
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117 | //-----------------------------------------------------------------------
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118 | void Frustum::setNearClipDistance(Real nearPlane)
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119 | {
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120 | if (nearPlane <= 0)
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121 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "Near clip distance must be greater than zero.",
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122 | "Frustum::setNearClipDistance");
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123 | mNearDist = nearPlane;
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124 | invalidateFrustum();
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125 | }
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126 |
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127 | //-----------------------------------------------------------------------
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128 | Real Frustum::getNearClipDistance(void) const
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129 | {
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130 | return mNearDist;
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131 | }
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132 |
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133 | //---------------------------------------------------------------------
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134 | void Frustum::setFrustumOffset(const Vector2& offset)
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135 | {
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136 | mFrustumOffset = offset;
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137 | invalidateFrustum();
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138 | }
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139 | //---------------------------------------------------------------------
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140 | void Frustum::setFrustumOffset(Real horizontal, Real vertical)
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141 | {
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142 | setFrustumOffset(Vector2(horizontal, vertical));
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143 | }
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144 | //---------------------------------------------------------------------
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145 | const Vector2& Frustum::getFrustumOffset() const
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146 | {
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147 | return mFrustumOffset;
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148 | }
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149 | //---------------------------------------------------------------------
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150 | void Frustum::setFocalLength(Real focalLength)
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151 | {
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152 | if (focalLength <= 0)
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153 | {
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154 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS,
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155 | "Focal length must be greater than zero.",
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156 | "Frustum::setFocalLength");
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157 | }
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158 |
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159 | mFocalLength = focalLength;
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160 | invalidateFrustum();
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161 | }
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162 | //---------------------------------------------------------------------
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163 | Real Frustum::getFocalLength() const
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164 | {
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165 | return mFocalLength;
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166 | }
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167 | //-----------------------------------------------------------------------
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168 | const Matrix4& Frustum::getProjectionMatrix(void) const
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169 | {
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170 |
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171 | updateFrustum();
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172 |
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173 | return mProjMatrix;
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174 | }
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175 | //-----------------------------------------------------------------------
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176 | const Matrix4& Frustum::getProjectionMatrixWithRSDepth(void) const
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177 | {
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178 |
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179 | updateFrustum();
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180 |
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181 | return mProjMatrixRSDepth;
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182 | }
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183 | //-----------------------------------------------------------------------
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184 | const Matrix4& Frustum::getProjectionMatrixRS(void) const
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185 | {
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186 |
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187 | updateFrustum();
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188 |
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189 | return mProjMatrixRS;
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190 | }
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191 | //-----------------------------------------------------------------------
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192 | const Matrix4& Frustum::getViewMatrix(void) const
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193 | {
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194 | updateView();
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195 |
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196 | return mViewMatrix;
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197 |
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198 | }
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199 |
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200 | //-----------------------------------------------------------------------
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201 | const Plane* Frustum::getFrustumPlanes(void) const
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202 | {
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203 | // Make any pending updates to the calculated frustum planes
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204 | updateFrustumPlanes();
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205 |
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206 | return mFrustumPlanes;
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207 | }
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208 |
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209 | //-----------------------------------------------------------------------
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210 | const Plane& Frustum::getFrustumPlane(unsigned short plane) const
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211 | {
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212 | // Make any pending updates to the calculated frustum planes
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213 | updateFrustumPlanes();
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214 |
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215 | return mFrustumPlanes[plane];
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216 |
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217 | }
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218 |
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219 | //-----------------------------------------------------------------------
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220 | bool Frustum::isVisible(const AxisAlignedBox& bound, FrustumPlane* culledBy) const
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221 | {
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222 | // Null boxes always invisible
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223 | if (bound.isNull()) return false;
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224 |
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225 | // Make any pending updates to the calculated frustum planes
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226 | updateFrustumPlanes();
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227 |
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228 | // Get corners of the box
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229 | const Vector3* pCorners = bound.getAllCorners();
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230 |
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231 |
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232 | // For each plane, see if all points are on the negative side
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233 | // If so, object is not visible
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234 | for (int plane = 0; plane < 6; ++plane)
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235 | {
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236 | // Skip far plane if infinite view frustum
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237 | if (mFarDist == 0 && plane == FRUSTUM_PLANE_FAR)
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238 | continue;
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239 |
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240 | if (mFrustumPlanes[plane].getSide(pCorners[0]) == Plane::NEGATIVE_SIDE &&
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241 | mFrustumPlanes[plane].getSide(pCorners[1]) == Plane::NEGATIVE_SIDE &&
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242 | mFrustumPlanes[plane].getSide(pCorners[2]) == Plane::NEGATIVE_SIDE &&
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243 | mFrustumPlanes[plane].getSide(pCorners[3]) == Plane::NEGATIVE_SIDE &&
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244 | mFrustumPlanes[plane].getSide(pCorners[4]) == Plane::NEGATIVE_SIDE &&
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245 | mFrustumPlanes[plane].getSide(pCorners[5]) == Plane::NEGATIVE_SIDE &&
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246 | mFrustumPlanes[plane].getSide(pCorners[6]) == Plane::NEGATIVE_SIDE &&
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247 | mFrustumPlanes[plane].getSide(pCorners[7]) == Plane::NEGATIVE_SIDE)
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248 | {
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249 | // ALL corners on negative side therefore out of view
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250 | if (culledBy)
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251 | *culledBy = (FrustumPlane)plane;
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252 | return false;
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253 | }
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254 |
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255 | }
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256 |
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257 | return true;
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258 | }
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259 |
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260 | //-----------------------------------------------------------------------
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261 | bool Frustum::isVisible(const Vector3& vert, FrustumPlane* culledBy) const
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262 | {
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263 | // Make any pending updates to the calculated frustum planes
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264 | updateFrustumPlanes();
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265 |
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266 | // For each plane, see if all points are on the negative side
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267 | // If so, object is not visible
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268 | for (int plane = 0; plane < 6; ++plane)
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269 | {
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270 | // Skip far plane if infinite view frustum
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271 | if (mFarDist == 0 && plane == FRUSTUM_PLANE_FAR)
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272 | continue;
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273 |
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274 | if (mFrustumPlanes[plane].getSide(vert) == Plane::NEGATIVE_SIDE)
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275 | {
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276 | // ALL corners on negative side therefore out of view
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277 | if (culledBy)
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278 | *culledBy = (FrustumPlane)plane;
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279 | return false;
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280 | }
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281 |
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282 | }
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283 |
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284 | return true;
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285 | }
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286 |
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287 | //-----------------------------------------------------------------------
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288 | bool Frustum::isVisible(const Sphere& sphere, FrustumPlane* culledBy) const
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289 | {
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290 | // Make any pending updates to the calculated frustum planes
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291 | updateFrustumPlanes();
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292 |
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293 | // For each plane, see if sphere is on negative side
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294 | // If so, object is not visible
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295 | for (int plane = 0; plane < 6; ++plane)
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296 | {
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297 | // Skip far plane if infinite view frustum
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298 | if (mFarDist == 0 && plane == FRUSTUM_PLANE_FAR)
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299 | continue;
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300 |
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301 | // If the distance from sphere center to plane is negative, and 'more negative'
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302 | // than the radius of the sphere, sphere is outside frustum
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303 | if (mFrustumPlanes[plane].getDistance(sphere.getCenter()) < -sphere.getRadius())
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304 | {
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305 | // ALL corners on negative side therefore out of view
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306 | if (culledBy)
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307 | *culledBy = (FrustumPlane)plane;
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308 | return false;
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309 | }
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310 |
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311 | }
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312 |
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313 | return true;
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314 | }
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315 | //-----------------------------------------------------------------------
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316 | void Frustum::calcProjectionParameters(Real& left, Real& right, Real& bottom, Real& top) const
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317 | {
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318 | if (mCustomProjMatrix)
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319 | {
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320 | // Convert clipspace corners to camera space
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321 | Matrix4 invProj = mProjMatrix.inverse();
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322 | Vector3 topLeft(-0.5f, 0.5f, 0.0f);
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323 | Vector3 bottomRight(0.5f, -0.5f, 0.0f);
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324 |
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325 | topLeft = invProj * topLeft;
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326 | bottomRight = invProj * bottomRight;
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327 |
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328 | left = topLeft.x;
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329 | top = topLeft.y;
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330 | right = bottomRight.x;
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331 | bottom = bottomRight.y;
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332 |
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333 | }
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334 | else
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335 | {
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336 | // Calculate general projection parameters
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337 |
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338 | Radian thetaY (mFOVy * 0.5f);
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339 | Real tanThetaY = Math::Tan(thetaY);
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340 | Real tanThetaX = tanThetaY * mAspect;
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341 |
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342 | // Unknow how to apply frustum offset to orthographic camera, just ignore here
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343 | Real nearFocal = (mProjType == PT_PERSPECTIVE) ? mNearDist / mFocalLength : 0;
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344 | Real nearOffsetX = mFrustumOffset.x * nearFocal;
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345 | Real nearOffsetY = mFrustumOffset.y * nearFocal;
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346 | Real half_w = tanThetaX * mNearDist;
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347 | Real half_h = tanThetaY * mNearDist;
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348 |
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349 | left = - half_w + nearOffsetX;
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350 | right = + half_w + nearOffsetX;
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351 | bottom = - half_h + nearOffsetY;
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352 | top = + half_h + nearOffsetY;
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353 | }
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354 | }
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355 | //-----------------------------------------------------------------------
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356 | void Frustum::updateFrustumImpl(void) const
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357 | {
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358 | // Common calcs
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359 | Real left, right, bottom, top;
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360 | calcProjectionParameters(left, right, bottom, top);
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361 |
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362 | if (!mCustomProjMatrix)
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363 | {
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364 |
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365 | // The code below will dealing with general projection
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366 | // parameters, similar glFrustum and glOrtho.
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367 | // Doesn't optimise manually except division operator, so the
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368 | // code more self-explaining.
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369 |
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370 | Real inv_w = 1 / (right - left);
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371 | Real inv_h = 1 / (top - bottom);
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372 | Real inv_d = 1 / (mFarDist - mNearDist);
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373 |
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374 | // Recalc if frustum params changed
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375 | if (mProjType == PT_PERSPECTIVE)
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376 | {
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377 | // Calc matrix elements
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378 | Real A = 2 * mNearDist * inv_w;
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379 | Real B = 2 * mNearDist * inv_h;
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380 | Real C = (right + left) * inv_w;
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381 | Real D = (top + bottom) * inv_h;
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382 | Real q, qn;
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383 | if (mFarDist == 0)
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384 | {
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385 | // Infinite far plane
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386 | q = Frustum::INFINITE_FAR_PLANE_ADJUST - 1;
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387 | qn = mNearDist * (Frustum::INFINITE_FAR_PLANE_ADJUST - 2);
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388 | }
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389 | else
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390 | {
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391 | q = - (mFarDist + mNearDist) * inv_d;
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392 | qn = -2 * (mFarDist * mNearDist) * inv_d;
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393 | }
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394 |
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395 | // NB: This creates 'uniform' perspective projection matrix,
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396 | // which depth range [-1,1], right-handed rules
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397 | //
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398 | // [ A 0 C 0 ]
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399 | // [ 0 B D 0 ]
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400 | // [ 0 0 q qn ]
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401 | // [ 0 0 -1 0 ]
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402 | //
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403 | // A = 2 * near / (right - left)
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404 | // B = 2 * near / (top - bottom)
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405 | // C = (right + left) / (right - left)
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406 | // D = (top + bottom) / (top - bottom)
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407 | // q = - (far + near) / (far - near)
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408 | // qn = - 2 * (far * near) / (far - near)
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409 |
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410 | mProjMatrix = Matrix4::ZERO;
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411 | mProjMatrix[0][0] = A;
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412 | mProjMatrix[0][2] = C;
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413 | mProjMatrix[1][1] = B;
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414 | mProjMatrix[1][2] = D;
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415 | mProjMatrix[2][2] = q;
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416 | mProjMatrix[2][3] = qn;
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417 | mProjMatrix[3][2] = -1;
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418 |
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419 | if (mObliqueDepthProjection)
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420 | {
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421 | // Translate the plane into view space
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422 |
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423 | // Don't use getViewMatrix here, incase overrided by
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424 | // camera and return a cull frustum view matrix
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425 | updateView();
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426 | Plane plane = mViewMatrix * mObliqueProjPlane;
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427 |
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428 | // Thanks to Eric Lenyel for posting this calculation
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429 | // at www.terathon.com
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430 |
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431 | // Calculate the clip-space corner point opposite the
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432 | // clipping plane
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433 | // as (sgn(clipPlane.x), sgn(clipPlane.y), 1, 1) and
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434 | // transform it into camera space by multiplying it
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435 | // by the inverse of the projection matrix
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436 |
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437 | /* generalised version
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438 | Vector4 q = matrix.inverse() *
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439 | Vector4(Math::Sign(plane.normal.x),
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440 | Math::Sign(plane.normal.y), 1.0f, 1.0f);
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441 | */
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442 | Vector4 q;
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443 | q.x = (Math::Sign(plane.normal.x) + mProjMatrix[0][2]) / mProjMatrix[0][0];
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444 | q.y = (Math::Sign(plane.normal.y) + mProjMatrix[1][2]) / mProjMatrix[1][1];
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445 | q.z = -1;
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446 | q.w = (1 + mProjMatrix[2][2]) / mProjMatrix[2][3];
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447 |
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448 | // Calculate the scaled plane vector
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449 | Vector4 clipPlane4d(plane.normal.x, plane.normal.y, plane.normal.z, plane.d);
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450 | Vector4 c = clipPlane4d * (2 / (clipPlane4d.dotProduct(q)));
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451 |
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452 | // Replace the third row of the projection matrix
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453 | mProjMatrix[2][0] = c.x;
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454 | mProjMatrix[2][1] = c.y;
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455 | mProjMatrix[2][2] = c.z + 1;
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456 | mProjMatrix[2][3] = c.w;
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457 | }
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458 | } // perspective
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459 | else if (mProjType == PT_ORTHOGRAPHIC)
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460 | {
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461 | Real A = 2 * inv_w;
|
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462 | Real B = 2 * inv_h;
|
---|
463 | Real C = - (right + left) * inv_w;
|
---|
464 | Real D = - (top + bottom) * inv_h;
|
---|
465 | Real q, qn;
|
---|
466 | if (mFarDist == 0)
|
---|
467 | {
|
---|
468 | // Can not do infinite far plane here, avoid divided zero only
|
---|
469 | q = - Frustum::INFINITE_FAR_PLANE_ADJUST / mNearDist;
|
---|
470 | qn = - Frustum::INFINITE_FAR_PLANE_ADJUST - 1;
|
---|
471 | }
|
---|
472 | else
|
---|
473 | {
|
---|
474 | q = - 2 * inv_d;
|
---|
475 | qn = - (mFarDist + mNearDist) * inv_d;
|
---|
476 | }
|
---|
477 |
|
---|
478 | // NB: This creates 'uniform' orthographic projection matrix,
|
---|
479 | // which depth range [-1,1], right-handed rules
|
---|
480 | //
|
---|
481 | // [ A 0 0 C ]
|
---|
482 | // [ 0 B 0 D ]
|
---|
483 | // [ 0 0 q qn ]
|
---|
484 | // [ 0 0 0 1 ]
|
---|
485 | //
|
---|
486 | // A = 2 * / (right - left)
|
---|
487 | // B = 2 * / (top - bottom)
|
---|
488 | // C = - (right + left) / (right - left)
|
---|
489 | // D = - (top + bottom) / (top - bottom)
|
---|
490 | // q = - 2 / (far - near)
|
---|
491 | // qn = - (far + near) / (far - near)
|
---|
492 |
|
---|
493 | mProjMatrix = Matrix4::ZERO;
|
---|
494 | mProjMatrix[0][0] = A;
|
---|
495 | mProjMatrix[0][3] = C;
|
---|
496 | mProjMatrix[1][1] = B;
|
---|
497 | mProjMatrix[1][3] = D;
|
---|
498 | mProjMatrix[2][2] = q;
|
---|
499 | mProjMatrix[2][3] = qn;
|
---|
500 | mProjMatrix[3][3] = 1;
|
---|
501 | } // ortho
|
---|
502 | } // !mCustomProjMatrix
|
---|
503 |
|
---|
504 | RenderSystem* renderSystem = Root::getSingleton().getRenderSystem();
|
---|
505 | // API specific
|
---|
506 | renderSystem->_convertProjectionMatrix(mProjMatrix, mProjMatrixRS);
|
---|
507 | // API specific for Gpu Programs
|
---|
508 | renderSystem->_convertProjectionMatrix(mProjMatrix, mProjMatrixRSDepth, true);
|
---|
509 |
|
---|
510 |
|
---|
511 | // Calculate bounding box (local)
|
---|
512 | // Box is from 0, down -Z, max dimensions as determined from far plane
|
---|
513 | // If infinite view frustum just pick a far value
|
---|
514 | Real farDist = (mFarDist == 0) ? 100000 : mFarDist;
|
---|
515 | // Near plane bounds
|
---|
516 | Vector3 min(left, bottom, -farDist);
|
---|
517 | Vector3 max(right, top, 0);
|
---|
518 | if (mProjType == PT_PERSPECTIVE)
|
---|
519 | {
|
---|
520 | // Merge with far plane bounds
|
---|
521 | Real radio = farDist / mNearDist;
|
---|
522 | min.makeFloor(Vector3(left * radio, bottom * radio, -farDist));
|
---|
523 | max.makeCeil(Vector3(right * radio, top * radio, 0));
|
---|
524 | }
|
---|
525 | mBoundingBox.setExtents(min, max);
|
---|
526 |
|
---|
527 | mRecalcFrustum = false;
|
---|
528 |
|
---|
529 | // Signal to update frustum clipping planes
|
---|
530 | mRecalcFrustumPlanes = true;
|
---|
531 | }
|
---|
532 | //-----------------------------------------------------------------------
|
---|
533 | void Frustum::updateFrustum(void) const
|
---|
534 | {
|
---|
535 | if (isFrustumOutOfDate())
|
---|
536 | {
|
---|
537 | updateFrustumImpl();
|
---|
538 | }
|
---|
539 | }
|
---|
540 |
|
---|
541 | //-----------------------------------------------------------------------
|
---|
542 | void Frustum::updateVertexData(void) const
|
---|
543 | {
|
---|
544 | if (mRecalcVertexData)
|
---|
545 | {
|
---|
546 | if (mVertexData.vertexBufferBinding->getBufferCount() <= 0)
|
---|
547 | {
|
---|
548 | // Initialise vertex & index data
|
---|
549 | mVertexData.vertexDeclaration->addElement(0, 0, VET_FLOAT3, VES_POSITION);
|
---|
550 | mVertexData.vertexCount = 32;
|
---|
551 | mVertexData.vertexStart = 0;
|
---|
552 | mVertexData.vertexBufferBinding->setBinding( 0,
|
---|
553 | HardwareBufferManager::getSingleton().createVertexBuffer(
|
---|
554 | sizeof(float)*3, 32, HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY) );
|
---|
555 | }
|
---|
556 |
|
---|
557 | // Note: Even though we can dealing with general projection matrix here,
|
---|
558 | // but because it's incompatibly with infinite far plane, thus, we
|
---|
559 | // still need to working with projection parameters.
|
---|
560 |
|
---|
561 | // Calc near plane corners
|
---|
562 | Real vpLeft, vpRight, vpBottom, vpTop;
|
---|
563 | calcProjectionParameters(vpLeft, vpRight, vpBottom, vpTop);
|
---|
564 |
|
---|
565 | // Treat infinite fardist as some arbitrary far value
|
---|
566 | Real farDist = (mFarDist == 0) ? 100000 : mFarDist;
|
---|
567 |
|
---|
568 | // Calc far palne corners
|
---|
569 | Real radio = mProjType == PT_PERSPECTIVE ? farDist / mNearDist : 1;
|
---|
570 | Real farLeft = vpLeft * radio;
|
---|
571 | Real farRight = vpRight * radio;
|
---|
572 | Real farBottom = vpBottom * radio;
|
---|
573 | Real farTop = vpTop * radio;
|
---|
574 |
|
---|
575 | // Calculate vertex positions (local)
|
---|
576 | // 0 is the origin
|
---|
577 | // 1, 2, 3, 4 are the points on the near plane, top left first, clockwise
|
---|
578 | // 5, 6, 7, 8 are the points on the far plane, top left first, clockwise
|
---|
579 | HardwareVertexBufferSharedPtr vbuf = mVertexData.vertexBufferBinding->getBuffer(0);
|
---|
580 | float* pFloat = static_cast<float*>(vbuf->lock(HardwareBuffer::HBL_DISCARD));
|
---|
581 |
|
---|
582 | // near plane (remember frustum is going in -Z direction)
|
---|
583 | *pFloat++ = vpLeft; *pFloat++ = vpTop; *pFloat++ = -mNearDist;
|
---|
584 | *pFloat++ = vpRight; *pFloat++ = vpTop; *pFloat++ = -mNearDist;
|
---|
585 |
|
---|
586 | *pFloat++ = vpRight; *pFloat++ = vpTop; *pFloat++ = -mNearDist;
|
---|
587 | *pFloat++ = vpRight; *pFloat++ = vpBottom; *pFloat++ = -mNearDist;
|
---|
588 |
|
---|
589 | *pFloat++ = vpRight; *pFloat++ = vpBottom; *pFloat++ = -mNearDist;
|
---|
590 | *pFloat++ = vpLeft; *pFloat++ = vpBottom; *pFloat++ = -mNearDist;
|
---|
591 |
|
---|
592 | *pFloat++ = vpLeft; *pFloat++ = vpBottom; *pFloat++ = -mNearDist;
|
---|
593 | *pFloat++ = vpLeft; *pFloat++ = vpTop; *pFloat++ = -mNearDist;
|
---|
594 |
|
---|
595 | // far plane (remember frustum is going in -Z direction)
|
---|
596 | *pFloat++ = farLeft; *pFloat++ = farTop; *pFloat++ = -farDist;
|
---|
597 | *pFloat++ = farRight; *pFloat++ = farTop; *pFloat++ = -farDist;
|
---|
598 |
|
---|
599 | *pFloat++ = farRight; *pFloat++ = farTop; *pFloat++ = -farDist;
|
---|
600 | *pFloat++ = farRight; *pFloat++ = farBottom; *pFloat++ = -farDist;
|
---|
601 |
|
---|
602 | *pFloat++ = farRight; *pFloat++ = farBottom; *pFloat++ = -farDist;
|
---|
603 | *pFloat++ = farLeft; *pFloat++ = farBottom; *pFloat++ = -farDist;
|
---|
604 |
|
---|
605 | *pFloat++ = farLeft; *pFloat++ = farBottom; *pFloat++ = -farDist;
|
---|
606 | *pFloat++ = farLeft; *pFloat++ = farTop; *pFloat++ = -farDist;
|
---|
607 |
|
---|
608 | // Sides of the pyramid
|
---|
609 | *pFloat++ = 0.0f; *pFloat++ = 0.0f; *pFloat++ = 0.0f;
|
---|
610 | *pFloat++ = vpLeft; *pFloat++ = vpTop; *pFloat++ = -mNearDist;
|
---|
611 |
|
---|
612 | *pFloat++ = 0.0f; *pFloat++ = 0.0f; *pFloat++ = 0.0f;
|
---|
613 | *pFloat++ = vpRight; *pFloat++ = vpTop; *pFloat++ = -mNearDist;
|
---|
614 |
|
---|
615 | *pFloat++ = 0.0f; *pFloat++ = 0.0f; *pFloat++ = 0.0f;
|
---|
616 | *pFloat++ = vpRight; *pFloat++ = vpBottom; *pFloat++ = -mNearDist;
|
---|
617 |
|
---|
618 | *pFloat++ = 0.0f; *pFloat++ = 0.0f; *pFloat++ = 0.0f;
|
---|
619 | *pFloat++ = vpLeft; *pFloat++ = vpBottom; *pFloat++ = -mNearDist;
|
---|
620 |
|
---|
621 | // Sides of the box
|
---|
622 |
|
---|
623 | *pFloat++ = vpLeft; *pFloat++ = vpTop; *pFloat++ = -mNearDist;
|
---|
624 | *pFloat++ = farLeft; *pFloat++ = farTop; *pFloat++ = -farDist;
|
---|
625 |
|
---|
626 | *pFloat++ = vpRight; *pFloat++ = vpTop; *pFloat++ = -mNearDist;
|
---|
627 | *pFloat++ = farRight; *pFloat++ = farTop; *pFloat++ = -farDist;
|
---|
628 |
|
---|
629 | *pFloat++ = vpRight; *pFloat++ = vpBottom; *pFloat++ = -mNearDist;
|
---|
630 | *pFloat++ = farRight; *pFloat++ = farBottom; *pFloat++ = -farDist;
|
---|
631 |
|
---|
632 | *pFloat++ = vpLeft; *pFloat++ = vpBottom; *pFloat++ = -mNearDist;
|
---|
633 | *pFloat++ = farLeft; *pFloat++ = farBottom; *pFloat++ = -farDist;
|
---|
634 |
|
---|
635 |
|
---|
636 | vbuf->unlock();
|
---|
637 |
|
---|
638 | mRecalcVertexData = false;
|
---|
639 | }
|
---|
640 | }
|
---|
641 |
|
---|
642 | //-----------------------------------------------------------------------
|
---|
643 | bool Frustum::isViewOutOfDate(void) const
|
---|
644 | {
|
---|
645 | // Attached to node?
|
---|
646 | if (mParentNode)
|
---|
647 | {
|
---|
648 | if (mRecalcView ||
|
---|
649 | mParentNode->_getDerivedOrientation() != mLastParentOrientation ||
|
---|
650 | mParentNode->_getDerivedPosition() != mLastParentPosition)
|
---|
651 | {
|
---|
652 | // Ok, we're out of date with SceneNode we're attached to
|
---|
653 | mLastParentOrientation = mParentNode->_getDerivedOrientation();
|
---|
654 | mLastParentPosition = mParentNode->_getDerivedPosition();
|
---|
655 | mRecalcView = true;
|
---|
656 | }
|
---|
657 | }
|
---|
658 | // Deriving reflection from linked plane?
|
---|
659 | if (mLinkedReflectPlane &&
|
---|
660 | !(mLastLinkedReflectionPlane == mLinkedReflectPlane->_getDerivedPlane()))
|
---|
661 | {
|
---|
662 | mReflectPlane = mLinkedReflectPlane->_getDerivedPlane();
|
---|
663 | mReflectMatrix = Math::buildReflectionMatrix(mReflectPlane);
|
---|
664 | mLastLinkedReflectionPlane = mLinkedReflectPlane->_getDerivedPlane();
|
---|
665 | mRecalcView = true;
|
---|
666 | }
|
---|
667 |
|
---|
668 | return mRecalcView;
|
---|
669 | }
|
---|
670 |
|
---|
671 | //-----------------------------------------------------------------------
|
---|
672 | bool Frustum::isFrustumOutOfDate(void) const
|
---|
673 | {
|
---|
674 | // Deriving custom near plane from linked plane?
|
---|
675 | if (mObliqueDepthProjection)
|
---|
676 | {
|
---|
677 | // Out of date when view out of data since plane needs to be in view space
|
---|
678 | if (isViewOutOfDate())
|
---|
679 | {
|
---|
680 | mRecalcFrustum = true;
|
---|
681 | }
|
---|
682 | // Update derived plane
|
---|
683 | if (mLinkedObliqueProjPlane &&
|
---|
684 | !(mLastLinkedObliqueProjPlane == mLinkedObliqueProjPlane->_getDerivedPlane()))
|
---|
685 | {
|
---|
686 | mObliqueProjPlane = mLinkedObliqueProjPlane->_getDerivedPlane();
|
---|
687 | mLastLinkedObliqueProjPlane = mObliqueProjPlane;
|
---|
688 | mRecalcFrustum = true;
|
---|
689 | }
|
---|
690 | }
|
---|
691 |
|
---|
692 | return mRecalcFrustum;
|
---|
693 | }
|
---|
694 |
|
---|
695 | //-----------------------------------------------------------------------
|
---|
696 | void Frustum::updateViewImpl(void) const
|
---|
697 | {
|
---|
698 | // ----------------------
|
---|
699 | // Update the view matrix
|
---|
700 | // ----------------------
|
---|
701 |
|
---|
702 | // View matrix is:
|
---|
703 | //
|
---|
704 | // [ Lx Uy Dz Tx ]
|
---|
705 | // [ Lx Uy Dz Ty ]
|
---|
706 | // [ Lx Uy Dz Tz ]
|
---|
707 | // [ 0 0 0 1 ]
|
---|
708 | //
|
---|
709 | // Where T = -(Transposed(Rot) * Pos)
|
---|
710 |
|
---|
711 | // This is most efficiently done using 3x3 Matrices
|
---|
712 |
|
---|
713 | // Get orientation from quaternion
|
---|
714 |
|
---|
715 | if (!mCustomViewMatrix)
|
---|
716 | {
|
---|
717 | Matrix3 rot;
|
---|
718 | const Quaternion& orientation = getOrientationForViewUpdate();
|
---|
719 | const Vector3& position = getPositionForViewUpdate();
|
---|
720 | orientation.ToRotationMatrix(rot);
|
---|
721 |
|
---|
722 | // Make the translation relative to new axes
|
---|
723 | Matrix3 rotT = rot.Transpose();
|
---|
724 | Vector3 trans = -rotT * position;
|
---|
725 |
|
---|
726 | // Make final matrix
|
---|
727 | mViewMatrix = Matrix4::IDENTITY;
|
---|
728 | mViewMatrix = rotT; // fills upper 3x3
|
---|
729 | mViewMatrix[0][3] = trans.x;
|
---|
730 | mViewMatrix[1][3] = trans.y;
|
---|
731 | mViewMatrix[2][3] = trans.z;
|
---|
732 |
|
---|
733 | // Deal with reflections
|
---|
734 | if (mReflect)
|
---|
735 | {
|
---|
736 | mViewMatrix = mViewMatrix * mReflectMatrix;
|
---|
737 | }
|
---|
738 | }
|
---|
739 |
|
---|
740 | mRecalcView = false;
|
---|
741 |
|
---|
742 | // Signal to update frustum clipping planes
|
---|
743 | mRecalcFrustumPlanes = true;
|
---|
744 | // Signal to update world space corners
|
---|
745 | mRecalcWorldSpaceCorners = true;
|
---|
746 | // Signal to update frustum if oblique plane enabled,
|
---|
747 | // since plane needs to be in view space
|
---|
748 | if (mObliqueDepthProjection)
|
---|
749 | {
|
---|
750 | mRecalcFrustum = true;
|
---|
751 | }
|
---|
752 | }
|
---|
753 | //-----------------------------------------------------------------------
|
---|
754 | void Frustum::updateView(void) const
|
---|
755 | {
|
---|
756 | if (isViewOutOfDate())
|
---|
757 | {
|
---|
758 | updateViewImpl();
|
---|
759 | }
|
---|
760 | }
|
---|
761 |
|
---|
762 | //-----------------------------------------------------------------------
|
---|
763 | void Frustum::updateFrustumPlanesImpl(void) const
|
---|
764 | {
|
---|
765 | // -------------------------
|
---|
766 | // Update the frustum planes
|
---|
767 | // -------------------------
|
---|
768 | Matrix4 combo = mProjMatrix * mViewMatrix;
|
---|
769 |
|
---|
770 | mFrustumPlanes[FRUSTUM_PLANE_LEFT].normal.x = combo[3][0] + combo[0][0];
|
---|
771 | mFrustumPlanes[FRUSTUM_PLANE_LEFT].normal.y = combo[3][1] + combo[0][1];
|
---|
772 | mFrustumPlanes[FRUSTUM_PLANE_LEFT].normal.z = combo[3][2] + combo[0][2];
|
---|
773 | mFrustumPlanes[FRUSTUM_PLANE_LEFT].d = combo[3][3] + combo[0][3];
|
---|
774 |
|
---|
775 | mFrustumPlanes[FRUSTUM_PLANE_RIGHT].normal.x = combo[3][0] - combo[0][0];
|
---|
776 | mFrustumPlanes[FRUSTUM_PLANE_RIGHT].normal.y = combo[3][1] - combo[0][1];
|
---|
777 | mFrustumPlanes[FRUSTUM_PLANE_RIGHT].normal.z = combo[3][2] - combo[0][2];
|
---|
778 | mFrustumPlanes[FRUSTUM_PLANE_RIGHT].d = combo[3][3] - combo[0][3];
|
---|
779 |
|
---|
780 | mFrustumPlanes[FRUSTUM_PLANE_TOP].normal.x = combo[3][0] - combo[1][0];
|
---|
781 | mFrustumPlanes[FRUSTUM_PLANE_TOP].normal.y = combo[3][1] - combo[1][1];
|
---|
782 | mFrustumPlanes[FRUSTUM_PLANE_TOP].normal.z = combo[3][2] - combo[1][2];
|
---|
783 | mFrustumPlanes[FRUSTUM_PLANE_TOP].d = combo[3][3] - combo[1][3];
|
---|
784 |
|
---|
785 | mFrustumPlanes[FRUSTUM_PLANE_BOTTOM].normal.x = combo[3][0] + combo[1][0];
|
---|
786 | mFrustumPlanes[FRUSTUM_PLANE_BOTTOM].normal.y = combo[3][1] + combo[1][1];
|
---|
787 | mFrustumPlanes[FRUSTUM_PLANE_BOTTOM].normal.z = combo[3][2] + combo[1][2];
|
---|
788 | mFrustumPlanes[FRUSTUM_PLANE_BOTTOM].d = combo[3][3] + combo[1][3];
|
---|
789 |
|
---|
790 | mFrustumPlanes[FRUSTUM_PLANE_NEAR].normal.x = combo[3][0] + combo[2][0];
|
---|
791 | mFrustumPlanes[FRUSTUM_PLANE_NEAR].normal.y = combo[3][1] + combo[2][1];
|
---|
792 | mFrustumPlanes[FRUSTUM_PLANE_NEAR].normal.z = combo[3][2] + combo[2][2];
|
---|
793 | mFrustumPlanes[FRUSTUM_PLANE_NEAR].d = combo[3][3] + combo[2][3];
|
---|
794 |
|
---|
795 | mFrustumPlanes[FRUSTUM_PLANE_FAR].normal.x = combo[3][0] - combo[2][0];
|
---|
796 | mFrustumPlanes[FRUSTUM_PLANE_FAR].normal.y = combo[3][1] - combo[2][1];
|
---|
797 | mFrustumPlanes[FRUSTUM_PLANE_FAR].normal.z = combo[3][2] - combo[2][2];
|
---|
798 | mFrustumPlanes[FRUSTUM_PLANE_FAR].d = combo[3][3] - combo[2][3];
|
---|
799 |
|
---|
800 | // Renormalise any normals which were not unit length
|
---|
801 | for(int i=0; i<6; i++ )
|
---|
802 | {
|
---|
803 | float length = mFrustumPlanes[i].normal.normalise();
|
---|
804 | mFrustumPlanes[i].d /= length;
|
---|
805 | }
|
---|
806 |
|
---|
807 | mRecalcFrustumPlanes = false;
|
---|
808 | }
|
---|
809 | //-----------------------------------------------------------------------
|
---|
810 | void Frustum::updateFrustumPlanes(void) const
|
---|
811 | {
|
---|
812 | updateView();
|
---|
813 | updateFrustum();
|
---|
814 |
|
---|
815 | if (mRecalcFrustumPlanes)
|
---|
816 | {
|
---|
817 | updateFrustumPlanesImpl();
|
---|
818 | }
|
---|
819 | }
|
---|
820 | //-----------------------------------------------------------------------
|
---|
821 | void Frustum::updateWorldSpaceCornersImpl(void) const
|
---|
822 | {
|
---|
823 | Matrix4 eyeToWorld = mViewMatrix.inverse();
|
---|
824 |
|
---|
825 | // Note: Even though we can dealing with general projection matrix here,
|
---|
826 | // but because it's incompatibly with infinite far plane, thus, we
|
---|
827 | // still need to working with projection parameters.
|
---|
828 |
|
---|
829 | // Calc near plane corners
|
---|
830 | Real nearLeft, nearRight, nearBottom, nearTop;
|
---|
831 | calcProjectionParameters(nearLeft, nearRight, nearBottom, nearTop);
|
---|
832 |
|
---|
833 | // Treat infinite fardist as some arbitrary far value
|
---|
834 | Real farDist = (mFarDist == 0) ? 100000 : mFarDist;
|
---|
835 |
|
---|
836 | // Calc far palne corners
|
---|
837 | Real radio = mProjType == PT_PERSPECTIVE ? farDist / mNearDist : 1;
|
---|
838 | Real farLeft = nearLeft * radio;
|
---|
839 | Real farRight = nearRight * radio;
|
---|
840 | Real farBottom = nearBottom * radio;
|
---|
841 | Real farTop = nearTop * radio;
|
---|
842 |
|
---|
843 | // near
|
---|
844 | mWorldSpaceCorners[0] = eyeToWorld * Vector3(nearRight, nearTop, -mNearDist);
|
---|
845 | mWorldSpaceCorners[1] = eyeToWorld * Vector3(nearLeft, nearTop, -mNearDist);
|
---|
846 | mWorldSpaceCorners[2] = eyeToWorld * Vector3(nearLeft, nearBottom, -mNearDist);
|
---|
847 | mWorldSpaceCorners[3] = eyeToWorld * Vector3(nearRight, nearBottom, -mNearDist);
|
---|
848 | // far
|
---|
849 | mWorldSpaceCorners[4] = eyeToWorld * Vector3(farRight, farTop, -farDist);
|
---|
850 | mWorldSpaceCorners[5] = eyeToWorld * Vector3(farLeft, farTop, -farDist);
|
---|
851 | mWorldSpaceCorners[6] = eyeToWorld * Vector3(farLeft, farBottom, -farDist);
|
---|
852 | mWorldSpaceCorners[7] = eyeToWorld * Vector3(farRight, farBottom, -farDist);
|
---|
853 |
|
---|
854 |
|
---|
855 | mRecalcWorldSpaceCorners = false;
|
---|
856 | }
|
---|
857 | //-----------------------------------------------------------------------
|
---|
858 | void Frustum::updateWorldSpaceCorners(void) const
|
---|
859 | {
|
---|
860 | updateView();
|
---|
861 |
|
---|
862 | if (mRecalcWorldSpaceCorners)
|
---|
863 | {
|
---|
864 | updateWorldSpaceCornersImpl();
|
---|
865 | }
|
---|
866 |
|
---|
867 | }
|
---|
868 |
|
---|
869 | //-----------------------------------------------------------------------
|
---|
870 | Real Frustum::getAspectRatio(void) const
|
---|
871 | {
|
---|
872 | return mAspect;
|
---|
873 | }
|
---|
874 |
|
---|
875 | //-----------------------------------------------------------------------
|
---|
876 | void Frustum::setAspectRatio(Real r)
|
---|
877 | {
|
---|
878 | mAspect = r;
|
---|
879 | invalidateFrustum();
|
---|
880 | }
|
---|
881 |
|
---|
882 | //-----------------------------------------------------------------------
|
---|
883 | const AxisAlignedBox& Frustum::getBoundingBox(void) const
|
---|
884 | {
|
---|
885 | return mBoundingBox;
|
---|
886 | }
|
---|
887 | //-----------------------------------------------------------------------
|
---|
888 | void Frustum::_updateRenderQueue(RenderQueue* queue)
|
---|
889 | {
|
---|
890 | // Add self
|
---|
891 | queue->addRenderable(this);
|
---|
892 | }
|
---|
893 | //-----------------------------------------------------------------------
|
---|
894 | const String& Frustum::getMovableType(void) const
|
---|
895 | {
|
---|
896 | return msMovableType;
|
---|
897 | }
|
---|
898 | //-----------------------------------------------------------------------
|
---|
899 | Real Frustum::getBoundingRadius(void) const
|
---|
900 | {
|
---|
901 | return (mFarDist == 0)? 100000 : mFarDist;
|
---|
902 | }
|
---|
903 | //-----------------------------------------------------------------------
|
---|
904 | const MaterialPtr& Frustum::getMaterial(void) const
|
---|
905 | {
|
---|
906 | return mMaterial;
|
---|
907 | }
|
---|
908 | //-----------------------------------------------------------------------
|
---|
909 | void Frustum::getRenderOperation(RenderOperation& op)
|
---|
910 | {
|
---|
911 | updateVertexData();
|
---|
912 | op.operationType = RenderOperation::OT_LINE_LIST;
|
---|
913 | op.useIndexes = false;
|
---|
914 | op.vertexData = &mVertexData;
|
---|
915 | }
|
---|
916 | //-----------------------------------------------------------------------
|
---|
917 | void Frustum::getWorldTransforms(Matrix4* xform) const
|
---|
918 | {
|
---|
919 | if (mParentNode)
|
---|
920 | mParentNode->getWorldTransforms(xform);
|
---|
921 | }
|
---|
922 | //-----------------------------------------------------------------------
|
---|
923 | const Quaternion& Frustum::getWorldOrientation(void) const
|
---|
924 | {
|
---|
925 | if (mParentNode)
|
---|
926 | return mParentNode->_getDerivedOrientation();
|
---|
927 | else
|
---|
928 | return Quaternion::IDENTITY;
|
---|
929 | }
|
---|
930 | //-----------------------------------------------------------------------
|
---|
931 | const Vector3& Frustum::getWorldPosition(void) const
|
---|
932 | {
|
---|
933 | if (mParentNode)
|
---|
934 | return mParentNode->_getDerivedPosition();
|
---|
935 | else
|
---|
936 | return Vector3::ZERO;
|
---|
937 | }
|
---|
938 | //-----------------------------------------------------------------------
|
---|
939 | Real Frustum::getSquaredViewDepth(const Camera* cam) const
|
---|
940 | {
|
---|
941 | // Calc from centre
|
---|
942 | if (mParentNode)
|
---|
943 | return (cam->getDerivedPosition()
|
---|
944 | - mParentNode->_getDerivedPosition()).squaredLength();
|
---|
945 | else
|
---|
946 | return 0;
|
---|
947 | }
|
---|
948 | //-----------------------------------------------------------------------
|
---|
949 | const LightList& Frustum::getLights(void) const
|
---|
950 | {
|
---|
951 | // N/A
|
---|
952 | static LightList ll;
|
---|
953 | return ll;
|
---|
954 | }
|
---|
955 | //-----------------------------------------------------------------------
|
---|
956 | void Frustum::_notifyCurrentCamera(Camera* cam)
|
---|
957 | {
|
---|
958 | // Make sure bounding box up-to-date
|
---|
959 | updateFrustum();
|
---|
960 |
|
---|
961 | MovableObject::_notifyCurrentCamera(cam);
|
---|
962 | }
|
---|
963 |
|
---|
964 | // -------------------------------------------------------------------
|
---|
965 | void Frustum::invalidateFrustum() const
|
---|
966 | {
|
---|
967 | mRecalcFrustum = true;
|
---|
968 | mRecalcFrustumPlanes = true;
|
---|
969 | mRecalcWorldSpaceCorners = true;
|
---|
970 | mRecalcVertexData = true;
|
---|
971 | }
|
---|
972 | // -------------------------------------------------------------------
|
---|
973 | void Frustum::invalidateView() const
|
---|
974 | {
|
---|
975 | mRecalcView = true;
|
---|
976 | mRecalcFrustumPlanes = true;
|
---|
977 | mRecalcWorldSpaceCorners = true;
|
---|
978 | }
|
---|
979 | // -------------------------------------------------------------------
|
---|
980 | const Vector3* Frustum::getWorldSpaceCorners(void) const
|
---|
981 | {
|
---|
982 | updateWorldSpaceCorners();
|
---|
983 |
|
---|
984 | return mWorldSpaceCorners;
|
---|
985 | }
|
---|
986 | //-----------------------------------------------------------------------
|
---|
987 | void Frustum::setProjectionType(ProjectionType pt)
|
---|
988 | {
|
---|
989 | mProjType = pt;
|
---|
990 | invalidateFrustum();
|
---|
991 | }
|
---|
992 |
|
---|
993 | //-----------------------------------------------------------------------
|
---|
994 | ProjectionType Frustum::getProjectionType(void) const
|
---|
995 | {
|
---|
996 | return mProjType;
|
---|
997 | }
|
---|
998 | //-----------------------------------------------------------------------
|
---|
999 | const Vector3& Frustum::getPositionForViewUpdate(void) const
|
---|
1000 | {
|
---|
1001 | return mLastParentPosition;
|
---|
1002 | }
|
---|
1003 | //-----------------------------------------------------------------------
|
---|
1004 | const Quaternion& Frustum::getOrientationForViewUpdate(void) const
|
---|
1005 | {
|
---|
1006 | return mLastParentOrientation;
|
---|
1007 | }
|
---|
1008 | //-----------------------------------------------------------------------
|
---|
1009 | void Frustum::enableReflection(const Plane& p)
|
---|
1010 | {
|
---|
1011 | mReflect = true;
|
---|
1012 | mReflectPlane = p;
|
---|
1013 | mLinkedReflectPlane = 0;
|
---|
1014 | mReflectMatrix = Math::buildReflectionMatrix(p);
|
---|
1015 | invalidateView();
|
---|
1016 |
|
---|
1017 | }
|
---|
1018 | //-----------------------------------------------------------------------
|
---|
1019 | void Frustum::enableReflection(const MovablePlane* p)
|
---|
1020 | {
|
---|
1021 | mReflect = true;
|
---|
1022 | mLinkedReflectPlane = p;
|
---|
1023 | mReflectPlane = mLinkedReflectPlane->_getDerivedPlane();
|
---|
1024 | mReflectMatrix = Math::buildReflectionMatrix(mReflectPlane);
|
---|
1025 | mLastLinkedReflectionPlane = mLinkedReflectPlane->_getDerivedPlane();
|
---|
1026 | invalidateView();
|
---|
1027 | }
|
---|
1028 | //-----------------------------------------------------------------------
|
---|
1029 | void Frustum::disableReflection(void)
|
---|
1030 | {
|
---|
1031 | mReflect = false;
|
---|
1032 | mLinkedReflectPlane = 0;
|
---|
1033 | mLastLinkedReflectionPlane.normal = Vector3::ZERO;
|
---|
1034 | invalidateView();
|
---|
1035 | }
|
---|
1036 | //---------------------------------------------------------------------
|
---|
1037 | bool Frustum::projectSphere(const Sphere& sphere,
|
---|
1038 | Real* left, Real* top, Real* right, Real* bottom) const
|
---|
1039 | {
|
---|
1040 | // initialise
|
---|
1041 | *left = *bottom = -1.0f;
|
---|
1042 | *right = *top = 1.0f;
|
---|
1043 |
|
---|
1044 | // Transform light position into camera space
|
---|
1045 |
|
---|
1046 | // Don't use getViewMatrix here, incase overrided by camera and return a cull frustum view matrix
|
---|
1047 | updateView();
|
---|
1048 | Vector3 eyeSpacePos = mViewMatrix * sphere.getCenter();
|
---|
1049 |
|
---|
1050 | if (eyeSpacePos.z < 0)
|
---|
1051 | {
|
---|
1052 | Real r = sphere.getRadius();
|
---|
1053 | // early-exit
|
---|
1054 | if (eyeSpacePos.squaredLength() <= r * r)
|
---|
1055 | return false;
|
---|
1056 |
|
---|
1057 | updateFrustum();
|
---|
1058 | Vector3 screenSpacePos = mProjMatrix * eyeSpacePos;
|
---|
1059 |
|
---|
1060 |
|
---|
1061 | // perspective attenuate
|
---|
1062 | Vector3 spheresize(r, r, eyeSpacePos.z);
|
---|
1063 | spheresize = mProjMatrix * spheresize;
|
---|
1064 |
|
---|
1065 | Real possLeft = screenSpacePos.x - spheresize.x;
|
---|
1066 | Real possRight = screenSpacePos.x + spheresize.x;
|
---|
1067 | Real possTop = screenSpacePos.y + spheresize.y;
|
---|
1068 | Real possBottom = screenSpacePos.y - spheresize.y;
|
---|
1069 |
|
---|
1070 | *left = std::max(static_cast<Real>(-1.0), possLeft);
|
---|
1071 | *right = std::min(static_cast<Real>(1.0), possRight);
|
---|
1072 | *top = std::min(static_cast<Real>(1.0), possTop);
|
---|
1073 | *bottom = std::max(static_cast<Real>(-1.0), possBottom);
|
---|
1074 |
|
---|
1075 | }
|
---|
1076 |
|
---|
1077 | return (*left != -1.0f) || (*top != 1.0f) || (*right != 1.0f) || (*bottom != -1.0f);
|
---|
1078 |
|
---|
1079 | }
|
---|
1080 | //---------------------------------------------------------------------
|
---|
1081 | void Frustum::enableCustomNearClipPlane(const MovablePlane* plane)
|
---|
1082 | {
|
---|
1083 | mObliqueDepthProjection = true;
|
---|
1084 | mLinkedObliqueProjPlane = plane;
|
---|
1085 | mObliqueProjPlane = plane->_getDerivedPlane();
|
---|
1086 | invalidateFrustum();
|
---|
1087 | }
|
---|
1088 | //---------------------------------------------------------------------
|
---|
1089 | void Frustum::enableCustomNearClipPlane(const Plane& plane)
|
---|
1090 | {
|
---|
1091 | mObliqueDepthProjection = true;
|
---|
1092 | mLinkedObliqueProjPlane = 0;
|
---|
1093 | mObliqueProjPlane = plane;
|
---|
1094 | invalidateFrustum();
|
---|
1095 | }
|
---|
1096 | //---------------------------------------------------------------------
|
---|
1097 | void Frustum::disableCustomNearClipPlane(void)
|
---|
1098 | {
|
---|
1099 | mObliqueDepthProjection = false;
|
---|
1100 | mLinkedObliqueProjPlane = 0;
|
---|
1101 | invalidateFrustum();
|
---|
1102 | }
|
---|
1103 | //---------------------------------------------------------------------
|
---|
1104 | void Frustum::setCustomViewMatrix(bool enable, const Matrix4& viewMatrix)
|
---|
1105 | {
|
---|
1106 | mCustomViewMatrix = enable;
|
---|
1107 | if (enable)
|
---|
1108 | {
|
---|
1109 | mViewMatrix = viewMatrix;
|
---|
1110 | }
|
---|
1111 | invalidateView();
|
---|
1112 | }
|
---|
1113 | //---------------------------------------------------------------------
|
---|
1114 | void Frustum::setCustomProjectionMatrix(bool enable, const Matrix4& projMatrix)
|
---|
1115 | {
|
---|
1116 | mCustomProjMatrix = enable;
|
---|
1117 | if (enable)
|
---|
1118 | {
|
---|
1119 | mProjMatrix = projMatrix;
|
---|
1120 | }
|
---|
1121 | invalidateFrustum();
|
---|
1122 | }
|
---|
1123 |
|
---|
1124 |
|
---|
1125 |
|
---|
1126 | } // namespace Ogre
|
---|