1 | #include "SceneEntity.h"
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2 | #include "Geometry.h"
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3 | #include "Material.h"
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4 | #include "RenderState.h"
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5 | #include "Shape.h"
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6 | #include "Transform3.h"
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7 | #include "Camera.h"
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8 |
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9 | #include "glInterface.h"
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10 | #include <Cg/cg.h>
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11 | #include <Cg/cgGL.h>
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12 |
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13 |
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14 | using namespace std;
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15 |
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16 |
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17 | namespace CHCDemoEngine
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18 | {
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19 |
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20 |
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21 | SceneEntity::SceneEntity(Transform3 *trafo):
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22 | mTransform(trafo), mCurrentLODLevel(0)
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23 | {
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24 | mBox.Initialize();
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25 | }
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26 |
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27 |
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28 | SceneEntity::~SceneEntity()
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29 | {
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30 | }
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31 |
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32 |
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33 | void SceneEntity::UpdateLODs(Camera *cam)
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34 | {
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35 | const Vector3 pos = GetTransformedBoundingBox().Center();
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36 |
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37 | const float distance = SqrDistance(pos, cam->GetPosition());
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38 |
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39 | mCurrentLODLevel = 0;
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40 |
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41 | int l = (int)mLODLevels.size();
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42 |
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43 | for (int i = 0; i < l; ++ i)
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44 | {
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45 | LODLevel *lod = mLODLevels[i];
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46 |
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47 | if (lod->mSquaredDistance > distance)
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48 | break;
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49 |
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50 | mCurrentLODLevel = i;
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51 | }
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52 |
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53 | /*if (mLODLevels.size() > 1)
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54 | {
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55 | Debug << "dist: " << distance << " numshapes: " << mLODLevels[mCurrentLODLevel]->mShapes.size() << " lod: " << mCurrentLODLevel << " of " << mLODLevels.size() << endl;
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56 | }*/
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57 | }
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58 |
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59 | void SceneEntity::GetCurrentLODLevel(ShapeContainer::iterator &start,
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60 | ShapeContainer::iterator &end)
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61 | {
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62 | start = mLODLevels[mCurrentLODLevel]->mShapes.begin();
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63 | end = mLODLevels[mCurrentLODLevel]->mShapes.end();
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64 | }
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65 |
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66 |
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67 | void SceneEntity::GetLODLevel(int level,
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68 | ShapeContainer::iterator &start,
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69 | ShapeContainer::iterator &end)
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70 | {
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71 | LODLevel *lod = mLODLevels[level];
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72 |
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73 | start = lod->mShapes.begin();
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74 | end = lod->mShapes.end();
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75 | }
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76 |
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77 |
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78 | void SceneEntity::Render(RenderState *state)
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79 | {
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80 | ShapeContainer::iterator sit, sit_end;
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81 |
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82 | /*if (mShapes.size() > 8)
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83 | {
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84 | sit = mShapes.begin() + 6;
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85 | sit_end = mShapes.begin() + 6;
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86 | }
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87 | else*/
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88 | GetCurrentLODLevel(sit, sit_end);
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89 |
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90 | //if (mShapes.size() > 1)
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91 | //mShapes[0]->Render(state);
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92 | for (; sit != sit_end; ++ sit)
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93 | {
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94 | (*sit)->Render(state);
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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 | void SceneEntity::AddShape(Shape *shape)
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100 | {
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101 | mShapes.push_back(shape);
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102 | mBox.Include(shape->GetBoundingBox());
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103 | }
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104 |
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105 |
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106 | void SceneEntity::SetTransform(Transform3 *trafo)
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107 | {
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108 | mTransform = trafo;
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109 | }
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110 |
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111 |
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112 | void SceneEntity::SetLastRendered(int lastRendered)
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113 | {
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114 | mLastRendered = lastRendered;
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115 | }
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116 |
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117 |
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118 | int SceneEntity::GetLastRendered() const
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119 | {
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120 | return mLastRendered;
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121 | }
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122 |
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123 |
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124 | int SceneEntity::CountNumTriangles(int lodLevel)
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125 | {
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126 | int numTriangles = 0;
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127 |
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128 | ShapeContainer::iterator sit, sit_end;
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129 |
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130 | if (lodLevel == -1)
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131 | {
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132 | GetCurrentLODLevel(sit, sit_end);
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133 | }
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134 | else
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135 | {
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136 | GetLODLevel(lodLevel, sit, sit_end);
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137 | }
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138 |
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139 |
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140 | for (; sit != sit_end; ++ sit)
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141 | {
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142 | numTriangles += (*sit)->GetGeometry()->GetNumTriangles();
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143 | }
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144 |
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145 | return numTriangles;
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146 | }
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147 |
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148 |
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149 | AxisAlignedBox3 SceneEntity::GetTransformedBoundingBox() const
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150 | {
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151 | Matrix4x4 *mat = mTransform->GetMatrix();
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152 |
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153 | if (!mat)
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154 | return mBox;
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155 |
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156 | return Transform(mBox, *mat);
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157 | }
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158 |
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159 |
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160 | AxisAlignedBox3 SceneEntity::GetBoundingBox() const
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161 | {
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162 | return mBox;
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163 | }
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164 |
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165 | } |
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