Compute the heights of the height field
| 148 | |
| 149 | // Compute the heights of the height field |
| 150 | void HeightField::generateHeightField() { |
| 151 | |
| 152 | double persistence = 9; |
| 153 | double frequency = 0.28; |
| 154 | double amplitude = 12; |
| 155 | int octaves = 1; |
| 156 | int randomseed = 23; |
| 157 | PerlinNoise perlinNoise(persistence, frequency, amplitude, octaves, randomseed); |
| 158 | |
| 159 | mMinHeight = 0; |
| 160 | mMaxHeight = 0; |
| 161 | |
| 162 | float width = (NB_POINTS_WIDTH - 1); |
| 163 | float length = (NB_POINTS_LENGTH - 1); |
| 164 | |
| 165 | for (int i=0; i<NB_POINTS_WIDTH; i++) { |
| 166 | for (int j=0; j<NB_POINTS_LENGTH; j++) { |
| 167 | |
| 168 | int arrayIndex = j * NB_POINTS_WIDTH + i; |
| 169 | |
| 170 | mHeightData[arrayIndex] = (float)(perlinNoise.GetHeight(-width * 0.5 + i, -length * 0.5 + j)); |
| 171 | |
| 172 | if (i==0 && j==0) { |
| 173 | mMinHeight = mHeightData[arrayIndex] ; |
| 174 | mMaxHeight = mHeightData[arrayIndex] ; |
| 175 | } |
| 176 | |
| 177 | if (mHeightData[arrayIndex] > mMaxHeight) mMaxHeight = mHeightData[arrayIndex] ; |
| 178 | if (mHeightData[arrayIndex] < mMinHeight) mMinHeight = mHeightData[arrayIndex] ; |
| 179 | } |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | // Generate the graphics mesh to render the height field |
| 184 | void HeightField::generateGraphicsMesh() { |