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Diffstat (limited to 'src/Frustum.cpp')
| -rw-r--r-- | src/Frustum.cpp | 241 |
1 files changed, 0 insertions, 241 deletions
diff --git a/src/Frustum.cpp b/src/Frustum.cpp deleted file mode 100644 index 3611a06..0000000 --- a/src/Frustum.cpp +++ /dev/null @@ -1,241 +0,0 @@ -#include <cmath> -#include <GL/gl.h> - -#include "Frustum.h" - -void FRUSTUM:: - GetFrustum() { - float projmatrix[16]; - float mvmatrix[16]; - float clip[16]; - float t; - - glGetFloatv(GL_PROJECTION_MATRIX, projmatrix); - glGetFloatv(GL_MODELVIEW_MATRIX, mvmatrix); - - // Combine the matrices - clip[0] = mvmatrix[0] * projmatrix[0] + mvmatrix[1] * projmatrix[4] + mvmatrix[2] * projmatrix[8] + mvmatrix[3] * projmatrix[12]; - clip[1] = mvmatrix[0] * projmatrix[1] + mvmatrix[1] * projmatrix[5] + mvmatrix[2] * projmatrix[9] + mvmatrix[3] * projmatrix[13]; - clip[2] = mvmatrix[0] * projmatrix[2] + mvmatrix[1] * projmatrix[6] + mvmatrix[2] * projmatrix[10] + mvmatrix[3] * projmatrix[14]; - clip[3] = mvmatrix[0] * projmatrix[3] + mvmatrix[1] * projmatrix[7] + mvmatrix[2] * projmatrix[11] + mvmatrix[3] * projmatrix[15]; - - clip[4] = mvmatrix[4] * projmatrix[0] + mvmatrix[5] * projmatrix[4] + mvmatrix[6] * projmatrix[8] + mvmatrix[7] * projmatrix[12]; - clip[5] = mvmatrix[4] * projmatrix[1] + mvmatrix[5] * projmatrix[5] + mvmatrix[6] * projmatrix[9] + mvmatrix[7] * projmatrix[13]; - clip[6] = mvmatrix[4] * projmatrix[2] + mvmatrix[5] * projmatrix[6] + mvmatrix[6] * projmatrix[10] + mvmatrix[7] * projmatrix[14]; - clip[7] = mvmatrix[4] * projmatrix[3] + mvmatrix[5] * projmatrix[7] + mvmatrix[6] * projmatrix[11] + mvmatrix[7] * projmatrix[15]; - - clip[8] = mvmatrix[8] * projmatrix[0] + mvmatrix[9] * projmatrix[4] + mvmatrix[10] * projmatrix[8] + mvmatrix[11] * projmatrix[12]; - clip[9] = mvmatrix[8] * projmatrix[1] + mvmatrix[9] * projmatrix[5] + mvmatrix[10] * projmatrix[9] + mvmatrix[11] * projmatrix[13]; - clip[10] = mvmatrix[8] * projmatrix[2] + mvmatrix[9] * projmatrix[6] + mvmatrix[10] * projmatrix[10] + mvmatrix[11] * projmatrix[14]; - clip[11] = mvmatrix[8] * projmatrix[3] + mvmatrix[9] * projmatrix[7] + mvmatrix[10] * projmatrix[11] + mvmatrix[11] * projmatrix[15]; - - clip[12] = mvmatrix[12] * projmatrix[0] + mvmatrix[13] * projmatrix[4] + mvmatrix[14] * projmatrix[8] + mvmatrix[15] * projmatrix[12]; - clip[13] = mvmatrix[12] * projmatrix[1] + mvmatrix[13] * projmatrix[5] + mvmatrix[14] * projmatrix[9] + mvmatrix[15] * projmatrix[13]; - clip[14] = mvmatrix[12] * projmatrix[2] + mvmatrix[13] * projmatrix[6] + mvmatrix[14] * projmatrix[10] + mvmatrix[15] * projmatrix[14]; - clip[15] = mvmatrix[12] * projmatrix[3] + mvmatrix[13] * projmatrix[7] + mvmatrix[14] * projmatrix[11] + mvmatrix[15] * projmatrix[15]; - - // Right plane - frustum[0][0] = clip[3] - clip[0]; - frustum[0][1] = clip[7] - clip[4]; - frustum[0][2] = clip[11] - clip[8]; - frustum[0][3] = clip[15] - clip[12]; - - // Left plane - frustum[1][0] = clip[3] + clip[0]; - frustum[1][1] = clip[7] + clip[4]; - frustum[1][2] = clip[11] + clip[8]; - frustum[1][3] = clip[15] + clip[12]; - - // Bottom plane - frustum[2][0] = clip[3] + clip[1]; - frustum[2][1] = clip[7] + clip[5]; - frustum[2][2] = clip[11] + clip[9]; - frustum[2][3] = clip[15] + clip[13]; - - // Top plane - frustum[3][0] = clip[3] - clip[1]; - frustum[3][1] = clip[7] - clip[5]; - frustum[3][2] = clip[11] - clip[9]; - frustum[3][3] = clip[15] - clip[13]; - - // Far plane - frustum[4][0] = clip[3] - clip[2]; - frustum[4][1] = clip[7] - clip[6]; - frustum[4][2] = clip[11] - clip[10]; - frustum[4][3] = clip[15] - clip[14]; - - // Near plane - frustum[5][0] = clip[3] + clip[2]; - frustum[5][1] = clip[7] + clip[6]; - frustum[5][2] = clip[11] + clip[10]; - frustum[5][3] = clip[15] + clip[14]; - - /* normalize the right plane */ - t = sqrtf(frustum[0][0]*frustum[0][0] - + frustum[0][1]*frustum[0][1] - + frustum[0][2]*frustum[0][2]); - frustum[0][0] /= t; - frustum[0][1] /= t; - frustum[0][2] /= t; - frustum[0][3] /= t; - - /* calculate left plane */ - frustum[1][0] = clip[ 3] + clip[ 0]; - frustum[1][1] = clip[ 7] + clip[ 4]; - frustum[1][2] = clip[11] + clip[ 8]; - frustum[1][3] = clip[15] + clip[12]; - - /* normalize the left plane */ - t = sqrtf(frustum[1][0]*frustum[1][0] - + frustum[1][1]*frustum[1][1] - + frustum[1][2]*frustum[1][2]); - frustum[1][0] /= t; - frustum[1][1] /= t; - frustum[1][2] /= t; - frustum[1][3] /= t; - - /* calculate the bottom plane */ - frustum[2][0] = clip[ 3] + clip[ 1]; - frustum[2][1] = clip[ 7] + clip[ 5]; - frustum[2][2] = clip[11] + clip[ 9]; - frustum[2][3] = clip[15] + clip[13]; - - /* normalize the bottom plane */ - t = sqrtf(frustum[2][0]*frustum[2][0] - + frustum[2][1]*frustum[2][1] - + frustum[2][2]*frustum[2][2]); - frustum[2][0] /= t; - frustum[2][1] /= t; - frustum[2][2] /= t; - frustum[2][3] /= t; - - /* calculate the top plane */ - frustum[3][0] = clip[ 3] - clip[ 1]; - frustum[3][1] = clip[ 7] - clip[ 5]; - frustum[3][2] = clip[11] - clip[ 9]; - frustum[3][3] = clip[15] - clip[13]; - - /* normalize the top plane */ - t = sqrtf(frustum[3][0]*frustum[3][0] - + frustum[3][1]*frustum[3][1] - + frustum[3][2]*frustum[3][2]); - frustum[3][0] /= t; - frustum[3][1] /= t; - frustum[3][2] /= t; - frustum[3][3] /= t; - - /* calculate the far plane */ - frustum[4][0] = clip[ 3] - clip[ 2]; - frustum[4][1] = clip[ 7] - clip[ 6]; - frustum[4][2] = clip[11] - clip[10]; - frustum[4][3] = clip[15] - clip[14]; - - /* normalize the far plane */ - t = sqrtf(frustum[4][0]*frustum[4][0] - + frustum[4][1]*frustum[4][1] - + frustum[4][2]*frustum[4][2]); - frustum[4][0] /= t; - frustum[4][1] /= t; - frustum[4][2] /= t; - frustum[4][3] /= t; - - /* calculate the near plane */ - frustum[5][0] = clip[ 3] + clip[ 2]; - frustum[5][1] = clip[ 7] + clip[ 6]; - frustum[5][2] = clip[11] + clip[10]; - frustum[5][3] = clip[15] + clip[14]; - - /* normalize the near plane */ - t = sqrtf(frustum[5][0]*frustum[5][0] - + frustum[5][1]*frustum[5][1] - + frustum[5][2]*frustum[5][2]); - frustum[5][0] /= t; - frustum[5][1] /= t; - frustum[5][2] /= t; - frustum[5][3] /= t; -} - -int FRUSTUM:: - CubeInFrustum(float x, float y, float z, float size) { - int c, c2; - - c2 = 0; - for(int i=0; i<6; i++) { - c=0; - if(frustum[i][0] * (x-size) + frustum[i][1] * (y-size) + frustum[i][2] * (z-size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x+size) + frustum[i][1] * (y-size) + frustum[i][2] * (z-size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x-size) + frustum[i][1] * (y+size) + frustum[i][2] * (z-size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x+size) + frustum[i][1] * (y+size) + frustum[i][2] * (z-size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x-size) + frustum[i][1] * (y-size) + frustum[i][2] * (z+size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x+size) + frustum[i][1] * (y-size) + frustum[i][2] * (z+size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x-size) + frustum[i][1] * (y+size) + frustum[i][2] * (z+size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x+size) + frustum[i][1] * (y+size) + frustum[i][2] * (z+size) + frustum[i][3] > 0) - c++; - if(c==0) - return 0; - if(c==8) - c2++; - } - if(c2>=6) - return 2; - else - return 1; -} - -int FRUSTUM:: - CubeInFrustum(float x, float y, float z, float size, float height) { - int c, c2; - - c2 = 0; - for(int i=0; i<6; i++) { - c=0; - if(frustum[i][0] * (x-size) + frustum[i][1] * (y-height) + frustum[i][2] * (z-size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x+size) + frustum[i][1] * (y-height) + frustum[i][2] * (z-size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x-size) + frustum[i][1] * (y+height) + frustum[i][2] * (z-size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x+size) + frustum[i][1] * (y+height) + frustum[i][2] * (z-size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x-size) + frustum[i][1] * (y-height) + frustum[i][2] * (z+size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x+size) + frustum[i][1] * (y-height) + frustum[i][2] * (z+size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x-size) + frustum[i][1] * (y+height) + frustum[i][2] * (z+size) + frustum[i][3] > 0) - c++; - if(frustum[i][0] * (x+size) + frustum[i][1] * (y+height) + frustum[i][2] * (z+size) + frustum[i][3] > 0) - c++; - if(c==0) - return 0; - if(c==8) - c2++; - } - if(c2>=6) - return 2; - else - return 1; -} - -int FRUSTUM:: - SphereInFrustum(float x, float y, float z, float radius) { - int c2; - - c2 = 0; - for(int i=0; i<6; i++) { - if(frustum[i][0] * x + frustum[i][1] * y + frustum[i][2] * z + frustum[i][3] > -1*radius) - c2++; - else - return 0; - } - if(c2>=6) - return 2; - else - return 1; -} |