diff options
Diffstat (limited to 'Source/Frustum.cpp')
| -rw-r--r-- | Source/Frustum.cpp | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/Source/Frustum.cpp b/Source/Frustum.cpp index 1b8a4e8..62c5271 100644 --- a/Source/Frustum.cpp +++ b/Source/Frustum.cpp @@ -73,6 +73,91 @@ void FRUSTUM:: 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 = sqrt(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 = sqrt(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 = sqrt(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 = sqrt(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 = sqrt(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 = sqrt(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:: |