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add guMatrixScale()

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This commit is contained in:
Josh Holtrop 2011-05-09 16:45:07 -04:00
parent e76503001e
commit 9ad00aee7f
2 changed files with 13 additions and 0 deletions
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12
glslUtil/glslUtil.c
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@ -46,6 +46,18 @@ void guMatrixTranslate(guMatrix4x4 *m, float x, float y, float z)
} }
} }
void guMatrixScale(guMatrix4x4 *m, float x, float y, float z)
{
int i;
for (i = 0; i < 4; i++)
{
float *base = &(*m)[i][0];
base[0] *= x;
base[1] *= y;
base[2] *= z;
}
}
void guMatrixFrustum(guMatrix4x4 *m, void guMatrixFrustum(guMatrix4x4 *m,
float left, float right, float left, float right,
float bottom, float top, float bottom, float top,

1
glslUtil/glslUtil.h
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@ -17,6 +17,7 @@ extern "C" {
void guMatrixLoadIdentity(guMatrix4x4 *m); void guMatrixLoadIdentity(guMatrix4x4 *m);
void guMatrixMult(guMatrix4x4 *m, guMatrix4x4 *a, guMatrix4x4 *b); void guMatrixMult(guMatrix4x4 *m, guMatrix4x4 *a, guMatrix4x4 *b);
void guMatrixTranslate(guMatrix4x4 *m, float x, float y, float z); void guMatrixTranslate(guMatrix4x4 *m, float x, float y, float z);
void guMatrixScale(guMatrix4x4 *m, float x, float y, float z);
void guMatrixFrustum(guMatrix4x4 *m, void guMatrixFrustum(guMatrix4x4 *m,
float left, float right, float left, float right,
float bottom, float top, float bottom, float top,