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added getRotationAngle from rotation matrix

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matthias.ringwald 2010-06-13 19:26:30 +00:00
parent fc5ceb98a9
commit 122fb60270
1 changed files with 4 additions and 0 deletions
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4
example/WiiMoteOpenGLDemo/rotation.c
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@ -154,6 +154,10 @@ void getRotationMatrixFromVectors(float vin[3], float vout[3], float matrix[4][4
getRotationMatrixFromQuartenion(q,matrix);
}
void getRotationAngle(float matrix[4][4], float angle){
angle = acos( (matrix[0][0]+matrix[1][1]+matrix[2][2]-1) * 0.5);
}
#if 0
int main(void)
{