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optimized MatrixLookAt (#1442)

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Random 2020-11-29 01:08:22 -08:00 committed by GitHub
parent ed0fda2b40
commit 0322fc28d4
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1 changed files with 9 additions and 12 deletions
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src/raymath.h
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@ -1074,27 +1074,24 @@ RMDEF Matrix MatrixLookAt(Vector3 eye, Vector3 target, Vector3 up)
Vector3 x = Vector3CrossProduct(up, z);
x = Vector3Normalize(x);
Vector3 y = Vector3CrossProduct(z, x);
y = Vector3Normalize(y);
result.m0 = x.x;
result.m1 = x.y;
result.m2 = x.z;
result.m1 = y.x;
result.m2 = z.x;
result.m3 = 0.0f;
result.m4 = y.x;
result.m4 = x.y;
result.m5 = y.y;
result.m6 = y.z;
result.m6 = z.y;
result.m7 = 0.0f;
result.m8 = z.x;
result.m9 = z.y;
result.m8 = x.z;
result.m9 = y.z;
result.m10 = z.z;
result.m11 = 0.0f;
result.m12 = eye.x;
result.m13 = eye.y;
result.m14 = eye.z;
result.m12 = -Vector3DotProduct(x, eye);
result.m13 = -Vector3DotProduct(y, eye);
result.m14 = -Vector3DotProduct(z, eye);
result.m15 = 1.0f;
result = MatrixInvert(result);
return result;
}