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Common: Add additional Matrix/Vec functions.

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This commit is contained in:
Jordan Woyak 2019-11-05 18:42:52 -06:00
commit 1e028025e5
2 changed files with 23 additions and 0 deletions
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17
Source/Core/Common/Matrix.cpp
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@ -84,6 +84,23 @@ Matrix33 Matrix33::RotateZ(float rad)
return mtx;
}
Matrix33 Matrix33::Rotate(float rad, const Vec3& axis)
{
const float s = std::sin(rad);
const float c = std::cos(rad);
Matrix33 mtx;
mtx.data[0] = axis.x * axis.x * (1 - c) + c;
mtx.data[1] = axis.x * axis.y * (1 - c) - axis.z * s;
mtx.data[2] = axis.x * axis.z * (1 - c) + axis.y * s;
mtx.data[3] = axis.y * axis.x * (1 - c) + axis.z * s;
mtx.data[4] = axis.y * axis.y * (1 - c) + c;
mtx.data[5] = axis.y * axis.z * (1 - c) - axis.x * s;
mtx.data[6] = axis.z * axis.x * (1 - c) - axis.y * s;
mtx.data[7] = axis.z * axis.y * (1 - c) + axis.x * s;
mtx.data[8] = axis.z * axis.z * (1 - c) + c;
return mtx;
}
Matrix33 Matrix33::Scale(const Vec3& vec)
{
Matrix33 mtx = {};