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GPU/Math3D: Add a 4x4 matrix class.

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This commit is contained in:
neobrain 2013-07-29 22:49:19 +02:00
parent 9f73789c22
commit 2228ff1cd0
1 changed files with 29 additions and 0 deletions
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29
GPU/Math3D.h
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@ -548,6 +548,35 @@ private:
};
template<typename BaseType>
class Mat4x4
{
public:
// Convention: first four values in arrow = first column
Mat4x4(const BaseType values[])
{
for (unsigned int i = 0; i < 4*4; ++i)
{
this->values[i] = values[i];
}
}
template<typename T>
Vec4<T> operator * (const Vec4<T>& vec)
{
Vec4<T> ret;
ret.x = values[0]*vec.x + values[4]*vec.y + values[8]*vec.z + values[12]*vec.w;
ret.y = values[1]*vec.x + values[5]*vec.y + values[9]*vec.z + values[13]*vec.w;
ret.z = values[2]*vec.x + values[6]*vec.y + values[10]*vec.z + values[14]*vec.w;
ret.w = values[3]*vec.x + values[7]*vec.y + values[11]*vec.z + values[15]*vec.w;
return ret;
}
private:
BaseType values[4*4];
};
inline void Vec3ByMatrix43(float vecOut[3], const float v[3], const float m[12])
{
vecOut[0] = v[0] * m[0] + v[1] * m[3] + v[2] * m[6] + m[9];