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#ifndef _MATRIX_H_
#define _MATRIX_H_
#include "gl.h"
#include "Vector.h"
#include "Vertex.h"
class Matrix
{
public:
Matrix(GLenum pname = GL_MODELVIEW_MATRIX) {
store(pname);
}
Matrix(float in[16]) {
for(int i = 0; i < 16; ++i)
f[i] = in[i];
}
Vertex operator*(const Vertex &v) const {
Vector r(v.getX()*m[0][0] + v.getY()*m[1][0] + v.getZ()*m[2][0] + m[3][0],
v.getX()*m[0][1] + v.getY()*m[1][1] + v.getZ()*m[2][1] + m[3][1],
v.getX()*m[0][2] + v.getY()*m[1][2] + v.getZ()*m[2][2] + m[3][2]);
float w = v.getX()*m[0][3] + v.getY()*m[1][3] + v.getZ()*m[2][3] + m[3][3];
return r/w;
}
void load() {
glLoadMatrixf(f);
}
void store(GLenum pname = GL_MODELVIEW_MATRIX) {
glGetFloatv(pname, f);
}
private:
union {
float f[16];
float m[4][4];
};
};
#endif /*_MATRIX_H_*/
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