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#ifndef __LOG_MAT44_H__
#define __LOG_MAT44_H__
//
// 4x4矩阵，不需要转置，直接运用在Opengl中，由于opengl的glUniformMatrix按列填入矩阵，进行
// 的是和列向量的右乘，为了不需要转置，直接使用按列定义的矩阵。保证矩阵的内存排列和输入opengl
// 的统一
//
class Matrix44
{
public:
static const Matrix44 Identity;
Matrix44();
Matrix44(const Matrix44& m);
~Matrix44();
void operator = (const Matrix44& m);
void SetOrtho(float _left, float _right, float _bottom, float _top, float _near, float _far);
Matrix44 operator * (const Matrix44 & m) const;
void operator *= (const Matrix44 & m);
const float* GetElements() const;
void SetIdentity();
void SetTranslation(float x, float y);
void SetRotation(float r);
void SetScale(float sx, float sy);
void SetShear(float kx, float ky);
void SetTransformation(float x, float y, float angle, float sx, float sy, float ox, float oy);
void Translate(float x, float y);
//
// 饶xyz轴旋转
//
void Rotate(float r, float x, float y, float z);
void Scale(float sx, float sy);
void Transform(float x, float y, float angle, float sx, float sy, float ox, float oy);
//
// Multiplies this Matrix44 with a shear transformation.
// @param kx Shear along the x-axis.
// @param ky Shear along the y-axis.
//
void Shear(float kx, float ky);
void Ortho(float left, float right, float bottom, float top, float near, float far);
////
//// Transforms an array of vertices by this Matrix44. The sources and
//// destination arrays may be the same.
////
//// @param dst Storage for the transformed vertices.
//// @param src The source vertices.
//// @param size The number of vertices.
////
//void transform(Graphics::Vertex* dst, const Graphics::Vertex * src, int size) const;
//
//
//
void Frustum(float l, float r, float t, float b, float near, float far);
void Perspective(float fov, float aspect, float near, float far);
private:
//
// | e0 e4 e8 e12 |
// | e1 e5 e9 e13 |
// | e2 e6 e10 e14 |
// | e3 e7 e11 e15 |
//
float e[16];
};
#endif
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