Matrix3类 参考

Public 成员函数
	Matrix3 (float scalar)
	Matrix3 (float x0, float y0, float z0, float x1, float y1, float z1, float x2, float y2, float z2)
	Matrix3 (Vector3 v1, Vector3 v2, Vector3 v3)
float	get (int i, int j)
void	set (int i, int j, float val)
Matrix4	toMatrix4 ()