xmatrix.inl

XMathLib是一个通用的3D图形数学库。 其中包含两个部分： XMathLib和XGeomLib。分别处理数学和几何运算。 数学部分包含向量、矩阵、四元数的运算。以及其它的运算。 几何部分

#ifndef __XMATRIX_INLINE_INCLUDE__ 
#define __XMATRIX_INLINE_INCLUDE__ 

#ifndef IN_MATHLIB_NAMESPACE
#error   You cann't include this file out the XMathLib  namespace
#endif

	
    class  _MATH_LIB_EXPORT_ XMatrix
    {
    public:
        XMatrix()
        {
            memset((void*) data,0,sizeof(float)*16);
        }
        XMatrix(float i)
        {
            memset((void*) data,0,sizeof(float)*16);
            for(int  c = 0 ; c < 4 ; c++)
            {
                m[c][c] = i;
            }
        }

        void LoadIdentity()
        {
            memset((void*) data,0,sizeof(float)*16);
            for(int  c = 0 ; c < 4 ; c++)
            {
                m[c][c] = 1;
            }
        }

        XMatrix(float m[16])
        {
            memcpy((char*)data,(char*)data,sizeof(float)*16);
        }

        XMatrix(XVector vec[4],bool isVertical)
        {
            if(isVertical)
            {
                m[0][0] = vec[0].x;
                m[1][0] = vec[0].y;
                m[2][0] = vec[0].z;
                m[3][0] = vec[0].w;

                m[0][1] = vec[1].x;
                m[1][1] = vec[1].y;
                m[2][1] = vec[1].z;
                m[3][1] = vec[1].w;

                m[0][2] = vec[2].x;
                m[1][2] = vec[2].y;
                m[2][2] = vec[2].z;
                m[3][2] = vec[2].w;

                m[0][3] = vec[3].x;
                m[1][3] = vec[3].y;
                m[2][3] = vec[3].z;
                m[3][3] = vec[3].w;

            }
            else
            {
                m[0][0] = vec[0].x;
                m[0][1] = vec[0].y;
                m[0][2] = vec[0].z;
                m[0][3] = vec[0].w;

                m[1][0] = vec[1].x;
                m[1][1] = vec[1].y;
                m[1][2] = vec[1].z;
                m[1][3] = vec[1].w;

                m[2][0] = vec[2].x;
                m[2][1] = vec[2].y;
                m[2][2] = vec[2].z;
                m[2][3] = vec[2].w;

                m[3][0] = vec[3].x;
                m[3][1] = vec[3].y;
                m[3][2] = vec[3].z;
                m[3][3] = vec[3].w;
            }
        }

        void Transform(float tx,float ty,float tz)
        {
            m[3][0] += tx;
            m[3][1] += ty;
            m[3][2] += tz;
        }
        void SetTransform(float tx,float ty,float tz)
        {
            m[3][0] = tx;
            m[3][1] = ty;
            m[3][2] = tz;
        }

        void Scale(float sx,float sy,float sz)
        {
            m[0][0] *= sx ; m[0][1] *= sx ; m[0][2] *= sx ;
            m[1][0] *= sy ; m[1][1] *= sy ; m[1][2] *= sy ;
            m[2][0] *= sz ; m[2][1] *= sz ; m[2][2] *= sz ;
        }

        void From(XMatrix3x3& _m);

    public :
        union
        {
            struct
            {
                float m00,m01,m02,m03;
                float m10,m11,m12,m13;
                float m20,m21,m22,m23;
                float m30,m31,m32,m33;
            };
            float data[16];
            float m[4][4];
        };
    };

#endif