material.py 文件源码

def create_matrix(self):
        c = cos(radians(self.rotation))
        s = sin(radians(self.rotation))
        R = numpy.matrix([[c,-s,0],[s,c,0],[0,0,1]])
        S = numpy.matrix([[self.scale_s,0,0],[0,self.scale_t,0],[0,0,1]])
        C = numpy.matrix([[1,0,self.center_s],[0,1,self.center_t],[0,0,1]])
        T = numpy.matrix([[1,0,self.translation_s],[0,1,self.translation_t],[0,0,1]])

        # Only types 0x00, 0x06, 0x07, 0x08 and 0x09 have been tested
        if self.matrix_type in {0x00,0x02,0x0A,0x0B,0x80}:
            P = numpy.matrix([[1,0,0,0],[0,1,0,0],[0,0,0,1]])
        elif self.matrix_type == 0x06:
            P = numpy.matrix([[0.5,0,0,0.5],[0,-0.5,0,0.5],[0,0,0,1]])
        elif self.matrix_type == 0x07:
            P = numpy.matrix([[0.5,0,0.5,0],[0,-0.5,0.5,0],[0,0,1,0]])
        elif self.matrix_type in {0x08,0x09}:
            P = numpy.matrix([[0.5,0,0.5,0],[0,-0.5,0.5,0],[0,0,1,0]])*numpy.matrix(self.projection_matrix)
        else:
            raise ValueError('invalid texture matrix type')

        M = T*C*S*R*C.I*P

        if self.shape == gx.TG_MTX2x4:
            return M[:2,:]
        elif self.shape == gx.TG_MTX3x4:
            return M
        else:
            raise ValueError('invalid texture matrix shape')