viewer_widget.py 文件源码

def update_projection_matrix(self):
        u = self.z_near*tan(radians(self.fov))
        r = u*self.width()/self.height()
        self.projection_matrix = create_frustum_matrix(-r,r,-u,u,self.z_near,self.z_far)
        self.projection_matrix_need_update = False