raytrace\Sphere.cls ........\LightSource.cls ........\Matrix.bas ........\Ray.vbp ........\Ray.vbw ........\RayTracing.bas ........\frmRay.frm ........\Disk.cls ........\Plane.cls ........\Ray.exe ........\RayTraceable.cls ........\RayTracing.htm ........\Cylinder.cls ........\使用说明.txt raytrace