graphics

 

wate wave

　yofs = 0;
　for (i = 0; i < 480; i++)
　{
　　for (j = 0, ofs = yofs; j < 640; j++, ofs++)
　　{
　　　((unsigned int*)screen->pixels)[ofs] = i * i + j * j + tick;
　　}
　　yofs += screen->pitch / 4;
　}