Game Download  ZeroOne Realm

  RECT                        rcRect;rcRect.left = 0;rcRect.top = 0;// dx and dy are the width and height of the spritercRect.right = dx;rcRect.bottom = dy;// Culling - the sprite won''t be displayed at all b/c it is fully off the screen.if(x > 800) return FALSE;if(y > 600) return FALSE;if(x <= -dx) return FALSE;if(y <= -dy) return FALSE;// Clipping - alters the sprites rectangle to display// only part of the sprite// the sprite''s left coordinate is less than 0, therefore// change the rectangle''s left coordinate to negative// the sprite''s left coordinate which gives a positive// value and shrinks the left side of the rectangleif(x < 0){	rcRect.left = -x;	x=0;}// do the same to the top coordinate of the rectangleif(y < 0){	rcRect.top = -y;	y=0;}// the sprite''s top/left coordinate + width/height = a value // greater than the width/height of the screen. Therefore it // has to be clipped by doing width/height of the screen %// coordinate. In this case the screen is 800x600. The value// of the operation will shrink the width/height of the // rectangle to the appropiate value.if(x+dx > 800)	rcRect.right = 800%x;if(y+dy > 600)	rcRect.bottom = 600%y;	g_pDDSBack->BltFast(x,y,surface,&rcRect,DDBLTFAST_NOCOLORKEY);