shadowCoord=f3Vector((shadow.framebuffer.cols()/2)*shadowCoord.x + shadow.framebuffer.cols()/2,
											 - (shadow.framebuffer.rows()/2)*shadowCoord.y + shadow.framebuffer.rows()/2,
											 ((shadow.c_far-shadow.c_near)/2)*shadowCoord.z + (shadow.c_near+shadow.c_far)/2);
						if (shadowCoord.x>0 && shadowCoord.y>0 && shadowCoord.x<shadow.zbuffer.cols() && shadowCoord.y<shadow.zbuffer.rows() &&
							shadowCoord.z<=shadow.zbuffer(shadowCoord.x,shadowCoord.y)+bias) {
							*(framebuffer.data(x,y))=shadePhong(mat, n, V, 1);
						}else {
							*(framebuffer.data(x,y))=shadePhong(mat, n, V, 0);
							   }