Function get_pixel

src/examples/physics/physics.cpp:109–111

	-8,	  31,	-128, 7,   -128, 0,	  0 };

int get_pixel( int x, int y ) {
	return ( image_bitmap[( x >> 3 ) + y * image_row_length] >> ( ~x & 0x7 ) ) & 1;
}

Shape* make_ball( cpFloat x, cpFloat y ) {
	Body* body = Body::New( 1.0, INFINITY );