View difference between Paste ID: y0fEBxHm and

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+function rect_collision(x1, y1, w1, h1, x2, y2, h2, w2) {
     var top1 = y1;
     var bottom1 = y1 + h1;
     var left1 = x1;
     var right1 = x1 + w1;
     var top2 = y2;
     var bottom2 = y2 + h2;
     var left2 = x2;
     var right2 = x2 + w2;
     //console.log('----' + top1, bottom1, left1, right1, top2, bottom2, left2, right2 + '----');
 
     //console.log('top 1: ' + top1);
     //console.log('bottom 1: ' + bottom1);
     //console.log('top 2: ' + top2);
     //console.log('bottom 2: ' + bottom2);
     //console.log('x1: ' + x1);
     //console.log('x2: ' + x2);
     //console.log('y2: ' + y2);
     //console.log('h2: ' + h2);
     //console.log(x1, y1, w1, h1, x2, y2, h2, w2);
     //console.log('------------------------------------------------')
 	if !(x1 + w1 < x2 ||
            x2 + w2 < x1 ||
            y1 + h1 < y2 ||
            y2 + h2 < y1) return true;
 	}
 
     return false;
 }