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rectangles collision side detection

Zany Zebra answered on August 20, 2021 Popularity 8/10 Helpfulness 3/10

answer rectangles collision side detection

rectangles collision side detection

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function collide(r1,r2){
    var dx=(r1.x+r1.w/2)-(r2.x+r2.w/2);
    var dy=(r1.y+r1.h/2)-(r2.y+r2.h/2);
    var width=(r1.w+r2.w)/2;
    var height=(r1.h+r2.h)/2;
    var crossWidth=width*dy;
    var crossHeight=height*dx;
    var collision='none';
    //
    if(Math.abs(dx)<=width && Math.abs(dy)<=height){
        if(crossWidth>crossHeight){
            collision=(crossWidth>(-crossHeight))?'bottom':'left';
        }else{
            collision=(crossWidth>-(crossHeight))?'right':'top';
        }
    }
    return(collision);
}

Popularity 8/10 Helpfulness 3/10 Language whatever

Source: stackoverflow.com

Tags: collision detection rectangles whatever

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