使用JavaScript和HTML5 canvas进行碰撞检测

Question

I have a problem with collision detection in my 2D game. The collision is good at top and left of the object but doesn't work as expected at bottom and right of the object. How can I fix it?

Javascript:

this.isPlayerCollideWith = function(object) {

    if (this.posX < objekt.posX + object.width && this.posX + this.width  > object.posX &&
        this.posY < object.posY + object.height && this.posY + this.height > object.posY) {

        //up
        if(this.posY < objekt.posY + object.height){
            this.posY -= this.speed;
        }
        //down
        if(this.posY + this.height > object.posY){
            this.posY += this.speed;
        }

        //left
        if(this.posX < object.posX + object.width){
            this.posX -= this.speed;
        }

        //right
        if(this.posX + this.width > object.posX){
            this.posX += this.speed;
        }

    }
};

All of my code is running through an HTML5 canvas.

Answer 1

You have a typo: objekt should be object .

You're collision logic might be (might not be) off also. Here's working code:

if(!(
    this.x             > object.x+object.width  ||
    this.x+this.width  < object.x           ||
    this.y             > object.y+object.height ||
    this.y+this.height < object.y
)){ ... }