This red square bounces when it hits the floor:
Bouncing
Another functionallity we want to add is the bounce property.
The bounce property indicates if the component will bounce back when gravity makes it fall down to the ground.
The bounce property value must be a number. 0 is no bounce at all, and 1 will make the component bounce all the way backto where it start falling.
Example
function component(width, height, color, x, y, type) {
this.type = type;
this.width = width;
this.height = height;
this.x = x;
this.y = y;
this.speedX = 0;
this.speedY = 0;
this.gravity = 0.1;
this.gravitySpeed = 0;
this.bounce = 0.6;
this.update = function() {
ctx = myGameArea.context;
ctx.fillStyle = color;
ctx.fillRect(this.x, this.y, this.width, this.height);
}
this.newPos = function() {
this.gravitySpeed += this.gravity;
this.x += this.speedX;
this.y
+= this.speedY + this.gravitySpeed;
this.hitBottom();
}
this.hitBottom = function() {
var rockbottom = this.gamearea.canvas.height - this.height;
if (this.y > rockbottom) {
this.y = rockbottom;
this.gravitySpeed = -(this.gravitySpeed * this.bounce);
}
}
}
Try it Yourself »