bouncing ball pong sort of thing

[dondeigo]

greeting all you wonderfull flash people.

Ill get to the point fast, i realy need help whit som flash math.

It is a bouncing ball pong sort of thing i'm trying to make.

so on my stage i got... well,
a ball_mc and a block_mc and the problem is i have no clue how to get ball_mc to bounce off the block _mc, can anyon help me,

herer is the fla
http://www.box.net/public/n0b2o4d6c8

init();
function init() {
    left = 0;
    right = 140;
    top = 0;
    bottom = 380;
    ball_mc.onEnterFrame = move;
    ball_mc.onPress = drag;
    block_mc.onPress = drag;
    ball_mc.onRelease = ball_mc.onReleaseOutside=noDrag;
    block_mc.onRelease = block_mc.onReleaseOutside=noDrag;
    friction = .98;     // constant drag on momentum
    restitution = .99;  // bounciness
    grav = 1;            // +Y force
    smoosh=1,5 ;
    squishLimit=30;     // larger values=more squish
    jiggle=.25;            // larger values=more jiggle
}

function drag() {
    this.startDrag();
    this.dragging = true;
}
function noDrag() {
    this.stopDrag();
    this.dragging = false;
}


function move() {
    // + JIGGLE
    Xsquishforce+=(100-this._xscale);
    Ysquishforce+=(100-this._yscale);
    
    Xsquishforce*=jiggle;
    Ysquishforce*=jiggle;
    
    this._xscale+=Xsquishforce;
    this._yscale+=Ysquishforce;
    // - JIGGLE
    
    if (!this.dragging) {
        this.velY += grav;
        this.velX *= friction;
        this.velY *= friction;
        this._x += this.velX;
        this._y += this.velY;
        
        if(ball_mc, hitTest(block_mc)) {
        this.velY += grav;
        this.velX *= friction;
        this.velY *= friction;
        this._x += this.velX;
        this._y += this.velY;


        
        collision=0; // init

        if (ball_mc._x>right-(this._width/2)) {
            collision=Math.abs(ball_mc.oldX-this._x);
            if(collision<3){collision=0;}
            
            ball_mc._yscale+=smoosh*collision;
            ball_mc._xscale-=smoosh*collision;
            
            ball_mc._x = right-(ball_mc._width/2);
            ball_mc.velX *= -1*restitution;

             }
            if (ball_mc._x<left+(ball_mc._width/2)) {
            collision=Math.abs(ball_mc.oldX-ball_mc._x);
            if(collision<3){collision=0;}
            
            ball_mc._yscale+=smoosh*collision;
            ball_mc._xscale-=smoosh*collision;
            
            ball_mc._x=left+(ball_mc._width/2);
            ball_mc.velX *= -1*restitution;
        

        }

        if (this._y>bottom-(this._height/2)) {
            collision=Math.abs(this.oldY-this._y);
            if(collision<3){collision=0;}
            
            this._xscale+=smoosh*collision;
            this._yscale-=smoosh*collision;
                    
            this._y = bottom-(this._height/2);
            this.velY *= -1*restitution;
        

            }
        if (this._y<top+(this._height/2)) {
            collision=Math.abs(this.oldY-this._y);
            if(collision<3){collision=0;}
            
            this._xscale+=smoosh*collision;
            this._yscale-=smoosh*collision;
            
            this._y = top+(this._height/2);
            this.velY *= -1*restitution;
        

        }
        if(this._xscale<100-squishLimit){this._xscale=100-squishLimit;}
        else if(this._xscale>100+squishLimit){this._xscale=100+squishLimit;}
        
        if(this._yscale<100-squishLimit){this._yscale=100-squishLimit;}
        else if(this._yscale>100+squishLimit){this._yscale=100+squishLimit;}
    } else {
        hit="null";
        this.velX = this._x-this.oldX;
        this.velY = this._y-this.oldY;
        
    }
    this.oldX = this._x;
    this.oldY = this._y;

}
}

[georgegowan]

Hey. All you need to do is make a hitTest between the ball and the dragable level movieclip. And if the hitTest is true then you make the fallspeed in your case
velY into velY = -velY and then

so it would look somthing like this

if(ball_mc.hitTest(block_mc)){
ball_mc.velY = -velY
}

or

if(ball_mc.hitTest(block_mc)){
this.velY = -velY
}

depends where you put it.

[dondeigo]

thanks
but your suggestion is not working?

I'm stuck whit this...HEEEELP

[georgegowan]

K, ill try and edit yours so it will do it...

EDIT: actualy, ill just make 1 from scratch but ill just skip the smoosh part.

[georgegowan]

http://files-upload.com/129778/ball_bounce.zip.html

there tis. the only problem (there as always a catch ;D) it only will bounce of the top edge of the platform. ill have a look into bouncing of all edges correctly if you want.

[insanedoom]

i have this bidea to discomplicate you

for the hittest detection in a ball
you must
ps. the point in the ball must be in the center

detect=(floor.hittest(ball._x+ball.width*0.5,ball. _y,true))||(floor.hittest(ball._x-ball.width*0.5,ball._y,true))||(floor.hittest(ball ._y+ball.height*0.5,ball._x,true))||(floor.hittest (ball._y-ball.height*0.5,ball._x,true))

if(detect){
//invert speeds of the ball
}