Math, Physics, and Animation - HTML5 Canvas - page 351

update ();
testWalls ();
collide ();
render ();

}

function function update () {

for

for ( var var i = 0 ; i < balls . length ; i ++ ) {

ball = balls [ i ];
//Friction
ball . velocityx = ball . velocityx - ( ball . velocityx * friction );
ball . velocityy = ball . velocityy - ( ball . velocityy * friction );

ball . nextx = ( ball . x += ball . velocityx );
ball . nexty = ( ball . y += ball . velocityy );

}

}

function function testWalls () {

var var ball ;

var var testBall ;

for for ( var var i = 0 ; i < balls . length ; i ++ ) {

ball = balls [ i ];

iif ( ball . nextx + ball . radius > theCanvas . width ) {
ball . velocityx = ball . velocityx *- 1 ;
ball . nextx = theCanvas . width - ball . radius ;

} else else iif ( ball . nextx - ball . radius < 0 ) {

ball . velocityx = ball . velocityx *- 1 ;
ball . nextx = ball . radius ;

} else else iif ( ball . nexty + ball . radius > theCanvas . height ) {

ball . velocityy = ball . velocityy *- 1 ;
ball . nexty = theCanvas . height - ball . radius ;

} else else iif ( ball . nexty - ball . radius < 0 ) {

ball . velocityy = ball . velocityy *- 1 ;
ball . nexty = ball . radius ;

}

}