Combining Bitmaps and Sound - HTML5 Canvas - page 483

}
}
if (tempRock.x > xMax) {
tempRock.x = xMin-tempRock.width;
}else if (tempRock.x<xMin-tempRock.width){
tempRock.x = xMax;
}
if (tempRock.y > yMax) {
tempRock.y = yMin-tempRock.width;
}else if (tempRock.y<yMin-tempRock.width){
tempRock.y = yMax;
}
//ConsoleLog.log("update rock "+ rockCtr)
}
}
function updateSaucers() {
//first check to see if we want to add a saucer
if (saucers.length< levelSaucerMax){
if (Math.floor(Math.random()*100)<=levelSaucerOccurrenceRate){
//ConsoleLog.log("create saucer")
var newSaucer = {};
newSaucer.width = 30;
newSaucer.height = 13;
newSaucer.halfHeight = 6.5;
newSaucer.halfWidth = 15;
newSaucer.hitWidth = 30;
newSaucer.hitHeight = 13;
newSaucer.scoreValue = saucerScore;
newSaucer.fireRate = levelSaucerFireRate;
newSaucer.fireDelay = levelSaucerFireDelay;
newSaucer.fireDelayCount = 0;
newSaucer.missileSpeed = levelSaucerMissileSpeed;
newSaucer.dy = (Math.random()*2);
if (Math.floor(Math.random)*2==1){
newSaucer.dy *= -1;
}
//choose betweeen left or right edge to start
if (Math.floor(Math.random()*2)==1){
//start on right and go left
newSaucer.x = 450;
newSaucer.dx = -1*levelSaucerSpeed;
}else{
//left to right
newSaucer.x = -50;
newSaucer.dx = levelSaucerSpeed;
}