Combining Bitmaps and Sound - HTML5 Canvas - page 485

function updateSaucerMissiles() {
var tempSaucerMissile = {};
var saucerMissileLength = saucerMissiles.length-1;
for (var saucerMissileCtr = saucerMissileLength;saucerMissileCtr>=0;
saucerMissileCtr--){
//ConsoleLog.log("update player missile" + playerMissileCtr)
tempSaucerMissile = saucerMissiles[saucerMissileCtr];
tempSaucerMissile.x += tempSaucerMissile.dx*frameRateCounter.step;
tempSaucerMissile.y += tempSaucerMissile.dy*frameRateCounter.step;
if (tempSaucerMissile.x > xMax) {
tempSaucerMissile.x =- tempSaucerMissile.width;
}else if (tempSaucerMissile.x<-tempSaucerMissile.width){
tempSaucerMissile.x = xMax;
}
if (tempSaucerMissile.y > yMax) {
tempSaucerMissile.y =- tempSaucerMissile.height;
}else if (tempSaucerMissile.y<-tempSaucerMissile.height){
tempSaucerMissile.y = yMax;
}
tempSaucerMissile.lifeCtr++;
if (tempSaucerMissile.lifeCtr > tempSaucerMissile.life){
//remove
saucerMissiles.splice(saucerMissileCtr,1)
tempSaucerMissile = null;
}
}
}
function updateParticles() {
var particleLength=particles.length-1;
ConsoleLog.log("particle=" + particleLength)
ConsoleLog.log("particlePool=" + particlePool.length)
for (var particleCtr=particleLength;particleCtr>=0;particleCtr--){
var remove = false;
tempParticle = particles[particleCtr];
tempParticle.x += tempParticle.dx*frameRateCounter.step;
tempParticle.y += tempParticle.dy*frameRateCounter.step;
tempParticle.lifeCtr++;
if (tempParticle.lifeCtr > tempParticle.life){
remove = true;
} else if ((tempParticle.x > xMax) || (tempParticle.x<xMin)
|| (tempParticle.y > yMax) || (tempParticle.y<yMin)){
remove=true;
}