需要一些帮助修改此代码。我正在通过一些关于粒子系统的教程,并且我正在尝试编写seom逻辑,其中说:用倒数计时器处理杀死粒子系统
“如果此粒子系统已运行10秒,请停止向其添加粒子。粒子死了,系统是空的,将它从系统ArrayList中删除。“
现在发生了什么: - 定时器倒计时并且粒子停止添加到粒子系统,除非它作为数组列表中每个粒子系统的计时器。 - 当你添加一个新的粒子系统
我需要什么帮助定时器不复位: - 凡复位定时器,或当你犯了一个新的系统重新初始化定时器。 - 只有具有定时器影响系统其(而不是所有的人都在屏幕上)
// particle system
class ParticleSystem {
ArrayList<Particle> plist;
PVector origin; // An origin point for where particles are birthed
float c;
int t;
int countdown; // 10 seconds.
boolean end;
ParticleSystem(float col, int num, PVector v){
plist = new ArrayList<Particle>();
origin = v.get();
c = col;
end = false;
countdown = 10;
t = 10;
for(int i = 0; i < num; i++){
plist.add(new Particle(c,origin));
}
}
void applyForce(PVector force){
for (Particle p : plist){
p.applyForce(force);
}
}
void run(){
// iterate through array of single particles backwards
// remove single particles when they are dead.
t = countdown-int(millis()/1000);
print(t);
for (int i = plist.size()-1; i > 0; i--){
Particle p = plist.get(i);
p.run();
if (p.isDead()){
plist.remove(i);
}
}
if(t > 0){
addParticle();
} else {
dead();
}
//print(plist.size());
}
void addParticle(){
//println("AP: "+r);
float r = random(1);
if (r<0.4) {
plist.add(new SquareParticle(c,origin));
}else{
plist.add(new Particle(c,origin));
}
}
boolean dead(){
if(plist.isEmpty() || plist.size() == 1){
t = 10;
return true;
}else{
return false;
}
}
}
// main tab
ArrayList<ParticleSystem> systems;
PVector windRight = new PVector(0.1,0);
PVector sortaSpeed = new PVector(0,0.1);
PVector gravity = new PVector(0,0.05);
boolean wR = false;
boolean sP = false;
void setup() {
size(640,480);
systems = new ArrayList<ParticleSystem>();
noStroke();
}
void draw() {
background(0);
if(!systems.isEmpty()){
for (int i =0; i < systems.size(); i++){
ParticleSystem ps = systems.get(i);
ps.applyForce(gravity);
ps.run();
if(wR){
ps.applyForce(windRight);
}
if(sP){
ps.applyForce(sortaSpeed);
}
if(ps.dead()){
systems.remove(ps);
}
//print(systems.size());
}
} else {
fill(255);
text("'w' controls wind, 'a' controls speed, 's' adds particle systems",1,height-30);
}
}
void keyPressed() {
if(key == 'w'){
wR = true;
} else if(key == 'a'){
//print('a');
sP = true;
}else{
systems.add(new ParticleSystem(random(100,200),10,new PVector(random(10,630),10))); //random(480)
}
}
void keyReleased(){
if(key == 'w'){
wR = false;
} else if(key == 'a'){
sP = false;
}
}