如何使Processing.org草图更高效?

我有一个简单的素描(英文) Processing ),基本上是一堆圆点四处游荡,如果它们相互接触,它们就会战斗(每一个都有一个强度值,每次获胜都会增加,如果相等,则赢家是随机选择的)

它适用于大约5000个12像素的“僵尸”(半秒钟内会有轻微的减速,而僵尸最初会相互碰撞),问题是当僵尸变小时,它们之间的碰撞不会很快,而且减速会持续更长时间。。

lurching 学位(或否)。我认为速度慢的最大原因是碰撞检测——每个僵尸都会互相检查(所以僵尸1检查2-5000,僵尸2检查1,3-5000等等)

我希望一切都保持简单,并且“简单处理”(不使用外部库,这可能更高效、更简单,但我觉得它对学习没有多大用处)

int numZombies = 5000;

Zombie[] zombies = new Zombie[numZombies];

void setup(){
  size(512, 512);
  noStroke();
  for(int i = 0; i < numZombies; i++){
    zombies[i] = new Zombie(i, random(width), random(height), random(360), zombies);
  }
}

void draw(){
  background(0);

  for(int i = 0; i < numZombies; i++){
    zombies[i].move();
    zombies[i].display();
  }
}

class Zombie{
  int id; // the index of this zombie

  float x, y; // current location
  float angle; // angle of zombies movement
  float lurching = 10; // Amount angle can change
  float strength = 2;

  boolean dead = false; // true means zombie is dead

  float diameter = 12; // How big the zombie is
  float velocity = 1.0; // How fast zombie moves

  Zombie[] others; // Stores the other zombies

  Zombie(int inid, float xin, float yin, float inangle, Zombie[] oin){
    id = inid;
    x = xin;
    y = yin;
    angle = inangle;
    others = oin;
  }

  void move(){
    if(dead) return;

    float vx = velocity * sin(radians(180-angle));
    float vy = velocity * cos(radians(180-angle));

    x = x + vx;
    y = y + vy;

    if(x + vx < 0 || x + vx > width || y + vy < 0 || y + vy > height){
      // Collided with wall
      angle = angle + 180;
    }

    float adecide = random(3);

    if(adecide < 1){
      // Move left
      angle=angle - lurching;
    }
    else if(adecide > 1 && adecide < 2){
      // Don't move x
    }
    else if(adecide > 2){
      // Move right
      angle = angle + lurching;
    }

    checkFights();
  }

  void checkFights(){
    for (int i=0; i < numZombies; i++) {
      if (i == id || dead || others[i].dead){
        continue;
      }

      float dx = others[i].x - x;
      float dy = others[i].y - y;
      float distance = sqrt(dx*dx + dy*dy);

      if (distance < diameter){
        fight(i);
      }
    }
  }

  void fight(int oid){
    Zombie o = others[oid];

    //println("Zombie " + id + "(s: "+ strength +") fighting " + oid + "(s: "+ o.strength +")");

    if(strength < o.strength){
      kill();
      o.strength++;
    } 
    else if (strength == o.strength){
      if(random(1) > 0.5){
        kill();
        o.strength++;
      }
      else{
        o.kill();
        strength++;
      }
    }
  }

  void kill(){
    dead = true;
  }

  void display(){
    if(dead) return;
    ellipse(x, y, diameter, diameter);
  }
}