Unexpected token ;

Cyn1cs

//Thermal Diffusion between fire particles.

class BThermalDiffusion implements BehaviorInterface {
  float effD; //effective distance of diffusion
  float b; //coeffient
  float squaredEffD; // square of effD
  float squaredHalfEffD; // square of half effD

  BThermalDiffusion() {
   this(25.0, 0.2);
  }
  BThermalDiffusion(float x, float y) {
    effD = x;
    b = y;
    squaredEffD = effD*effD;
    squaredHalfEffD = squaredEffD/4;
  }

  void apply(VParticle p) {
    float temp=0.0;
    for(VParticle neighbor : p.neighbors) {
      if(neighbor == p)
        continue;
      float squaredDis = p.distSq(neighbor);
      if(squaredDis <= squaredEffD) 
        temp += neighbor.getTemperature()*b*(1.0-squaredDis/squaredEffD)*exp(-1.0*squaredDis/squaredHalfEffD);
    }
    p.addHeat(temp);
  }
}

Unexpect token : ;. Highlighted the last line. The sketch includes 5 files written by me. Error reported in this file.

koogs

Error reported in this file.

but that's no real guarantee that it's in this file, especially if it's something like a missing {} or ()

i can't see anything in there myself

Cyn1cs

       //Thermal Diffusion between fire particles.

class BThermalDiffusion implements BehaviorInterface {
  float effD; //effective distance of diffusion
  float b; //coeffient
  float squaredEffD; // square of effD
  float squaredHalfEffD; // square of half effD

  BThermalDiffusion() {
   this(25.0, 0.2);
  }
  BThermalDiffusion(float x, float y) {
    effD = x;
    b = y;
    squaredEffD = effD*effD;
    squaredHalfEffD = squaredEffD/4;
  }

  void apply(VParticle p) {
    float temp=0.0;
    for(VParticle neighbor : p.neighbors) {
      if(neighbor == p)
        continue;
      float squaredDis = p.distSq(neighbor);
      if(squaredDis <= squaredEffD) 
        temp += neighbor.getTemperature()*b*(1.0-squaredDis/squaredEffD)*exp(-1.0*squaredDis/squaredHalfEffD);
    }
    p.addHeat(temp);
  }
}


        //Fire Solo Particle

        class FireParticle extends SoloParticle {
          float temperature;
          color fcolor;
          float H; //Heatforce coeffient
          float a; //conservative coeffient <1
          protected float deltaHeat; //heat change rate(heat increment per frame)


          FireParticle(Vec loc) {
            super(loc);
            this.setRadius(1.0);
            temperature = 850.0;
            fcolor = color(255, 204, 0);
            a = 0.8;
            H = 0.02;
            deltaHeat = 0.0;
          }

           /*protected color colorCaculate() {
             return new color c(#FFCC00);
          }*/

           protected void updateTemperature() {
            temperature *= a;
            applyHeat();
          }

          void addHeat(float h) {
            deltaHeat += h;
          }

          protected void applyHeat() {
            temperature += this.deltaHeat;
            deltaHeat = 0.0;
          }

         //Fire particle has a intern asending force caused by temperature. need to override appleForce().  
           protected void applyForce() {
                       force.addSelf(new Vec(0, H*temperature));
                temp.set(this);

                addSelf(sub(prev).addSelf(force.mult(weight)));
                prev.set(temp.copy());

                force.clear();
            }

          float getTemperature() {
            return temperature;
          }
        }


          //Particle syetem of fire

    class FireSystem extends ParticleSystem {
      int fuel; //fuel type determines mapping function relationship between color and temperature

      FireSystem(Vec loc, int num, int f) {
        super(loc, num);
        fuel = f;
      }

      //override addParticle() to add Thermal Diffusion
      void addParticle(FireParticle f) {
      super(f);
      f.addBehavior(new BThermalDiffusion());
      }

    }

    //FireSimulation

    import punktiert.math.*;
    import punktiert.GPUPhysics.*;
    import punktiert.physics.*;

    FireSystem ps;

    void setup() {
      size(640, 360);
      colorMode(RGB, 255, 255, 255, 100);
      ps = new FireSystem(new Vec(width/2,height/2), 20, 1);
      smooth();
      frameRate(50);
    }

    void draw() {
      background(0);
      ps.run();
      ps.addParticle(new FireParticle(new Vec(mouseX,mouseY)));
    }

Above should be the whole picture. 3 files(unfinished) to simulate fire effect by particle systems. I made some tiny changes, so some code in BThermalDiffusion are a little different from previous edition. And, I still get "Unexpected token" error. Have been checking this the hole night. Plz help!

koogs

nope, i pasted it into a decent java editor and reformatted it and still can't see anything wrong with it.

are any of the files java files rather than processing files? if so you might need to follow proper java conventions like not using the color type or defining floats with a trailing f, ie 0.0f

also, it's good practice to put {}s around even single line blocks, makes it more readable. the seconds you save with the typing aren't worth the extra debugging time in my experience...

koogs

fwiw, i get a different error:

unexpected token: (

on line 100

but i don't have those libraries

learner1

I got error on line 120;--super(f);

 void addParticle(FireParticle f) {
  super(f); //<-----**unexpected token: (**
  f.addBehavior(new BThermalDiffusion());
  }

learner1

and call for ps.run() ? why? ps [object of firesystem class]

PhiLho

The super() syntax is usable only in constructors.
Otherwise, you have to use the syntax:

super.addParticle(f);

No idea for ps.run(), because you don't tell us what error you have, and we don't know what the ParticleSystem class looks like.

learner1

or he might be not writing super(param) method in the super class. or forget written that. he had the method, super(param1,param2); in the ps object, there is no run(). may be he wish to run a thread?

Cyn1cs

Thx all! guys! problem solved aly. It turns out some of my other files containing logic error.