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Index › Programming Questions & Help › Other Libraries › particle class instances
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particle class instances (Read 1310 times)
Majhnavea
particle class instances
Aug 15th, 2006, 2:43pm  
Still struggling..with the Physics Library..
I would like to ask what should be the right way to construct a class containing particles and then create instances of this class with different particles' attributes (e.g. their location)
From the tendril example, I can see that there is lots of Java involved..which I am not able to understand.
Is there any simpler example of doing this?
I know that what I am asking refers to simple and basic knowledge of Object Oriented Design..which I don't have..but I do try to understand
If anyone has some basic instructions of to get out of this mess.. let me know
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wxs
Re: particle class instances
Reply #1 - Aug 15th, 2006, 9:55pm  
You could try something like this (it is Object Oriented)

Code:

ParticleSystem physics = new ParticleSystem(0,0);

class MyClass {
  Particle[] particles;

  MyClass(int numParticles) {
    particles = new int[numParticles];
    for (int i = 0; i < numParticles; i++) {
     particles[i] = physics.makeParticle();
    }
  } 
}


Basically what that code does is create a class called MyClass which has an array of particles within it. When you create a new instance of MyClass you pass it one parameter which is the number of particles like so:

Code:

MyClass example = new MyClass(5);


Now in order to set each of the particles to a different position you refer to the aforementioned array:

Code:

example.particles[4].moveTo(1,2,3);
example.particles[8].moveTo(12,23,34);


I hope that all makes sense.

 Xavier
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« Last Edit: Aug 16th, 2006, 4:17am by wxs »  
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Majhnavea
Re: particle class instances
Reply #2 - Aug 16th, 2006, 2:00am  
Thank you so much!!!
It does make more sense now...
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