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Index › Programming Questions & Help › Syntax Questions › interacting instances of a class
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interacting instances of a class (Read 315 times)
Majhnavea
interacting instances of a class
Aug 17th, 2006, 7:04pm  
As my primitive knowledge in programming does not allow me to solve my problem,I need to ask you how can I create a function that allows each instance of a class to be related to another one..
For example:
there is a class that creates shapes(defined by several vertices) in random position and I need to have lots of them.This class also allows the shapes to scale and stretch randomly as well.
The basic problem is that I need a function which would define that each shape generated by this class is attached to one of the previous shape's vertices.
Is there a way to do this?
...does anyone have an idea?
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JohnG
Re: interacting instances of a class
Reply #1 - Aug 17th, 2006, 7:58pm  
You could make it so that your shapes can have shapes of their own:

Code:
class shape
{
  shape[] children;
  float x,y... etc
  
  shape(float _x, float _y, etc...)
  {
    //setup stuff
  }

  void addShape(float _x, float _y, etc...)
  {
    shape[] tmp=children;
    children=new shape[tmp.length+1];
    for(int i=0;i<tmp.length;i++)
    {
	children[i]=tmp[i];
    }
    children[tmp.length]=new shape(_x,_y,etc...);
  }

  void draw()
  {
    pushMatrix();
    //draw us;
    for(int i=0;i<children.length;i++)
    {
	children[i].draw();
    }
    popMatrix();
  }
}
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