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Index › Programming Questions & Help › Syntax Questions › use class with "for"
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use class with "for" (Read 707 times)
galbostein
use class with "for"
Jan 8th, 2010, 1:46pm  
hello
first i'm sorry for my bad english
i'm started with processing. i was in a workshop with simon Geilfus (Kinesis) in Brussel. now i want to work.

I try to use a class in a "for"
my class is ok, but i don't know how to use it with "for".

this is my code:

//-------------------------------------------------

class Tri {

 float x;
 float y;
 float h;
 float w;
 float c1;
 float c2;
 float c3;
 float c4;
 float x2;
 float y2;

 Tri(float _x, float _y, float _h, float _w, float _c1, float _c2, float _c3, float _c4){

   x = _x;
   y = _y;
   h = _h;
   w = _w;
   c1 = _c1;
   c2 = _c2;
   c3 = _c3;
   c4 = _c4;

 }

 void dessinerTri(){

   float centerX = mouseX;
   float centerY = mouseY;

   if(mouseX < x) centerX = x;
   if(mouseX > x+w) centerX = x+w;
   if(mouseY < y) centerY = y;
   if(mouseY > y+h) centerY = y+h;    

   fill(c1, random(mouseY), random(mouseX));
   triangle(centerX, centerY, x, y, x+w, y);
   fill(c2, random(mouseY), random(mouseX));
   triangle(centerX, centerY, x+w, y, x+w, y+h);
   fill(c3, random(mouseY), random(mouseX));
   triangle( x+w, y+h, centerX, centerY, x, y+h);
   fill(c4, random(mouseY), random(mouseX));
   triangle( x, y+h, centerX, centerY, x, y);

 }

}


//--------------------------------------------------------



void setup(){

 size(500,500);

}

void draw(){

 background(130);


 Tri tri01;
 tri01 = new Tri(10, 10, 30, 30, 10, 10, 10, 10);
 tri01.dessinerTri();


 //THIS IS THE "FOR" THAT I WANT USE
 
 /*

  for(int i=0;i<=500;i+=50){
  for(int j=0; j<= 500; j+=50){
  dessinerTri(i, j);
  }
  }
 
  */

}


i'm enjoy to integrate the processing community
thanks
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PhiLho 
Re: use class with "for"
Reply #1 - Jan 8th, 2010, 2:10pm  
Should be tri01.dessinerTri(i, j);
Note: since the method is in Tri class, you can just call it dessiner(), since it will always be called in context.
Now, you also need to create a dessinerTri() method (or dessiner()) in Tri class, that accepts two arguments and does something with them...
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WWW  
galbostein
Re: use class with "for"
Reply #2 - Jan 8th, 2010, 2:49pm  
ok for tri01.dessinerTri(i, j);
But i don't understand how to create a dessinerTri() in Tri class, i thought already create it. and i don't know what is an argument. i'm a ultra novice.
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JR
Re: use class with "for"
Reply #3 - Jan 9th, 2010, 1:30am  
Arguments are variables you pass to a function.
Code:

class Tri
{

  //This is a method without arguments
  void dessiner()
  {
     //...
  }

  //This is a method with arguments
  void dessiner(int x, int y)
  {
     //...
  }
}


You can then call a function of that class:

Code:

Tri tri = new Tri();
tri.dessiner(); //No arguments
tri.dessiner(50, 50); //With arguments
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