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Index › Programming Questions & Help › Syntax Questions › arrayIndexOutOfBandsException only with P3D
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arrayIndexOutOfBandsException only with P3D (Read 556 times)
mohamm
arrayIndexOutOfBandsException only with P3D
Oct 1st, 2009, 5:29am  
hello,

i try to make a grid of shape with a noise function which implement some of shape's vertex.It works fine on OPENGL render but  in P3D
i've got an arrayIndexOutOfBandsException. I don't understand why.
Any idea ?

here the code :

//import processing.opengl.*;

float xmag, ymag = 0;
float newXmag, newYmag = 0;
float xoff = 0.0;
float xincrement = 0.01;
//float  vBackground = 0;
//float n = 0.0;
void setup()
{
 size(640, 360, P3D);
 noStroke();
 //colorMode(RGB, 1);
 smooth();
 //noStroke();
}

void draw()
{
 background(0);
 println("start");
 // Get a noise value based on xoff and scale it according to the window's width
 float n = noise(xoff);
 
 // With each cycle, increment xoff
 xoff += xincrement;
 
 //pushMatrix();
 //vBackground = n;
 translate(width/2, height/2, -30);
 
 newXmag = mouseX/float(width) * TWO_PI;
 newYmag = mouseY/float(height) * TWO_PI;
 
 float diff = xmag-newXmag;
 if (abs(diff) >  0.01) { xmag -= diff/4.0; }
 
 diff = ymag-newYmag;
 if (abs(diff) >  0.01) { ymag -= diff/4.0; }
 
 rotateX(-ymag);
 rotateY(-xmag);
 scale(15);
 //fill(255);
 noFill();
 stroke(255);
 for (int i = 0; i<20; i++){
   for (int y = 0; y<20; y++){
   pushMatrix();
     translate(i*15, y*15, 0);
   beginShape(QUADS);

  vertex(-1+n,  1+n,  1+n);
  vertex( 1+n,  1+n,  1+n);
  vertex( 1+n, -1+n,  1+n);
  vertex(-1+n, -1+n,  1+n);

  vertex( 1-n,  1-n,  1-n);
  vertex( 1-n,  1-n, -1-n);
  vertex( 1-n, -1-n, -1-n);
  vertex( 1-n, -1-n,  1-n);

  vertex( 1+n,  1+n, -1+n);
  vertex(-1+n,  1+n, -1+n);
  vertex(-1+n, -1+n, -1+n);
  vertex( 1+n, -1+n, -1+n);

  vertex(-1,  1, -1);
  vertex(-1,  1,  1);
  vertex(-1, -1,  1);
  vertex(-1, -1, -1);

  vertex(-1,  1, -1);
  vertex( 1,  1, -1);
  vertex( 1,  1,  1);
 vertex(-1,  1,  1);

  vertex(-1, -1, -1);
 vertex( 1, -1, -1);
 vertex( 1, -1,  1);
  vertex(-1, -1,  1);

 endShape();
 popMatrix();  
}}
println(n);  

}
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mohamm
Re: arrayIndexOutOfBandsException only with P3D
Reply #1 - Oct 1st, 2009, 7:23am  
soory i do a mistake, here the code :


import processing.opengl.*;


float xmag, ymag = 0;
float newXmag, newYmag = 0;
float xoff = 0.0;
float xincrement = 0.01;
//float  vBackground = 0;
//float n = 0.0;
MyCube[]cube;

int numCube = 20;
int sCube = 15;
//MyMotorNoise Noise;

void setup()
{
 size(640, 360, OPENGL);
 noStroke();
 //colorMode(RGB, 1);
 smooth();
 //noStroke();
//Noise = new MyMotorNoise();
cube = new MyCube[numCube*numCube];
int k = 0;
for(int i = 0; i<numCube; i++){
 for(int j = 0; j<numCube; j++){
   cube[k] = new MyCube(i*sCube, j*sCube);
   k++;  
}}
}

void draw()
{
 background(0);
 //println("o");

 //pushMatrix();
 //vBackground = n;
 translate(width/2, height/2, -30);
 
 newXmag = mouseX/float(width) * TWO_PI;
 newYmag = mouseY/float(height) * TWO_PI;
 
 float diff = xmag-newXmag;
 if (abs(diff) >  0.01) { xmag -= diff/4.0; }
 
 diff = ymag-newYmag;
 if (abs(diff) >  0.01) { ymag -= diff/4.0; }
 
 rotateX(-ymag);
 rotateY(-xmag);
 
 for(int k = 0; k<cube.length; k++){
 
    cube[k].display();
   
     
  }
//println(cube[10].x);
// println(cube[15].x);
}

class MyCube {
 int x, y, z;
 float n =0.0;
 
 MyCube(int xInp, int yInp){
   x = xInp;
   y = yInp;
 }
 
 void display(){
  // Get a noise value based on xoff and scale it according to the window's width
//println(x);
 float n = noise(xoff);
 
 // With each cycle, increment xoff
 xoff += xincrement;
 
 
   //n = nInp;
   scale(sCube);
 //fill(255);
 noFill();
 stroke(255);
   pushMatrix();
   //println(x);
   translate(x, y, 0);
   beginShape(QUADS);

  vertex(-1+n,  1+n,  1+n);
  vertex( 1+n,  1+n,  1+n);
  vertex( 1+n, -1+n,  1+n);
  vertex(-1+n, -1+n,  1+n);

  vertex( 1-n,  1-n,  1-n);
  vertex( 1-n,  1-n, -1-n);
  vertex( 1-n, -1-n, -1-n);
  vertex( 1-n, -1-n,  1-n);

  vertex( 1+n,  1+n, -1+n);
  vertex(-1+n,  1+n, -1+n);
  vertex(-1+n, -1+n, -1+n);
  vertex( 1+n, -1+n, -1+n);

  vertex(-1,  1, -1);
  vertex(-1,  1,  1);
  vertex(-1, -1,  1);
  vertex(-1, -1, -1);

  vertex(-1,  1, -1);
  vertex( 1,  1, -1);
  vertex( 1,  1,  1);
 vertex(-1,  1,  1);

  vertex(-1, -1, -1);
 vertex( 1, -1, -1);
 vertex( 1, -1,  1);
  vertex(-1, -1,  1);

 endShape();
 popMatrix();  
 }
}
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PhiLho 
Re: arrayIndexOutOfBandsException only with P3D
Reply #2 - Oct 1st, 2009, 8:03am  
You know, you have a Modify button (and a Code one, but that's less important)...

And I suppose it is ArrayIndexOutOfBoundsException, instead.
As I often say, giving the full stack trace and pointing to the line where you have the error might help.

I ran your sample, and the exception is within Processing's PLine class.
You should look if this bug exists in the bug database (see Contribute link), and if not, report it.
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