I have the following script which utilizes the OpenGL library.  If I make the sketch 1000 by 1000 pixels, everything works fine.  If I make the sketch 3000 by 3000 pixels or larger, I get a black background and nothing else.  Is this an OpenGL problem?  Without OpenGL, I can produce an image at 10000 by 10000 pixels (any bigger and the applet crashes), but that takes hours to render...

Much thanks for any help...I'm still very much a newbie

Code:

import processing.opengl.*;

size(1000, 1000); //Ultimately, I want this to be 12000 x 12000 so I can make a 40" square print at 300dpi

background(255);

colorMode(RGB, 255);

PImage d = loadImage("DSC_0013.JPG"); //pretty big image...3008 x 2000 pixels, 752kb


int cR, cG, cB;


for(int i=0; i<d.width*d.height; i+=75){


int n=2;

 cR = (d.pixels[i] >> 16) & 0x000000ff;   
 cG = (d.pixels[i] >> 8) & 0x000000ff;   
 cB = d.pixels[i] & 0x000000ff; 

 int x1 = width/2;
 int y1 = int(height/2-(cR*n));

 int x2 = int(width/2-(cG*n)*cos(PI/6));
 int y2 = int(height/2+(cG*n)*sin(PI/6));

 int x3 = int(width/2+(cB*n)*cos(PI/6));
 int y3 = int(height/2+(cB*n)*sin(PI/6));



stroke(cR,cG,cB,50);
noFill();
smooth();
triangle(x1,y1,x2,y2,x3,y3);

}
save("test2.tiff");
 

yes, as i understand it, opengl is limited by the size of your display device. so if your display is at 1920x1200 then the max size you can get is that many pixels (though it needn't be that dimension). the restriction is somewhere between the os and opengl.

there are some other threads on making big things (and setting memory for them) elsewhere on the board.

you shoudl be able to go a little higher than 2000x2000.. the issue is pixel count, not dimensions.. so you've got 4,864,000 pixels in your display, which should mean you can do 2400x2000 or something like that.