trying to create a diffusion limited aggregation in jogl... need guidance

[bhavin ragha]

hello im trying to create a diffusion limited aggregation in open gl... which is a model. it works by...

a seed (pixel) in the middle of the frame.
then an other pixel that randomly moves within the frame. and if it touches the seed point then sticks on it.

i have the seed pixel... and the other pixel moving round. how do i code...

if it touches the seed then stick?

right now i have this...

public void display(GLAutoDrawable gld) {
        
        GL gl = gld.getGL();
        
        gl.glClear(GL.GL_COLOR_BUFFER_BIT);
        
        boolean[][] dla = new boolean[N][N];        
        dla[20][25] = true;
        gl.glBegin(GL.GL_POINTS);
        gl.glVertex2i(20, 25);
        gl.glEnd();

        // random launching point
        int x = (int) (N * Math.random());
        int y = (int) (N * Math.random());

        // particle takes a 2d random walk

        double r = Math.random();
        if (r < 0.25) {
            x--;
        } else if (r < 0.50) {
            x++;
        } else if (r < 0.65) {
            y++;
        } else {
            y--;
        }
        
        showp(gl, x, y);
             
        
    }
    
    public void showp(GL gl, int xx, int yy) {
        
        gl.glBegin(GL.GL_POINTS);
        gl.glVertex2d(xx, yy);
        gl.glEnd();
    }

[Martin Vajsar]

Since this has nothing to do with JDBC, I've moved the thread to a better suited forum. Please see CarefullyChooseOneForum for further reference.

[Winston Gutkowski]

bhavin ragha wrote:hello im trying to create a diffusion limited aggregation in open gl... which is a model. it works by...
a seed (pixel) in the middle of the frame.
then an other pixel that randomly moves within the frame. and if it touches the seed point then sticks on it.

I'm no GUI expert, but this would seem to me to be an abstract problem that could be just as easily solved with a matrix of booleans or values, or an ordered set of coordinates (but please feel free to correct me if I'm wrong); so unless there are specific GUI objects (eg, a plotter-style class for the "movement") that would help with the solution, I'd be tempted to keep the problem code separate from any GUI.

Winston