Voronoi Pattern

jaspervanblokland

Hi All,

I do have a code for a voronoi pattern. Now i want to modify this where i can use predefined points (x and y axis). Is there somebody who can help me with this.

Thanks

        `  int i = 0;`
            int myw = 250;
            int myh = 250;
            int ncolors = 6;
            int[] seeds_x = new int[ncolors];
            int[] seeds_y = new int[ncolors];
            color[] seed_colors = new color[ncolors];

            int minDistance = 0;
            int minIndex = 0;


            void setup()
            {

                background(255);
                size(250, 250); 
                smooth();

                seed_colors[0] = color(255, 0, 0);
                seed_colors[1] = color(0, 255, 0);
                seed_colors[2] = color(0, 0, 255);
                seed_colors[3] = color(255, 255, 0);
                seed_colors[4] = color(255, 0, 255);
                seed_colors[5] = color(0, 255, 255);

                for(i=0; i < ncolors; i = i+1)
                {
                    seeds_x[i] = random(20, myw - 20);
                    seeds_y[i] = random(20, myh - 20);
                }

            } 

            void draw()
            {   

                for(int px = 0; px < myw; px = px +1)  {
                     for(int py = 0; py < myh; py = py +1)  {
                         minDistance = ((px  - seeds_x[0]) * (px - seeds_x[0])) +  ((py  - seeds_y[0]) * (py  - seeds_y[0]));
                         minIndex = 0;
                         for (int nc = 1; nc < ncolors; nc = nc+1){
                             int dist = ((px  - seeds_x[nc]) * (px - seeds_x[nc])) +  ((py  - seeds_y[nc]) * (py  - seeds_y[nc]));
                             if (dist <= minDistance) {
                                 minDistance = dist;
                                 minIndex = nc;
                            }
                        }
                        stroke(seed_colors[minIndex])
                        point(px, py);
                    }
                }
            }

Chrisir

question unclear

elaborate

kfrajer

Previous posts: https://forum.processing.org/two/search?Search=voronoi

Kf

jeremydouglass

What are your defined points, or where are they coming from?

Currently, you are randomizing your seeds here:

    for(i=0; i < ncolors; i = i+1)
    {
        seeds_x[i] = random(20, myw - 20);
        seeds_y[i] = random(20, myh - 20);
    }

...and if you had an array of PVectors that defined your data, instead you would be setting them like this:

    PVector myPoints[] = new PVector[10];
    ...
    for(i=0; i < ncolors; i = i+1)
    {
        seeds_x[i] = myPoints[i].x;
        seeds_y[i] = myPoints[i].y;
    }