Mixin' the Colors.

A random walk on the grid with three primary colors.

A random walk on the grid with three primary colors.

Description of this creative coding.

It's a creative coding work made with Processing featuring a Random Walk. It draws random walking paths with three primary colors.

When I was playing with a Random Walk, I found three primary colors of light turn to the trichromatic with blendMode(DIFFERENCE).
It creates various colors with mixing trichromatic. It looks nice, so I decided to make something with this.
A random walk with three primary colors of light.
With three primary colors of light.

A random walk with trichromatic.
With trichromatic.

The key of this code is drawing with vertex();. I skipped endShape() turn like this.
 int modCnt = stepCnt % (corners - 1);
 if (modCnt == 0) beginShape();
 ~
   vertex(wX, wY);
 ~
 if (modCnt == 1) endShape();
If you do not skip, you get no filling colors.
 beginShape();
   vertex(wX, wY);
 endShape();
An example that do not good.

But I liked this no filling results. So I added random choice of fill() or noFill().
 float fillAlp = (random(1.0) < 0.25) ? 0.0 : 100.0; // fill or not fill randomly
An example of choice of filling.
choice of fill().

An example of choice of no filling.
choice of noFill().

A example code of Processing.

This code does not display any images on the screen but generates image files in frames directory.
You can make an animation with these files.

Please feel free to use this example code.
To see other works based on my code is my pleasure. And my honor.


/**
 * Mixin' the Colors.
 * A random walk on the grid with three primary colors.
 * 
 * Processing 3.5.3
 * @author @deconbatch
 * @version 0.1
 * created 0.1 2020.06.06
 */

void setup() {
  size(980, 640);
  colorMode(HSB, 360, 100, 100, 100);
  rectMode(CENTER);
  smooth();
  noLoop();
}

void draw() {

  int corners    = 3; // initial corners of the shape
  int patternMax = 3; // draw 3 patterns
  
  strokeJoin(ROUND);
  translate(width * 0.5, height * 0.5);

  for (int pattern = 0; pattern < patternMax; pattern++) {
    corners += pattern; // 3, 4, 6
    int walkerMax = 9;
    int stepMax   = corners * 200;
    float sideLen = 8.0 - pattern * 2.5;
    float fillAlp = (random(1.0) < 0.25) ? 0.0 : 100.0; // fill or not fill randomly
    strokeWeight(corners * corners * corners * random(0.01, 0.05));

    // set walker
    ArrayList<Walker> walkers = new ArrayList<Walker>();
    for (int i = 0; i < walkerMax; i++) {
      float wX = sideLen * corners * i - (sideLen * corners * walkerMax) * 0.5;
      float wY = 0.0;
      float wS = random(80.0, 100.0);
      float wB = random(0.0, 40.0);
      float wD = TWO_PI / corners;
      int   wR = floor(random(corners));
      walkers.add(new Walker(wX, wY,   0.0, wS, wB, wD, wR)); // cyan
      walkers.add(new Walker(wX, wY, 120.0, wS, wB, wD, wR)); // magenta
      walkers.add(new Walker(wX, wY, 240.0, wS, wB, wD, wR)); // yellow
    }

    // draw walker
    blendMode(BLEND);
    background(0.0, 0.0, 90.0, 100.0);
    blendMode(DIFFERENCE);
    for (Walker walker : walkers) {
      float wX = walker.x;
      float wY = walker.y;
      float wC = walker.hueVal;
      float wS = walker.satVal;
      float wB = walker.briVal;
      float wD = walker.radianDiv;
      float wR = walker.rotateCnt;
      stroke(wC, wS, wB, 60.0);
      fill(wC, wS, wB, fillAlp);

      // random walk
      for(int stepCnt = 0; stepCnt < stepMax; stepCnt++) {
        /*
         * Key of this code!
         * if (modCnt == 0) beginShape();
         * if (modCnt == 1) endShape();
         */
        int modCnt = stepCnt % (corners - 1);
        if (modCnt == 0) beginShape();
        for (int j = 0; j < corners; j++) {
          wX += sideLen * cos(wR * wD);
          wY += sideLen * sin(wR * wD);
          vertex(wX, wY);
        }
        if (modCnt == 1) endShape();
        
        if (abs(wX) < width * 0.35 && abs(wY) < height * 0.35) {
          if (random(1.0) < 0.5) {
            --wR; // not turn
          } else {
            if (random(1.0) < 0.1) {
              wD *= -1.0; // turn
            }
          }
        }
        
        ++wR;
        wR %= corners;
      }
    }
    blendMode(BLEND);
    casing();
    saveFrame("frames/" + String.format("%04d", pattern + 1) + ".png");
  }

  exit();

}

/**
 * casing : draw fancy casing
 */
private void casing() {
  fill(0.0, 0.0, 0.0, 0.0);
  strokeWeight(20.0);
  stroke(0.0, 0.0, 0.0, 100.0);
  rect(0.0, 0.0, width, height);
  strokeWeight(15.0);
  stroke(0.0, 0.0, 100.0, 100.0);
  rect(0.0, 0.0, width, height);
}

/**
 * Walker : hold random walker attributes
 */
private class Walker {
  public float x, y;
  public float hueVal, satVal, briVal;
  public float radianDiv;
  public int   rotateCnt;

  Walker(float _x, float _y, float _c, float _s, float _b, float _d, int _r) {
    x = _x;
    y = _y;
    hueVal = _c;
    satVal = _s;
    briVal = _b;
    radianDiv = _d;
    rotateCnt = _r;
  }
}


/*
Copyright (C) 2020- deconbatch

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>
*/





I can play with the Node Garden also.
A node garden with trichromatic.


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