a port of the Processing Visualization Language

Relativity

Each color is perceived in relation to other colors. The top and bottom bars each contain the same component colors, but a different display order causes individual colors to appear differently.

Original Processing.org Example: Relativity

// All Examples Written by Casey Reas and Ben Fry

// unless otherwise stated.

color a, b, c, d, e;



void setup() {

  size(200, 200);

  noStroke();

  a = color(165, 167, 20);

  b = color(77, 86, 59);

  c = color(42, 106, 105);

  d = color(165, 89, 20);

  e = color(146, 150, 127);

  noLoop();

}



void draw() {

  drawBand(a, b, c, d, e, 0, 4);

  drawBand(c, a, d, b, e, height/2, 4);

}



void drawBand(color v, color w, color x, color y, color z, int ypos, int barWidth) {

  int num = 5;

  color[] colorOrder = { v, w, x, y, z };

  for(int i = 0; i < width; i += barWidth*num) {

    for(int j = 0; j < num; j++) {

      fill(colorOrder[j]);

      rect(i+j*barWidth, ypos, barWidth, height/2);

    }

  }

}
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