dime-story vasarely (processing sketch)

vasarely.dime.pde

// Inspired by Victor Vasarely*, I created a mechanistic color grid with inset squares or rectangles.
// The color palette was primarily built using a Complementary set of reds and greens, 
// with a hand-picked blue and yellow for added vibrancy.
// The algorithm prohibits the horizontal repetition of a background color, 
// and will not alow an inset-shape to be the same color as the background.

// * particularly by http://4.bp.blogspot.com/-JvA1kOVrVoQ/TbtLGxQ7fxI/AAAAAAAAAZU/n8wyXMlmDus/s1600/colour_vasarely5.jpg
// found, charmingly enough, at http://mrswagnersartideas.blogspot.com/2011/04/victor-vasarely.html

// two early palettes.
//color[] palette = {#FFAEAC, #DB91E8, #B6ACFF, #91C4E8, #9FFFE1}; // pastels
//color[] palette = {#B2004a, #FF1979, #FF0061, #00B209, #0EFF19}; // red-green pop
color[] palette = {#B2004a, #FF1979, #FF0061, #00B209, #0EFF19, #1E25FF, #FFF913 }; // red-green pop + blue + yellow

int width = 864;
int height = 720;
int blockSize = 72;
int circleOffset = blockSize / 2;
int innerBlockOffset = 10;
int innerCircleSize = blockSize - 10;
int innerBlockSize = blockSize - 20;

void setup() {
  size(width, height);
  background(#FFFFFF);
  noLoop();
  noStroke();
}

void draw() {
  int blockColor = -1;
  int eColor = -1;
  int eOffset = blockSize/2;
  for (int y = 0; y < height; y += blockSize) {
    for (int x = 0; x < width; x += blockSize) {
      blockColor = getNewIndex(blockColor);
      fill(palette[blockColor]);
      rect(x, y, blockSize, blockSize);
      eColor = getNewIndex(blockColor); // ellipse can't be same color as block
      // but we _can_ repeat ellipse colors from block to block
      fill(palette[eColor]);
      if (random(1) < 0.5) {
        ellipse(x + circleOffset, y + circleOffset, innerCircleSize, innerCircleSize);
      } else {
        rect(x + innerBlockOffset, y + innerBlockOffset, innerBlockSize, innerBlockSize);
      }
    }
  }
  
}


// don't repeat a color
// this is linear, and doesn't calculate for a grid. hoo-hah!
int getNewIndex(int prev) {
  int r = prev;
  while (r == prev) {
    r = int(random(0, palette.length));
  }
  //println("prev: " + prev + " next: " + r);
  return r;
}

// kinda dull, not going to use
// leaving in code for future reference
color inverseColor(color c) {
 return (color)#000000 - c; 
}