// P_2_1_2_02
//
// Generative Gestaltung, ISBN: 978-3-87439-759-9
// First Edition, Hermann Schmidt, Mainz, 2009
// Hartmut Bohnacker, Benedikt Gross, Julia Laub, Claudius Lazzeroni
// Copyright 2009 Hartmut Bohnacker, Benedikt Gross, Julia Laub, Claudius Lazzeroni
//
// http://www.generative-gestaltung.de
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/* changing module color and positions in a grid
 *      
 * MOUSE
 * position x          : offset x
 * position y          : offset y
 * left click          : random position
 * 
 * KEYS
 * 1-3                 : different sets of colors
 * 0                   : default
 * arrow up/down       : background module size
 * arrow left/right    : foreground module size
 * s                   : save png
 * p                   : save pdf
 */

var moduleColorBackground = 0;
var moduleColorForeground = 255;
var moduleAlphaBackground = 100;
var moduleAlphaForeground = 100;
var moduleRadiusBackground = 40;
var moduleRadiusForeground = 15;
var backColor = 255;
var tileCount = 20;
var actRandomSeed = 0;

function setup(){
  createCanvas(780, 780);

}

function draw() {
  push();
  translate(width/tileCount/2, height/tileCount/2);
  colorMode(HSB, 360, 100, 100, 100);
  background(backColor);
  smooth();
  noStroke();
  randomSeed(actRandomSeed);
  for (var gridY=0; gridY<tileCount; gridY++) {
    for (var gridX=0; gridX<tileCount; gridX++) {
      var posX = width/tileCount * gridX;
      var posY = height/tileCount * gridY;
      var shiftX =  random(-1, 1) * mouseX/20;
      var shiftY =  random(-1, 1) * mouseY/20;
      fill(moduleColorBackground, moduleAlphaBackground);
      ellipse(posX+shiftX, posY+shiftY, moduleRadiusBackground, moduleRadiusBackground);
    }
  }
  for (var gridY=0; gridY<tileCount; gridY++) {
    for (var gridX=0; gridX<tileCount; gridX++) {
      var posX = width/tileCount * gridX;
      var posY = height/tileCount * gridY;
      fill(moduleColorForeground, moduleAlphaForeground);
      ellipse(posX, posY, moduleRadiusForeground, moduleRadiusForeground);
    }
  }
  pop();
}

function mousePressed() {
  actRandomSeed = int(random(100000));
}

function keyTyped(){
    colorMode(HSB, 360, 100, 100, 100);
  if (key == 's' || key == 'S') save("P_2_1_2_02.png");

  if (key == '1'){
      moduleColorBackground = color(273, 73, 51);
   }
  if (key == '2'){
        moduleColorForeground = color(323, 100, 77);
    }
  if (key == '3'){
      moduleAlphaBackground = 50;
      moduleAlphaForeground = 50;
   }
  if (key == '0'){  
    moduleColorBackground = 0;
    moduleColorForeground = 360;
    moduleAlphaBackground = 100;
    moduleAlphaForeground = 100;
    moduleRadiusBackground = 30;
    moduleRadiusForeground = 15;
  }
}
  
function keyPressed(){
  if (keyCode == UP_ARROW) moduleRadiusBackground += 2;
  if (keyCode == DOWN_ARROW) moduleRadiusBackground = max(moduleRadiusBackground-2, 10);
  if (keyCode == LEFT_ARROW) moduleRadiusForeground = max(moduleRadiusForeground-2, 5);
  if (keyCode == RIGHT_ARROW) moduleRadiusForeground += 2;
}