//

// 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.

​

/**

 * draw tool. shows how to draw with dynamic elements. 

 * 

 * MOUSE

 * drag                : draw with text

 * 

 * KEYS

 * del, backspace      : clear screen

 * arrow up            : angle distortion +

 * arrow down          : angle distortion -

 * s                   : save png

​

 */

​

var x = 0, y = 0;

var stepSize = 5.0;

var letters = "Mon propos dans les pages qui suivent a plutôt été de décrire le reste : ce que l'on ne note généralement pas, ce qui ne se remarque pas, ce qui n'a pas d'importance : ce qui se passe quand il ne se passe rien, sinon du temps, des gens, des voitures et des nuages.";

var fontSizeMin = 3;

var angleDistortion = 0.0;

var counter = 0;

​

​

function setup() {

  // use full screen size 

  createCanvas(600, 600);

  background(255);

  smooth();

  cursor(CROSS);

  x = mouseX;

  y = mouseY;

​

  textAlign(LEFT);

  fill(0);

​

}

​

function draw() {

  if (mouseIsPressed) {

    var d = dist(x,y, mouseX,mouseY);

    textFont('Georgia');

    textSize(fontSizeMin+d/2)

    var newLetter = letters.charAt(counter);;

    stepSize = textWidth(newLetter);

​

    if (d > stepSize) {

      var angle = atan2(mouseY-y, mouseX-x); 

​

      push();

      translate(x, y);

      rotate(angle + random(angleDistortion));

      text(newLetter, 0, 0);

      pop();

​

      counter++;

     if (counter > letters.length-1) counter = 0;

​

      x = x + cos(angle) * stepSize;

      y = y + sin(angle) * stepSize; 

    }

  }

}

​

function mousePressed() {

  x = mouseX;

  y = mouseY;

}

​

function keyTyped() {

  if (key == 's' || key == 'S') save("P_2_3_3_01.png");

}

​

function keyPressed() {

  // angleDistortion ctrls arrowkeys up/down 

  if (keyCode == DELETE || keyCode == BACKSPACE) background(255);

  if (keyCode == UP_ARROW) angleDistortion += 0.1;

  if (keyCode == DOWN_ARROW) angleDistortion -= 0.1; 

}