Einblick in die generative Gestaltung mit «Processing»

						/*
Autor: Rolf Stutz
Kurs: Einblick in die generative Gestaltung mit processing ip971311
Kursleitung: Hanna Zuellig
Veroeffentlicht unter der creative common license Attribution-NonCommercial-ShareAlike
CC BY-NC-SA  http://creativecommons.org/licenses/
*/
int color1 = 255;
int color2 = 0;

void setup() {
  size(500,500);
  background(color1);
  stroke(color2);
  smooth();

  
}

void draw() {
  if (mousePressed) {
    color1 = 0;
    color2 = 255;
  } else {
    color1 = 255;
    color2 = 0;
  }
  background(color1);
  stroke(color2);
  drawCercleAndQuad(0, 0, 500);
  drawCercleAndQuad(0, 0, 250);
  drawCercleAndQuad(0, 250, 250);
  drawCercleAndQuad(250, 0, 250);
  drawCercleAndQuad(250, 250, 250);
}

void drawCercleAndQuad(int x, int y, int len) {
  int l2 = len / 2;
  int widthEllipse = len / 5 * 4;
  fill(color2);
  ellipse(x + l2, y + l2, widthEllipse, widthEllipse);
  fill(color1);
  quad(x + l2, y, x + len, y + l2, x + l2, y + len, x, y + l2);
}

boolean isPointInPolygon(int x[], int y[],
          int px, int py) {
  int N = x.length;
  if (N < 3) {
    return false;
  }

  boolean odd = false;
  int x2 = x[N - 1];
  int y2 = y[N - 1];
  int x1, y1;
  for (int i = 0; i < N; x2 = x1, y2 = y1, ++i) {
    x1 = x[i];
    y1 = y[i];
    if (((y1 < py) && (y2 >= py)) || (y1 >= py) && (y2 < py)) {
      if ((py - y1) / (y2 - y1) * (x2 - x1) < (px - x1)) {
        odd = !odd;
      }
    }
  }
  return odd;
}

void createImages() {
  drawCercleAndQuad(0, 0, 500);
  drawCercleAndQuad(0, 0, 250);
  saveFrame("bild-11A.png");
  drawCercleAndQuad(0, 250, 250);
  drawCercleAndQuad(250, 0, 250);
  drawCercleAndQuad(250, 250, 250);
//  saveFrame("bild-11B.png");
}

void drawCat() {
  stroke(255);
  fill(0);
  triangle(0,0,50,50,0,100);
  triangle(50,50,100,0,100,100);
  quad(0,100,50,50,100,100,50,150);
  triangle(100,100,30,170,100,240);
}

void drawTangramOne() {
  stroke(255);
  line(0,0,375,375);
  line(500,0,0,500);
  line(500,250,250,500);
  line(125,375,250,500);
  line(375,125,375,375);
}