# Exercise 53

## June 22, 2015 by Haig. Average Reading Time: about a minute.

// P_2_1_3_04.pde
//
// 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
/**
* changing positions of stapled circles in a grid
*
* MOUSE
* position x          : module detail
* position y          : module parameter
*
* KEYS
* 1-3                 : draw mode
* arrow left/right    : number of tiles horizontally
* arrow up/down       : number of tiles vertically
* s                   : save png
* p                   : save pdf
*/

import processing.pdf.*;
import java.util.Calendar;

boolean savePDF = false;

float tileCountX = 6;
float tileCountY = 6;
int count = 0;

int drawMode = 1;

void setup() {
size(550, 550);
}

void draw() {
if (savePDF) beginRecord(PDF, timestamp()+".pdf");

colorMode(HSB, 360, 100, 100);
rectMode(CENTER);
smooth();
stroke(0);
noFill();
background(360);

count = mouseX/10 + 10;
float para = (float)mouseY/height;

for (int gridY=0; gridY <= tileCountY; gridY++) {
for (int gridX=0; gridX <= tileCountX; gridX++) {

float tileWidth = width / tileCountX;
float tileHeight = height / tileCountY;
float posX = tileWidth*gridX + tileWidth/2;
float posY = tileHeight*gridY + tileHeight/2;

pushMatrix();
translate(posX, posY);

// switch between modules
switch (drawMode) {
case 1:
for(int i=0; i < count; i++) {
rect(0, 0, tileWidth, tileHeight);
scale(1 - 3.0/count);
rotate(para*0.1);
}
break;

case 2:
for(float i=0; i < count; i++) {
noStroke();
color gradient = lerpColor(color(0), color(52, 100, 71), i/count);
rotate(PI/4);
rect(0, 0, tileWidth, tileHeight);
scale(1 - 3.0/count);
rotate(para*1.5);
}
break;

case 3:
colorMode(RGB, 255);
for(float i=0; i < count; i++) {
noStroke();
color gradient = lerpColor(color(0, 130, 164), color(255), i/count);

pushMatrix();
translate(4*i,0);
ellipse(0, 0, tileWidth/4, tileHeight/4);
popMatrix();

pushMatrix();
translate(-4*i,0);
ellipse(0, 0, tileWidth/4, tileHeight/4);
popMatrix();

scale(1 - 1.5/count);
rotate(para*1.5);
}

break;
}

popMatrix();

}
}
if (savePDF) {
savePDF = false;
endRecord();
}
}

void keyReleased(){
if (key == 's' || key == 'S') saveFrame(timestamp()+"_##.png");
if (key == 'p' || key == 'P') savePDF = true;

if (key == '1') drawMode = 1;
if (key == '2') drawMode = 2;
if (key == '3') drawMode = 3;

if (keyCode == DOWN) tileCountY = max(tileCountY-1, 1);
if (keyCode == UP) tileCountY += 1;
if (keyCode == LEFT) tileCountX = max(tileCountX-1, 1);
if (keyCode == RIGHT) tileCountX += 1;

}

// timestamp
String timestamp() {
Calendar now = Calendar.getInstance();
return String.format("%1\$ty%1\$tm%1\$td_%1\$tH%1\$tM%1\$tS", now);
}