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JavaScript

4 years ago
// P_3_1_3_02
//
// Generative Gestaltung Creative Coding im Web
// ISBN: 978-3-87439-902-9, First Edition, Hermann Schmidt, Mainz, 2018
// Benedikt Groß, Hartmut Bohnacker, Julia Laub, Claudius Lazzeroni
// with contributions by Joey Lee and Niels Poldervaart
// Copyright 2018
//
// 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.
/**
* analysing and sorting the letters of a text
* connecting subsequent letters with lines
*
* MOUSE
* position x : interpolate between normal text and sorted position
*
* KEYS
* 1 : toggle lines on/off
* 2 : toggle text on/off
* 3 : switch all letters off
* 4 : switch all letters on
* a-z : switch letter on/off
* CONTROL : save png
*/
'use strict';
var joinedText;
var alphabet;
var drawLetters = [];
var posX;
var posY;
var drawLines = false;
var drawText = true;
function preload() {
joinedText = loadStrings('data/library_babel_extract1.txt');
}
function setup() {
createCanvas(1920, windowHeight);
textFont('monospace', 30);
fill(0);
joinedText = joinedText.join(' ');
alphabet = getUniqCharacters();
for (var i = 0; i < alphabet.length; i++) {
drawLetters[i] = true;
}
}
function draw() {
background(213,204,255);
posX = 20;
posY = 40;
var oldX = 0;
var oldY = 0;
// go through all characters in the text to draw them
for (var i = 0; i < joinedText.length; i++) {
// again, find the index of the current letter in the character set
var upperCaseChar = joinedText.charAt(i).toUpperCase();
var index = alphabet.indexOf(upperCaseChar);
if (index < 0) continue;
var sortY = index * 20 + 40;
var m = map(mouseX, 50, width - 50, 0, 1);
m = constrain(m, 0, 1);
var interY = lerp(posY, sortY, m);
if (drawLetters[index]) {
if (drawLines) {
if (oldX != 0 && oldY != 0) {
stroke(181, 157, 0, 100);
line(oldX, oldY, posX, interY);
}
oldX = posX;
oldY = interY;
}
if (drawText) {
noStroke();
text(joinedText.charAt(i), posX, interY);
}
} else {
oldX = 0;
oldY = 0;
}
posX += textWidth(joinedText.charAt(i));
if (posX >= width - 200 && upperCaseChar == ' ') {
posY += 30;
posX = 20;
}
}
}
function getUniqCharacters() {
var charsArray = joinedText.toUpperCase().split('');
var uniqCharsArray = charsArray.filter(function(char, index) {
return charsArray.indexOf(char) == index;
}).sort();
return uniqCharsArray.join('');
}
function keyReleased() {
if (keyCode == CONTROL) saveCanvas(gd.timestamp(), 'png');
if (key == '1') drawLines = !drawLines;
if (key == '2') drawText = !drawText;
if (key == '3') {
for (var i = 0; i < alphabet.length; i++) {
drawLetters[i] = false;
}
}
if (key == '4') {
drawText = true;
for (var i = 0; i < alphabet.length; i++) {
drawLetters[i] = true;
}
}
var index = alphabet.indexOf(key.toUpperCase());
if (index >= 0) {
drawLetters[index] = !drawLetters[index];
}
}