Processing-Tutorial: A Grid of Arcs

Published by on Saturday June 12, 2021

Last modified on September 7th, 2022 at 10:56

YouTube

By loading the video, you agree to YouTube’s privacy policy.
Learn more

Load video

In this tutorial, you’ll learn how to create a grid-based, flexible visual system of quarter circles in Processing. I’ll show you how to use the wave functions in Processing to influence the rotation of the individual grid cells.

Again, some very important concepts come together in this video: Loops, Nested Loops, Variables, Functions, Wave Movements, Conditional Statements, and Partial Circles.

At this point I would like to thank my friend Martin Lorenz, who inspired me a lot with his input on this topic. Martin will soon publish his book on Flexible Visual Systems, which I highly recommend here.

https://martinlorenz.com/
https://www.instagram.com/martinlorenz/

Enjoy the journey!

Best,
Tim


The code

color bg = #000000;
color fg = #ff0000;

void setup() {
  size(900, 900);
}

void draw() {
  background(bg);
  fill(fg);
  noStroke();

  float tilesX = 4;
  float tilesY = tilesX;

  float tileW = width / tilesX;
  float tileH = height / tilesY;

  for (int x = 0; x < tilesX; x++) {
    for (int y = 0; y < tilesY; y++) {
      float posX = tileW * x;
      float posY = tileH * y;

      float wave = sin(radians(frameCount + x * 10 + y * 10));
      float mappedWave = map(wave,-1,1,0,5);
      
      int selector = int(mappedWave);

      pushMatrix();
      translate(posX, posY);
      if (selector == 0) {
        arc(0, 0, tileW*2, tileH*2, radians(0), radians(90));
      } else if (selector == 1) {
        arc(tileW, 0, tileW*2, tileH*2, radians(90), radians(180));
      } else if (selector == 2) {
        arc(tileW, tileH, tileW*2, tileH*2, radians(180), radians(270));
      } else if (selector == 3) {
        arc(0, tileH, tileW*2, tileH*2, radians(270), radians(360));
      } else {
        rect(0, 0, tileW, tileH);
      }

      popMatrix();
    }
  }
}

Related

Getting started with Processing

Tutorials

Three ways to work with p5.js

Tutorials

Four essential Principles in any Programming Language

Tutorials unlisted Writings

I challenged Daniel Shiffman and here’s his response

Tutorials unlisted

Processing-Tutorial: Exploring Wave-Figures

Tutorials

Interactive Grid System (Livestream)

Tutorials

Processing-Tutorial: Render Videos with the Movie Maker

Tutorials

Processing-Tutorial – Programming Posters

Tutorials