ProcessingLite

This mini-project aims to recreate some basic processing functions in Unity3D, using a single drag and drop file.

This is made for Unity3D version 2020.2 or newer but is largely untested (It uses C# v8 stuff).

Usage / Installation

Download the ProcessingLite.cs file.
Drag and drop the ProcessingLite.cs file into your unity project.
(You don't need to add it to your scene)
Change inherence from the class MonoBehaviour to ProcessingLite.GP21.
(You will still have all MonoBehaviour functionality).
Use the supported commands in Start and/or Update functions.

Differences From Processing

Please note that the origin of the program will be different from processing. The camera is automatically moved so that origin is placed in the lower left corner of the screen.

The positions is measured in Unity Units and not pixels.

These changes have been made to make the future transition into Unity much easier.

Supported Commands

All these commands will not have full processing support (Example: rounded corners on rectangles). The base version of these commands should work.

Processing documentation

Environment

Height, this returns the height of the screen in Unity-units.
Width, this returns the width of the screen in Unity-units.

Shape

Attributes
- StrokeWeight(line width)
Vertex
- BeginShape()
- EndShape()
- Vertex(x, y)
2D primitives
- Circle(x, y, diameter)
- Ellipse(x, y, height, width)
- Line(x1, y1, x2, y2)
- Point(x, y)
- Quad(x1, y1, x2, y2, x3, y3, x4, y4)
- Rect(x1, y1, x2, y2)
- Square(x1, y1, size)
- Triangle(x1, y1, x2, y2, x3, y3)

Color

Background(color)
Fill(color)
NoFill()
NoStroke()
Stroke(color)

Input

MouseX
MouseY

Features covered by Unity

Some features from Processing will not be ported over since the already exist in Unity.

Data
Input (most of them)
Transform
Math and Constants
PVector

Test Code

In Unity, create a class called Test. Change the inheritance from MonoBehaviour to ProcessingLite.GP21 Run the program. If you see the word Hi, then it's working as intended.

using UnityEngine;

public class Test : ProcessingLite.GP21
{
  void Start()
  {
    Line(4, 7, 4, 3);
    Line(4, 5, 6, 5);
    Line(6, 7, 6, 3);
    Line(8, 5.5f, 8, 3);
    Line(8, 7, 8, 6.8f);
  }
}

Contributors

References

Processing

millennIumAMbiguity / ProcessingLite