boyquotes/godot-physics-102

Godot 4 physics tests, benchmarks and lessons

Godot Physics 101

TLDR

This is a compilation of physical scenes and simulations for inspection and learning of GodotEngine physics.

Explanation

Since I started working with game engines, I have been interested in the implemented physical systems. Since I wanted to do 2D simulations, there were only few possibilities at that time (e.g. Box2D). Then I stumbled across the Godot Engine and was immediately convinced of its power. So I did a lot of testing in a lot of simple projects to get a grasp of the underlying mechanics. Now I would like to summarize my knowledge in one project/repository and make it understandable for others. So here we are: Godot Physics 101.

How it works

When running the project you'll get a welcome screen where you can choose one of the provided scenes. These encapsulate one aspect of Godots capabilities in simulating a physical world. You can start a scene, watch it running (or interacting with it) and read about its foundations in a description sidebar. There are scenes for 2D and 3D physics.

Examples are written for Godot 3.2-beta2. I will soon update to Godot 3.2 as it gets its stable release.

Overview

• General
  • [Main] - The main window for choosing the scenes
  • [Overlay] - An UI overlay for every scene
  • [Settings] - A window to quickly change some settings
  • [Documentation] - A quick link to the docs for every concept
• 2D
  • [Sandbox2D] - A sandbox to play with
  • [Physicsbodies2D] - Physicsbodies and their concepts
  • [Gravity2D] - Gravity and how to change it
• 3D
  • [Sandbox3D] - A sandbox to play with
  • [Physicsbodies3D] - Physicsbodies and their concepts
  • [Gravity3D] - Gravity and how to change it

Standing on the shoulder of giants

Here is a list of projects, which I will use as a basis for the compilation of examples:

Documentations

• Box2D Manual
• Unity Physics Docs
• Unreal Physics Docs
• CryEngine Physics Docs

Examples lists

• Bullet Physics Examples Explorer
• Processing
• Phaser.io
• LiquidFun
• PhyscsJS
• P2.js
• Planck.js
• Physijs
• Matter.js
• Cannon.js
• Ammo.js
• Oimo.js Demos and Oimo.js Web
• nphysics (2D) and nphysics (2D)

Learning platforms

• Leifiphysik (German)

FAQ

What is the license?

I have chosen the very permissive MIT license for this project. The icon is CC0 and downloaded from aiconica.

Are the examples mobile ready?

Could be. But I wouldn't bet on it. Just change to GLES2 and try it out.

Are the examples network ready?

As I'm using the Godot Physics Engine itself and don't care about states I would say: no. But you can try if you want and maybe I sometime add a network example somehow.