fainges / fallingsandjava

Falling Sand Simulation implemented in Java. Every pixel is simulated every frame and has its own state and intrinsic motivations.

FallingSandJava

Falling sand simulation written in Java and LIBGDX

YouTube video tutorial on how to build this: https://youtu.be/5Ka3tbbT-9E

Overview:

Inspired by classic falling sand games I am making one of my own. The intent is to build and release a falling sand simulation simlar to the ones from the early 2000's. Plans past that are to create a local multiplayer combat game within the falling sand simulation taking influence from Duck Game and integrating the falling sand simulation with Box2D taking influence from Noita.

Online multiplayer would require extremely sophisticated systems to allow for smooth gameplay when each game object is one pixel square. This would be too much to synchronize with basic online implementations. However, With recent improvements in streaming online multiplayer should be possible through Steam Remote Play or Parsec.

Integrating Box2D

Integrating Box2D with a falling sand simulation presents unique technical challenges. The Noita developers have gone into some detail in their video Exploring the Tech and Design of Noita

The basic steps are:

• Take a 2D array of elements and use marching squares algorithm to get the contour
• Use a Douglas-Peucker line simplification algorithm to reduce the amount of vertices
• Pass the simplified set of vertices to a triangulation algorithm
• Create a Box2D rigidbody from all the resulting triangles
• If any elements in the rigidbody are destory repeat the process