This is a series on fluid simulation for video games. This article explains how a vortex-based fluid simulation handles variable density in a fluid. The fluid flow includes motion because of buoyancy-heavier fluid sinks, and lighter fluid rises.
This is a series on fluid simulation for video games. This article explains how to integrate a fluid simulation into a typical particle system and introduces motion resulting from arbitrary external affectors (such as wind and forces).
Smoke is a multi-threaded game engine. Included in Smoke are procedurally generated trees & procedurally generated fire to generate a virtual burning forest. This paper explores Smoke's implementation of the Smart Particle Engine to set fire to trees.