In computer graphics, a particle system is a group of objects that are used to simulate a variety of "fuzzy" systems like smoke, liquid spray, fire, explosions, or other similar phenomena. Each particle is considered to be a point object with a position, but no size. Often, they are rendered as point sprites (using the GL_POINTS primitive mode), but could also be rendered as camera aligned quads or triangles. Each particle has a lifetime: it is born, animates according to a set of rules, and then dies. The particle can then be resurrected and go through the entire process again. Generally particles do not interact with other particles, or reflect light. The particle is often rendered as a single, textured, camera-facing ...
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