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2016-12-13sparkler: introduce a particle systemVito Caputo
A while ago I made this particle system on SDL, and had the beginnings of an octree implemented within it, but never finished actually using the octree to accelerate the proximity searches. This now has the octree completed and of course more particle interactions now that neighbors could be found more quickly. The simulation somewhat resembles a fireworks display. Every particle is drawn as a single pixel. The visual effect is dominated by spontaneously spawned rockets which explode into thousands of particles accompanied by bursts that thrust particles away from the explosion radially in an expanding sphere resembling a shock wave. When the shock wave happens to strike another rocket, it explodes, resulting in another shock wave. This can produce spectacular chain reactions, so it's worth running for some time and seeing what transpires.
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