rototiller/.git - Collection of software-rendered graphics hacks supporting libdrm and SDL2

Age	Commit message (Collapse)	Author
2017-01-07	sparkler: add per-bsp (last) lookup cache	Vito Caputo
	This is a trivial optimization which makes a substantial difference. When we're doing things like explosions, thousands of occupants get added to the bsp tree at the exact same position. Without the lookup cache we end up traversing the octree down to its maximum depthrepeatedly, because the bv containing the explosion is of course full and maximally deep. Now explosions don't need to spend a bunch of time in the octree just to keep locating the same full bv the explosion occurs in.
2017-01-07	sparkler: prefer *.5 to / 2	Vito Caputo
	Multiplies tend to be less costly
2016-12-13	sparkler: introduce a particle system	Vito 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.