zirc/src, branch main Zig raycaster fun https://git.l-3.space/zirc/atom/src?h=main 2021-10-12T16:07:01Z More texture bugs, hoorah 2021-10-12T16:07:01Z tslil clingman 2021-10-12T15:57:23Z urn:sha1:2463aa73cb926bee528e0882bea28b3c2dcf6e60 Might as well also compute texel_y directly like texel_x for objects and skip a multiplication in favour of addition No need to recalculate the index inside each loop 2021-10-12T15:35:17Z tslil clingman 2021-10-12T15:35:17Z urn:sha1:1a00dd2342292e545d3aa26c2c0eadc80caedf5c Here's hoping Zig is smart enough (TM) to constant-ify all of these @floatToInt(type, PlaneXXX) values. Fix many texture bugs, access memory in increasing order everywhere 2021-10-12T02:56:39Z tslil clingman 2021-10-12T01:55:39Z urn:sha1:b21e399bd09577d2eef78d81c0db642ba4c390b7 - switch z_buffer to use screen space coordinates (why does y increase downward!) - extract pointless (re)calculations from inside hot loops, in particular from object drawing but also to the extent allowed by applicable law from floor and ceiling drawing Refactor: extract rendering code from Player struct into Renderer 2021-10-10T20:00:55Z tslil clingman 2021-10-10T19:31:36Z urn:sha1:cb15709551921e111d2648f7d6545e4d0e3fdcd6 Some bonus off by ones and rounding corrections Off by ones! 2021-10-10T16:58:17Z tslil clingman 2021-10-10T16:58:17Z urn:sha1:442f7210ea40f7f74b752575ee81b5f9394d6ea9 Fixed some artefacts for walls with both lower and upper parts 2021-10-09T01:38:41Z tslil clingman 2021-10-09T01:38:41Z urn:sha1:1aad9b2a1c5e86c8c6ea635772db5ddb20af39ed I can't quite explain it, but something about the way floating point numbers round meant that we weren't calculating consistent distances (in pixels) for the length of the strip between the top of the floor and the bottom of the ceiling in cells which had both. Variable height ceilings! 2021-10-07T15:33:36Z tslil clingman 2021-10-07T15:25:09Z urn:sha1:d4f2376bb0ea219b79dac3f4f37b77342ca6ef4a Plus bonus graphical artefacts around the edges of such! In the end the majority of this code was rather easy: take the upwards floor drawing code and reflect it. However, there were many edge-cases and plenty of off-by-one pixels and rounding issues that didn't quite work the same way going down as they do going up. Also the object drawing code used to take advantage of the fact that the z-buffer was painted bottom-up only, so that required change too. Better description 2021-09-30T01:35:09Z tslil clingman 2021-09-30T01:23:52Z urn:sha1:b44d2155e6a43b2abaf3c5c6d934d97ead72c099 remap controls 2021-09-27T01:32:03Z tslil clingman 2021-09-27T01:30:04Z urn:sha1:72dcaf8b2f811d0d1525592b2a1a63327b2fbc7a Of course i didn't need i32 ... 2021-09-26T16:10:44Z tslil clingman 2021-09-26T16:10:44Z urn:sha1:8ddc801e21bb02d0de20351f692b48e2e19c94c4