zirc - Zig raycaster fun

Age	Commit message (Collapse)	Author
2021-09-20	Render objects by writing pixels	tslil clingman
	This confines hardware acceleration to scaling and the background sprite. Unfortunately it would seem that to do proper object rendering (partial transparency) i'll have to implement colour mixing myself.
2021-09-20	Render walls by pixels, instead of using hard. accel. sprites	tslil clingman

2021-09-16	Corrected movement	tslil clingman

2021-09-12	Walk bob and collision detection	tslil clingman

2021-09-12	More efficient surface rendering!	tslil clingman
	Now, outside of sprites, every pixel on the screen is draw at most once. Hoorah. Unfortunately things still seem to be a little slow, perhaps its the z_buffer access or the fact that vertical floor slice drawing is bad?
2021-09-11	Render tops of low walls!	tslil clingman
	But it's very inefficient right now
2021-09-10	Re-organised code, moved all rendering into raycast.zig	tslil clingman

2021-09-10	Textures repeat rather than scale?	tslil clingman

2021-09-09	Don't override the skycylinder!	tslil clingman

2021-09-09	Added ceilings and pos_z to sprites (they can now be on the ceiling)	tslil clingman

2021-09-05	In response to issue #9629, correct usingnamespace usage	tslil clingman

2021-09-05	Changed map scaling, texture indexing, finished object rendering!	tslil clingman

2021-09-05	Sprite rendering skeleton!	tslil clingman
	Except that i'm not satisfied. It would appear that we're computing various distances more-or-less exactly in the sprite rendering process, but this is at odds with the walls and floors which -- by virtue of the linear interpolation garbage -- don't agree about where things are. The net result is that there are at least two fudge factors: - to account to for the incorrect height of the floors i shift the sprites up by 0.2 - to account for the incorrect wall distances i add 1 to the z_buffer comparison These fudges are ugly and empirical. Still to do: for more than one object we have to sort by distance first!
2021-09-04	Working on floor casting, but it's not quite right	tslil clingman
	The way floors are currently rendered the textures will always appear ``under'' the walls. This is not intended for shorter walls, the floor should be atop them. I might be able to fix this by switching to vertical scan-line rendering of floors -- although i understand that that is less efficient -- and doing this at the same time as wall rendering.
2021-09-01	Scale the projection plane to the screen correctly	tslil clingman
	Also bumped up the textures to 32x32
2021-09-01	Variable height walls!	tslil clingman

2021-09-01	Licensing stuff	tslil clingman

2021-09-01	Init	tslil clingman