zirc - Zig raycaster fun

Age	Commit message (Collapse)	Author
2021-10-12	More texture bugs, hoorahHEAD main	tslil clingman
	Might as well also compute texel_y directly like texel_x for objects and skip a multiplication in favour of addition
2021-10-12	No need to recalculate the index inside each loop	tslil clingman
	Here's hoping Zig is smart enough (TM) to constant-ify all of these @floatToInt(type, PlaneXXX) values.
2021-10-11	Fix many texture bugs, access memory in increasing order everywhere	tslil clingman
	- 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
2021-10-10	Refactor: extract rendering code from Player struct into Renderer	tslil clingman
	Some bonus off by ones and rounding corrections