Draw.z80s

;
;	Use draw actually to display graphics. The automatic
;	frame rate compensation mechanisms mean that drawing
;	and updating are decoupled. See Update.z80s for the
;	code that updates the game from one discrete moment
;	to the next.
;

Draw:

;
;	The following are two test calls to my DrawPoly routine;
;	there's nothing else in the code that's smart enough
;	to clip polygons so they're not actually enabled for
;	3d (and would probably be too slow anyway)
;
;	call ClearDisplay
;			ld a, 4
;			ld b, 0xcc
;			ld hl, PolyVerticesX
;			call DrawPoly
;				ret
			
;			ld a, 4
;			ld b, 0xfc
;			ld hl, PolyVerticesX
;			call DrawPoly
;		ret


		; make new player matrix by setting a camera per
		; the rotations described in the player info block
			ld iy, PlayerInfoBlock
			call SetCamera_Rot3

		; if you wanted to see the version with just the
		; Cobra Mk3 (ie, not the stress test) then you'd
		; enable the jump below
		;
		; jr @+nostress

		; draw House
			ld iy, HouseBlock2
			call DrawModel_Rot3

		; a ret here would leave you with just the house,
		; so this is an alternative simple scene for
		; benchmarking.
		;
		; ret
			
		; draw House
			ld iy, HouseBlock1
			call DrawModel_Rot3

		; draw House
			ld iy, HouseBlock3
			call DrawModel_Rot3

		; draw House
			ld iy, HouseBlock4
			call DrawModel_Rot3

		; draw House
			ld iy, HouseBlock5
			call DrawModel_Rot3

@nostress:
		; draw Cobra Mk 3 model
			ld iy, CobraMk3Block
			call DrawModel_Rot3

		; this is an alternative jump into an alternative
		; model drawer that I was experimenting with (being
		; basically a precompiled model, with little
		; prewritten programs to handle arbitrary data
		; duplication); it ended up not being sufficiently
		; faster than the original to justify the effort
		;  so is currently disabled
;			ld iy, CobraMk3BlockNew
;			call DrawModel_Rot3New


	ret

;
;	Test tables are below that would be used by the test
;	DrawPoly call above. So these would establish a polygon
;	with vertices at (2, 70), (28, 20), (245, 30) and (5, 190)
;
;DS ALIGN 256
;PolyVerticesX:
;	db 2, 28, 245, 5
;	
;DS ALIGN 256
;PolyVerticesY:
;	db 70, 20, 30, 190