aboutsummaryrefslogtreecommitdiff
path: root/entity/utils.gbasm
blob: 23abb3a41b23c69e406e263852096ba81b5e6539 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
Get_Position_After_Move: ; entity (whatever alignement) in HL, direction to test in A, X Result in C, Y result in B
	PUSH HL
	PUSH AF

	LD A, L
	AND $f8
	LD L, A

	INC HL

	LD A, (HL+)
	LD C, A
	LD A, (HL+)
	LD B, A

	POP AF
	BIT 3, A
	JR Z, =Get_Position_After_Move.direction_end

	PUSH BC

	DEC A
	LD B, A

	SLA A
	AND $02
	DEC A

	BIT 1, B
	JR NZ, =Get_Position_After_Move.vertical

	Get_Position_After_Move.horizontal:
		POP BC
		ADD C
		LD C, A
		JR =Get_Position_After_Move.direction_end

	Get_Position_After_Move.vertical:
		POP BC
		ADD B
		LD B, A

	Get_Position_After_Move.direction_end:

	POP HL
	RET