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
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
Walking_Away: ; entity XY in BC, Breaks DE
; Is Bunny close enough to follow
LD A, $mem_bunny_x
SUB B
.ABS
CP $08
JR NC, =.Random_walker
LD A, $mem_bunny_y
SUB C
.ABS
CP $08
JR NC, =.Random_walker
JR =.Follow_bunny
.Random_walker:
CALL =RNG_Step
LD E, $00
RR A
RR E
SWAP E
AND $03
INC A
OR E
LD D, A
AND $07
SWAP A
OR D
LD D, A
JP =.Check_Collision
.Follow_bunny:
LD A, $mem_bunny_predicted_x
LD $tmp_var_1, A
LD A, $mem_bunny_predicted_y
LD $tmp_var_2, A
CALL =RNG_Step
AND $02
LD $tmp_var_3, A
CP $00
JR Z, =.skip_invert_axis
LD A, $mem_bunny_predicted_y
LD $tmp_var_1, A
LD A, $mem_bunny_predicted_x
LD $tmp_var_2, A
LD E, B
LD B, C
LD C, E
.skip_invert_axis:
; Choose direction
LD A, B
ADD $80
LD E, A
LD A, $tmp_var_1
ADD $80
CP E
JR Z =.Vertical
JR C =.Go_Left
.Go_Right:
LD A, $enum_direction_left
JR =.Check_Horizontal_Collision
.Go_Left:
LD A, $enum_direction_right
.Check_Horizontal_Collision:
LD E, A
DEC E
LD A, $tmp_var_3
XOR E
INC E
INC A
OR $08
PUSH BC
CALL =Get_Position_After_Move
CALL =Is_Collisionable
POP BC
CP $00
LD A, E
JR Z, =.Direction_check_end
.Vertical:
LD A, C
ADD $80
LD E, A
LD A, $tmp_var_2
ADD $80
CP E
JR Z =.No_movement
JR C =.Go_Up
.Go_Down:
LD A, $enum_direction_up
JR =.Direction_check_end
.Go_Up:
LD A, $enum_direction_down
.Direction_check_end:
DEC A
LD E, A
LD A, $tmp_var_3
XOR E
INC A
OR $08
LD D, A
AND $07
SWAP A
OR D
LD D, A
; Check collision
.No_movement:
LD A, $tmp_var_3
CP $00
JR Z, =.skip_invert_axis2
LD E, B
LD B, C
LD C, E
.skip_invert_axis2:
.Check_Collision:
PUSH BC
LD A, D
CALL =Get_Position_After_Move
CALL =Is_Collisionable
CALL =Carve_Entity_Collision_Map
POP BC
CP $00
RET Z
RES 3, D
RET
|
