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|
Carve_Map: ; X in C, Y in B
PUSH BC
PUSH HL
LD A, C
AND $e0
JR NZ, =Carve_Map.end
LD A, B
AND $e0
JR NZ, =Carve_Map.end
LD A, C
LD H, $00
CP $10
RL B
AND $0f
CP $08
RL B
AND $07
LD L, A
LD C, B
LD B, high($mem_dungeon_map)
LD A, (BC)
OR (HL)
LD (BC), A
Carve_Map.end:
POP HL
POP BC
RET
Generation_Head_Mitosis:
PUSH HL
PUSH BC
LD A, $mem_next_free_head_lower_bytes
LD C, A
LD A, (HL)
DEC A
XOR $02
LD B, A
CALL =RNG_Step
AND $01
XOR B
INC A
LD B, high($mem_dungeon_generation_heads)
LD (BC), A
DEC A
XOR $01
INC A
LD (HL), A
INC HL
INC BC
LD A, (HL+)
LD (BC), A
INC BC
LD A, (HL+)
LD (BC), A
INC BC
LD A, C
LD $mem_next_free_head_lower_bytes, A
SLA E
SLA E
SLA E
POP BC
POP HL
RET
Enforce_Map_Bounds: ; X OR Y in A
CP $80
JR NC, =Enforce_Map_Bounds.Zero
CP $1f
JR NC, =Enforce_Map_Bounds.Thirty_one
RET
Enforce_Map_Bounds.Zero:
LD A, $00
RET
Enforce_Map_Bounds.Thirty_one:
LD A, $1f
RET
Generation_Head_Explosion:
PUSH HL
INC HL
LD A, (HL+)
LD E, A ; X
LD A, (HL+)
LD D, A ; Y
LD H, high($mem_room_list)
LD A, $mem_number_of_rooms
SLA A
SLA A
ADD low($mem_room_list)
LD L, A
LD A, E
CALL =RNG_Step
AND $03
ADD $06
LD B, A
SRA A
XOR $ff
INC A
ADD E
CALL =Enforce_Map_Bounds
LD E, A ; X
ADD B
CALL =Enforce_Map_Bounds
SUB E
LD B, A
LD A, E
LD (HL+), A
LD A, B ; X size
LD (HL+), A
LD A, D
CALL =RNG_Step
AND $03
ADD $06
LD C, A
SRA A
XOR $ff
INC A
ADD D
CALL =Enforce_Map_Bounds
LD D, A ; Y
ADD C
CALL =Enforce_Map_Bounds
SUB D
LD C, A
LD A, D
LD (HL+), A
LD A, C
LD (HL+), A
LD L, B
Room_Generation.X_loop:
LD H, C
Room_Generation.Y_loop:
PUSH BC
LD A, D
ADD H
LD B, A
LD A, E
ADD L
LD C, A
CALL =Carve_Map
POP BC
DEC H
LD A, H
CP $ff
JR NZ, =Room_Generation.Y_loop
DEC L
LD A, L
CP $ff
JR NZ, =Room_Generation.X_loop
POP HL
RET
Dungeon_Generation:
; Head initialization
LD HL, $mem_dungeon_generation_heads
CALL =RNG_Step
AND $03
INC A
LD (HL+), A
LD A, $10
LD (HL+), A
LD (HL+), A
LD C, A
LD B, A
CALL =Carve_Map
LD E, $intial_duplication_probablity
LD A, L
LD $mem_next_free_head_lower_bytes, A
LD A, $40
PUSH AF
.Step:
LD HL, $mem_dungeon_generation_heads
.Head_loop:
LD B, (HL)
LD A, B
CP $00
JR Z, =.Head_loop.end
LD A, E
CP $00
JR Z, =.Head_Mitosis.end
DEC A
LD C, A
CALL =RNG_Step
AND C
CP $00
CALL Z, =Generation_Head_Mitosis
.Head_Mitosis.end:
CALL =RNG_Step
AND $0f
JR NZ, =.Direction_Change.end
.Direction_Change:
DEC B
CALL =RNG_Step
AND $01
XOR B
XOR $02
INC A
LD B, A
LD (HL), B
.Direction_Change.end:
INC HL
LD C, (HL)
LD A, B
CP $enum_direction_left
JR NZ =.Left.end
.Left:
DEC C
.Left.end:
CP $enum_direction_right
JR NZ =.Right.end
.Right:
INC C
.Right.end:
LD A, C
AND $e0
JR NZ, =.DonT_Update_X
LD (HL), C
.DonT_Update_X:
INC HL
LD C, (HL)
LD A, B
CP $enum_direction_up
JR NZ =.Up.end
.Up:
DEC C
.Up.end:
CP $enum_direction_down
JR NZ =.Down.end
.Down:
INC C
.Down.end:
LD A, C
AND $e0
JR NZ, =.DonT_Update_Y
LD (HL), C
.DonT_Update_Y:
DEC HL
LD A, (HL+)
LD C, A
LD A, (HL+)
LD B, A
LD A, C
CALL =Carve_Map
JP =.Head_loop
.Head_loop.end:
POP AF
DEC A
PUSH AF
CP $00
JR NZ, =.Step
POP AF
LD HL, $mem_dungeon_generation_heads
.Head_explosion_loop:
LD B, (HL)
LD A, B
CP $00
JR Z, =.Head_explosion_loop.end
CALL =Generation_Head_Explosion
LD A, $mem_number_of_rooms
INC A
LD $mem_number_of_rooms, A
INC HL
INC HL
INC HL
JR =.Head_explosion_loop
.Head_explosion_loop.end:
RET
Reset_Map:
LD A, $00
LD $mem_next_free_head_lower_bytes, A
LD HL, $mem_dungeon_generation_heads
LD BC, $0280
JP =bzero
|
