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160 lines
2.5 KiB
160 lines
2.5 KiB
INCLUDE "hardware.inc"
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INCLUDE "input.inc"
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INCLUDE "oam.inc"
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Section "Player Data", WRAM0
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playerWorldX: dw
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playerWorldY: dw
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Section "Player Code", ROM0
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spriteData:
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INCBIN "png/sprite/player.2bpp"
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DEF SPRITE_OAM_IDX EQU 0
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DEF SPRITE_IDX EQU 32 ; tile index, rename later
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DEF SPRITE_WIDTH EQU 2
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DEF SPRITE_HEIGHT EQU 2
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Player_Init::
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ld a, 8
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ld hl, _OAM + 1
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ld [hl], a
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ld bc, _VRAM8000 + SPRITE_IDX * 16
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ld hl, spriteData
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ld d, 16 * (SPRITE_WIDTH * SPRITE_HEIGHT)
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call memcpy
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OAM_set SPRITE_OAM_IDX + 0, 8, 144-8-8, SPRITE_IDX, 0
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OAM_set SPRITE_OAM_IDX + 1, 16, 144-8-8, SPRITE_IDX + 1, 0
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OAM_set SPRITE_OAM_IDX + 2, 8, 144-8, SPRITE_IDX + 2, 0
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OAM_set SPRITE_OAM_IDX + 3, 16, 144-8, SPRITE_IDX + 3, 0
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ld bc, _OAMRAM
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ld hl, _OAM
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ld d, 4 * (SPRITE_WIDTH * SPRITE_HEIGHT)
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call memcpy
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ret
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Player_Update::
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; Only update every 2 frames
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ld hl, frame
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ld a, [hl]
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and %1
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cp %1
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ret nz
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ld hl, keys
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ld b, [hl]
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; check for move right
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ld a, b
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and BTN_RIGHT
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jr z, .left
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; check for right boundary
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ld_OAM_x hl, SPRITE_OAM_IDX + 1
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ld a, [hl]
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cp SCRN_X
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jr nc, .left
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; TODO: check collision
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call move_right
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.left:
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; check for left button
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ld a, b
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and BTN_LEFT
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ret z
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; check for left boundary
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ld_OAM_x hl, SPRITE_OAM_IDX
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ld a, [hl]
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cp 9
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ret c
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; TODO: check collision
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call move_left
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ret
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move_right:
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ld_OAM_x hl, SPRITE_OAM_IDX
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; update top left sprite
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inc [hl]
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inc hl
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ld [hl], SPRITE_IDX
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inc hl
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res OAMB_XFLIP, [hl]
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; update top right sprite
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inc hl
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inc hl
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inc [hl]
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inc hl
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ld [hl], SPRITE_IDX + 1
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inc hl
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res OAMB_XFLIP, [hl]
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; update bottom left sprite
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inc hl
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inc hl
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inc [hl]
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inc hl
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ld [hl], SPRITE_IDX + 2
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inc hl
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res OAMB_XFLIP, [hl]
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; update bottom right sprite
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inc hl
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inc hl
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inc [hl]
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inc hl
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ld [hl], SPRITE_IDX + 3
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inc hl
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res OAMB_XFLIP, [hl]
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ret
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move_left:
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ld_OAM_x hl, SPRITE_OAM_IDX
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; top left
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dec [hl]
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inc hl
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ld [hl], SPRITE_IDX + 1
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inc hl
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set OAMB_XFLIP, [hl]
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; top right
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inc hl
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inc hl
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dec [hl]
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inc hl
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ld [hl], SPRITE_IDX
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inc hl
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set OAMB_XFLIP, [hl]
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; bottom left
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inc hl
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inc hl
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dec [hl]
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inc hl
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ld [hl], SPRITE_IDX + 3
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inc hl
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set OAMB_XFLIP, [hl]
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; bottom right
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inc hl
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inc hl
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dec [hl]
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inc hl
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ld [hl], SPRITE_IDX + 2
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inc hl
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set OAMB_XFLIP, [hl]
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ret
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