515 lines
8.7 KiB
ArmAsm
515 lines
8.7 KiB
ArmAsm
;==================
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;==================
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; erase lemmings
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;==================
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;==================
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erase_lemming:
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ldy #0
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sty CURRENT_LEMMING
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erase_lemming_loop:
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ldy CURRENT_LEMMING
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lda lemming_out,Y
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beq done_erase_lemming
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lda lemming_y,Y
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sec
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sbc #6
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sta SAVED_Y1
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clc
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adc #15
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sta SAVED_Y2
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lda lemming_x,Y
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tax
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inx
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jsr hgr_partial_restore
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done_erase_lemming:
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inc CURRENT_LEMMING
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lda CURRENT_LEMMING
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cmp #MAX_LEMMINGS
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bne erase_lemming_loop
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rts
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;=========================
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;=========================
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; draw lemming
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;=========================
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;=========================
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draw_lemming:
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ldy #0
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sty CURRENT_LEMMING
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draw_lemming_loop:
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ldy CURRENT_LEMMING
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lda lemming_out,Y
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bne do_draw_countdown
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jmp done_draw_lemming
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do_draw_countdown:
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lda lemming_exploding,Y
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beq do_draw_lemming
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ldx lemming_exploding,Y
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dex
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lda countdown_sprites_l,X
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sta INL
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lda countdown_sprites_h,X
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sta INH
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ldx lemming_x,Y
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stx XPOS
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lda lemming_y,Y
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sec
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sbc #6
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sta YPOS
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jsr hgr_draw_sprite_autoshift
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do_draw_lemming:
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ldy CURRENT_LEMMING
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lda lemming_status,Y
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cmp #LEMMING_DIGGING
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beq draw_digging_sprite
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cmp #LEMMING_FALLING
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beq draw_falling_sprite
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cmp #LEMMING_EXPLODING
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beq draw_exploding_sprite
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cmp #LEMMING_PARTICLES
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beq draw_particles
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cmp #LEMMING_SPLATTING
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beq draw_splatting_sprite
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draw_walking_sprite:
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lda lemming_frame,Y
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and #$7
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tax
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lda lemming_direction,Y
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bpl draw_walking_right
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draw_walking_left:
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lda lwalk_sprite_l,X
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sta INL
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lda lwalk_sprite_h,X
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jmp draw_walking_common
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draw_walking_right:
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lda rwalk_sprite_l,X
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sta INL
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lda rwalk_sprite_h,X
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draw_walking_common:
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sta INH
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ldx lemming_x,Y
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stx XPOS
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lda lemming_y,Y
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jmp draw_common
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;====================
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; draw falling
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;====================
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draw_falling_sprite:
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lda lemming_frame,Y
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and #$3
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tax
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lda lemming_direction,Y
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bpl draw_falling_right
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draw_falling_left:
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lda lfall_sprite_l,X
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sta INL
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lda lfall_sprite_h,X
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jmp draw_falling_common
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draw_falling_right:
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lda rfall_sprite_l,X
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sta INL
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lda rfall_sprite_h,X
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draw_falling_common:
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sta INH
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ldx lemming_x,Y
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stx XPOS
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lda lemming_y,Y
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jmp draw_common
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;====================
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; draw exploding
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;====================
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draw_exploding_sprite:
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jsr handle_explosion
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jmp done_draw_lemming
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;====================
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; draw splatting
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;====================
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draw_splatting_sprite:
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jsr handle_splatting
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jmp done_draw_lemming
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;====================
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; draw particles
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;====================
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draw_particles:
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jsr handle_particles
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jmp done_draw_lemming
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;======================
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; digging
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draw_digging_sprite:
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lda lemming_frame,Y
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and #$7
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tax
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lda dig_sprite_l,X
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sta INL
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lda dig_sprite_h,X
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sta INH
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ldx lemming_x,Y
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stx XPOS
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lda lemming_y,Y
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sec
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sbc #2
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jmp draw_common
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draw_common:
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sta YPOS
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jsr hgr_draw_sprite_autoshift
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done_draw_lemming:
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inc CURRENT_LEMMING
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lda CURRENT_LEMMING
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cmp #MAX_LEMMINGS
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beq really_done_draw_lemming
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jmp draw_lemming_loop
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really_done_draw_lemming:
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rts
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lfall_sprite_l:
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.byte <lemming_lfall1_sprite,<lemming_lfall2_sprite
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.byte <lemming_lfall3_sprite,<lemming_lfall4_sprite
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lfall_sprite_h:
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.byte >lemming_lfall1_sprite,>lemming_lfall2_sprite
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.byte >lemming_lfall3_sprite,>lemming_lfall4_sprite
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rfall_sprite_l:
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.byte <lemming_rfall1_sprite,<lemming_rfall2_sprite
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.byte <lemming_rfall3_sprite,<lemming_rfall4_sprite
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rfall_sprite_h:
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.byte >lemming_rfall1_sprite,>lemming_rfall2_sprite
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.byte >lemming_rfall3_sprite,>lemming_rfall4_sprite
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dig_sprite_l:
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.byte <lemming_dig1_sprite,<lemming_dig2_sprite
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.byte <lemming_dig3_sprite,<lemming_dig4_sprite
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.byte <lemming_dig5_sprite,<lemming_dig6_sprite
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.byte <lemming_dig7_sprite,<lemming_dig8_sprite
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dig_sprite_h:
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.byte >lemming_dig1_sprite,>lemming_dig2_sprite
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.byte >lemming_dig3_sprite,>lemming_dig4_sprite
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.byte >lemming_dig5_sprite,>lemming_dig6_sprite
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.byte >lemming_dig7_sprite,>lemming_dig8_sprite
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rwalk_sprite_l:
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.byte <lemming_rwalk1_sprite,<lemming_rwalk2_sprite
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.byte <lemming_rwalk3_sprite,<lemming_rwalk4_sprite
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.byte <lemming_rwalk5_sprite,<lemming_rwalk6_sprite
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.byte <lemming_rwalk7_sprite,<lemming_rwalk8_sprite
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rwalk_sprite_h:
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.byte >lemming_rwalk1_sprite,>lemming_rwalk2_sprite
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.byte >lemming_rwalk3_sprite,>lemming_rwalk4_sprite
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.byte >lemming_rwalk5_sprite,>lemming_rwalk6_sprite
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.byte >lemming_rwalk7_sprite,>lemming_rwalk8_sprite
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lwalk_sprite_l:
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.byte <lemming_lwalk1_sprite,<lemming_lwalk2_sprite
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.byte <lemming_lwalk3_sprite,<lemming_lwalk4_sprite
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.byte <lemming_lwalk5_sprite,<lemming_lwalk6_sprite
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.byte <lemming_lwalk7_sprite,<lemming_lwalk8_sprite
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lwalk_sprite_h:
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.byte >lemming_lwalk1_sprite,>lemming_lwalk2_sprite
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.byte >lemming_lwalk3_sprite,>lemming_lwalk4_sprite
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.byte >lemming_lwalk5_sprite,>lemming_lwalk6_sprite
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.byte >lemming_lwalk7_sprite,>lemming_lwalk8_sprite
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exploding_sprite_l:
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.byte <lemming_explode1_sprite,<lemming_explode1_sprite
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.byte <lemming_explode2_sprite,<lemming_explode3_sprite
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.byte <lemming_explode4_sprite,<lemming_explode5_sprite
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.byte <lemming_explode6_sprite,<lemming_explode7_sprite
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.byte <lemming_explode8_sprite,<lemming_explode7_sprite
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.byte <lemming_explode9_sprite,<lemming_explode8_sprite
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.byte <lemming_explode9_sprite,<lemming_explode8_sprite
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.byte <lemming_explode9_sprite,<lemming_explode8_sprite
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exploding_sprite_h:
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.byte >lemming_explode1_sprite,>lemming_explode1_sprite
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.byte >lemming_explode2_sprite,>lemming_explode3_sprite
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.byte >lemming_explode4_sprite,>lemming_explode5_sprite
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.byte >lemming_explode6_sprite,>lemming_explode7_sprite
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.byte >lemming_explode8_sprite,>lemming_explode7_sprite
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.byte >lemming_explode9_sprite,>lemming_explode8_sprite
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.byte >lemming_explode9_sprite,>lemming_explode8_sprite
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.byte >lemming_explode9_sprite,>lemming_explode8_sprite
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; 787989898
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; clcrlrlrle
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countdown_sprites_l:
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.byte <countdown5_sprite,<countdown4_sprite,<countdown3_sprite
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.byte <countdown2_sprite,<countdown1_sprite
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countdown_sprites_h:
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.byte >countdown5_sprite,>countdown4_sprite,>countdown3_sprite
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.byte >countdown2_sprite,>countdown1_sprite
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splatting_sprite_l:
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.byte <lemming_splat1_sprite,<lemming_splat2_sprite
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.byte <lemming_splat3_sprite,<lemming_splat4_sprite
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.byte <lemming_splat5_sprite,<lemming_splat6_sprite
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.byte <lemming_splat7_sprite,<lemming_splat8_sprite
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splatting_sprite_h:
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.byte >lemming_splat1_sprite,>lemming_splat2_sprite
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.byte >lemming_splat3_sprite,>lemming_splat4_sprite
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.byte >lemming_splat5_sprite,>lemming_splat6_sprite
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.byte >lemming_splat7_sprite,>lemming_splat8_sprite
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;==========================
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; Handle particles
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;==========================
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handle_particles:
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jsr hgr_draw_particles
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ldy CURRENT_LEMMING
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lda lemming_frame,Y
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cmp #16
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bne still_going
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; TODO: partway through make lemming not out?
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lda #0
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sta lemming_out,Y
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clc ; mark as not exiting via door
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jsr remove_lemming ; remove the lemming
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still_going:
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not_done_particle:
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rts
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;==========================
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; Handle explosion
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;==========================
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; moved to make room
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handle_explosion:
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lda lemming_frame,Y
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cmp #$10
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bcc exploding_animation
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beq draw_explosion
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start_particles:
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lda #0
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sta lemming_frame,Y
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jsr init_particles
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; erase explosion
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ldy CURRENT_LEMMING
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lda lemming_y,Y
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sec
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sbc #16
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sta SAVED_Y1
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clc
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adc #32
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sta SAVED_Y2
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lda lemming_x,Y
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sec
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sbc #1
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tax
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inx
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inx
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inx
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jsr hgr_partial_restore
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; start particles
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ldy CURRENT_LEMMING
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lda #LEMMING_PARTICLES
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sta lemming_status,Y
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rts
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draw_explosion:
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; first erase pit in background art
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jsr hgr_hlin_page_toggle ; toggle to page2
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ldx #0
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sta HGR_COLOR
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ldy CURRENT_LEMMING
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; line from (x,a) to (x+y,a)
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lda lemming_x,Y
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asl
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adc lemming_x,Y
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asl
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adc lemming_x,Y ; multiply by 7
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tax
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pha
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lda lemming_y,Y
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clc
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adc #9
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ldy #7
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jsr hgr_hlin
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; line from (x,a) to (x+y,a)
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pla
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tax
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ldy CURRENT_LEMMING
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lda lemming_y,Y
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ldy #7
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clc
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adc #10
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jsr hgr_hlin
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jsr hgr_hlin_page_toggle ; toggle back to page1
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jsr click_speaker
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ldy #0
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lda #<explosion_sprite
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sta INL
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lda #>explosion_sprite
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sta INH
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ldy CURRENT_LEMMING
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ldx lemming_x,Y
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dex
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stx XPOS
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lda lemming_y,Y
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sec
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sbc #5
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; jmp draw_common
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jmp done_handle_exploding
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exploding_animation:
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; and #$f
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tax
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lda exploding_sprite_l,X
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sta INL
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lda exploding_sprite_h,X
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sta INH
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ldx lemming_x,Y
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stx XPOS
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lda lemming_y,Y
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; jmp draw_common
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done_handle_exploding:
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sta YPOS
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jsr hgr_draw_sprite_autoshift
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rts
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;==========================
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; Handle splatting
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;==========================
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; moved to make room
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handle_splatting:
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lda lemming_frame,Y
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cmp #$8
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beq done_splatting
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draw_splatting:
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jsr click_speaker
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tax
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lda splatting_sprite_l,X
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sta INL
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lda splatting_sprite_h,X
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sta INH
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ldx lemming_x,Y
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stx XPOS
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lda lemming_y,Y
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sta YPOS
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jsr hgr_draw_sprite_autoshift
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rts
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done_splatting:
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clc
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jsr remove_lemming ; FIXME: tail call
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rts
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