mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-07-01 18:29:27 +00:00
a941e5a3df
horrible code but seems to work now also room limits are +128 now because I am not smart enough to figure out signed compare on 6502
359 lines
4.5 KiB
ArmAsm
359 lines
4.5 KiB
ArmAsm
pstate_table_lo:
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.byte <physicist_standing ; 00
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.byte <physicist_walking ; 01
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.byte <physicist_running ; 02
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.byte <physicist_crouching ; 03
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.byte <physicist_kicking ; 04
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.byte <physicist_jumping ; 05
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.byte <physicist_collapsing ; 06
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.byte <physicist_falling ; 07
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pstate_table_hi:
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.byte >physicist_standing
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.byte >physicist_walking
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.byte >physicist_running
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.byte >physicist_crouching
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.byte >physicist_kicking
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.byte >physicist_jumping
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.byte >physicist_collapsing
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.byte >physicist_falling
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; Urgh, make sure this doesn't end up at $FF or you hit the
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; NMOS 6502 bug
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.align 2
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pjump:
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.word $0000
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.align 1
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;======================================
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; draw physicist
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;======================================
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draw_physicist:
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ldx PHYSICIST_STATE
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lda pstate_table_lo,x
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sta pjump
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lda pstate_table_hi,x
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sta pjump+1
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jmp (pjump)
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;==================================
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; STANDING
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;==================================
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physicist_standing:
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lda #<phys_stand
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sta INL
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lda #>phys_stand
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sta INH
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jmp finally_draw_him
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;==================================
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; KICKING
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;==================================
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physicist_kicking:
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lda #<kick1
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sta INL
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lda #>kick1
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sta INH
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; If kicking long enough, return to standing
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dec GAIT
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bne short_draw
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lda #P_STANDING
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sta PHYSICIST_STATE
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short_draw:
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jmp finally_draw_him
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;===================================
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; CROUCHING
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;===================================
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physicist_crouching:
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; FIXME: we have an animation?
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lda #<crouch2
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sta INL
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lda #>crouch2
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sta INH
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jmp finally_draw_him
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;===================================
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; JUMPING
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;===================================
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physicist_jumping:
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lda GAIT
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cmp #32
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bcc still_jumping ; blt
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lda #0
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sta GAIT
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lda #P_STANDING
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sta PHYSICIST_STATE
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jmp physicist_walking
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still_jumping:
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lsr
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and #$fe
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tax
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lda phys_jump_progression,X
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sta INL
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lda phys_jump_progression+1,X
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sta INH
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inc GAIT
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lda GAIT
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and #$7
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bne jump_no_move
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lda DIRECTION
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beq jump_left
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jump_right:
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inc PHYSICIST_X
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jmp finally_draw_him
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jump_left:
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dec PHYSICIST_X
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jump_no_move:
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jmp finally_draw_him
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;===============================
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; Walking
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;================================
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physicist_walking:
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lda GAIT
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cmp #40
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bcc gait_fine ; blt
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lda #0
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sta GAIT
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gait_fine:
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lsr
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and #$fe
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tax
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lda phys_walk_progression,X
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sta INL
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lda phys_walk_progression+1,X
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sta INH
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jmp finally_draw_him
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;===============================
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; Running
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;================================
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physicist_running:
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lda GAIT
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cmp #40
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bcc run_gait_fine ; blt
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lda #0
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sta GAIT
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run_gait_fine:
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lsr
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and #$fe
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tax
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lda phys_run_progression,X
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sta INL
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lda phys_run_progression+1,X
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sta INH
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jmp finally_draw_him
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;==================================
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; COLLAPSING
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;==================================
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physicist_collapsing:
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lda GAIT
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cmp #18
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bne collapse_not_done
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really_dead:
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lda #$ff
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sta GAME_OVER
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jmp finally_draw_him
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collapse_not_done:
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ldx GAIT
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lda collapse_progression,X
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sta INL
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lda collapse_progression+1,X
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sta INH
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lda FRAMEL
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and #$1f
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bne no_collapse_progress
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inc GAIT
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inc GAIT
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no_collapse_progress:
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jmp finally_draw_him
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;==================================
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; FALLING
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;==================================
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physicist_falling:
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lda FRAMEL
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and #$3
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bne no_fall_progress
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inc PHYSICIST_X
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inc PHYSICIST_Y ; must me mul of 2
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inc PHYSICIST_Y
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no_fall_progress:
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lda PHYSICIST_Y
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cmp #22
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bne still_falling
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done_falling:
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; lda #0
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; sta GAIT
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lda #P_CROUCHING
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sta PHYSICIST_STATE
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jmp physicist_crouching
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still_falling:
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lda #<phys_falling
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sta INL
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lda #>phys_falling
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sta INH
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jmp finally_draw_him
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;=============================
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; Actually Draw Him
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;=============================
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finally_draw_him:
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lda PHYSICIST_X
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sta XPOS
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lda PHYSICIST_Y
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sec
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sbc EARTH_OFFSET ; adjust for earthquakes
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sta YPOS
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lda DIRECTION
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bne facing_right
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facing_left:
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jmp put_sprite_crop
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facing_right:
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jmp put_sprite_flipped_crop
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;======================================
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; Check screen limits
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;======================================
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check_screen_limit:
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clc
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lda PHYSICIST_X
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adc #$80
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cmp LEFT_LIMIT
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bcs just_fine_left ; (bge==bcs)
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too_far_left:
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lda #1
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sta GAME_OVER
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rts
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just_fine_left:
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; Check right edge of screen
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; lda PHYSICIST_X
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cmp RIGHT_LIMIT
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bcc just_fine_right ; blt
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too_far_right:
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lda #2
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sta GAME_OVER
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just_fine_right:
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rts
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; LIMIT VALUE FLAGS
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; 0 10 -----
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; 0 0 Z----
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; 0 FF
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; 1 -> 129
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; 0 -> 128
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; -1 -> 127 FF + 80 = 7f
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; XPOS XSIZE XMAX
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; -5 8 3
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; -4 4
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; -3 5
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; -2 6
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; -1 7
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; 0 8
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; 1 9
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; 2
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; 3
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; 4
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; 5
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