diff options
Diffstat (limited to 'src/player.s')
| -rw-r--r-- | src/player.s | 22 |
1 files changed, 9 insertions, 13 deletions
diff --git a/src/player.s b/src/player.s index 9cb73f3..ebf6dfb 100644 --- a/src/player.s +++ b/src/player.s @@ -62,19 +62,15 @@ INIT_Y_POSITION_LO = ((Background::GROUND_Y_COORD - PLAYER_HEIGHT) & $0F) << 4 INIT_Y_POSITION_HI = (Background::GROUND_Y_COORD - PLAYER_HEIGHT) >> 4 - ;; The initial position on the X axis is more or less at the center. + ;; The initial position on the X axis is right below the mid platform. INIT_X_POSITION_LO = $00 - INIT_X_POSITION_HI = $07 + INIT_X_POSITION_HI = $08 ;; Different acceleration/velocity constants. - GRAVITY = $28 - THROTTLE_UP = $D8 - THROTTLE_LEFT = $D8 - THROTTLE_RIGHT = $28 - BLAST_OFF = $F8 ; Initial velocity from ground. - WALK_LEFT = $F8 - WALK_RIGHT = $08 - REDUCE_FULL_SPEED = $10 ; Next velocity after hitting a ceiling at full speed. + ;; + ;; NOTE: automatically generated via `bin/values.rb`. Check the + ;; `config/values.yml` to understand the meaning of each constant. + .include "../config/values/player.s" zp_screen_y = $40 zp_position_y = $41 ; NOTE: 16-bit. @@ -553,7 +549,7 @@ lda #REDUCE_FULL_SPEED bne @correct_vertical_velocity @reduced_velocity: - lda #8 + lda #REDUCE_MID_SPEED @correct_vertical_velocity: sta zp_velocity_y rts @@ -639,7 +635,7 @@ ;; game did. sec sbc #PLAYER_WIDTH - ldx #$E8 + ldx #BOUNCE_LEFT bne @horizontal_eject @left_collision: @@ -647,7 +643,7 @@ ;; need to add the tile width to it. clc adc #8 - ldx #$18 + ldx #BOUNCE_RIGHT @horizontal_eject: ;; The screen coordinate has been computed into the `a` register, and |