Class: Doom::Render::StatusBar

Inherits:
Object
  • Object
show all
Defined in:
lib/doom/render/status_bar.rb

Overview

Renders the classic DOOM status bar at the bottom of the screen

Constant Summary collapse

STATUS_BAR_HEIGHT = 
32
STATUS_BAR_Y = 
SCREEN_HEIGHT - STATUS_BAR_HEIGHT
AMMO_RIGHT_X =

DOOM status bar layout (from st_stuff.c) Positions from Chocolate Doom st_stuff.c (relative to status bar top)

44
HEALTH_RIGHT_X =

ST_AMMOX - right edge of 3-digit ammo

90
ARMOR_RIGHT_X =

ST_HEALTHX

221
ARMS_BG_X =

ST_ARMORX

104
ARMS_BG_Y =

ST_ARMSBGX

0
ARMS_X =

ST_ARMSBGY (relative to status bar)

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ARMS_Y =

ST_ARMSX

4
ARMS_XSPACE =

ST_ARMSY (relative to status bar)

12
ARMS_YSPACE = 
10
FACE_X =

Centered in face background area

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FACE_Y =

Vertically centered in status bar

2
KEYS_X =

ST_KEY0X

239
SMALL_AMMO_X =

Small ammo counts (right side of status bar)

288
SMALL_MAX_X =

Current ammo X

314
SMALL_AMMO_Y =

Max ammo X

[5, 11, 23, 17]
NUM_WIDTH =

Width of large digit

14
SMALL_NUM_WIDTH =

Width of small digit

4

Instance Method Summary collapse

Constructor Details

#initialize(hud_graphics, player_state) ⇒ StatusBar

Returns a new instance of StatusBar.



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# File 'lib/doom/render/status_bar.rb', line 36

def initialize(hud_graphics, player_state)
  @gfx = hud_graphics
  @player = player_state
  @face_timer = 0
  @face_index = 0
end

Instance Method Details

#render(framebuffer) ⇒ Object 



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# File 'lib/doom/render/status_bar.rb', line 43

def render(framebuffer)
  # Draw status bar background
  draw_sprite(framebuffer, @gfx.status_bar, 0, STATUS_BAR_Y) if @gfx.status_bar

  # Draw arms background (single-player only, replaces FRAG area)
  draw_sprite(framebuffer, @gfx.arms_background, ARMS_BG_X, STATUS_BAR_Y + ARMS_BG_Y) if @gfx.arms_background

  # Y position for numbers (3 pixels from top of status bar)
  num_y = STATUS_BAR_Y + 3

  # Draw ammo count (right-aligned ending at AMMO_RIGHT_X)
  draw_number_right(framebuffer, @player.current_ammo, AMMO_RIGHT_X, num_y) if @player.current_ammo

  # Draw health with percent
  draw_number_right(framebuffer, @player.health, HEALTH_RIGHT_X, num_y)
  draw_percent(framebuffer, HEALTH_RIGHT_X, num_y)

  # Draw weapon selector (2-7)
  draw_arms(framebuffer)

  # Draw face
  draw_face(framebuffer)

  # Draw armor with percent
  draw_number_right(framebuffer, @player.armor, ARMOR_RIGHT_X, num_y)
  draw_percent(framebuffer, ARMOR_RIGHT_X, num_y)

  # Draw keys
  draw_keys(framebuffer)

  # Draw small ammo counts (right side)
  draw_ammo_counts(framebuffer)
end

#update ⇒ Object 



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# File 'lib/doom/render/status_bar.rb', line 77

def update
  # Cycle face animation
  @face_timer += 1
  if @face_timer > 15  # Change face every ~0.5 seconds
    @face_timer = 0
    @face_index = (@face_index + 1) % 3
  end
end