[RGSS/2/3] Hunger & Thirst - Hud

#==============================================================================
# ** Hunger Hud
#------------------------------------------------------------------------------
#  Author: ForeverZer0
#==============================================================================
class Hunger_HUD < Window_Base

  #====================================================================#
  #                    BEGIN CONFIGURATION                             #
  #====================================================================#

  # Define the colors used for each of the bars.
  HUNGER_EMPTY = Color.new(255, 0, 0)
  HUNGER_FULL = Color.new(0, 255, 0)

  THIRST_EMPTY = Color.new(96, 96, 96)
  THIRST_FULL = Color.new(128, 128, 255)

  BACKGROUND_COLOR = Color.new(0, 0, 0)

  # Define the type of bar used. (0 = Gradient, 1 = Transitional)
  # It would take longer to explain the differences than to just try each out.
  # There's only two as of the moment.
  BAR_STYLE = 0

  # Define the width and height, in pixels, of the bars.
  BAR_WIDTH = 128
  BAR_HEIGHT = 20

  # Define switch for active/visibility control within game.
  ONOFF_SWITCH = 10

  #====================================================================#
  #                     END CONFIGURATION                              #
  #====================================================================#
  #--------------------------------------------------------------------------
  # ● New Method: initialize
  #--------------------------------------------------------------------------
  def initialize(y = -12)
    super(0, y, Graphics.width, 96)
    # Set the windowskin's opacity to 0.
    @windowskin_org = self.windowskin
    self.windowskin = nil
    @colors1 = [HUNGER_EMPTY, HUNGER_FULL, BACKGROUND_COLOR]
    @colors2 = [THIRST_EMPTY, THIRST_FULL, BACKGROUND_COLOR]
    @actors = $game_party.members
    @function_stats ||= lambda do
      @actors.collect {|a| [a.hunger, a.max_hunger, a.thirst, a.max_thirst]}
    end
    @stats = @function_stats.call
    refresh
  end
  #--------------------------------------------------------------------------
  # ● New Method: refresh
  #--------------------------------------------------------------------------
  def refresh
    # Dispose the contents of the HUD.
    if self.contents != nil
      self.contents.dispose
      self.contents = nil
    end
    # Adjust width and location of window.
    self.height = @actors.size * (BAR_HEIGHT + 40)
    self.x = (Graphics.width - self.width) / 2
    self.contents = Bitmap.new(self.width, self.height)
    # Iterate actors.
    @actors.each_index do |i|
      actor = @actors[i]
      # Calculate locations for each actor's bars.
      x = 0
      y = i * (BAR_HEIGHT + 30)
      # Draw actor's name.
      self.contents.font.size = 16
      if self.respond_to?(:draw_actor_name)
        begin
          self.windowskin = @windowskin_org
          if self.method(:draw_actor_name).parameters.size == 4
            draw_actor_name(actor, x, y, BAR_WIDTH)
            draw_name = true
          elsif self.method(:draw_actor_name).parameters.size == 3
            draw_actor_name(actor, x, y)
            draw_name = true
          end
          self.windowskin = nil
        rescue
          draw_name = false
        end
      end
      self.contents.draw_text(x, y, BAR_WIDTH, 16, actor.name) unless draw_name
      # Draw hunger bars.
      w, h, rate, max = BAR_WIDTH, 8, @stats[i][0], @stats[i][1]
      self.contents.draw_bar_hunger(x, 16+y, w, h, rate, max, BAR_STYLE, @colors1)
      # Draw thirst bars.
      rate, max, height = @stats[i][2], @stats[i][3], 16+8+4
      self.contents.draw_bar_hunger(x, height+y, w, h, rate, max, BAR_STYLE, @colors2)
    end
  end
  #--------------------------------------------------------------------------
  # ● New Method: update
  #--------------------------------------------------------------------------
  def update
    self.visible = $game_switches[ONOFF_SWITCH]
    if self.visible
      if (@stats != @function_stats.call) || (@actors != $game_party.members)
        @stats, @actors = @function_stats.call, $game_party.members
        refresh
      end
    end
  end
end

#==============================================================================
# ** Bitmap
#------------------------------------------------------------------------------
#
#==============================================================================
class Bitmap
  #--------------------------------------------------------------------------
  # ● New Method: draw_bar_hunger
  #--------------------------------------------------------------------------
  def draw_bar_hunger(x, y, w, h, rate, max, style, colors = nil)
    # Set required instance variables.
    @bar_rect = Rect.new(x, y, w, h)
    @rate, @max, @style, @colors = rate, max, style, colors
    @fill_width_bar_hunger ||= lambda do
      ((@rate / @max.to_f) * (@bar_rect.width - 2)).round
    end
    # Define default colors if not defined. (RED <--> GREEN)
    @colors ||= [Color.new(255, 0, 0), Color.new(0, 255, 0), Color.new(0, 0, 0)]
    # Draw the background color.
    self.fill_rect(@bar_rect, @colors[2])
    # Branch by what style is being used.
    case @style
    when 0 then gradient_bar_hunger
    when 1 then transition_bar_hunger
    end
  end
  #--------------------------------------------------------------------------
  # ● New Method: gradient_bar_hunger
  #--------------------------------------------------------------------------
  def gradient_bar_hunger
    # Get the bar from the cache.
    key = [@style, @bar_rect.width-2, @bar_rect.height-2, @colors[0], @colors[1]]
    bar = LiTTleDRAgo.cache.gradient_bar(*key)
    # Draw the gradient bar using rectangular transfer.
    rect = Rect.new(0, 0, @fill_width_bar_hunger.call, @bar_rect.height)
    self.blt(@bar_rect.x+1, @bar_rect.y+1, bar, rect)
  end
  #--------------------------------------------------------------------------
  # ● New Method: transition_bar_hunger
  #--------------------------------------------------------------------------
  def transition_bar_hunger
    # Returns the color for current rate.
    c1 = [@colors[0].red, @colors[0].green, @colors[0].blue, @colors[0].alpha]
    c2 = [@colors[1].red, @colors[1].green, @colors[1].blue, @colors[1].alpha]
    rgba, rate = [],  1 - (@rate.to_f / @max)
    c1.each_index {|i| rgba[i] = c2[i] - ((c2[i] - c1[i]) * rate) }
    # Set the bars fill rate and color depending on value.
    rect = Rect.new(@bar_rect.x+1, @bar_rect.y+1,
                    @fill_width_bar_hunger.call, @bar_rect.height-2)
    self.fill_rect(rect, Color.new(*rgba))
  end
end

#==============================================================================
# ** Scene_Map
#------------------------------------------------------------------------------
#  This class performs the map screen processing.
#==============================================================================

class Scene_Map
  #--------------------------------------------------------------------------
  # ● Alias Listing
  #--------------------------------------------------------------------------
  unless method_defined?(:zer0_hunger_hud_main)
    alias_method :zer0_hunger_hud_main, :main
    alias_method :zer0_hunger_hud_upd, :update
  end
  #--------------------------------------------------------------------------
  # ● Aliased Method: main
  #--------------------------------------------------------------------------
  def main
    # Add the bars to Scene_Map.
    @hunger_hud = Hunger_HUD.new
    @hunger_hud.visible = $game_switches[Hunger_HUD::ONOFF_SWITCH]
    zer0_hunger_hud_main
    @hunger_hud.dispose unless @hunger_hud == nil || @hunger_hud.disposed?
  end
  #--------------------------------------------------------------------------
  # ● Aliased Method: update
  #--------------------------------------------------------------------------
  def update
    # Update the bars as needed.
    @hunger_hud.update
    zer0_hunger_hud_upd
  end
end
#==============================================================================
# ** Cache
#------------------------------------------------------------------------------
#  This module loads graphics, creates bitmap objects, and retains them.
# To speed up load times and conserve memory, this module holds the
# created bitmap object in the internal hash, allowing the program to
# return preexisting objects when the same bitmap is requested again.
#==============================================================================
ModCache = defined?(Window_ActorCommand) ? Cache : RPG::Cache
module ModCache
  #--------------------------------------------------------------------------
  # ● New Method: self.gradient_bar
  #--------------------------------------------------------------------------
  def self.gradient_bar(style, width, height, color1, color2)
    # Create a unique key to call the bar back with.
    path = [style, width, height, color1, color2]
    @cache ||= {}
    # Check if cache already has bitmap defined, if not create it now.
    if !@cache.include?(path) || @cache[path].disposed?
      bitmap, rates = Bitmap.new(width, height), []
      # Iterate through each pixel horizontally, setting a gradient color.
      c1 = [color1.red, color1.green, color1.blue, color1.alpha]
      c2 = [color2.red, color2.green, color2.blue, color2.alpha]
      # Draw the bar, having in transition from the first color to the second.
      c1.each_index {|i| rates[i] = (c1[i] - c2[i]).to_f / width }
      width.times do |i|
        values = [0, 1, 2, 3].collect {|j| c1[j] - (i * rates[j]) }
        # Set the color incrementally. This will be used later.
        bitmap.fill_rect(i, 0, 1, height, Color.new(*values))
      end
      @cache[path] = bitmap
    end
    # Return the created bitmap.
    return @cache[path]
  end
end