#==============================================================================
# * Animated_Sprite                                Scripted by: RPG
#                                                  Edited by: cybersam
#
# i just removed the stuff that i dont need for my script...
# everything else is RPG's script... (here)
#
#------------------------------------------------------------------------------
#  A class for animated sprites.
#==============================================================================

class Animated_Sprite < RPG::Sprite
  #--------------------------------------------------------------------------
  # - Accessible instance variables.
  #--------------------------------------------------------------------------
  attr_accessor :frames        # Number of animation frames
  attr_accessor :delay         # Delay time between frames (speed)
  attr_accessor :frame_width   # Width of each frame
  attr_accessor :frame_height  # Height of each frame
  attr_accessor :offset_x      # X coordinate of the 1st frame
  attr_accessor :offset_y      # Y coordinate of all frames
  attr_accessor :current_frame # Current animation frame
  attr_accessor :moving        # Is the sprite moving?

  #--------------------------------------------------------------------------
  # - Initialize an animated sprite
  #   viewport : Sprite viewport
  #--------------------------------------------------------------------------
  def initialize(viewport = nil)
    super(viewport)
    @frame_width, @frame_height = 0, 0
    change    # A basic change to set initial variables
    @old = Graphics.frame_count  # For the delay method
    @goingup = true    # Increasing animation? (if @rm2k_mode is true)
    @once = false      # Is the animation only played once?
    @animated = true   # Used to stop animation when @once is true
  end

  #--------------------------------------------------------------------------
  # Comment by RPG
  #   - Change the source rect (change the animation)
  #   frames : Number of animation frames
  #   delay : Frame delay, controls animation speed
  #   offx : X coordinate of the 1st frame
  #   offy : Y coordinate of all frames
  #   startf : Starting frame for animation
  #   once : Is the animation only played once?
  #   rm2k_mode : Animation pattern: 1-2-3-2 if true, 1-2-3-1 if false
  #
  # Comment by cybersam
  #
  # the rm2k_mode isnt pressent anymore...
  # if you want that feature then use rm2k or use RPG's script...
  #--------------------------------------------------------------------------
  def change(frames = 0, delay = 0, offx = 0, offy = 0,
             startf = 0, once = false)
    @frames = frames
    @delay = delay
    @offset_x, @offset_y = offx, offy
    @current_frame = startf
    @once = once
    x = @current_frame * @frame_width + @offset_x
    self.src_rect = Rect.new(x, @offset_y, @frame_width, @frame_height)
    @goingup = true
    @animated = true
  end
  
  #--------------------------------------------------------------------------
  # - Update animation and movement
  #--------------------------------------------------------------------------
  def update
    super
    if self.bitmap != nil and delay(@delay) and @animated
      x = @current_frame * @frame_width + @offset_x
      self.src_rect = Rect.new(x, @offset_y, @frame_width, @frame_height)
        @current_frame = (@current_frame + 1) unless @frames == 0
        @animated = false if @current_frame == @frames and @once
        @current_frame %= @frames
    end
  end
  
  #--------------------------------------------------------------------------
  # - Move the sprite
  #   x : X coordinate of the destination point
  #   y : Y coordinate of the destination point
  #   speed : Speed of movement (0 = delayed, 1+ = faster)
  #   delay : Movement delay if speed is at 0
  #--------------------------------------------------------------------------
  def move(x, y, speed = 1, delay = 0)
    @destx = x
    @desty = y
    @move_speed = speed
    @move_delay = delay
    @move_old = Graphics.frame_count
    @moving = true
  end
  
  #--------------------------------------------------------------------------
  # - Move sprite to destx and desty
  #--------------------------------------------------------------------------
  def update_move
    return unless @moving
    movinc = @move_speed == 0 ? 1 : @move_speed
    if Graphics.frame_count - @move_old > @move_delay or @move_speed != 0
      self.x += movinc if self.x < @destx
      self.x -= movinc if self.x > @destx
      self.y += movinc if self.y < @desty
      self.y -= movinc if self.y > @desty
      @move_old = Graphics.frame_count
    end
    if @move_speed > 1  # Check if sprite can't reach that point
      self.x = @destx if (@destx - self.x).abs % @move_speed != 0 and
                         (@destx - self.x).abs <= @move_speed
      self.y = @desty if (@desty - self.y).abs % @move_speed != 0 and
                         (@desty - self.y).abs <= @move_speed
    end
    if self.x == @destx and self.y == @desty
      @moving = false
    end
  end
  
  #--------------------------------------------------------------------------
  # - Pause animation, but still updates movement
  #   frames : Number of frames
  #--------------------------------------------------------------------------
  def delay(frames)
    update_move
    if (Graphics.frame_count - @old >= frames)
      @old = Graphics.frame_count
      return true
    end
    return false
  end
end