Class: Player

Inherits:
Entity show all
Includes:
Comparable
Defined in:
lib/game_2d/player.rb

Overview

The base Player class representing what all Players have in common Moves can be enqueued by calling add_move Calling update() causes a move to be dequeued and executed, applying forces to the game object

The server instantiates this class to represent each connected player

Constant Summary collapse

BUILD_TIME =

Game ticks it takes before a block’s HP is raised by 1

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BRAKE_SPEED =

Amount to decelerate each tick when braking

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Constants included from EntityConstants

EntityConstants::CELL_WIDTH_IN_PIXELS, EntityConstants::MAX_VELOCITY, EntityConstants::PIXEL_WIDTH, EntityConstants::WIDTH

Instance Attribute Summary collapse

Attributes inherited from Entity

#a, #moving, #space, #x, #x_vel, #y, #y_vel

Instance Method Summary collapse

Methods inherited from Entity

#accelerate, #angle_to_vector, #bottom_cell_y, bottom_cell_y_at, #direction_to, #doomed?, #drop_diagonal, #empty_above?, #empty_on_left?, #empty_on_right?, #empty_underneath?, #entities_obstructing, #going_past_entity, #harmed_by, #i_hit, #left_cell_x, left_cell_x_at, #move, #move_x, #move_y, #moving?, #next_to, #occupied_cells, #opaque, #pixel_x, #pixel_y, #right_cell_x, right_cell_x_at, #should_fall?, #top_cell_y, top_cell_y_at, #vector_to_angle, #wake!, #warp

Methods included from Registerable

#nullsafe_registry_id, #registry_id, #registry_id=, #registry_id?, #registry_id_safe

Methods included from Serializable

#<=>, #==, as_json, #eql?, from_json, #hash, #to_json

Constructor Details

#initialize(player_name = "<unknown>") ⇒ Player

Returns a new instance of Player.


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# File 'lib/game_2d/player.rb', line 27

def initialize(player_name = "<unknown>")
  super
  @player_name = player_name
  @score = 0
  @moves = []
  @current_move = nil
  @falling = false
  @build_block_id = nil
  @build_level = 0
  @complex_move = nil
end

Instance Attribute Details

#build_block_id ⇒ Object

Returns the value of attribute build_block_id.


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# File 'lib/game_2d/player.rb', line 25

def build_block_id
  @build_block_id
end

#player_name ⇒ Object

Returns the value of attribute player_name.


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# File 'lib/game_2d/player.rb', line 24

def player_name
  @player_name
end

#score ⇒ Object

Returns the value of attribute score.


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# File 'lib/game_2d/player.rb', line 24

def score
  @score
end

Instance Method Details

#add_move(new_move) ⇒ Object

Accepts a hash, with a key :move => move_type


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# File 'lib/game_2d/player.rb', line 209

def add_move(new_move)
  return unless new_move
  @moves << new_move
end

#all_state ⇒ Object 


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# File 'lib/game_2d/player.rb', line 218

def all_state
  super.unshift(player_name).push(
    score, build_block_id, @complex_move)
end

#as_json ⇒ Object 


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# File 'lib/game_2d/player.rb', line 223

def as_json
  super.merge!(
    :player_name => player_name,
    :score => score,
    :build_block => @build_block_id,
    :complex_move => @complex_move.as_json
  )
end

#brake ⇒ Object 


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# File 'lib/game_2d/player.rb', line 151

def brake
  if @x_vel.zero?
    self.y_vel = brake_velocity(@y_vel)
  else
    self.x_vel = brake_velocity(@x_vel)
  end
end

#brake_velocity(v) ⇒ Object 


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# File 'lib/game_2d/player.rb', line 159

def brake_velocity(v)
  return 0 if v.abs < BRAKE_SPEED
  sign = v <=> 0
  sign * (v.abs - BRAKE_SPEED)
end

#build ⇒ Object

Create the actual block


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# File 'lib/game_2d/player.rb', line 177

def build
  if building?
    @build_level += 1
    if @build_level >= BUILD_TIME
      @build_level = 0
      build_block.hp += 1
    end
  else
    bb = Entity::Block.new(@x, @y)
    bb.owner_id = registry_id
    bb.hp = 1
    @space << bb # generates an ID
    @build_block_id = bb.registry_id
    @build_level = 0
  end
end

#build_block ⇒ Object 


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# File 'lib/game_2d/player.rb', line 49

def build_block
  return nil unless building?
  fail "Can't look up build_block when not in a space" unless @space
  @space[@build_block_id] or fail "Don't have build_block #{@build_block_id}"
end

#building? ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'lib/game_2d/player.rb', line 47

def building?; @build_block_id; end

#check_for_disown_block ⇒ Object 


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# File 'lib/game_2d/player.rb', line 196

def check_for_disown_block
  return unless building?
  return if @space.entities_overlapping(@x, @y).include?(build_block)
  build_block.owner_id = nil
  build_block.wake!
  disown_block
end

#destroy! ⇒ Object 


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# File 'lib/game_2d/player.rb', line 55

def destroy!
  build_block.owner_id = nil if building?
end

#disown_block ⇒ Object 


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# File 'lib/game_2d/player.rb', line 194

def disown_block; $stderr.puts "#{self} disowning #{build_block}"; @build_block_id, @build_level = nil, 0; end

#draw(window) ⇒ Object 


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# File 'lib/game_2d/player.rb', line 244

def draw(window)
  super
  window.font.draw_rel(player_name,
    pixel_x + CELL_WIDTH_IN_PIXELS / 2, pixel_y, ZOrder::Text,
    0.5, 1.0, # Centered X; above Y
    1.0, 1.0, Gosu::Color::YELLOW)
end

#draw_zorder ⇒ Object 


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# File 'lib/game_2d/player.rb', line 242

def draw_zorder; ZOrder::Player end

#falling? ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'lib/game_2d/player.rb', line 41

def falling?; @falling; end

#fire(x_vel, y_vel) ⇒ Object

Create the actual pellet


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# File 'lib/game_2d/player.rb', line 170

def fire(x_vel, y_vel)
  pellet = Entity::Pellet.new(@x, @y, 0, x_vel, y_vel)
  pellet.owner = self
  @space << pellet
end

#flip ⇒ Object 


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# File 'lib/game_2d/player.rb', line 165

def flip
  self.a += 180
end

#image_filename ⇒ Object 


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# File 'lib/game_2d/player.rb', line 240

def image_filename; "player.png"; end

#rise_up ⇒ Object 


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# File 'lib/game_2d/player.rb', line 204

def rise_up
  @complex_move = Move::RiseUp.new(self)
end

#sleep_now? ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'lib/game_2d/player.rb', line 39

def sleep_now?; false; end

#slide(dir) ⇒ Object 


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# File 'lib/game_2d/player.rb', line 143

def slide(dir)
  if opaque(next_to(dir)).empty?
    accelerate(*angle_to_vector(dir))
  else
    self.a = dir + 180
  end
end

#slide_left ⇒ Object 


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# File 'lib/game_2d/player.rb', line 140

def slide_left; slide(self.a - 90); end

#slide_right ⇒ Object 


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# File 'lib/game_2d/player.rb', line 141

def slide_right; slide(self.a + 90); end

#to_s ⇒ Object 


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# File 'lib/game_2d/player.rb', line 214

def to_s
  "#{player_name} (#{registry_id_safe}) at #{x}x#{y}"
end

#transparent_to_me?(other) ⇒ Boolean

Pellets don’t hit the originating player

Returns:

  • (Boolean) 

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# File 'lib/game_2d/player.rb', line 60

def transparent_to_me?(other)
  super ||
  (other == build_block) ||
  (other.is_a?(Pellet) && other.owner == self)
end

#update ⇒ Object 


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# File 'lib/game_2d/player.rb', line 66

def update
  fail "No space set for #{self}" unless @space
  check_for_disown_block

  if @complex_move
    # returns true if more work to do
    return if @complex_move.update(self)
    @complex_move.on_completion(self)
    @complex_move = nil
  end

  underfoot = next_to(self.a + 180)
  if @falling = underfoot.empty?
    self.a = 0
    accelerate(0, 1)
  end

  args = @moves.shift
  case (current_move = args.delete(:move).to_sym)
    when :slide_left, :slide_right, :brake, :flip, :build, :rise_up
      send current_move unless @falling
    when :fire
      fire args[:x_vel], args[:y_vel]
    else
      puts "Invalid move for #{self}: #{current_move}, #{args.inspect}"
  end if args

  # Only go around corner if sitting on exactly one object
  if underfoot.size == 1
    other = underfoot.first
    # Figure out where corner is and whether we're about to reach or pass it
    corner, distance, overshoot, turn = going_past_entity(other.x, other.y)
    if corner
      original_speed = @x_vel.abs + @y_vel.abs
      original_dir = vector_to_angle
      new_dir = original_dir + turn

      # Make sure nothing occupies any space we're about to move through
      if opaque(
        @space.entities_overlapping(*corner) + next_to(new_dir, *corner)
      ).empty?
        # Move to the corner
        self.x_vel, self.y_vel = angle_to_vector(original_dir, distance)
        move

        # Turn and apply remaining velocity
        # Make sure we move at least one subpixel so we don't sit exactly at
        # the corner, and fall
        self.a += turn
        overshoot = 1 if overshoot.zero?
        self.x_vel, self.y_vel = angle_to_vector(new_dir, overshoot)
        move

        self.x_vel, self.y_vel = angle_to_vector(new_dir, original_speed)
      else
        # Something's in the way -- possibly in front of us, or possibly
        # around the corner
        move
      end
    else
      # Not yet reaching the corner -- or making a diagonal motion, for which
      # we can't support going around the corner
      move
    end
  else
    # Straddling two objects, or falling
    move
  end

  # Check again whether we've moved off of a block
  # we were building
  check_for_disown_block
end

#update_from_json(json) ⇒ Object 


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# File 'lib/game_2d/player.rb', line 232

def update_from_json(json)
  @player_name = json[:player_name]
  @score = json[:score]
  @build_block_id = json[:build_block].try(:to_sym)
  @complex_move = Serializable.from_json(json[:complex_move])
  super
end