Class: Entity::Gecko

Inherits:
Entity show all
Includes:
Comparable, Player
Defined in:
lib/game_2d/entity/gecko.rb

Constant Summary collapse

MAX_HP = 
1
BUILD_TIME =

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

7
BRAKE_SPEED =

Amount to decelerate each tick when braking

4
MOVES_FOR_KEY_HELD = 
{
  Gosu::KbLeft         => :slide_left,
  Gosu::KbA            => :slide_left,
  Gosu::KbRight        => :slide_right,
  Gosu::KbD            => :slide_right,
  Gosu::KbRightControl => :brake,
  Gosu::KbLeftControl  => :brake,
  Gosu::KbDown         => :build,
  Gosu::KbS            => :build,
}

Constants included from EntityConstants

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

Instance Attribute Summary collapse

Attributes included from Player

#complex_move, #player_name, #score

Attributes inherited from Entity

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

Instance Method Summary collapse

Methods included from Player

#add_move, #die, #draw, #draw_zorder, #initialize_player, #next_move, #perform_complex_move, #replace_player_entity, #to_s

Methods inherited from Entity

#above, #accelerate, #angle_to_vector, #beneath, #bottom_cell_y, #cx, #cy, #direction, #direction_to, #doomed?, #draw, #draw_angle, #draw_animation, #draw_image, #draw_zorder, #drop_diagonal, #empty_above?, #empty_on_left?, #empty_on_right?, #empty_underneath?, #entities_obstructing, #going_past_entity, #grab!, #grabbed?, #i_hit, #left_cell_x, #move, #move_x, #move_y, #moving?, #next_to, #occupied_cells, #on_left, #on_right, #opaque, #pixel_x, #pixel_y, #release!, #right_cell_x, #slide_around, #slow_by, #slower_speed, #teleportable?, #to_s, #top_cell_y, #underfoot, #vector_to_angle, #wake!, #warp

Methods included from ClassMethods

#bottom_cell_y_at, #constrain_velocity, #left_cell_x_at, #right_cell_x_at, #top_cell_y_at

Methods included from Transparency

#transparent?

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, #to_s

Constructor Details

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

Returns a new instance of Gecko.



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# File 'lib/game_2d/entity/gecko.rb', line 38

def initialize(player_name = "<unknown>")
  super
  initialize_player
  @player_name = player_name
  @score = 0
  @hp = MAX_HP
  @build_block_id = nil
  @build_level = 0
end

Instance Attribute Details

#build_block_id ⇒ Object

Returns the value of attribute build_block_id.



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# File 'lib/game_2d/entity/gecko.rb', line 36

def build_block_id
  @build_block_id
end

#hp ⇒ Object

Returns the value of attribute hp.



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# File 'lib/game_2d/entity/gecko.rb', line 36

def hp
  @hp
end

Instance Method Details

#all_state ⇒ Object 



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# File 'lib/game_2d/entity/gecko.rb', line 209

def all_state
  # Player name goes first, so we can sort on that
  super.unshift(player_name).push(
    score, @hp, build_block_id, @complex_move)
end

#as_json ⇒ Object 



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# File 'lib/game_2d/entity/gecko.rb', line 215

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

#brake ⇒ Object 



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# File 'lib/game_2d/entity/gecko.rb', line 122

def brake; slow_by BRAKE_SPEED; end

#build ⇒ Object

Create the actual block



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# File 'lib/game_2d/entity/gecko.rb', line 134

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
    if @space << bb # generates an ID
      @build_block_id = bb.registry_id
      @build_level = 0
    end
  end
end

#build_block ⇒ Object 



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# File 'lib/game_2d/entity/gecko.rb', line 60

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/entity/gecko.rb', line 58

def building?; @build_block_id; end

#check_for_disown_block ⇒ Object 



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# File 'lib/game_2d/entity/gecko.rb', line 154

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/entity/gecko.rb', line 71

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

#disown_block ⇒ Object 



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# File 'lib/game_2d/entity/gecko.rb', line 152

def disown_block; @build_block_id, @build_level = nil, 0; end

#fire(x_vel, y_vel) ⇒ Object

Create the actual pellet



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# File 'lib/game_2d/entity/gecko.rb', line 127

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/entity/gecko.rb', line 124

def flip; self.a += 180; end

#generate_move_from_click(x, y) ⇒ Object

Called by GameWindow Should return the move to be sent via ClientConnection (or nil)



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# File 'lib/game_2d/entity/gecko.rb', line 169

def generate_move_from_click(x, y)
  if y < cy # Firing up
    y_vel = -Math.sqrt(2 * (cy - y)).round
    x_vel = (cx - x) / y_vel
  else
    y_vel = 0
    if y == cy
      return if x == cx
      x_vel = (x <=> cx) * MAX_VELOCITY
    else
      range = x - cx
      x_vel = (Math.sqrt(1.0 / (2.0 * (y - cy))) * range).round
    end
  end
  [:fire, {:x_vel => x_vel, :y_vel => y_vel}]
end

#harmed_by(other, damage = 1) ⇒ Object 



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# File 'lib/game_2d/entity/gecko.rb', line 66

def harmed_by(other, damage=1)
  self.hp -= damage
  die if hp <= 0
end

#image_filename ⇒ Object 



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# File 'lib/game_2d/entity/gecko.rb', line 234

def image_filename; "gecko.png"; end

#move_for_keypress(keypress) ⇒ Object

Called by GameWindow Should return the move to be sent via ClientConnection (or nil) This is for queued keypresses, i.e. those that happen on key-down only (just once for a press), not continuously for as long as held down



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# File 'lib/game_2d/entity/gecko.rb', line 192

def move_for_keypress(keypress)
  case keypress
    when Gosu::KbUp, Gosu::KbW
      return building? ? :rise_up : :flip
  end
end

#moves_for_key_held ⇒ Object

Called by GameWindow Should return a map where the keys are… keys, and the values are the corresponding moves to be sent via ClientConnection This is for non-queued keypresses, i.e. those that happen continuously for as long as held down



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# File 'lib/game_2d/entity/gecko.rb', line 205

def moves_for_key_held
  MOVES_FOR_KEY_HELD
end

#rise_up ⇒ Object 



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# File 'lib/game_2d/entity/gecko.rb', line 162

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

#should_fall? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/game_2d/entity/gecko.rb', line 52

def should_fall?; underfoot.empty?; end

#sleep_now? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/game_2d/entity/gecko.rb', line 50

def sleep_now?; false; end

#slide(dir) ⇒ Object 



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# File 'lib/game_2d/entity/gecko.rb', line 114

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/entity/gecko.rb', line 111

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

#slide_right ⇒ Object 



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# File 'lib/game_2d/entity/gecko.rb', line 112

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

#update ⇒ Object 



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# File 'lib/game_2d/entity/gecko.rb', line 75

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

  return if perform_complex_move

  if falling = should_fall?
    self.a = 0
    space.fall(self)
  end

  args = next_move
  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
  blocks_underfoot = underfoot
  if blocks_underfoot.size == 1
    # Slide around if we're at the corner; otherwise, move normally
    slide_around(blocks_underfoot.first) or move
  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/entity/gecko.rb', line 225

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