Class: RoadToRubykaigi::Sprite::Player

Inherits:
Object
  • Object
show all
Defined in:
lib/road_to_rubykaigi/sprite/player.rb

Constant Summary collapse

WALK_ACCEL = 
15.0
WALK_MAX_SPEED = 
20.0
WALK_FRICTION = 
1.0
RUNNING_SPEED_THRESHOLD = 
1.3
RUNNING_SUSTAIN_SECOND = 
0.3
INITIAL_X = 
{ 2025 => 10, 2026 => 40 }
WARMUP_END_X = 
{ 2025 => 18, 2026 => 48 }
WARMUP_SPEED_RATIO_CAP = 
1.0
BASE_Y = 
26
INITIAL_Y = 
{ 2025 => BASE_Y, 2026 => 15 }
BASE_HEIGHT = 
3
JUMP_INITIAL_VELOCITY = 
-40.0
JUMP_GRAVITY = 
80.0
ATTACK_COOLDOWN_SECOND = 
0.1
KEY_INPUT_THRESHOLD = 
0.5
ANIMETION_FRAME_SECOND = 
0.25
STUN_SECOND = 
2.0
CROUCH_SECOND = 
1.0
RIGHT = 
1
LEFT = 
-1

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#vy ⇒ Object

Returns the value of attribute vy.



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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 5

def vy
  @vy
end

#x ⇒ Object (readonly)

Returns the value of attribute x.



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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 4

def x
  @x
end

#y ⇒ Object (readonly)

Returns the value of attribute y.



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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 4

def y
  @y
end

Instance Method Details

#attack(attacks) ⇒ Object 



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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 76

def attack(attacks)
  attacks.add(self)
  @last_attack_time = Time.now
end

#attack_position ⇒ Object 



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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 81

def attack_position
  x_position = current_direction == RIGHT ? x + width : x - 2
  y_position = crouching? ? y + 2 : y + 1
  [x_position, y_position]
end

#bounding_box ⇒ Object 



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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 182

def bounding_box
  { x: @x, y: @y, width: width, height: height }
end

#build_buffer(offset_x:) ⇒ Object 



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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 162

def build_buffer(offset_x:)
  buffer = Array.new(Map::VIEWPORT_HEIGHT) { Array.new(Map::VIEWPORT_WIDTH) { "" } }
  relative_x = @x - offset_x - 1
  relative_y = @y + (BASE_HEIGHT - height) - 1
  current_character[@walking_frame].each_with_index do |row, i|
    row.each_with_index do |character, j|
      buffer[relative_y+i][relative_x+j] = character
    end
  end
  buffer
end

#can_attack! ⇒ Object 



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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 68

def can_attack!
  @attack_mode = true
end

#can_attack?(attacks) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 72

def can_attack?(attacks)
  @attack_mode && attacks.remain_attack? && (Time.now - @last_attack_time >= ATTACK_COOLDOWN_SECOND)
end

#crouch ⇒ Object 



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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 58

def crouch
  unless jumping? || crouching?
    @crouching_until = Time.now + CROUCH_SECOND
  end
end

#crouching? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 64

def crouching?
  @crouching_until && Time.now < @crouching_until
end

#current_direction ⇒ Object 



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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 194

def current_direction
  (@vx >= 0) ? RIGHT : LEFT
end

#enforce_boundary(map, offset_x:) ⇒ Object 



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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 174

def enforce_boundary(map, offset_x:)
  @x, @y = map.clamp_position(
    dx: @vx.round.clamp(-1, 1) * -1,
    dy: @vy.round.clamp(-1, 1) * -1,
    **bounding_box
  )
end

#fall_if_ground_is_passable(map) ⇒ Object 



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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 118

def fall_if_ground_is_passable(map)
  foot_y = @y + BASE_HEIGHT
  center_x = @x + width / 2.0
  if map.passable_at?(center_x, foot_y + 1)
    fall
  end
end

#height ⇒ Object 



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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 190

def height
  @height[crouching?] ||= current_character.first.size
end

#jump ⇒ Object 



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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 50

def jump
  unless jumping? || crouching?
    @jumping = true
    @vy = JUMP_INITIAL_VELOCITY
    Manager::AudioManager.instance.jump
  end
end

#land_unless_ground_is_passable(map) ⇒ Object 



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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 126

def land_unless_ground_is_passable(map)
  foot_y = @y + BASE_HEIGHT
  (x...(x + width)).each do |col|
    unless map.passable_at?(col, foot_y)
      break land(foot_y)
    end
  end
end

#left(speed_ratio = 1.0) ⇒ Object 



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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 35

def left(speed_ratio = 1.0)
  move(in_warmup? ? RIGHT : LEFT, speed_ratio)
end

#right(speed_ratio = 1.0) ⇒ Object 



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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 31

def right(speed_ratio = 1.0)
  move(RIGHT, speed_ratio)
end

#simulate_physics ⇒ Object 



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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 135

def simulate_physics
  return @coordinate_updated_time = Time.now if stunned?

  now = Time.now
  elapsed_time = now - @coordinate_updated_time
  @coordinate_updated_time = now
  if jumping?
    @vy += JUMP_GRAVITY * elapsed_time
    @y += @vy * elapsed_time
    if @y >= BASE_Y
      @y = BASE_Y
      @vy = 0
    end
  else
    if current_direction == RIGHT
      @vx -= friction * elapsed_time
      @vx = [@vx, 0].max # vx must be positive
    else
      @vx += friction * elapsed_time
      @vx = [@vx, 0].min # vx must be negative
    end
  end
  @x += @vx * elapsed_time
  @x = @x.round.to_i
  @y = @y.round.to_i
end

#stompable? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 95

def stompable?
  @stompable
end

#stop ⇒ Object 



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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 44

def stop
  @vx = 0
  @last_speed_ratio = 1.0
  @fast_speed_since = nil
end

#stun ⇒ Object 



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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 87

def stun
  @stunned_until = Time.now + STUN_SECOND
end

#stunned? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 91

def stunned?
  Time.now < @stunned_until
end

#update ⇒ Object 



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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 99

def update
  return if stunned?

  now = Time.now
  standup
  if (now - @animetion_updated_time) >= ANIMETION_FRAME_SECOND
    @walking_frame = (@walking_frame + 1) % current_character.size
    @animetion_updated_time = now
  end
  if jumping?
    @stompable = @vy.positive? || (@y == BASE_Y && @vy.zero?) # stompable also when the moment just land
    if @vy.zero?
      @jumping = false
    end
  else
    @stompable = false
  end
end

#walk(action) ⇒ Object

Parameters:



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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 40

def walk(action)
  action.right? ? right(action.speed_ratio) : left(action.speed_ratio)
end

#width ⇒ Object 



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# File 'lib/road_to_rubykaigi/sprite/player.rb', line 186

def width
  @width[@attack_mode] ||= current_character.first.map(&:size).max
end