Class: CyberarmEngine::Engine

Inherits:
Gosu::Window
  • Object
show all
Defined in:
lib/cyberarm_engine/engine.rb

Constant Summary collapse

IMAGES = 
{}
SAMPLES = 
{}
SONGS = 
{}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(width: 800, height: 600, fullscreen: false, update_interval: 1000.0/60, resizable: false) ⇒ Engine

Returns a new instance of Engine.



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# File 'lib/cyberarm_engine/engine.rb', line 18

def initialize(width: 800, height: 600, fullscreen: false, update_interval: 1000.0/60, resizable: false)
  @show_cursor = false

  super(width, height, fullscreen: fullscreen, update_interval: update_interval, resizable: resizable)
  $window = self
  @last_frame_time = Gosu.milliseconds-1
  @current_frame_time = Gosu.milliseconds
  self.caption = "CyberarmEngine #{CyberarmEngine::VERSION} #{Gosu.language}"

  @states = []

  setup if defined?(setup)
end

Instance Attribute Details

#last_frame_time ⇒ Object (readonly)

Returns the value of attribute last_frame_time.



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# File 'lib/cyberarm_engine/engine.rb', line 8

def last_frame_time
  @last_frame_time
end

#show_cursor ⇒ Object

Returns the value of attribute show_cursor.



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# File 'lib/cyberarm_engine/engine.rb', line 7

def show_cursor
  @show_cursor
end

Class Method Details

.dt ⇒ Object 



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# File 'lib/cyberarm_engine/engine.rb', line 14

def self.dt
  $window.last_frame_time/1000.0
end

.now ⇒ Object 



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# File 'lib/cyberarm_engine/engine.rb', line 10

def self.now
  Gosu.milliseconds
end

Instance Method Details

#button_down(id) ⇒ Object 



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# File 'lib/cyberarm_engine/engine.rb', line 50

def button_down(id)
  super
  current_state.button_down(id) if current_state
end

#button_up(id) ⇒ Object 



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# File 'lib/cyberarm_engine/engine.rb', line 55

def button_up(id)
  super
  current_state.button_up(id) if current_state
end

#current_state ⇒ Object 



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# File 'lib/cyberarm_engine/engine.rb', line 77

def current_state
  @states.last
end

#draw ⇒ Object 



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# File 'lib/cyberarm_engine/engine.rb', line 32

def draw
  current_state.draw if current_state
end

#draw_circle(cx, cy, r, z = 9999, color = Gosu::Color::GREEN, step = 10) ⇒ Object

Sourced from gist.github.com/ippa/662583



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# File 'lib/cyberarm_engine/engine.rb', line 94

def draw_circle(cx,cy,r, z = 9999,color = Gosu::Color::GREEN, step = 10)
  0.step(360, step) do |a1|
    a2 = a1 + step
    draw_line(cx + Gosu.offset_x(a1, r), cy + Gosu.offset_y(a1, r), color, cx + Gosu.offset_x(a2, r), cy + Gosu.offset_y(a2, r), color, z)
  end
end

#dt ⇒ Object 



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# File 'lib/cyberarm_engine/engine.rb', line 46

def dt
  @last_frame_time/1000.0
end

#needs_cursor? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cyberarm_engine/engine.rb', line 42

def needs_cursor?
  @show_cursor
end

#pop_state ⇒ Object 



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# File 'lib/cyberarm_engine/engine.rb', line 89

def pop_state
  @states.pop
end

#previous_state ⇒ Object 



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# File 'lib/cyberarm_engine/engine.rb', line 81

def previous_state
  if @states.size > 1 && state = @states[@states.size-2]
    return state
  else
    return nil
  end
end

#push_state(klass, options = {}) ⇒ Object 



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# File 'lib/cyberarm_engine/engine.rb', line 60

def push_state(klass, options={})
  options = {setup: true}.merge(options)

  if klass.instance_of?(klass.class) && defined?(klass.options)
    @states << klass
    klass.setup if options[:setup]
  else
    @states << klass.new(options) if child_of?(klass, GameState)
    @states << klass.new if child_of?(klass, Element::Container)
    current_state.setup if current_state.class == klass && options[:setup]
  end
end

#update ⇒ Object 



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# File 'lib/cyberarm_engine/engine.rb', line 36

def update
  current_state.update if current_state
  @last_frame_time = Gosu.milliseconds-@current_frame_time
  @current_frame_time = Gosu.milliseconds
end