Class: Quake::Window

Inherits:
Object
  • Object
show all
Defined in:
lib/quake/window.rb

Constant Summary collapse

DEFAULT_WIDTH = 
1280
DEFAULT_HEIGHT = 
720
TITLE = 
"RubyQuake"

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(width: DEFAULT_WIDTH, height: DEFAULT_HEIGHT, visible: true) ⇒ Window

Returns a new instance of Window.



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# File 'lib/quake/window.rb', line 15

def initialize(width: DEFAULT_WIDTH, height: DEFAULT_HEIGHT, visible: true)
  @width = width
  @height = height
  @visible = visible

  SDL.load_lib("/opt/homebrew/lib/libSDL2.dylib")
  SDL.Init(SDL::INIT_VIDEO)

  SDL.GL_SetAttribute(SDL::GL_CONTEXT_MAJOR_VERSION, 2)
  SDL.GL_SetAttribute(SDL::GL_CONTEXT_MINOR_VERSION, 1)
  SDL.GL_SetAttribute(SDL::GL_DOUBLEBUFFER, 1)
  SDL.GL_SetAttribute(SDL::GL_DEPTH_SIZE, 24)

  window_flags = SDL::WINDOW_OPENGL
  window_flags |= visible ? SDL::WINDOW_SHOWN : SDL::WINDOW_HIDDEN

  @window = SDL.CreateWindow(
    TITLE,
    SDL::WINDOWPOS_CENTERED_MASK,
    SDL::WINDOWPOS_CENTERED_MASK,
    width, height,
    window_flags
  )

  @context = SDL.GL_CreateContext(@window)
  SDL.GL_MakeCurrent(@window, @context)
  SDL.GL_SetSwapInterval(visible ? 1 : 0) # vsync only for visible

  GL.load_lib
  GLU.load_lib

  GL.Viewport(0, 0, width, height)
  GL.Enable(GL::DEPTH_TEST)
  GL.DepthFunc(GL::LEQUAL) # R_Clear
  # Quake's axis flip reverses winding, so front faces are culled (R_SetupGL)
  GL.CullFace(GL::FRONT)
  GL.ClearColor(0.0, 0.0, 0.0, 1.0)

  SDL.SetRelativeMouseMode(SDL::TRUE) if visible
end

Instance Attribute Details

#height ⇒ Object (readonly)

Returns the value of attribute height.



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# File 'lib/quake/window.rb', line 13

def height
  @height
end

#width ⇒ Object (readonly)

Returns the value of attribute width.



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# File 'lib/quake/window.rb', line 13

def width
  @width
end

Instance Method Details

#aspect_ratio ⇒ Object 



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# File 'lib/quake/window.rb', line 67

def aspect_ratio
  @width.to_f / @height
end

#close ⇒ Object 



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# File 'lib/quake/window.rb', line 71

def close
  SDL.GL_DeleteContext(@context)
  SDL.DestroyWindow(@window)
  SDL.Quit
end

#poll_events ⇒ Object 



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# File 'lib/quake/window.rb', line 60

def poll_events
  @event ||= SDL::Event.new
  while SDL.PollEvent(@event.to_ptr) != 0
    yield @event
  end
end

#swap ⇒ Object 



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# File 'lib/quake/window.rb', line 56

def swap
  SDL.GL_SwapWindow(@window)
end