Module: GLApp

Defined in:
lib/glapp.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#height ⇒ Object (readonly)

Returns the value of attribute height.



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# File 'lib/glapp.rb', line 5

def height
  @height
end

#title ⇒ Object (readonly)

Returns the value of attribute title.



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# File 'lib/glapp.rb', line 5

def title
  @title
end

#width ⇒ Object (readonly)

Returns the value of attribute width.



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# File 'lib/glapp.rb', line 5

def width
  @width
end

Instance Method Details

#draw ⇒ Object 



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# File 'lib/glapp.rb', line 69

def draw
end

#go_fullscreen ⇒ Object 



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# File 'lib/glapp.rb', line 34

def go_fullscreen
  glutGameModeString([width, height].join("x"))

  if glutGameModeGet(GLUT_GAME_MODE_POSSIBLE)
    glutEnterGameMode
    if glutGameModeGet(GLUT_GAME_MODE_ACTIVE) == 0
      go_windowed
    end
  else
    go_windowed
  end
end

#go_windowed ⇒ Object 



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# File 'lib/glapp.rb', line 23

def go_windowed
  if glutGameModeGet(GLUT_GAME_MODE_ACTIVE) != 0
    glutLeaveGameMode
  end

  unless @window
    glutInitWindowSize(width, height)
    @window = glutCreateWindow(title)
  end
end

#keyboard_down(key, modifiers) ⇒ Object 



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# File 'lib/glapp.rb', line 79

def keyboard_down(key, modifiers)
end

#keyboard_up(key, modifiers) ⇒ Object 



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# File 'lib/glapp.rb', line 82

def keyboard_up(key, modifiers)
end

#mouse_click(button, state, x, y) ⇒ Object 



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# File 'lib/glapp.rb', line 91

def mouse_click(button, state, x, y)
end

#mouse_dragging_motion(x, y) ⇒ Object 



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# File 'lib/glapp.rb', line 94

def mouse_dragging_motion(x, y)
end

#mouse_motion(x, y) ⇒ Object 



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# File 'lib/glapp.rb', line 100

def mouse_motion(x, y)
end

#mouse_passive_motion(x, y) ⇒ Object 



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# File 'lib/glapp.rb', line 97

def mouse_passive_motion(x, y)
end

#post_draw ⇒ Object 



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# File 'lib/glapp.rb', line 72

def post_draw
  glutSwapBuffers
end

#pre_draw ⇒ Object 



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# File 'lib/glapp.rb', line 59

def pre_draw
  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
  glMatrixMode(GL_PROJECTION)
  glLoadIdentity
  gluPerspective(30.0, width / height, 0.1, 1000.0)

  glMatrixMode(GL_MODELVIEW)
  glLoadIdentity
end

#resize ⇒ Object 



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# File 'lib/glapp.rb', line 103

def resize
  # Reset the coordinate system
  glMatrixMode(GL_PROJECTION)
  glLoadIdentity

  # Set the viewport to be the entire window
  glViewport(0, 0, width, height)

  # Set the correct perspective
  gluPerspective(45, width.to_f / height.to_f, 1, 1000)
  glMatrixMode(GL_MODELVIEW)
  glLoadIdentity
  gluLookAt(0, 0, 5,
            0, 0, -1,
            0, 1, 0)
end

#setup ⇒ Object 



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# File 'lib/glapp.rb', line 56

def setup
end

#setup_context ⇒ Object

begin hooks



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# File 'lib/glapp.rb', line 49

def setup_context
  glEnable(GL_DEPTH_TEST)
  glEnable(GL_BLEND)
  glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
  glutIgnoreKeyRepeat(1)
end

#show(width, height, title = "glapp", fullscreen = false) ⇒ Object 



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# File 'lib/glapp.rb', line 7

def show(width, height, title = "glapp", fullscreen = false)
  glutInit
  glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH)
  
  @width = width
  @height = height
  @title = title
  
  fullscreen ? go_fullscreen : go_windowed
  setup
  
  setup_context
  wire
  glutMainLoop
end

#special_keyboard_down(key, modifiers) ⇒ Object 



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# File 'lib/glapp.rb', line 85

def special_keyboard_down(key, modifiers)
end

#special_keyboard_up(key, modifiers) ⇒ Object 



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# File 'lib/glapp.rb', line 88

def special_keyboard_up(key, modifiers)
end

#update(seconds) ⇒ Object 



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# File 'lib/glapp.rb', line 76

def update(seconds)
end

#wire ⇒ Object

end hooks



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# File 'lib/glapp.rb', line 122

def wire
  glutDisplayFunc(lambda do
    pre_draw
    draw
    post_draw
  end)

  glutIdleFunc(lambda do
    time = Time.now
    @last_time ||= time
    delta = time - @last_time
    update(delta)
    @last_time = time
    glutPostRedisplay
  end)

  glutKeyboardFunc(lambda do |key, x, y|
    keyboard_down(key, glutGetModifiers)
  end)

  glutKeyboardUpFunc(lambda do |key, x, y|
    keyboard_up(key, glutGetModifiers)
  end)

  glutSpecialFunc(lambda do |key, x, y|
    special_keyboard_down(key, glutGetModifiers)
  end)

  glutSpecialUpFunc(lambda do |key, x, y|
    special_keyboard_up(key, glutGetModifiers)
  end)

  glutMouseFunc(lambda do |button, state, x, y|
    mouse_click(button, state, x, y)
  end)

  glutMotionFunc(lambda do |x, y|
    mouse_dragging_motion(x, y)
    mouse_motion(x, y)
  end)

  glutPassiveMotionFunc(lambda do |x, y|
    mouse_passive_motion(x, y)
    mouse_motion(x, y)
  end)

  glutReshapeFunc(lambda do |width, height|
    @width = width
    @height = height
    resize
  end)
end