Class: Disp3D::GLView

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

Overview

GLView class hold primary object for 3D displaying like camera, scene_graph. User never use this class Use QtWidgetGL class (in Qt Application) Use GLUTWindow class (in GLUT Window)

Direct Known Subclasses

GLUTWindow

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(width, height) ⇒ GLView

Returns a new instance of GLView.



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# File 'lib/gl_view.rb', line 19

def initialize(width, height)
  GL.FrontFace(GL::GL_CW)

  GL.Enable(GL::GL_AUTO_NORMAL)
  GL.Enable(GL::GL_NORMALIZE)

  GL.Enable(GL::GL_DEPTH_TEST)
  GL.DepthFunc(GL::GL_LESS)

  GL.Enable(GL::BLEND)
  GL.BlendFunc(GL::GL_SRC_ALPHA, GL::GL_ONE_MINUS_SRC_ALPHA)

  @light = Light.new()
  @camera = Camera.new()

  @world_scene_graph = SceneGraph.new()
  @camera_scene_graph = SceneGraph.new()

  @picker = Picker.new(self)
  @bk_color = [0.28,0.23,0.55,1]

  @manipulator = Manipulator.new(@camera, @picker)
  @compass = Compass.new(@camera)

  @mouse_move_proc = nil
  @mouse_press_proc = nil
  @mouse_release_proc = nil
end

Instance Attribute Details

#bk_color ⇒ Object

Returns the value of attribute bk_color.



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# File 'lib/gl_view.rb', line 17

def bk_color
  @bk_color
end

#camera ⇒ Object (readonly)

Returns the value of attribute camera.



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# File 'lib/gl_view.rb', line 12

def camera
  @camera
end

#camera_scene_graph ⇒ Object (readonly)

Returns the value of attribute camera_scene_graph.



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# File 'lib/gl_view.rb', line 11

def camera_scene_graph
  @camera_scene_graph
end

#light ⇒ Object (readonly)

Returns the value of attribute light.



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# File 'lib/gl_view.rb', line 14

def light
  @light
end

#manipulator ⇒ Object (readonly)

Returns the value of attribute manipulator.



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# File 'lib/gl_view.rb', line 13

def manipulator
  @manipulator
end

#picker ⇒ Object (readonly)

Returns the value of attribute picker.



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# File 'lib/gl_view.rb', line 15

def picker
  @picker
end

#world_scene_graph ⇒ Object (readonly)

Returns the value of attribute world_scene_graph.



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# File 'lib/gl_view.rb', line 10

def world_scene_graph
  @world_scene_graph
end

Instance Method Details

#capture ⇒ Object 



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# File 'lib/gl_view.rb', line 52

def capture
  dmy,dmy, w, h = @camera.viewport
  gl_display
  GL.ReadBuffer(GL::FRONT)
  GL.PixelStorei(GL::UNPACK_ALIGNMENT,1)
  data = GL.ReadPixels(0,0,w,h,GL::RGB, GL::UNSIGNED_BYTE)
  data_ary = data.unpack("C*")
  data_index = -1
  max_color_intensity =  Magick::QuantumRange.to_f
  pixels = Array.new(w*h).collect do | elem |
      r = data_ary[data_index+=1]
      g = data_ary[data_index+=1]
      b = data_ary[data_index+=1]
      elem = Magick::Pixel.new(
                               r/255.0*max_color_intensity,
                               g/255.0*max_color_intensity,
                               b/255.0*max_color_intensity)
  end
  image = Magick::Image.new(w, h).store_pixels(0,0,w,h,pixels)
  return image.flip
end

#centering ⇒ Object 



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# File 'lib/gl_view.rb', line 78

def centering
  @manipulator.centering(@world_scene_graph)
end

#fit ⇒ Object 



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# File 'lib/gl_view.rb', line 74

def fit
  @manipulator.fit(@world_scene_graph)
end

#gl_display ⇒ Object 



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

def gl_display()
  GL.DrawBuffer( GL::BACK )
  GL.ClearColor(@bk_color[0],@bk_color[1],@bk_color[2],@bk_color[3])
  GL.Clear(GL::GL_COLOR_BUFFER_BIT | GL::GL_DEPTH_BUFFER_BIT)

  return if(@camera.nil? or @light.nil?)

  GL.Enable(GL::GL_DEPTH_TEST)
  @camera.set_projection_for_world_scene
  gl_display_world_scene_graph()
  GL.Disable(GL::GL_DEPTH_TEST)
  @camera.set_projection_for_camera_scene
  gl_display_camera_scene_graph()
  @compass.gl_display(self)
end

#gl_display_camera_scene_graph ⇒ Object 



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# File 'lib/gl_view.rb', line 124

def gl_display_camera_scene_graph()
  return if(@camera_scene_graph.nil?)
  GL.MatrixMode(GL::GL_MODELVIEW)
  GL.PushMatrix()
  GL.LoadIdentity()
  GLU.LookAt(0, 0, 1, 0, 0, 0, 0, 1, 0)
  @camera_scene_graph.gl_display(self)
  GL.PopMatrix()
end

#gl_display_world_scene_graph ⇒ Object

users do not need to user them



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# File 'lib/gl_view.rb', line 112

def gl_display_world_scene_graph()
  return if(@world_scene_graph.nil?)
  GL.MatrixMode(GL::GL_MODELVIEW)
  GL.PushMatrix()
  GL.LoadIdentity()
  @camera.apply_position()
  @camera.apply_attitude()
  @light.gl_display()
  @world_scene_graph.gl_display(self)
  GL.PopMatrix()
end

#mouse_move(&block) ⇒ Object 



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

def mouse_move(&block)
  @mouse_move_proc = block
end

#mouse_move_process(x, y) ⇒ Object 



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# File 'lib/gl_view.rb', line 151

def mouse_move_process(x,y)
  @mouse_move_proc.call(self, x,y) if( @mouse_move_proc != nil)
  picking_in_progress = @picker.motion(x, y)
  if(picking_in_progress)
    return false
  end
  return @manipulator.motion(x, y)
end

#mouse_press(&block) ⇒ Object 



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# File 'lib/gl_view.rb', line 86

def mouse_press(&block)
  @mouse_press_proc = block
end

#mouse_press_process(button, x, y) ⇒ Object 



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# File 'lib/gl_view.rb', line 139

def mouse_press_process(button, x, y)
  @mouse_press_proc.call(self, button, x, y) if( @mouse_press_proc != nil)
  @manipulator.mouse(button, GLUT::GLUT_DOWN, x, y)
  @picker.mouse(button, GLUT::GLUT_DOWN, x, y)
end

#mouse_release(&block) ⇒ Object 



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# File 'lib/gl_view.rb', line 90

def mouse_release(&block)
  @mouse_release_proc = block
end

#mouse_release_process(button, x, y) ⇒ Object 



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# File 'lib/gl_view.rb', line 145

def mouse_release_process(button, x, y)
  @mouse_release_proc.call(self, button, x, y) if( @mouse_release_proc != nil)
  @manipulator.mouse(button, GLUT::GLUT_UP, x, y)
  @picker.mouse(button, GLUT::GLUT_UP, x, y)
end

#reshape(w, h) ⇒ Object 



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# File 'lib/gl_view.rb', line 134

def reshape(w,h)
  @camera.reshape(w,h)
  @compass.update
end

#sync_to(target_view) ⇒ Object 



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# File 'lib/gl_view.rb', line 48

def sync_to target_view
  @world_scene_graph = target_view.world_scene_graph
end