Class: Fox::FXGLCube

Inherits:
FXGLShape show all
Defined in:
lib/fox16/glshapes.rb

Overview

OpenGL cube object

Instance Attribute Summary collapse

Attributes inherited from FXGLShape

#position, #tipText

Instance Method Summary collapse

Methods inherited from FXGLShape

#getMaterial, #setMaterial, #setRange

Methods inherited from FXGLObject

#bounds, #canDelete, #canDrag, #copy, #drag, #draw, #hit, #identify

Methods inherited from FXObject

#bind, #handle, #load, #save, subclasses

Constructor Details

#initialize(*args) ⇒ FXGLCube

Return an initialized FXGLCube instance.

One option is to initialize the cube with a specified origin, width, height and depth:

aCube = FXGLCube.new(x, y, z, w, h, d)

If left unspecified, the width (w), height (h) and depth (d) default to 1.0.

Another option is to initialize the cube with a specified origin, width, height, depth and material:

aCube = FXGLCube.new(x, y, z, w, h, d, material)

where the material is an FXMaterial instance.



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# File 'lib/fox16/glshapes.rb', line 171

def initialize(*args)
  if args.length == 7
    super(args[0], args[1], args[2], SHADING_SMOOTH|STYLE_SURFACE,
          args[6], args[6])
  else
    super(args[0], args[1], args[2], SHADING_SMOOTH|STYLE_SURFACE)
  end
  @width = args[3] ? args[3] : 1.0
  @height = args[4] ? args[4] : 1.0
  @depth = args[5] ? args[5] : 1.0
  setRange(FXRangef.new(-0.5*@width, 0.5*@width,
                      -0.5*@height, 0.5*@height,
                      -0.5*@depth, 0.5*@depth))
end

Instance Attribute Details

#depth ⇒ Object

Cube depth [Float]



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# File 'lib/fox16/glshapes.rb', line 151

def depth
  @depth
end

#height ⇒ Object

Cube height [Float]



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# File 'lib/fox16/glshapes.rb', line 148

def height
  @height
end

#width ⇒ Object

Cube width [Float]



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# File 'lib/fox16/glshapes.rb', line 145

def width
  @width
end

Instance Method Details

#drawshape(viewer) ⇒ Object

Draws this cube into viewer (an FXGLViewer instance).



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# File 'lib/fox16/glshapes.rb', line 189

def drawshape(viewer)
  xmin, xmax = -0.5*@width, 0.5*@width
  ymin, ymax = -0.5*@height, 0.5*@height
  zmin, zmax = -0.5*@depth, 0.5*@depth

  # Draw low face
  GL.Begin(GL::TRIANGLE_STRIP)
    GL.Normal3d(0.0, 0.0, -1.0)
    GL.Vertex3d(xmin, ymin, zmin)
    GL.Vertex3d(xmin, ymax, zmin)
    GL.Vertex3d(xmax, ymin, zmin)
    GL.Vertex3d(xmax, ymax, zmin)
  GL.End()

  # Draw east face
  GL.Begin(GL::TRIANGLE_STRIP)
    GL.Normal3d(1.0, 0.0, 0.0)
    GL.Vertex3d(xmax, ymin, zmin)
    GL.Vertex3d(xmax, ymax, zmin)
    GL.Vertex3d(xmax, ymin, zmax)
    GL.Vertex3d(xmax, ymax, zmax)
  GL.End()

  # Draw high face
  GL.Begin(GL::TRIANGLE_STRIP)
    GL.Normal3d(0.0, 0.0, 1.0)
    GL.Vertex3d(xmax, ymin, zmax)
    GL.Vertex3d(xmax, ymax, zmax)
    GL.Vertex3d(xmin, ymin, zmax)
    GL.Vertex3d(xmin, ymax, zmax)
  GL.End()

  # Draw west face
  GL.Begin(GL::TRIANGLE_STRIP)
    GL.Normal3d(-1.0, 0.0, 0.0)
    GL.Vertex3d(xmin, ymin, zmax)
    GL.Vertex3d(xmin, ymax, zmax)
    GL.Vertex3d(xmin, ymin, zmin)
    GL.Vertex3d(xmin, ymax, zmin)
  GL.End()

  # Draw north face
  GL.Begin(GL::TRIANGLE_STRIP)
    GL.Normal3d(0.0, 1.0, 0.0)
    GL.Vertex3d(xmin, ymax, zmin)
    GL.Vertex3d(xmin, ymax, zmax)
    GL.Vertex3d(xmax, ymax, zmin)
    GL.Vertex3d(xmax, ymax, zmax)
  GL.End()

  # Draw south face
  GL.Begin(GL::TRIANGLE_STRIP)
    GL.Normal3d(0.0, -1.0, 0.0)
    GL.Vertex3d(xmin, ymin, zmax)
    GL.Vertex3d(xmin, ymin, zmin)
    GL.Vertex3d(xmax, ymin, zmax)
    GL.Vertex3d(xmax, ymin, zmin)
  GL.End()
end