Class: RAGE::Mesh

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

Overview

3D mesh to be displayed on the screen. Contains geometry and visual properties. Currently implements certain parts of the X3D graphics schema. en.wikipedia.org/wiki/X3D

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(data) ⇒ Mesh

Create new mesh from raw X3D mesh



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# File 'lib/rage/mesh.rb', line 30

def initialize(data)
   # set default attributes
   @op_translation =  [0,0,0]
   @op_scale       =  [1,1,1]

   # load the x3d xsd schema and classes if not already done so
   unless defined? @@x3d_schema
     @@x3d_schema = RXSD::Parser.parse_xsd :uri => 'http://www.web3d.org/specifications/x3d-3.0.xsd' # TODO allow location which this is pulled from to be configured
     @@x3d_schema_classes = @@x3d_schema.to :ruby_classes
   end

   # load the scene from the x3d schema instance
   objs = RXSD::Parser.parse_xml(:raw => data).to(:ruby_objects, :schema => @@x3d_schema)
   @scene = objs[0].scene

   # FIXME get all transformations (and groups of) under scene
   @tf = @scene.collision.transform
   @translation = @tf.translation.to_xa :type => XSDFloat
   @scale       = @tf.scale.to_xa :type => XSDFloat
   #diffuse     = tf.shape.appearance.material.diffuse_color.split.collect { |c| c.to_f }
   #specular    = tf.shape.appearance.material.specular_color.split.collect { |c| c.to_f }
   #emissive    = tf.shape.appearance.material.emissive_color.split.collect { |c| c.to_f }
   @coord_index  = @tf.shape.indexed_face_set.coord_index.
                                   to_xa(:type => String, :delim => ",").
                                   collect { |coords| a = coords.to_xa(:type => XSDInteger); a[0...a.size-1]}.flatten # cut off the last -1
   @coord_point  = @tf.shape.indexed_face_set.coordinate.point.
                                   to_xa(:type => String, :delim => ",").
                                   collect { |coords| coords.to_xa :type => XSDFloat }.flatten
end

Instance Attribute Details

#op_rotation ⇒ Object

Optional transformation params, set these to transformations to be factored in if needed



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# File 'lib/rage/mesh.rb', line 20

def op_rotation
  @op_rotation
end

#op_scale ⇒ Object

Optional transformation params, set these to transformations to be factored in if needed



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# File 'lib/rage/mesh.rb', line 20

def op_scale
  @op_scale
end

#op_translation ⇒ Object

Optional transformation params, set these to transformations to be factored in if needed



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# File 'lib/rage/mesh.rb', line 20

def op_translation
  @op_translation
end

Instance Method Details

#boundaries ⇒ Object

Return mesh boundaries. This is generated by determining the maxima/minima coordinate points. Return value is an array of six values as follows

max_x, max_y, max_z, min_x, min_y, min_z



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# File 'lib/rage/mesh.rb', line 98

def boundaries
   centerx, centery, centerz = *center
   max_x = max_y = max_z = min_x = min_y = min_z = 0
   @coord_point.each_index {  |cpi|
      if cpi % 3 == 0
        adjx = centerx + @coord_point[cpi]
        if  adjx > max_x
           max_x = adjx
        elsif adjx < min_x
           min_x = adjx
        end
      elsif cpi % 3 == 1 
        adjy = centery + @coord_point[cpi]
        if adjy > max_y
           max_y = adjy
        elsif adjy < min_y
           min_y = adjy
        end
      else
        adjz = centerz + @coord_point[cpi]
        if adjz > max_z
           max_z = adjz
        elsif adjz < min_z
           min_z = adjz
        end
      end
   }
   return max_x, max_y, max_z, min_x, min_y, min_z
end

#center ⇒ Object

Return center point of mesh from mesh translation provided in mesh and op_translation



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# File 'lib/rage/mesh.rb', line 82

def center
   return @op_translation[0] + @translation[0],
          @op_translation[1] + @translation[1],
          @op_translation[2] + @translation[2]
end

#coordinates ⇒ Object

Return current location coordinates associated w/ the mesh



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# File 'lib/rage/mesh.rb', line 75

def coordinates
  [@location.x, @location.y, @location.z]
end

#draw ⇒ Object

Invoked during draw cycle to draw mesh



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# File 'lib/rage/mesh.rb', line 130

def draw
   # FIXME mesh material
   #Gl.glMaterial(Gl::GL_FRONT, Gl::GL_DIFFUSE,  diffuse)
   #Gl.glMaterial(Gl::GL_FRONT, Gl::GL_SPECULAR, specular)
   #Gl.glMaterial(Gl::GL_FRONT, Gl::GL_EMISSIVE, emissive)

   # translate coordinate system to center position of mesh
   Gl.glTranslatef(*center)

   # scale as specified 
   Gl.glScalef(*scale)

   # FIXME rotate according to mesh and optional params

   # draw mesh
   Gl.glEnableClientState(Gl::GL_VERTEX_ARRAY);
   Gl.glVertexPointer(3, Gl::GL_FLOAT, 0, @coord_point);
   Gl.glDrawElements(Gl::GL_QUADS, @coord_index.size, Gl::GL_UNSIGNED_INT, @coord_index);
   Gl.glDisableClientState(Gl::GL_VERTEX_ARRAY);
end

#scale ⇒ Object

Return factor which mesh should scale to



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# File 'lib/rage/mesh.rb', line 89

def scale
   return @scale[0] * @op_scale[0],
          @scale[1] * @op_scale[1],
          @scale[2] * @op_scale[2]
end

#show_at(args = {}) ⇒ Object

Create location w/ specified args, associated mesh w/ it and add it to the LocationsManager



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# File 'lib/rage/mesh.rb', line 61

def show_at(args = {})
  # XXX not a huge fan of storing location interally,
  # but this is best way to do this for now
  if ! defined? @location
    args[:mesh] = self
    @location = Location.new(args)
    LocationsManager.instance.add @location
  else
    @location.update args
  end
  return @location
end