Class: Geom::TriangleMesh

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(vertices = nil, faces = nil, user_data = nil) ⇒ TriangleMesh

Returns a new instance of TriangleMesh.



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# File 'lib/geom/triangle_mesh.rb', line 6

def initialize( vertices=nil, faces=nil, user_data=nil )
  @data     = user_data || Hash.new
  @faces    = faces     || Array.new
  @vertices = vertices  || Array.new
  @meshes   = Array.new

  @tess     = EarTrim
end

Instance Attribute Details

#data ⇒ Object

Returns the value of attribute data.



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# File 'lib/geom/triangle_mesh.rb', line 4

def data
  @data
end

#faces ⇒ Object

Returns the value of attribute faces.



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# File 'lib/geom/triangle_mesh.rb', line 4

def faces
  @faces
end

#meshes ⇒ Object

Returns the value of attribute meshes.



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# File 'lib/geom/triangle_mesh.rb', line 4

def meshes
  @meshes
end

#tess ⇒ Object

Returns the value of attribute tess.



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# File 'lib/geom/triangle_mesh.rb', line 4

def tess
  @tess
end

#texcoord ⇒ Object

Returns the value of attribute texcoord.



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# File 'lib/geom/triangle_mesh.rb', line 4

def texcoord
  @texcoord
end

#vertices ⇒ Object

Returns the value of attribute vertices.



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# File 'lib/geom/triangle_mesh.rb', line 4

def vertices
  @vertices
end

Instance Method Details

#<<(mesh) ⇒ Object 



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# File 'lib/geom/triangle_mesh.rb', line 15

def << (mesh)
  @meshes << mesh
end

#bounding_box ⇒ Object 



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# File 'lib/geom/triangle_mesh.rb', line 73

def bounding_box
  min = Geom::Number3D.new( 1000, 1000, 1000)
  max = Geom::Number3D.new(-1000,-1000,-1000)

  vertices.each do |v|
    min.x = v.x if v.x < min.x
    min.y = v.y if v.y < min.y
    min.z = v.z if v.z < min.z

    max.x = v.x if v.x > max.x
    max.y = v.y if v.y > max.y
    max.z = v.z if v.z > max.z
  end

  { :max => max , :min => min }
end

#merge(other) ⇒ Object 



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# File 'lib/geom/triangle_mesh.rb', line 90

def merge(other)
  @vertices.concat other.vertices
end

#reverse ⇒ Object 



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# File 'lib/geom/triangle_mesh.rb', line 38

def reverse
  faces.each {|f| f.vertices.reverse! }
end

#transform_vertices(transformation) ⇒ Object 



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# File 'lib/geom/triangle_mesh.rb', line 42

def transform_vertices(transformation)
  ta = transformation.to_a
  m11 = ta[0][0]
  m12 = ta[0][1]
  m13 = ta[0][2]
  m21 = ta[1][0]
  m22 = ta[1][1]
  m23 = ta[1][2]
  m31 = ta[2][0]
  m32 = ta[2][1]
  m33 = ta[2][2]

  m14 = ta[0][3]
  m24 = ta[1][3]
  m34 = ta[2][3]

  @vertices.each do |v|
    vx = v.x
    vy = v.y
    vz = v.z

    tx = vx * m11 + vy * m12 + vz * m13 + m14
    ty = vx * m21 + vy * m22 + vz * m23 + m24
    tz = vx * m31 + vy * m32 + vz * m33 + m34

    v.x = tx
    v.y = ty
    v.z = tz
  end
end

#update ⇒ Object 



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# File 'lib/geom/triangle_mesh.rb', line 34

def update
  @meshes.each {|m| m.update}
end