140 lines
4.8 KiB
C++
140 lines
4.8 KiB
C++
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//=============================================================================
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//
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// OpenMesh
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// Copyright (C) 2003 by Computer Graphics Group, RWTH Aachen
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// www.openmesh.org
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//
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//-----------------------------------------------------------------------------
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//
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// License
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//
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// This library is free software; you can redistribute it and/or modify it
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// under the terms of the GNU Lesser General Public License as published
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// by the Free Software Foundation, version 2.1.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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//-----------------------------------------------------------------------------
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//
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// $Revision: 1802 $
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// $Date: 2008-05-19 11:55:07 +0200 (Mo, 19. Mai 2008) $
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//
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//=============================================================================
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/** \file CompositeLoopT.hh
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*/
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//=============================================================================
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//
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// CLASS LoopT
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//
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//=============================================================================
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#ifndef OPENMESH_SUBDIVIDER_UNIFORM_COMPOSITELOOPT_HH
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#define OPENMESH_SUBDIVIDER_UNIFORM_COMPOSITELOOPT_HH
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//== INCLUDES =================================================================
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#include "Composite/CompositeT.hh"
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#include "Composite/CompositeTraits.hh"
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//== NAMESPACE ================================================================
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namespace OpenMesh { // BEGIN_NS_OPENMESH
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namespace Subdivider { // BEGIN_NS_DECIMATER
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namespace Uniform { // BEGIN_NS_DECIMATER
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//== CLASS DEFINITION =========================================================
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/** Uniform composite Loop subdivision algorithm
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*/
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template <class MeshType, class RealType=float>
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class CompositeLoopT : public CompositeT<MeshType, RealType>
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{
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public:
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typedef CompositeT<MeshType, RealType> Inherited;
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public:
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CompositeLoopT() : Inherited() {};
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CompositeLoopT(MeshType& _mesh) : Inherited(_mesh) {};
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~CompositeLoopT() {}
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public:
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const char *name() const { return "Uniform Composite Loop"; }
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protected: // inherited interface
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void apply_rules(void)
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{
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Inherited::Tvv4();
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Inherited::VdE();
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Inherited::EVc(coeffs_);
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Inherited::VdE();
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Inherited::EVc(coeffs_);
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}
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protected:
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typedef typename Inherited::Coeff Coeff;
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/** Helper struct
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* \internal
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*/
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struct EVCoeff : public Coeff
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{
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EVCoeff() : Coeff() { init(50); }
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void init(size_t _max_valence)
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{
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weights_.resize(_max_valence);
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std::generate(weights_.begin(),
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weights_.end(), compute_weight() );
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}
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double operator()(size_t _valence) { return weights_[_valence]; }
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/// \internal
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struct compute_weight
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{
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compute_weight() : val_(0) { }
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double operator()(void) // Loop weights for non-boundary vertices
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{
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// 1 3 2 * pi
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// - * ( --- + cos ( ------- ) )<29> - 1.0
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// 2 2 valence
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double f1 = 1.5 + cos(2.0*M_PI/val_++);
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return 0.5 * f1 * f1 - 1.0;
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}
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size_t val_;
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};
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std::vector<double> weights_;
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} coeffs_;
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};
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//=============================================================================
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} // END_NS_UNIFORM
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} // END_NS_SUBDIVIDER
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} // END_NS_OPENMESH
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//=============================================================================
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#endif // OPENMESH_SUBDIVIDER_UNIFORM_COMPOSITELOOPT_HH defined
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//=============================================================================
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