Added normal cone type to OpenMesh
git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@458 fdac6126-5c0c-442c-9429-916003d36597
This commit is contained in:
Jan Möbius
153
src/OpenMesh/Core/Geometry/NormalConeT.cc
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153
src/OpenMesh/Core/Geometry/NormalConeT.cc
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/*===========================================================================*\
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* *
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* OpenMesh *
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* Copyright (C) 2001-2011 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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* This file is part of OpenMesh. *
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* *
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* OpenMesh is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU Lesser General Public License as *
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* published by the Free Software Foundation, either version 3 of *
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* the License, or (at your option) any later version with the *
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* following exceptions: *
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* *
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* If other files instantiate templates or use macros *
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* or inline functions from this file, or you compile this file and *
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* link it with other files to produce an executable, this file does *
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* not by itself cause the resulting executable to be covered by the *
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* GNU Lesser General Public License. This exception does not however *
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* invalidate any other reasons why the executable file might be *
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* covered by the GNU Lesser General Public License. *
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* *
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* OpenMesh is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU Lesser General Public License for more details. *
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* *
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* You should have received a copy of the GNU LesserGeneral Public *
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* License along with OpenMesh. If not, *
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* see <http://www.gnu.org/licenses/>. *
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* *
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\*===========================================================================*/
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/*===========================================================================*\
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* *
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* $Revision$ *
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* $Date$ *
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* *
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\*===========================================================================*/
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//=============================================================================
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//
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// CLASS NormalConeT - IMPLEMENTATION
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//
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//=============================================================================
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#define OPENMESH_NORMALCONE_C
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//== INCLUDES =================================================================
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#include <math.h>
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#include "NormalConeT.hh"
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#ifdef max
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# undef max
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#endif
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#ifdef min
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# undef min
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#endif
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//== NAMESPACES ===============================================================
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namespace OpenMesh {
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//== IMPLEMENTATION ==========================================================
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template <typename Scalar>
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NormalConeT<Scalar>::
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NormalConeT(const Vec3& _center_normal, Scalar _angle)
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: center_normal_(_center_normal), angle_(_angle)
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{
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}
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//----------------------------------------------------------------------------
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template <typename Scalar>
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Scalar
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NormalConeT<Scalar>::
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max_angle(const Vec3& _norm) const
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{
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Scalar dotp = (center_normal_ | _norm);
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return (dotp >= 1.0 ? 0.0 : (dotp <= -1.0 ? M_PI : acos(dotp)))
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+ angle_;
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}
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//----------------------------------------------------------------------------
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template <typename Scalar>
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Scalar
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NormalConeT<Scalar>::
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max_angle(const NormalConeT& _cone) const
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{
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Scalar dotp = (center_normal_ | _cone.center_normal_);
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Scalar centerAngle = dotp >= 1.0 ? 0.0 : (dotp <= -1.0 ? M_PI : acos(dotp));
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Scalar sideAngle0 = std::max(angle_-centerAngle, _cone.angle_);
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Scalar sideAngle1 = std::max(_cone.angle_-centerAngle, angle_);
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return centerAngle + sideAngle0 + sideAngle1;
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}
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//----------------------------------------------------------------------------
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template <typename Scalar>
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void
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NormalConeT<Scalar>::
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merge(const NormalConeT& _cone)
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{
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Scalar dotp = (center_normal_ | _cone.center_normal_);
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if (fabs(dotp) < 0.99999)
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{
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// new angle
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Scalar centerAngle = acos(dotp);
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Scalar minAngle = std::min(-angle(), centerAngle - _cone.angle());
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Scalar maxAngle = std::max( angle(), centerAngle + _cone.angle());
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angle_ = 0.5 * (maxAngle - minAngle);
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// axis by SLERP
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Scalar axisAngle = 0.5*(minAngle + maxAngle);
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center_normal_ = ((center_normal_ * sin(centerAngle-axisAngle)
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+ _cone.center_normal_ * sin(axisAngle))
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/ sin(centerAngle));
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}
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else
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{
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// axes point in same direction
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if (dotp > 0.0)
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angle_ = std::max(angle_, _cone.angle_);
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// axes point in opposite directions
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else
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angle_ = 2*M_PI;
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}
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}
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//=============================================================================
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} // namespace OpenMesh
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//=============================================================================
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124
src/OpenMesh/Core/Geometry/NormalConeT.hh
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124
src/OpenMesh/Core/Geometry/NormalConeT.hh
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@@ -0,0 +1,124 @@
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/*===========================================================================*\
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* *
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* OpenMesh *
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* Copyright (C) 2001-2011 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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* This file is part of OpenMesh. *
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* *
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* OpenMesh is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU Lesser General Public License as *
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* published by the Free Software Foundation, either version 3 of *
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* the License, or (at your option) any later version with the *
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* following exceptions: *
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* *
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* If other files instantiate templates or use macros *
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* or inline functions from this file, or you compile this file and *
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* link it with other files to produce an executable, this file does *
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* not by itself cause the resulting executable to be covered by the *
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* GNU Lesser General Public License. This exception does not however *
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* invalidate any other reasons why the executable file might be *
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* covered by the GNU Lesser General Public License. *
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* *
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* OpenMesh is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU Lesser General Public License for more details. *
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* *
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* You should have received a copy of the GNU LesserGeneral Public *
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* License along with OpenMesh. If not, *
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* see <http://www.gnu.org/licenses/>. *
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* *
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\*===========================================================================*/
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/*===========================================================================*\
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* *
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* $Revision$ *
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* $Date$ *
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* *
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\*===========================================================================*/
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//=============================================================================
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//
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// CLASS NormalCone
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//
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//=============================================================================
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#ifndef OPENMESH_NORMALCONE_HH
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#define OPENMESH_NORMALCONE_HH
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//== INCLUDES =================================================================
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#include <OpenMesh/Core/Geometry/VectorT.hh>
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//== NAMESPACES ===============================================================
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namespace OpenMesh {
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//== CLASS DEFINITION =========================================================
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/** /class NormalCone NormalCone.hh <ACG/Geometry/Types/NormalCone.hh>
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NormalCone that can be merged with other normal cones. Provides
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the center normal and the opening angle.
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**/
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template <typename Scalar>
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class NormalConeT
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{
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public:
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// typedefs
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typedef VectorT<Scalar, 3> Vec3;
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//! default constructor (not initialized)
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NormalConeT() {}
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//! Initialize cone with center (unit vector) and angle (radius in radians)
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NormalConeT(const Vec3& _center_normal, Scalar _angle=0.0);
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//! return max. distance (radians) unit vector to cone (distant side)
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Scalar max_angle(const Vec3&) const;
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//! return max. distance (radians) cone to cone (distant sides)
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Scalar max_angle(const NormalConeT&) const;
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//! merge _cone; this instance will then enclose both former cones
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void merge(const NormalConeT&);
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//! returns center normal
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const Vec3& center_normal() const { return center_normal_; }
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//! returns size of cone (radius in radians)
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Scalar angle() const { return angle_; }
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private:
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Vec3 center_normal_;
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Scalar angle_;
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};
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//=============================================================================
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} // namespace OpenMesh
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//=============================================================================
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#if defined(INCLUDE_TEMPLATES) && !defined(OPENMESH_NORMALCONE_C)
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#define OPENMESH_NORMALCONE_TEMPLATES
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#include "NormalConeT.cc"
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#endif
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//=============================================================================
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#endif // OPENMESH_NORMALCONE_HH defined
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//=============================================================================
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