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134 lines
5.1 KiB
134 lines
5.1 KiB
3 months ago
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/*===========================================================================*\
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* *
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* IsoEx *
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* Copyright (C) 2002 by Computer Graphics Group, RWTH Aachen *
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* www.rwth-graphics.de *
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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 Library General Public License as published *
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* by the Free Software Foundation, version 2. *
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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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* Library General Public License for more details. *
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* *
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* You should have received a copy of the GNU Library 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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//
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// CLASS Implicit
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//
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//=============================================================================
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#ifndef ISOEX_IMPLICIT_HH
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#define ISOEX_IMPLICIT_HH
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//== INCLUDES =================================================================
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#include <OpenMesh/Core/Geometry/VectorT.hh>
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#include <IsoEx/Config/IsoExDefines.hh>
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#include "IsoSurfGen/TinyVector.h"
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#include <vector>
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//== NAMESPACES ===============================================================
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namespace IsoEx {
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//== CLASS DEFINITION =========================================================
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/** \class Implicit Implicit.hh <IsoEx/Implicits/Implicit.hh>
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This is the abstract base class for all objects representing implicit
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function. The three abstract virtual functions have to be overridden
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by derived classes.
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\ingroup implicits
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*/
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template< class Vec3 >
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class ISOEXDLLEXPORT Implicit
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{
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public:
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typedef typename Vec3::value_type real;
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/// \name Constructor & destructor
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//@{
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/// constructor
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Implicit() {}
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/// destructor
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virtual ~Implicit() {}
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//@}
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/// \name Abstract interface of implicit objects
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//@{
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/** Is the point \b _point inside or outside w.r.t. the implicit
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function? The result should be the same as scalar_distance(_point)
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< 0, but it can be implemented more efficiently.
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*/
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virtual bool is_inside(const Vec3& _point, const real _isovalue = 0) const = 0;
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/** Returns the <em>scalar distance</em> value of \b _point. Points
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inside the object should have negative distances, points outside
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positive distance.
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*/
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virtual real scalar_distance(const Vec3& _point) const = 0;
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/** This method returns the <em>directed distance</em> of \b _p0 in
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the direction <b>_p1-_p0</b>. The resulting intersection point
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(casting a ray from _p0 in direction (_p1-_p0)) is stored in \b
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_point, the corresponding normal vector at this point is stored
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in \b _normal, the distance value is stored in _distance (again
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negative distance means \b _p0 is inside). Since the ray
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intersection may fail (because of precision problems) it is
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returned whether an intersection was found or not.
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*/
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virtual bool directed_distance(const Vec3& _p0,
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const Vec3& _p1,
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Vec3& _point,
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Vec3& _normal,
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real& _distance,
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const real _isovalue = 0
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) const = 0;
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virtual void directed_distance(
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const std::vector<TinyVector<real, 3>>& _p0vec,
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const std::vector<TinyVector<real, 3>>& _p1vec,
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const std::vector<real>& _p0vec_values,
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const std::vector<real>& _p1vec_values,
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std::vector<TinyVector<real, 3>>& _point,
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std::vector<TinyVector<real, 3>>& _normal,
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const real _isovalue = 0) const = 0;
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virtual void scalar_value(
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const std::vector<TinyVector<real, 3>>& pvec,
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std::vector<real>& vec_values) const = 0;
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//@}
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};
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//=============================================================================
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} // namespace IsoEx
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//=============================================================================
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#endif // ISOEX_IMPLICITSPHERE_HH defined
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//=============================================================================
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