mirror of https://github.com/CGAL/cgal
103 lines
2.5 KiB
C++
103 lines
2.5 KiB
C++
// Copyright (c) 2005-2007 INRIA Sophia-Antipolis (France).
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// All rights reserved.
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//
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// This file is part of CGAL (www.cgal.org); you may redistribute it under
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// the terms of the Q Public License version 1.0.
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// See the file LICENSE.QPL distributed with CGAL.
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//
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// Licensees holding a valid commercial license may use this file in
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// accordance with the commercial license agreement provided with the software.
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//
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// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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//
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// $Source: /proj/geometrica/home/CGAL/Local/cvsroot/InrImage/include/CGAL/Isosurface.h,v $
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// $Revision$ $Date$
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// $Name: $
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//
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// Author(s) : Laurent RINEAU
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#ifndef CGAL_MESH_3_GRAY_LEVEL_IMAGE_3_H
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#define CGAL_MESH_3_GRAY_LEVEL_IMAGE_3_H
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#include <CGAL/basic.h>
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/* Copy-paste from <imageio/ImageIO.h> */
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extern "C" {
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struct _image;
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_image* _readImage(const char *name);
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bool _get_image_bounding_box(_image*,
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float*, float*, float*,
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float*, float*, float*);
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void convertImageTypeToFloat(_image* image);
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float triLinInterp(_image* image,float posx, float posy, float posz);
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}
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/* End of copy-paste from <imageio/ImageIO.h> */
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namespace CGAL {
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template <typename FT, typename Point>
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class Gray_level_image_3
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{
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_image *image;
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float isovalue;
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float min_x, min_y, min_z;
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float max_x, max_y, max_z;
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bool is_valid;
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public:
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Gray_level_image_3(const char* file, float isoval)
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: image(0),
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isovalue(isoval),
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min_x(0.f),
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min_y(0.f),
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min_z(0.f),
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max_x(0.f),
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max_y(0.f),
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max_z(0.f),
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is_valid(false)
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{
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image = ::_readImage(file);
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if( image != 0 )
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{
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is_valid = true;
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::convertImageTypeToFloat(image);
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isovalue=isoval;
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::_get_image_bounding_box(image,
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&min_x, &min_y, &min_z,
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&max_x, &max_y, &max_z);
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}
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}
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bool inside(float X, float Y, float Z) const
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{
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return ( X>=min_x && Y>=min_y && Z>=min_z &&
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X<=max_x && Y<=max_y && Z<=max_z );
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}
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FT operator()(Point p) const
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{
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float X=static_cast<float>(to_double(p.x()));
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float Y=static_cast<float>(to_double(p.y()));
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float Z=static_cast<float>(to_double(p.z()));
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if (!inside(X,Y,Z))
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return FT(1);
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else{
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float value = ::triLinInterp(image, X, Y, Z);
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if (value > isovalue) // inside
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return FT(-1);
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else if (value < isovalue) // outside
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return FT(1);
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else
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return FT(0);
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}
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}
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}; // end Gray_level_image_3
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} // end namespace CGAL
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#endif // CGAL_MESH_3_GRAY_LEVEL_IMAGE_3_H
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