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Diffstat (limited to 'source/blender/freestyle/intern/geometry/Polygon.h')
| -rwxr-xr-x | source/blender/freestyle/intern/geometry/Polygon.h | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/source/blender/freestyle/intern/geometry/Polygon.h b/source/blender/freestyle/intern/geometry/Polygon.h new file mode 100755 index 00000000000..911804d80f7 --- /dev/null +++ b/source/blender/freestyle/intern/geometry/Polygon.h @@ -0,0 +1,214 @@ +// +// Filename : Polygon.h +// Author(s) : Stephane Grabli +// Purpose : Class to define a polygon +// Date of creation : 30/07/2002 +// +/////////////////////////////////////////////////////////////////////////////// + + +// +// Copyright (C) : Please refer to the COPYRIGHT file distributed +// with this source distribution. +// +// This program is free software; you can redistribute it and/or +// modify it under the terms of the GNU General Public License +// as published by the Free Software Foundation; either version 2 +// of the License, or (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +// +/////////////////////////////////////////////////////////////////////////////// + +#ifndef POLYGON_H +# define POLYGON_H + +# include <vector> +# include "Geom.h" +# include "GeomUtils.h" + +using namespace std; + +namespace Geometry { + +template <class Point> +class Polygon +{ + public: + + inline Polygon() { + _id = 0; + userdata = 0; + userdata2 = 0; + } + + inline Polygon(const vector<Point>& vertices) { + _vertices = vertices; + computeBBox(); + _id = 0; + userdata = 0; + userdata2 = 0; + } + + inline Polygon(const Polygon<Point>& poly) { + Point p; + for(typename vector<Point>::const_iterator it = poly.getVertices().begin(); + it != poly.getVertices().end(); + it++) { + p = *it; + _vertices.push_back(p); + } + + _id = poly.getId(); + poly.getBBox(_min, _max); + userdata = 0; + userdata2 = 0; + } + + virtual ~Polygon() {} + + // + // Accessors + // + ///////////////////////////////////////////////////////////////////////////// + + inline const vector<Point>& getVertices() const { + return _vertices; + } + + inline void getBBox(Point& min, Point& max) const { + min = _min; + max = _max; + } + + inline Point& getBBoxCenter() + { + Point result; + result = (_min + _max) / 2; + return result; + } + + inline Point& getCenter() { + Point result; + for (typename vector<Point>::iterator it = _vertices.begin(); + it != _vertices.end(); + it++) + result += *it; + result /= _vertices.size(); + return result; + } + + inline unsigned getId() const { + return _id; + } + + // + // Modifiers + // + ///////////////////////////////////////////////////////////////////////////// + + inline void setVertices(const vector<Point>& vertices) { + _vertices.clear(); + Point p; + for (typename vector<Point>::const_iterator it = vertices.begin(); + it != vertices.end(); + it++) { + p = *it; + _vertices.push_back(p); + } + computeBBox(); + } + + inline void setId(unsigned id) { + _id = id; + } + + // + // Other methods + // + ///////////////////////////////////////////////////////////////////////////// + + inline void computeBBox() { + if(_vertices.empty()) + return; + + _max = _vertices[0]; + _min = _vertices[0]; + + for(typename vector<Point>::iterator it = _vertices.begin(); + it != _vertices.end(); + it++) { + for(unsigned i = 0; i < Point::dim(); i++) { + if((*it)[i] > _max[i]) + _max[i] = (*it)[i]; + if((*it)[i] < _min[i]) + _min[i] = (*it)[i]; + } + } + } + + // FIXME Is it possible to get rid of userdatas ? + void* userdata; + void* userdata2; // Used during ray casting + + protected: + + vector<Point> _vertices; + Point _min; + Point _max; + unsigned _id; +}; + + +// +// Polygon3r class +// +/////////////////////////////////////////////////////////////////////////////// + +class Polygon3r : public Polygon<Vec3r> +{ + public: + inline Polygon3r() : Polygon<Vec3r>() {} + + inline Polygon3r(const vector<Vec3r>& vertices, + const Vec3r& normal) : Polygon<Vec3r>(vertices) { + setNormal(normal); + } + + inline Polygon3r(const Polygon3r& poly) : Polygon<Vec3r>(poly), _normal(poly._normal) {} + + virtual ~Polygon3r() {} + + void setNormal(const Vec3r& normal) { + _normal = normal; + } + + inline Vec3r getNormal() const { + return _normal; + } + + /*! Check whether the Polygon intersects with the ray or not */ + inline bool rayIntersect(const Vec3r& orig, const Vec3r& dir, + real& t, real& u, real& v, real epsilon = M_EPSILON) const { + // if (_vertices.size() < 3) + // return false; + return GeomUtils::intersectRayTriangle(orig, dir, + _vertices[0], _vertices[1], _vertices[2], + t, u, v, epsilon); + } + + private: + + Vec3r _normal; +}; + +} // end of namespace Geometry + +#endif // POLYGON_H |