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Diffstat (limited to 'source/blender/freestyle/intern/view_map/SilhouetteGeomEngine.h')
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1 files changed, 136 insertions, 0 deletions
diff --git a/source/blender/freestyle/intern/view_map/SilhouetteGeomEngine.h b/source/blender/freestyle/intern/view_map/SilhouetteGeomEngine.h new file mode 100644 index 00000000000..d6ee159fe88 --- /dev/null +++ b/source/blender/freestyle/intern/view_map/SilhouetteGeomEngine.h @@ -0,0 +1,136 @@ +/* + * ***** BEGIN GPL LICENSE BLOCK ***** + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * The Original Code is Copyright (C) 2010 Blender Foundation. + * All rights reserved. + * + * The Original Code is: all of this file. + * + * Contributor(s): none yet. + * + * ***** END GPL LICENSE BLOCK ***** + */ + +#ifndef __FREESTYLE_SILHOUETTE_GEOM_ENGINE_H__ +#define __FREESTYLE_SILHOUETTE_GEOM_ENGINE_H__ + +/** \file blender/freestyle/intern/view_map/SilhouetteGeomEngine.h + * \ingroup freestyle + * \brief Class to perform all geometric operations dedicated to silhouette. That, for example, implies that + * this geom engine has as member data the viewpoint, transformations, projections... + * \author Stephane Grabli + * \date 03/09/2002 + */ + +#include <vector> + +#include "../geometry/Geom.h" + +#include "../system/FreestyleConfig.h" + +using namespace Geometry; + +class SVertex; +class FEdge; + +class LIB_VIEW_MAP_EXPORT SilhouetteGeomEngine +{ +private: + // The viewpoint under which the silhouette has to be computed + static Vec3r _Viewpoint; + static real _translation[3]; + // the model view matrix (_modelViewMatrix[i][j] means element of line i and column j) + static real _modelViewMatrix[4][4]; + // the projection matrix (_projectionMatrix[i][j] means element of line i and column j) + static real _projectionMatrix[4][4]; + // the global transformation from world to screen (projection included) + // (_transform[i][j] means element of line i and column j) + static real _transform[4][4]; + // the viewport + static int _viewport[4]; + static real _Focal; + + static real _znear; + static real _zfar; + + // GL style (column major) projection matrix + static real _glProjectionMatrix[4][4]; + // GL style (column major) model view matrix + static real _glModelViewMatrix[4][4]; + + static bool _isOrthographicProjection; + + static SilhouetteGeomEngine *_pInstance; + +public: + /*! retrieves an instance on the singleton */ + static SilhouetteGeomEngine *getInstance() + { + if(0 == _pInstance) { + _pInstance = new SilhouetteGeomEngine; + } + return _pInstance; + } + + /*! Sets the current viewpoint */ + static inline void setViewpoint(const Vec3r& ivp) + { + _Viewpoint = ivp; + } + + /*! Sets the current transformation + * iModelViewMatrix + * The 4x4 model view matrix, in column major order (openGL like). + * iProjection matrix + * The 4x4 projection matrix, in column major order (openGL like). + * iViewport + * The viewport. 4 real array: origin.x, origin.y, width, length + * iFocal + * The focal length + */ + static void setTransform(const real iModelViewMatrix[4][4], const real iProjectionMatrix[4][4], + const int iViewport[4], real iFocal); + + /*! Sets the current znear and zfar */ + static void setFrustum(real iZNear, real iZFar); + + /* accessors */ + static void retrieveViewport(int viewport[4]); + + /*! Projects the silhouette in camera coordinates + * This method modifies the ioEdges passed as argument. + * ioVertices + * The vertices to project. It is modified during the operation. + */ + static void ProjectSilhouette(std::vector<SVertex*>& ioVertices); + static void ProjectSilhouette(SVertex *ioVertex); + + /*! transforms the parameter t defining a 2D intersection for edge fe in order to obtain + * the parameter giving the corresponding 3D intersection. + * Returns the 3D parameter + * fe + * The edge + * t + * The parameter for the 2D intersection. + */ + static real ImageToWorldParameter(FEdge *fe, real t); + + /*! From world to image */ + static Vec3r WorldToImage(const Vec3r& M); +}; + +#endif // __FREESTYLE_SILHOUETTE_GEOM_ENGINE_H__ |