c434782e3a
Use a shorter/simpler license convention, stops the header taking so much space. Follow the SPDX license specification: https://spdx.org/licenses - C/C++/objc/objc++ - Python - Shell Scripts - CMake, GNUmakefile While most of the source tree has been included - `./extern/` was left out. - `./intern/cycles` & `./intern/atomic` are also excluded because they use different header conventions. doc/license/SPDX-license-identifiers.txt has been added to list SPDX all used identifiers. See P2788 for the script that automated these edits. Reviewed By: brecht, mont29, sergey Ref D14069
123 lines
3.4 KiB
C++
123 lines
3.4 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#pragma once
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/** \file
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* \ingroup freestyle
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* \brief Class to perform all geometric operations dedicated to silhouette. That, for example,
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* implies that this geom engine has as member data the viewpoint, transformations, projections...
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*/
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#include <vector>
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#include "../geometry/Geom.h"
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#include "../system/FreestyleConfig.h"
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#ifdef WITH_CXX_GUARDEDALLOC
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# include "MEM_guardedalloc.h"
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#endif
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namespace Freestyle {
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using namespace Geometry;
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class SVertex;
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class FEdge;
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class SilhouetteGeomEngine {
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private:
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// The viewpoint under which the silhouette has to be computed
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static Vec3r _Viewpoint;
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static real _translation[3];
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// the model view matrix (_modelViewMatrix[i][j] means element of line i and column j)
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static real _modelViewMatrix[4][4];
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// the projection matrix (_projectionMatrix[i][j] means element of line i and column j)
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static real _projectionMatrix[4][4];
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// the global transformation from world to screen (projection included)
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// (_transform[i][j] means element of line i and column j)
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static real _transform[4][4];
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// the viewport
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static int _viewport[4];
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static real _Focal;
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static real _znear;
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static real _zfar;
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// GL style (column major) projection matrix
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static real _glProjectionMatrix[4][4];
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// GL style (column major) model view matrix
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static real _glModelViewMatrix[4][4];
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static bool _isOrthographicProjection;
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static SilhouetteGeomEngine *_pInstance;
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public:
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/** retrieves an instance on the singleton */
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static SilhouetteGeomEngine *getInstance()
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{
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if (_pInstance == NULL) {
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_pInstance = new SilhouetteGeomEngine;
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}
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return _pInstance;
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}
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/** Sets the current viewpoint */
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static inline void setViewpoint(const Vec3r &ivp)
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{
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_Viewpoint = ivp;
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}
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/** Sets the current transformation
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* iModelViewMatrix
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* The 4x4 model view matrix, in column major order (openGL like).
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* iProjection matrix
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* The 4x4 projection matrix, in column major order (openGL like).
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* iViewport
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* The viewport. 4 real array: origin.x, origin.y, width, length
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* iFocal
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* The focal length
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*/
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static void setTransform(const real iModelViewMatrix[4][4],
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const real iProjectionMatrix[4][4],
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const int iViewport[4],
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real iFocal);
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/** Sets the current znear and zfar */
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static void setFrustum(real iZNear, real iZFar);
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/* accessors */
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static void retrieveViewport(int viewport[4]);
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/** Projects the silhouette in camera coordinates
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* This method modifies the ioEdges passed as argument.
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* ioVertices
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* The vertices to project. It is modified during the operation.
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*/
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static void ProjectSilhouette(std::vector<SVertex *> &ioVertices);
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static void ProjectSilhouette(SVertex *ioVertex);
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/** transforms the parameter t defining a 2D intersection for edge fe in order to obtain
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* the parameter giving the corresponding 3D intersection.
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* Returns the 3D parameter
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* fe
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* The edge
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* t
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* The parameter for the 2D intersection.
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*/
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static real ImageToWorldParameter(FEdge *fe, real t);
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/** From world to image */
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static Vec3r WorldToImage(const Vec3r &M);
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/** From camera to image */
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static Vec3r CameraToImage(const Vec3r &M);
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#ifdef WITH_CXX_GUARDEDALLOC
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MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:SilhouetteGeomEngine")
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#endif
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};
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} /* namespace Freestyle */
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