134 lines
4.3 KiB
C
134 lines
4.3 KiB
C
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkSurfaceLICMapper.h
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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/**
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* @class vtkSurfaceLICMapper
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* @brief mapper that performs LIC on the surface of
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* arbitrary geometry.
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*
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*
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* vtkSurfaceLICMapper performs LIC on the surface of arbitrary
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* geometry. Point vectors are used as the vector field for generating the LIC.
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* The implementation was originallu based on "Image Space Based Visualization
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* on Unsteady Flow on Surfaces" by Laramee, Jobard and Hauser appeared in
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* proceedings of IEEE Visualization '03, pages 131-138.
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*
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* Internal pipeline:
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* <pre>
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* noise
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* |
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* [ PROJ (GAT) (COMP) LIC2D (SCAT) SHADE (CCE) DEP]
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* | |
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* vectors surface LIC
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* </pre>
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* PROj - project vectors onto surface
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* GAT - gather data for compositing and guard pixel generation (parallel only)
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* COMP - composite gathered data
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* LIC2D - line intengral convolution, see vtkLineIntegralConvolution2D.
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* SCAT - scatter result (parallel only, not all compositors use it)
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* SHADE - combine LIC and scalar colors
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* CCE - color contrast enhancement (optional)
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* DEP - depth test and copy to back buffer
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*
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* The result of each stage is cached in a texture so that during interaction
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* a stage may be skipped if the user has not modified its parameters or input
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* data.
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*
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* The parallel parts of algorithm are implemented in vtkPSurfaceLICMapper.
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* Note that for MPI enabled builds this class will be automatically created
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* by the object factory.
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*
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* @sa
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* vtkLineIntegralConvolution2D
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*/
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#ifndef vtkSurfaceLICMapper_h
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#define vtkSurfaceLICMapper_h
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#include "vtkOpenGLPolyDataMapper.h"
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#include "vtkRenderingLICOpenGL2Module.h" // For export macro
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class vtkSurfaceLICInterface;
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class vtkPainterCommunicator;
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class VTKRENDERINGLICOPENGL2_EXPORT vtkSurfaceLICMapper : public vtkOpenGLPolyDataMapper
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{
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public:
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static vtkSurfaceLICMapper* New();
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vtkTypeMacro(vtkSurfaceLICMapper, vtkOpenGLPolyDataMapper);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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/**
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* Release any graphics resources that are being consumed by this mapper.
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* The parameter window could be used to determine which graphic
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* resources to release. In this case, releases the display lists.
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*/
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void ReleaseGraphicsResources(vtkWindow* win) override;
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/**
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* Implemented by sub classes. Actual rendering is done here.
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*/
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void RenderPiece(vtkRenderer* ren, vtkActor* act) override;
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/**
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* Shallow copy of an actor.
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*/
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void ShallowCopy(vtkAbstractMapper*) override;
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///@{
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/**
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* Get the vtkSurfaceLICInterface used by this mapper
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*/
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vtkGetObjectMacro(LICInterface, vtkSurfaceLICInterface);
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///@}
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protected:
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vtkSurfaceLICMapper();
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~vtkSurfaceLICMapper() override;
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/**
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* Methods used for parallel benchmarks. Use cmake to define
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* vtkSurfaceLICMapperTIME to enable benchmarks. During each
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* update timing information is stored, it can be written to
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* disk by calling WriteLog.
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*/
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virtual void StartTimerEvent(const char*) {}
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virtual void EndTimerEvent(const char*) {}
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/**
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* Build the VBO/IBO, called by UpdateBufferObjects
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*/
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void BuildBufferObjects(vtkRenderer* ren, vtkActor* act) override;
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protected:
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/**
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* Set the shader parameters related to the mapper/input data, called by UpdateShader
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*/
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void SetMapperShaderParameters(vtkOpenGLHelper& cellBO, vtkRenderer* ren, vtkActor* act) override;
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/**
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* Perform string replacements on the shader templates
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*/
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void ReplaceShaderValues(
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std::map<vtkShader::Type, vtkShader*> shaders, vtkRenderer* ren, vtkActor* act) override;
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vtkSurfaceLICInterface* LICInterface;
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private:
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vtkSurfaceLICMapper(const vtkSurfaceLICMapper&) = delete;
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void operator=(const vtkSurfaceLICMapper&) = delete;
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};
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#endif
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