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117 lines
4.0 KiB
C
117 lines
4.0 KiB
C
3 weeks ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkCoincidentTopologyResolutionPainter.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 vtkCoincidentTopologyResolutionPainter
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* @brief painter that resolves
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* conicident topology.
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*
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* Provides the ability to shift the z-buffer to resolve coincident topology.
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* For example, if you'd like to draw a mesh with some edges a different color,
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* and the edges lie on the mesh, this feature can be useful to get nice
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* looking lines.
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*/
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#ifndef vtkCoincidentTopologyResolutionPainter_h
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#define vtkCoincidentTopologyResolutionPainter_h
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#include "vtkRenderingOpenGLModule.h" // For export macro
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#include "vtkPolyDataPainter.h"
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class vtkInformationIntegerKey;
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class vtkInformationDoubleKey;
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class vtkInformationDoubleVectorKey;
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class VTKRENDERINGOPENGL_EXPORT vtkCoincidentTopologyResolutionPainter :
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public vtkPolyDataPainter
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{
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public:
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static vtkCoincidentTopologyResolutionPainter* New();
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vtkTypeMacro(vtkCoincidentTopologyResolutionPainter,
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vtkPolyDataPainter);
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void PrintSelf(ostream& os, vtkIndent indent);
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/**
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* Set/Get a global flag that controls whether coincident topology (e.g., a
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* line on top of a polygon) is shifted to avoid z-buffer resolution (and
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* hence rendering problems). If not off, there are two methods to choose
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* from. PolygonOffset uses graphics systems calls to shift polygons, but
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* does not distinguish vertices and lines from one another. ShiftZBuffer
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* remaps the z-buffer to distinguish vertices, lines, and polygons, but
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* does not always produce acceptable results. If you use the ShiftZBuffer
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* approach, you may also want to set the ResolveCoincidentTopologyZShift
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* value. (Note: not all mappers/graphics systems implement this
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* functionality.)
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*/
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static vtkInformationIntegerKey* RESOLVE_COINCIDENT_TOPOLOGY();
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/**
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* Used to set the z-shift if ResolveCoincidentTopology is set to
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* ShiftZBuffer.
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*/
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static vtkInformationDoubleKey* Z_SHIFT();
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/**
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* Used to set the polygon offset scale factor and units. Used when
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* ResolveCoincidentTopology is set to PolygonOffset.
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*/
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static vtkInformationDoubleVectorKey* POLYGON_OFFSET_PARAMETERS();
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/**
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* When set and when RESOLVE_COINCIDENT_TOPOLOGY is set to use polygon offset,
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* solid polygonal faces will be offsetted, otherwise lines/vertices will be
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* offsetted.
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*/
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static vtkInformationIntegerKey* POLYGON_OFFSET_FACES();
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protected:
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vtkCoincidentTopologyResolutionPainter();
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~vtkCoincidentTopologyResolutionPainter();
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/**
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* Called before RenderInternal() if the Information has been changed
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* since the last time this method was called.
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*/
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virtual void ProcessInformation(vtkInformation*);
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// These are method to set ivars. These are purpisefully protected.
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// The only means to affect these values is thru information object.
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vtkSetMacro(ResolveCoincidentTopology, int);
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vtkSetMacro(ZShift, double);
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vtkSetMacro(OffsetFaces, int);
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void SetPolygonOffsetParameters(double factor, double units)
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{
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if (this->PolygonOffsetFactor != factor ||
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this->PolygonOffsetUnits != units)
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{
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this->PolygonOffsetFactor = factor;
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this->PolygonOffsetUnits = units;
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this->Modified();
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}
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}
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int ResolveCoincidentTopology;
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double PolygonOffsetFactor;
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double PolygonOffsetUnits;
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double ZShift;
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int OffsetFaces;
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private:
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vtkCoincidentTopologyResolutionPainter(const vtkCoincidentTopologyResolutionPainter&) VTK_DELETE_FUNCTION;
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void operator=(const vtkCoincidentTopologyResolutionPainter&) VTK_DELETE_FUNCTION;
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};
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#endif
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