vtkOpenGLGlyph3DHelper.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
 
#ifndef vtkOpenGLGlyph3DHelper_h
#define vtkOpenGLGlyph3DHelper_h
 
#include "vtkNew.h"                   // For vtkNew
#include "vtkOpenGLBufferObject.h"    // For vtkOpenGLBufferObject
#include "vtkOpenGLHelper.h"          // For vtkOpenGLHelper
#include "vtkOpenGLInstanceCulling.h" // For vtkOpenGLInstanceCulling
#include "vtkOpenGLPolyDataMapper.h"
#include "vtkRenderingOpenGL2Module.h" // For export macro
#include "vtkSmartPointer.h"           // For vtkSmartPointer
 
VTK_ABI_NAMESPACE_BEGIN
class vtkBitArray;
class vtkTextureObject;
 
class VTKRENDERINGOPENGL2_EXPORT vtkOpenGLGlyph3DHelper : public vtkOpenGLPolyDataMapper
{
public:
  static vtkOpenGLGlyph3DHelper* New();
  vtkTypeMacro(vtkOpenGLGlyph3DHelper, vtkOpenGLPolyDataMapper);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  void GlyphRender(vtkRenderer* ren, vtkActor* actor, vtkIdType numPts,
    std::vector<unsigned char>& colors, std::vector<float>& matrices,
    std::vector<float>& normalMatrices, std::vector<vtkIdType>& pickIds, vtkMTimeType pointMTime,
    bool culling);
 
  void SetLODs(std::vector<std::pair<float, float>>& lods);
 
  void SetLODColoring(bool val);

  void ReleaseGraphicsResources(vtkWindow* window) override;
 
protected:
  vtkOpenGLGlyph3DHelper();
  ~vtkOpenGLGlyph3DHelper() override = default;
 
  // special opengl 32 version that uses instances
  void GlyphRenderInstances(vtkRenderer* ren, vtkActor* actor, vtkIdType numPts,
    std::vector<unsigned char>& colors, std::vector<float>& matrices,
    std::vector<float>& normalMatrices, vtkMTimeType pointMTime, bool culling);

  void GetShaderTemplate(
    std::map<vtkShader::Type, vtkShader*> shaders, vtkRenderer* ren, vtkActor* act) override;


  void ReplaceShaderValues(
    std::map<vtkShader::Type, vtkShader*> shaders, vtkRenderer* ren, vtkActor* actor) override;
  void ReplaceShaderPicking(
    std::map<vtkShader::Type, vtkShader*> shaders, vtkRenderer* ren, vtkActor* act) override;
  void ReplaceShaderColor(
    std::map<vtkShader::Type, vtkShader*> shaders, vtkRenderer* ren, vtkActor* act) override;
  void ReplaceShaderNormal(
    std::map<vtkShader::Type, vtkShader*> shaders, vtkRenderer* ren, vtkActor* act) override;
  void ReplaceShaderClip(
    std::map<vtkShader::Type, vtkShader*> shaders, vtkRenderer* ren, vtkActor* act) override;
  void ReplaceShaderPositionVC(
    std::map<vtkShader::Type, vtkShader*> shaders, vtkRenderer* ren, vtkActor* act) override;
  void ReplaceShaderPointSize(
    std::map<vtkShader::Type, vtkShader*> shaders, vtkRenderer* ren, vtkActor* act);
  void ReplaceShaderWideLines(
    std::map<vtkShader::Type, vtkShader*> shaders, vtkRenderer* ren, vtkActor* act);

  void SetMapperShaderParameters(vtkOpenGLHelper& cellBO, vtkRenderer* ren, vtkActor* act) override;
 
  void BuildCullingShaders(vtkRenderer* ren, vtkActor* actor, vtkIdType numPts, bool withNormals);
 
  bool UsingInstancing;
 
  vtkNew<vtkOpenGLBufferObject> NormalMatrixBuffer;
  vtkNew<vtkOpenGLBufferObject> MatrixBuffer;
  vtkNew<vtkOpenGLBufferObject> ColorBuffer;
  vtkTimeStamp InstanceBuffersBuildTime;
  vtkTimeStamp InstanceBuffersLoadTime;
 
  std::vector<std::pair<float, float>> LODs;
  vtkNew<vtkOpenGLInstanceCulling> InstanceCulling;
 
private:
  vtkOpenGLGlyph3DHelper(const vtkOpenGLGlyph3DHelper&) = delete;
  void operator=(const vtkOpenGLGlyph3DHelper&) = delete;


  float CachedLineWidth = -1.0;
  std::vector<float> LineWidthOffsets;
  vtkSmartPointer<vtkTextureObject> LineWidthOffsetsTexture;
};
 
VTK_ABI_NAMESPACE_END
#endif