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114 lines
3.2 KiB
C
114 lines
3.2 KiB
C
3 weeks ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkOrderIndependentTranslucentPass.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 vtkOrderIndependentTranslucentPass
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* @brief Implement OIT rendering using average color
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*
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* Simple version that uses average alpha weighted color
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* and correct final computed alpha. Single pass approach.
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*
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* @sa
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* vtkRenderPass, vtkTranslucentPass, vtkFramebufferPass
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*/
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#ifndef vtkOrderIndependentTranslucentPass_h
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#define vtkOrderIndependentTranslucentPass_h
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#include "vtkOpenGLRenderPass.h"
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#include "vtkRenderingOpenGL2Module.h" // For export macro
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class vtkOpenGLFramebufferObject;
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class vtkTextureObject;
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class vtkOpenGLRenderWindow;
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class vtkOpenGLState;
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class vtkOpenGLQuadHelper;
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class VTKRENDERINGOPENGL2_EXPORT vtkOrderIndependentTranslucentPass : public vtkOpenGLRenderPass
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{
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public:
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static vtkOrderIndependentTranslucentPass* New();
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vtkTypeMacro(vtkOrderIndependentTranslucentPass, vtkOpenGLRenderPass);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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/**
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* Perform rendering according to a render state \p s.
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* \pre s_exists: s!=0
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*/
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void Render(const vtkRenderState* s) override;
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/**
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* Release graphics resources and ask components to release their own
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* resources.
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* \pre w_exists: w!=0
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*/
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void ReleaseGraphicsResources(vtkWindow* w) override;
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//@{
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/**
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* Delegate for rendering the translucent polygonal geometry.
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* If it is NULL, nothing will be rendered and a warning will be emitted.
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* It is usually set to a vtkTranslucentPass.
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* Initial value is a NULL pointer.
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*/
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vtkGetObjectMacro(TranslucentPass, vtkRenderPass);
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virtual void SetTranslucentPass(vtkRenderPass* translucentPass);
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//@}
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// vtkOpenGLRenderPass virtuals:
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bool PostReplaceShaderValues(std::string& vertexShader, std::string& geometryShader,
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std::string& fragmentShader, vtkAbstractMapper* mapper, vtkProp* prop) override;
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protected:
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/**
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* Default constructor. TranslucentPass is set to NULL.
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*/
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vtkOrderIndependentTranslucentPass();
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/**
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* Destructor.
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*/
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~vtkOrderIndependentTranslucentPass() override;
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vtkRenderPass* TranslucentPass;
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//@{
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/**
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* Cache viewport values for depth peeling.
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*/
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int ViewportX;
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int ViewportY;
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int ViewportWidth;
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int ViewportHeight;
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//@}
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vtkOpenGLFramebufferObject* Framebuffer;
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vtkOpenGLQuadHelper* FinalBlend;
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vtkTextureObject* TranslucentRGBATexture;
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vtkTextureObject* TranslucentRTexture;
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vtkTextureObject* TranslucentZTexture;
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void BlendFinalPeel(vtkOpenGLRenderWindow* renWin);
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// useful to store
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vtkOpenGLState* State;
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private:
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vtkOrderIndependentTranslucentPass(const vtkOrderIndependentTranslucentPass&) = delete;
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void operator=(const vtkOrderIndependentTranslucentPass&) = delete;
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};
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#endif
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