VTK  9.1.0
vtkDepthPeelingPass.h
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1 /*=========================================================================
2 
3  Program: Visualization Toolkit
4  Module: vtkDepthPeelingPass.h
5 
6  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
7  All rights reserved.
8  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
9 
10  This software is distributed WITHOUT ANY WARRANTY; without even
11  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
12  PURPOSE. See the above copyright notice for more information.
13 
14 =========================================================================*/
50 #ifndef vtkDepthPeelingPass_h
51 #define vtkDepthPeelingPass_h
52 
53 #include "vtkOpenGLRenderPass.h"
54 #include "vtkRenderingOpenGL2Module.h" // For export macro
55 #include <vector> // STL Header
56 
58 class vtkTextureObject;
60 class vtkOpenGLState;
62 
63 class VTKRENDERINGOPENGL2_EXPORT vtkDepthPeelingPass : public vtkOpenGLRenderPass
64 {
65 public:
68  void PrintSelf(ostream& os, vtkIndent indent) override;
69 
74  void Render(const vtkRenderState* s) override;
75 
82 
84 
90  vtkGetObjectMacro(TranslucentPass, vtkRenderPass);
91  virtual void SetTranslucentPass(vtkRenderPass* translucentPass);
93 
95 
104  vtkSetClampMacro(OcclusionRatio, double, 0.0, 0.5);
105  vtkGetMacro(OcclusionRatio, double);
107 
109 
114  vtkSetMacro(MaximumNumberOfPeels, int);
115  vtkGetMacro(MaximumNumberOfPeels, int);
117 
118  // vtkOpenGLRenderPass virtuals:
119  bool PostReplaceShaderValues(std::string& vertexShader, std::string& geometryShader,
120  std::string& fragmentShader, vtkAbstractMapper* mapper, vtkProp* prop) override;
122  vtkOpenGLVertexArrayObject* VAO = nullptr) override;
123 
124  // Set Opaque Z texture, this must be set from the outer FO
126 
127  // Set Opaque RGBA texture, this must be set from the outer FO
129 
134  vtkSetMacro(DepthFormat, int);
135 
136 protected:
141 
146 
149 
151 
159 
170 
177 
179 
182 
183  // obtained from the outer FO, we read from them
188 
189  // each peel merges two color buffers into one result
190  vtkTextureObject* TranslucentRGBATexture[3];
193 
194  // each peel compares a prior Z and writes to next
195  vtkTextureObject* TranslucentZTexture[2];
197 
200 
201  // useful to store
203 
204 private:
205  vtkDepthPeelingPass(const vtkDepthPeelingPass&) = delete;
206  void operator=(const vtkDepthPeelingPass&) = delete;
207 };
208 
209 #endif
abstract class specifies interface to map data
Implement Depth Peeling for use within a framebuffer pass.
vtkOpenGLQuadHelper * FinalBlend
virtual void SetTranslucentPass(vtkRenderPass *translucentPass)
Delegate for rendering the translucent polygonal geometry.
void SetOpaqueRGBATexture(vtkTextureObject *)
bool PostReplaceShaderValues(std::string &vertexShader, std::string &geometryShader, std::string &fragmentShader, vtkAbstractMapper *mapper, vtkProp *prop) override
Use vtkShaderProgram::Substitute to replace.
vtkDepthPeelingPass()
Default constructor.
void BlendFinalPeel(vtkOpenGLRenderWindow *renWin)
~vtkDepthPeelingPass() override
Destructor.
int MaximumNumberOfPeels
In case of depth peeling, define the maximum number of peeling layers.
double OcclusionRatio
In case of use of depth peeling technique for rendering translucent material, define the threshold un...
static vtkDepthPeelingPass * New()
void SetOpaqueZTexture(vtkTextureObject *)
vtkTextureObject * OpaqueZTexture
int ViewportY
Cache viewport values for depth peeling.
bool SetShaderParameters(vtkShaderProgram *program, vtkAbstractMapper *mapper, vtkProp *prop, vtkOpenGLVertexArrayObject *VAO=nullptr) override
Update the uniforms of the shader program.
vtkOpenGLQuadHelper * IntermediateBlend
int ViewportX
Cache viewport values for depth peeling.
vtkTextureObject * OpaqueRGBATexture
vtkOpenGLFramebufferObject * Framebuffer
void PrintSelf(ostream &os, vtkIndent indent) override
Methods invoked by print to print information about the object including superclasses.
int ViewportHeight
Cache viewport values for depth peeling.
void BlendIntermediatePeels(vtkOpenGLRenderWindow *renWin, bool)
vtkOpenGLState * State
int ViewportWidth
Cache viewport values for depth peeling.
void ReleaseGraphicsResources(vtkWindow *w) override
Release graphics resources and ask components to release their own resources.
vtkRenderPass * TranslucentPass
void Render(const vtkRenderState *s) override
Perform rendering according to a render state s.
a simple class to control print indentation
Definition: vtkIndent.h:34
Internal class which encapsulates OpenGL FramebufferObject.
Class to make rendering a full screen quad easier.
Abstract render pass with shader modifications.
OpenGL rendering window.
OpenGL state storage.
The VertexArrayObject class uses, or emulates, vertex array objects.
abstract superclass for all actors, volumes and annotations
Definition: vtkProp.h:57
Perform part of the rendering of a vtkRenderer.
Definition: vtkRenderPass.h:57
Context in which a vtkRenderPass will render.
The ShaderProgram uses one or more Shader objects.
abstracts an OpenGL texture object.
record modification and/or execution time
Definition: vtkTimeStamp.h:33
window superclass for vtkRenderWindow
Definition: vtkWindow.h:39
@ string
Definition: vtkX3D.h:496