Implement a post-processing edge detection with a Sobel gradient magnitude render pass.
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| virtual vtkTypeBool | IsA (const char *type) |
| | Return 1 if this class is the same type of (or a subclass of) the named class.
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| vtkSobelGradientMagnitudePass * | NewInstance () const |
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| void | PrintSelf (ostream &os, vtkIndent indent) override |
| | Methods invoked by print to print information about the object including superclasses.
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| void | Render (const vtkRenderState *s) override |
| | Perform rendering according to a render state s.
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| void | ReleaseGraphicsResources (vtkWindow *w) override |
| | Release graphics resources and ask components to release their own resources.
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| virtual vtkTypeBool | IsA (const char *type) |
| | Return 1 if this class is the same type of (or a subclass of) the named class.
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| vtkImageProcessingPass * | NewInstance () const |
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| void | PrintSelf (ostream &os, vtkIndent indent) override |
| | Methods invoked by print to print information about the object including superclasses.
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| void | ReleaseGraphicsResources (vtkWindow *w) override |
| | Release graphics resources and ask components to release their own resources.
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| virtual vtkRenderPass * | GetDelegatePass () |
| | Delegate for rendering the image to be processed.
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| virtual void | SetDelegatePass (vtkRenderPass *delegatePass) |
| | Delegate for rendering the image to be processed.
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| virtual vtkTypeBool | IsA (const char *type) |
| | Return 1 if this class is the same type of (or a subclass of) the named class.
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| vtkOpenGLRenderPass * | NewInstance () const |
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| void | PrintSelf (ostream &os, vtkIndent indent) override |
| | Methods invoked by print to print information about the object including superclasses.
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| virtual bool | SetShaderParameters (vtkShaderProgram *program, vtkAbstractMapper *mapper, vtkProp *prop, vtkOpenGLVertexArrayObject *VAO=nullptr) |
| | Update the uniforms of the shader program.
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| virtual vtkMTimeType | GetShaderStageMTime () |
| | For multi-stage render passes that need to change shader code during a single pass, use this method to notify a mapper that the shader needs to be rebuilt (rather than reuse the last cached shader.
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| virtual void | SetActiveDrawBuffers (unsigned int) |
| | Number of active draw buffers.
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| virtual unsigned int | GetActiveDrawBuffers () |
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| virtual bool | PreReplaceShaderValues (std::string &vertexShader, std::string &geometryShader, std::string &fragmentShader, vtkAbstractMapper *mapper, vtkProp *prop) |
| | Use vtkShaderProgram::Substitute to replace.
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| virtual bool | PostReplaceShaderValues (std::string &vertexShader, std::string &geometryShader, std::string &fragmentShader, vtkAbstractMapper *mapper, vtkProp *prop) |
| | Use vtkShaderProgram::Substitute to replace.
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| virtual vtkTypeBool | IsA (const char *type) |
| | Return 1 if this class is the same type of (or a subclass of) the named class.
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| vtkRenderPass * | NewInstance () const |
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| void | PrintSelf (ostream &os, vtkIndent indent) override |
| | Methods invoked by print to print information about the object including superclasses.
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| virtual void | Render (const vtkRenderState *s)=0 |
| | Perform rendering according to a render state s.
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| virtual void | ReleaseGraphicsResources (vtkWindow *w) |
| | Release graphics resources and ask components to release their own resources.
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| virtual int | GetNumberOfRenderedProps () |
| | Number of props rendered at the last Render call.
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| | vtkBaseTypeMacro (vtkObject, vtkObjectBase) |
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| virtual void | DebugOn () |
| | Turn debugging output on.
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| virtual void | DebugOff () |
| | Turn debugging output off.
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| bool | GetDebug () |
| | Get the value of the debug flag.
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| void | SetDebug (bool debugFlag) |
| | Set the value of the debug flag.
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| virtual void | Modified () |
| | Update the modification time for this object.
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| virtual vtkMTimeType | GetMTime () |
| | Return this object's modified time.
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| void | PrintSelf (ostream &os, vtkIndent indent) override |
| | Methods invoked by print to print information about the object including superclasses.
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| void | RemoveObserver (unsigned long tag) |
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| void | RemoveObservers (unsigned long event) |
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| void | RemoveObservers (const char *event) |
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| void | RemoveAllObservers () |
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| vtkTypeBool | HasObserver (unsigned long event) |
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| vtkTypeBool | HasObserver (const char *event) |
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| int | InvokeEvent (unsigned long event) |
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| int | InvokeEvent (const char *event) |
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| unsigned long | AddObserver (unsigned long event, vtkCommand *, float priority=0.0f) |
| | Allow people to add/remove/invoke observers (callbacks) to any VTK object.
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| unsigned long | AddObserver (const char *event, vtkCommand *, float priority=0.0f) |
| | Allow people to add/remove/invoke observers (callbacks) to any VTK object.
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| vtkCommand * | GetCommand (unsigned long tag) |
| | Allow people to add/remove/invoke observers (callbacks) to any VTK object.
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| void | RemoveObserver (vtkCommand *) |
| | Allow people to add/remove/invoke observers (callbacks) to any VTK object.
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| void | RemoveObservers (unsigned long event, vtkCommand *) |
| | Allow people to add/remove/invoke observers (callbacks) to any VTK object.
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| void | RemoveObservers (const char *event, vtkCommand *) |
| | Allow people to add/remove/invoke observers (callbacks) to any VTK object.
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| vtkTypeBool | HasObserver (unsigned long event, vtkCommand *) |
| | Allow people to add/remove/invoke observers (callbacks) to any VTK object.
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| vtkTypeBool | HasObserver (const char *event, vtkCommand *) |
| | Allow people to add/remove/invoke observers (callbacks) to any VTK object.
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| template<class U , class T > |
| unsigned long | AddObserver (unsigned long event, U observer, void(T::*callback)(), float priority=0.0f) |
| | Overloads to AddObserver that allow developers to add class member functions as callbacks for events.
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| template<class U , class T > |
| unsigned long | AddObserver (unsigned long event, U observer, void(T::*callback)(vtkObject *, unsigned long, void *), float priority=0.0f) |
| | Overloads to AddObserver that allow developers to add class member functions as callbacks for events.
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| template<class U , class T > |
| unsigned long | AddObserver (unsigned long event, U observer, bool(T::*callback)(vtkObject *, unsigned long, void *), float priority=0.0f) |
| | Allow user to set the AbortFlagOn() with the return value of the callback method.
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| int | InvokeEvent (unsigned long event, void *callData) |
| | This method invokes an event and return whether the event was aborted or not.
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| int | InvokeEvent (const char *event, void *callData) |
| | This method invokes an event and return whether the event was aborted or not.
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| const char * | GetClassName () const |
| | Return the class name as a string.
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| virtual vtkTypeBool | IsA (const char *name) |
| | Return 1 if this class is the same type of (or a subclass of) the named class.
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| virtual vtkIdType | GetNumberOfGenerationsFromBase (const char *name) |
| | Given the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class).
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| virtual void | Delete () |
| | Delete a VTK object.
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| virtual void | FastDelete () |
| | Delete a reference to this object.
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| void | InitializeObjectBase () |
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| void | Print (ostream &os) |
| | Print an object to an ostream.
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| virtual void | Register (vtkObjectBase *o) |
| | Increase the reference count (mark as used by another object).
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| virtual void | UnRegister (vtkObjectBase *o) |
| | Decrease the reference count (release by another object).
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| int | GetReferenceCount () |
| | Return the current reference count of this object.
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| void | SetReferenceCount (int) |
| | Sets the reference count.
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| bool | GetIsInMemkind () const |
| | A local state flag that remembers whether this object lives in the normal or extended memory space.
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| virtual void | PrintHeader (ostream &os, vtkIndent indent) |
| | Methods invoked by print to print information about the object including superclasses.
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| virtual void | PrintTrailer (ostream &os, vtkIndent indent) |
| | Methods invoked by print to print information about the object including superclasses.
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| static vtkSobelGradientMagnitudePass * | New () |
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| static vtkTypeBool | IsTypeOf (const char *type) |
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| static vtkSobelGradientMagnitudePass * | SafeDownCast (vtkObjectBase *o) |
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| static vtkTypeBool | IsTypeOf (const char *type) |
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| static vtkImageProcessingPass * | SafeDownCast (vtkObjectBase *o) |
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| static vtkTypeBool | IsTypeOf (const char *type) |
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| static vtkOpenGLRenderPass * | SafeDownCast (vtkObjectBase *o) |
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| static vtkInformationObjectBaseVectorKey * | RenderPasses () |
| | Key containing information about the current pass.
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| static vtkTypeBool | IsTypeOf (const char *type) |
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| static vtkRenderPass * | SafeDownCast (vtkObjectBase *o) |
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| static vtkObject * | New () |
| | Create an object with Debug turned off, modified time initialized to zero, and reference counting on.
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| static void | BreakOnError () |
| | This method is called when vtkErrorMacro executes.
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| static void | SetGlobalWarningDisplay (int val) |
| | This is a global flag that controls whether any debug, warning or error messages are displayed.
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| static void | GlobalWarningDisplayOn () |
| | This is a global flag that controls whether any debug, warning or error messages are displayed.
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| static void | GlobalWarningDisplayOff () |
| | This is a global flag that controls whether any debug, warning or error messages are displayed.
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| static int | GetGlobalWarningDisplay () |
| | This is a global flag that controls whether any debug, warning or error messages are displayed.
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| static vtkTypeBool | IsTypeOf (const char *name) |
| | Return 1 if this class type is the same type of (or a subclass of) the named class.
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| static vtkIdType | GetNumberOfGenerationsFromBaseType (const char *name) |
| | Given a the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class).
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| static vtkObjectBase * | New () |
| | Create an object with Debug turned off, modified time initialized to zero, and reference counting on.
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| static void | SetMemkindDirectory (const char *directoryname) |
| | The name of a directory, ideally mounted -o dax, to memory map an extended memory space within.
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| static bool | GetUsingMemkind () |
| | A global state flag that controls whether vtkObjects are constructed in the usual way (the default) or within the extended memory space.
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| virtual vtkObjectBase * | NewInstanceInternal () const |
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| | vtkSobelGradientMagnitudePass () |
| | Default constructor.
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| | ~vtkSobelGradientMagnitudePass () override |
| | Destructor.
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| virtual vtkObjectBase * | NewInstanceInternal () const |
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| | vtkImageProcessingPass () |
| | Default constructor.
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| | ~vtkImageProcessingPass () override |
| | Destructor.
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| void | RenderDelegate (const vtkRenderState *s, int width, int height, int newWidth, int newHeight, vtkOpenGLFramebufferObject *fbo, vtkTextureObject *target) |
| | Render delegate with a image of different dimensions than the original one.
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| virtual vtkObjectBase * | NewInstanceInternal () const |
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| | vtkOpenGLRenderPass () |
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| | ~vtkOpenGLRenderPass () override |
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| void | PreRender (const vtkRenderState *s) |
| | Call before rendering to update the actors' information keys.
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| void | PostRender (const vtkRenderState *s) |
| | Call after rendering to clean up the actors' information keys.
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| virtual vtkObjectBase * | NewInstanceInternal () const |
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| | vtkRenderPass () |
| | Default constructor.
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| | ~vtkRenderPass () override |
| | Destructor.
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| void | UpdateCamera (vtkRenderer *renderer) |
| | Call UpdateCamera() on Renderer.
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| void | ClearLights (vtkRenderer *renderer) |
| | Call ClearLights() on Renderer.
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| void | UpdateLightGeometry (vtkRenderer *renderer) |
| | Call UpdateLightGeometry() on Renderer.
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| void | UpdateLights (vtkRenderer *renderer) |
| | Call UpdateLights() on Renderer.
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| void | UpdateGeometry (vtkRenderer *renderer, vtkFrameBufferObjectBase *fbo=nullptr) |
| | Call UpdateGeometry() on Renderer.
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| void | SetLastRenderingUsedDepthPeeling (vtkRenderer *renderer, bool value) |
| | Modify protected member LastRenderingUsedDepthPeeling on Renderer.
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| | vtkObject () |
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| | ~vtkObject () override |
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| void | RegisterInternal (vtkObjectBase *, vtkTypeBool check) override |
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| void | UnRegisterInternal (vtkObjectBase *, vtkTypeBool check) override |
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| void | InternalGrabFocus (vtkCommand *mouseEvents, vtkCommand *keypressEvents=nullptr) |
| | These methods allow a command to exclusively grab all events.
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| void | InternalReleaseFocus () |
| | These methods allow a command to exclusively grab all events.
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| | vtkObjectBase () |
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| virtual | ~vtkObjectBase () |
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| virtual void | RegisterInternal (vtkObjectBase *, vtkTypeBool check) |
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| virtual void | UnRegisterInternal (vtkObjectBase *, vtkTypeBool check) |
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| virtual void | ReportReferences (vtkGarbageCollector *) |
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| | vtkObjectBase (const vtkObjectBase &) |
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| void | operator= (const vtkObjectBase &) |
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Implement a post-processing edge detection with a Sobel gradient magnitude render pass.
Detect the edges of the image renderered by its delegate. Edge-detection uses a Sobel high-pass filter (3x3 kernel).
This pass expects an initialized depth buffer and color buffer. Initialized buffers means they have been cleared with farest z-value and background color/gradient/transparent color. An opaque pass may have been performed right after the initialization.
The delegate is used once.
Its delegate is usually set to a vtkCameraPass or to a post-processing pass.
This pass requires a OpenGL context that supports texture objects (TO), framebuffer objects (FBO) and GLSL. If not, it will emit an error message and will render its delegate and return.
- Implementation:
- To compute the gradient magnitude, the x and y components of the gradient (Gx and Gy) have to be computed first. Each computation of Gx and Gy uses a separable filter. The first pass takes the image from the delegate as the single input texture. The first pass has two outputs, one for the first part of Gx, Gx1, result of a convolution with (-1 0 1), one for the first part of Gy, Gy1, result of a convolution with (1 2 1). The second pass has two inputs, Gx1 and Gy1. Kernel (1 2 1)^T is applied to Gx1 and kernel (-1 0 1)^T is applied to Gx2. It gives the values for Gx and Gy. Those values are then used to compute the magnitude of the gradient which is stored in the render target. The gradient computation happens per component (R,G,B). A is arbitrarily set to 1 (full opacity).
- Implementation:
-
- See also
- vtkRenderPass
Definition at line 72 of file vtkSobelGradientMagnitudePass.h.
Public Types inherited from vtkImageProcessingPass
1.9.6