VTK
Public Types | Public Member Functions | Static Public Member Functions | Protected Member Functions | Protected Attributes
vtkSmartVolumeMapper Class Reference

Adaptive volume mapper. More...

#include <vtkSmartVolumeMapper.h>

Inheritance diagram for vtkSmartVolumeMapper:
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Collaboration diagram for vtkSmartVolumeMapper:
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List of all members.

Public Types

enum  {
  DefaultRenderMode = 0, RayCastAndTextureRenderMode, RayCastRenderMode, TextureRenderMode,
  GPURenderMode, UndefinedRenderMode, InvalidRenderMode
}
enum  {
  DefaultRenderMode = 0, RayCastAndTextureRenderMode, RayCastRenderMode, TextureRenderMode,
  GPURenderMode, UndefinedRenderMode, InvalidRenderMode
}
typedef vtkVolumeMapper Superclass
typedef vtkVolumeMapper Superclass

Public Member Functions

virtual int IsA (const char *type)
vtkSmartVolumeMapperNewInstance () const
void PrintSelf (ostream &os, vtkIndent indent)
void SetRequestedRenderMode (int mode)
void SetRequestedRenderModeToDefault ()
void SetRequestedRenderModeToRayCastAndTexture ()
void SetRequestedRenderModeToRayCast ()
int GetLastUsedRenderMode ()
void Render (vtkRenderer *, vtkVolume *)
virtual int IsA (const char *type)
vtkSmartVolumeMapperNewInstance () const
void PrintSelf (ostream &os, vtkIndent indent)
void SetRequestedRenderMode (int mode)
void SetRequestedRenderModeToDefault ()
void SetRequestedRenderModeToRayCast ()
int GetLastUsedRenderMode ()
void Render (vtkRenderer *, vtkVolume *)
virtual void SetFinalColorWindow (float)
virtual float GetFinalColorWindow ()
virtual void SetFinalColorLevel (float)
virtual float GetFinalColorLevel ()
virtual int GetRequestedRenderMode ()
virtual void SetInteractiveUpdateRate (double)
virtual double GetInteractiveUpdateRate ()
virtual void SetMaxMemoryInBytes (vtkIdType)
virtual vtkIdType GetMaxMemoryInBytes ()
virtual void SetMaxMemoryFraction (float)
virtual float GetMaxMemoryFraction ()
virtual void SetInterpolationMode (int)
virtual int GetInterpolationMode ()
void SetInterpolationModeToNearestNeighbor ()
void SetInterpolationModeToLinear ()
void SetInterpolationModeToCubic ()
void CreateCanonicalView (vtkRenderer *ren, vtkVolume *volume, vtkVolume *volume2, vtkImageData *image, int blend_mode, double viewDirection[3], double viewUp[3])
void ReleaseGraphicsResources (vtkWindow *)
virtual void SetFinalColorWindow (float)
virtual float GetFinalColorWindow ()
virtual void SetFinalColorLevel (float)
virtual float GetFinalColorLevel ()
virtual int GetRequestedRenderMode ()
virtual void SetInteractiveUpdateRate (double)
virtual double GetInteractiveUpdateRate ()
virtual void SetMaxMemoryInBytes (vtkIdType)
virtual vtkIdType GetMaxMemoryInBytes ()
virtual void SetMaxMemoryFraction (float)
virtual float GetMaxMemoryFraction ()
virtual void SetInterpolationMode (int)
virtual int GetInterpolationMode ()
void SetInterpolationModeToNearestNeighbor ()
void SetInterpolationModeToLinear ()
void SetInterpolationModeToCubic ()
void CreateCanonicalView (vtkRenderer *ren, vtkVolume *volume, vtkVolume *volume2, vtkImageData *image, int blend_mode, double viewDirection[3], double viewUp[3])
void ReleaseGraphicsResources (vtkWindow *)

Static Public Member Functions

static vtkSmartVolumeMapperNew ()
static int IsTypeOf (const char *type)
static vtkSmartVolumeMapperSafeDownCast (vtkObjectBase *o)
static vtkSmartVolumeMapperNew ()
static int IsTypeOf (const char *type)
static vtkSmartVolumeMapperSafeDownCast (vtkObjectBase *o)

Protected Member Functions

virtual vtkObjectBaseNewInstanceInternal () const
 vtkSmartVolumeMapper ()
 ~vtkSmartVolumeMapper ()
void ConnectMapperInput (vtkVolumeMapper *m)
void ConnectFilterInput (vtkImageResample *f)
void Initialize (vtkRenderer *ren, vtkVolume *vol)
void ComputeRenderMode (vtkRenderer *ren, vtkVolume *vol)
virtual vtkObjectBaseNewInstanceInternal () const
 vtkSmartVolumeMapper ()
 ~vtkSmartVolumeMapper ()
void ConnectMapperInput (vtkVolumeMapper *m)
void ConnectFilterInput (vtkImageResample *f)
void Initialize (vtkRenderer *ren, vtkVolume *vol)
void ComputeRenderMode (vtkRenderer *ren, vtkVolume *vol)

Protected Attributes

float FinalColorWindow
float FinalColorLevel
vtkIdType MaxMemoryInBytes
float MaxMemoryFraction
int InterpolationMode
int RequestedRenderMode
int CurrentRenderMode
int Initialized
vtkTimeStamp SupportStatusCheckTime
int TextureSupported
int GPUSupported
int RayCastSupported
int LowResGPUNecessary
vtkImageResampleGPUResampleFilter
double InteractiveUpdateRate
vtkGPUVolumeRayCastMapperGPULowResMapper
vtkGPUVolumeRayCastMapperGPUMapper
vtkFixedPointVolumeRayCastMapperRayCastMapper
vtkVolumeTextureMapper3DTextureMapper
int InitializedBlendMode

Detailed Description

Adaptive volume mapper.

vtkSmartVolumeMapper is a volume mapper that will delegate to a specific volume mapper based on rendering parameters and available hardware. Use the SetRequestedRenderMode() method to control the behavior of the selection. The following options are available:

vtkSmartVolumeMapper::DefaultRenderMode:
Allow the vtkSmartVolumeMapper to select the best mapper based on rendering parameters and hardware support. If GPU ray casting is supported, this mapper will be used for all rendering. If not, then if 3D texture mapping is supported, it will be used for interactive rendering and the vtkFixedPointRayCastMapper will be used for still rendering. If 3D texture mapping is not supported, then the vtkFixedPointRayCastMapper will be used exclusively. This is the default requested render mode, and is generally the best option. When you use this option, your volume will always be rendered, but the method used to render it may vary based on parameters and platform.
vtkSmartVolumeMapper::RayCastAndTextureRenderMode:
Use the vtkVolumeTextureMapper3D for interactive rendering, and the vtkFixedPointVolumeRayCastMapper for still renders. If 3D texture mapping is not supported, then the ray caster will be used exclusively. When you use this option your volume will always be rendered, but the method used for interactive rendering will vary based on parameters and platform. The decision on whether a particular render is interactive or still is based on the adjustable parameter InteractiveUpdateRate. If the DesiredUpdateRate found in the vtkRenderWindow that initiated the Render is at or above the InteractiveUpdateRate value, then the render is considered interactive, otherwise it is considered a still render.
vtkSmartVolumeMapper::RayCastRenderMode:
Use the vtkFixedPointVolumeRayCastMapper for both interactive and still rendering. When you use this option your volume will always be rendered with the vtkFixedPointVolumeRayCastMapper.
vtkSmartVolumeMapper::TextureRenderMode:
Use the vtkVolumeTextureMapper3D, if supported, for both interactive and still rendering. If 3D texture mapping is not supported (either by the hardware, or due to the rendering parameters) then no image will be rendered. Use this option only if you have already checked for support based on the current hardware, number of scalar components, and rendering parameters in the vtkVolumeProperty. Also note that the vtkVolumeTextureMapper3D does not support window / level operations on the final image, so FinalColorWindow must be at the default value of 1.0 and FinalColorLevel must be at the default value of 0.5.
vtkSmartVolumeMapper::GPURenderMode:
Use the vtkGPUVolumeRayCastMapper, if supported, for both interactive and still rendering. If the GPU ray caster is not supported (due to hardware limitations or rendering parameters) then no image will be rendered. Use this option only if you have already checked for supported based on the current hardware, number of scalar components, and rendering parameters in the vtkVolumeProperty.
vtkSmartVolumeMapper::GPURenderMode:
You can adjust the contrast and brightness in the rendered image using the FinalColorWindow and FinalColorLevel ivars. By default the FinalColorWindow is set to 1.0, and the FinalColorLevel is set to 0.5, which applies no correction to the computed image. To apply the window / level operation to the computer image color, first a Scale and Bias value are computed:
  scale = 1.0 / this->FinalColorWindow
  bias  = 0.5 - this->FinalColorLevel / this->FinalColorWindow
  
To compute a new color (R', G', B', A') from an existing color (R,G,B,A) for a pixel, the following equation is used:
  R' = R*scale + bias*A
  G' = G*scale + bias*A
  B' = B*scale + bias*A
  A' = A
  
Note that bias is multiplied by the alpha component before adding because the red, green, and blue component of the color are already pre-multiplied by alpha. Also note that the window / level operation leaves the alpha component unchanged - it only adjusts the RGB values.
Examples:
vtkSmartVolumeMapper (Examples)
Tests:
vtkSmartVolumeMapper (Tests)

vtkSmartVolumeMapper is a volume mapper that will delegate to a specific volume mapper based on rendering parameters and available hardware. Use the SetRequestedRenderMode() method to control the behavior of the selection. The following options are available:

vtkSmartVolumeMapper::DefaultRenderMode:
Allow the vtkSmartVolumeMapper to select the best mapper based on rendering parameters and hardware support. If GPU ray casting is supported, this mapper will be used for all rendering. If not, then the vtkFixedPointRayCastMapper will be used exclusively. This is the default requested render mode, and is generally the best option. When you use this option, your volume will always be rendered, but the method used to render it may vary based on parameters and platform.
vtkSmartVolumeMapper::RayCastRenderMode:
Use the vtkFixedPointVolumeRayCastMapper for both interactive and still rendering. When you use this option your volume will always be rendered with the vtkFixedPointVolumeRayCastMapper.
vtkSmartVolumeMapper::GPURenderMode:
Use the vtkGPUVolumeRayCastMapper, if supported, for both interactive and still rendering. If the GPU ray caster is not supported (due to hardware limitations or rendering parameters) then no image will be rendered. Use this option only if you have already checked for supported based on the current hardware, number of scalar components, and rendering parameters in the vtkVolumeProperty.
vtkSmartVolumeMapper::GPURenderMode:
You can adjust the contrast and brightness in the rendered image using the FinalColorWindow and FinalColorLevel ivars. By default the FinalColorWindow is set to 1.0, and the FinalColorLevel is set to 0.5, which applies no correction to the computed image. To apply the window / level operation to the computer image color, first a Scale and Bias value are computed:
  scale = 1.0 / this->FinalColorWindow
  bias  = 0.5 - this->FinalColorLevel / this->FinalColorWindow
  
To compute a new color (R', G', B', A') from an existing color (R,G,B,A) for a pixel, the following equation is used:
  R' = R*scale + bias*A
  G' = G*scale + bias*A
  B' = B*scale + bias*A
  A' = A
  
Note that bias is multiplied by the alpha component before adding because the red, green, and blue component of the color are already pre-multiplied by alpha. Also note that the window / level operation leaves the alpha component unchanged - it only adjusts the RGB values.

Definition at line 123 of file vtkSmartVolumeMapper.h.


Member Typedef Documentation

Reimplemented from vtkVolumeMapper.

Definition at line 127 of file vtkSmartVolumeMapper.h.

Reimplemented from vtkVolumeMapper.

Definition at line 90 of file vtkSmartVolumeMapper.h.


Member Enumeration Documentation

anonymous enum
Enumerator:
DefaultRenderMode 
RayCastAndTextureRenderMode 
RayCastRenderMode 
TextureRenderMode 
GPURenderMode 
UndefinedRenderMode 
InvalidRenderMode 

Definition at line 160 of file vtkSmartVolumeMapper.h.

anonymous enum
Enumerator:
DefaultRenderMode 
RayCastAndTextureRenderMode 
RayCastRenderMode 
TextureRenderMode 
GPURenderMode 
UndefinedRenderMode 
InvalidRenderMode 

Definition at line 123 of file vtkSmartVolumeMapper.h.


Constructor & Destructor Documentation


Member Function Documentation

Create an object with Debug turned off, modified time initialized to zero, and reference counting on.

Reimplemented from vtkAlgorithm.

static int vtkSmartVolumeMapper::IsTypeOf ( const char *  name) [static]

Return 1 if this class type is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkVolumeMapper.

virtual int vtkSmartVolumeMapper::IsA ( const char *  name) [virtual]

Return 1 if this class is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkVolumeMapper.

Reimplemented from vtkVolumeMapper.

virtual vtkObjectBase* vtkSmartVolumeMapper::NewInstanceInternal ( ) const [protected, virtual]

Reimplemented from vtkVolumeMapper.

Reimplemented from vtkVolumeMapper.

void vtkSmartVolumeMapper::PrintSelf ( ostream &  os,
vtkIndent  indent 
) [virtual]

Methods invoked by print to print information about the object including superclasses. Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.

Reimplemented from vtkVolumeMapper.

virtual void vtkSmartVolumeMapper::SetFinalColorWindow ( float  ) [virtual]

Set the final color window. This controls the contrast of the image. The default value is 1.0. The Window can be negative (this causes a "negative" effect on the image) Although Window can be set to 0.0, any value less than 0.00001 and greater than or equal to 0.0 will be set to 0.00001, and any value greater than -0.00001 but less than or equal to 0.0 will be set to -0.00001. Initial value is 1.0.

Get the final color window. Initial value is 1.0.

virtual void vtkSmartVolumeMapper::SetFinalColorLevel ( float  ) [virtual]

Set the final color level. The level controls the brightness of the image. The final color window will be centered at the final color level, and together represent a linear remapping of color values. The default value for the level is 0.5.

Get the final color level.

Set the requested render mode. The default is vtkSmartVolumeMapper::DefaultRenderMode.

Set the requested render mode to vtkSmartVolumeMapper::DefaultRenderMode. This is the best option for an application that must adapt to different data types, hardware, and rendering parameters.

Set the requested render mode to vtkSmartVolumeMapper::RayCastAndTextureRenderMode. This is a good option if you want to avoid using advanced OpenGL functionality, but would still like to used 3D texture mapping, if available, for interactive rendering.

Set the requested render mode to vtkSmartVolumeMapper::RayCastRenderMode. This option will use software rendering exclusively. This is a good option if you know there is no hardware acceleration.

Get the requested render mode.

Set the rate at or above this render will be considered interactive. If the DesiredUpdateRate of the vtkRenderWindow that caused the Render falls at or above this rate, the render is considered interactive and the mapper may be adjusted (depending on the render mode). Initial value is 1.0.

Get the update rate at or above which this is considered an interactive render. Initial value is 1.0.

This will return the render mode used during the previous call to Render().

Value passed to the GPU mapper. Ignored by other mappers. Maximum size of the 3D texture in GPU memory. Will default to the size computed from the graphics card. Can be adjusted by the user. Useful if the automatic detection is defective or missing.

Value passed to the GPU mapper. Ignored by other mappers. Maximum size of the 3D texture in GPU memory. Will default to the size computed from the graphics card. Can be adjusted by the user. Useful if the automatic detection is defective or missing.

virtual void vtkSmartVolumeMapper::SetMaxMemoryFraction ( float  ) [virtual]

Value passed to the GPU mapper. Ignored by other mappers. Maximum fraction of the MaxMemoryInBytes that should be used to hold the texture. Valid values are 0.1 to 1.0.

Value passed to the GPU mapper. Ignored by other mappers. Maximum fraction of the MaxMemoryInBytes that should be used to hold the texture. Valid values are 0.1 to 1.0.

virtual void vtkSmartVolumeMapper::SetInterpolationMode ( int  ) [virtual]

Set interpolation mode for downsampling (lowres GPU) (initial value: cubic).

Set interpolation mode for downsampling (lowres GPU) (initial value: cubic).

Set interpolation mode for downsampling (lowres GPU) (initial value: cubic).

Set interpolation mode for downsampling (lowres GPU) (initial value: cubic).

Set interpolation mode for downsampling (lowres GPU) (initial value: cubic).

void vtkSmartVolumeMapper::CreateCanonicalView ( vtkRenderer ren,
vtkVolume volume,
vtkVolume volume2,
vtkImageData image,
int  blend_mode,
double  viewDirection[3],
double  viewUp[3] 
)

This method can be used to render a representative view of the input data into the supplied image given the supplied blending mode, view direction, and view up vector.

void vtkSmartVolumeMapper::Render ( vtkRenderer ,
vtkVolume  
) [virtual]

WARNING: INTERNAL METHOD - NOT INTENDED FOR GENERAL USE Initialize rendering for this volume.

Implements vtkVolumeMapper.

WARNING: INTERNAL METHOD - NOT INTENDED FOR GENERAL USE Release any graphics resources that are being consumed by this mapper. The parameter window could be used to determine which graphic resources to release.

Reimplemented from vtkVolumeMapper.

Connect input of the vtkSmartVolumeMapper to the input of the internal volume mapper by doing a shallow to avoid memory leaks.

Precondition:
m_exists: m!=0

Connect input of the vtkSmartVolumeMapper to the input of the internal resample filter by doing a shallow to avoid memory leaks.

Precondition:
m_exists: f!=0
void vtkSmartVolumeMapper::Initialize ( vtkRenderer ren,
vtkVolume vol 
) [protected]
void vtkSmartVolumeMapper::ComputeRenderMode ( vtkRenderer ren,
vtkVolume vol 
) [protected]

Create an object with Debug turned off, modified time initialized to zero, and reference counting on.

Reimplemented from vtkAlgorithm.

static int vtkSmartVolumeMapper::IsTypeOf ( const char *  name) [static]

Return 1 if this class type is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkVolumeMapper.

virtual int vtkSmartVolumeMapper::IsA ( const char *  name) [virtual]

Return 1 if this class is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkVolumeMapper.

Reimplemented from vtkVolumeMapper.

virtual vtkObjectBase* vtkSmartVolumeMapper::NewInstanceInternal ( ) const [protected, virtual]

Reimplemented from vtkVolumeMapper.

Reimplemented from vtkVolumeMapper.

void vtkSmartVolumeMapper::PrintSelf ( ostream &  os,
vtkIndent  indent 
) [virtual]

Methods invoked by print to print information about the object including superclasses. Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.

Reimplemented from vtkVolumeMapper.

virtual void vtkSmartVolumeMapper::SetFinalColorWindow ( float  ) [virtual]

Set the final color window. This controls the contrast of the image. The default value is 1.0. The Window can be negative (this causes a "negative" effect on the image) Although Window can be set to 0.0, any value less than 0.00001 and greater than or equal to 0.0 will be set to 0.00001, and any value greater than -0.00001 but less than or equal to 0.0 will be set to -0.00001. Initial value is 1.0.

Get the final color window. Initial value is 1.0.

virtual void vtkSmartVolumeMapper::SetFinalColorLevel ( float  ) [virtual]

Set the final color level. The level controls the brightness of the image. The final color window will be centered at the final color level, and together represent a linear remapping of color values. The default value for the level is 0.5.

Get the final color level.

Set the requested render mode. The default is vtkSmartVolumeMapper::DefaultRenderMode.

Set the requested render mode to vtkSmartVolumeMapper::DefaultRenderMode. This is the best option for an application that must adapt to different data types, hardware, and rendering parameters.

Set the requested render mode to vtkSmartVolumeMapper::RayCastRenderMode. This option will use software rendering exclusively. This is a good option if you know there is no hardware acceleration.

Get the requested render mode.

Set the rate at or above this render will be considered interactive. If the DesiredUpdateRate of the vtkRenderWindow that caused the Render falls at or above this rate, the render is considered interactive and the mapper may be adjusted (depending on the render mode). Initial value is 1.0.

Get the update rate at or above which this is considered an interactive render. Initial value is 1.0.

This will return the render mode used during the previous call to Render().

Value passed to the GPU mapper. Ignored by other mappers. Maximum size of the 3D texture in GPU memory. Will default to the size computed from the graphics card. Can be adjusted by the user. Useful if the automatic detection is defective or missing.

Value passed to the GPU mapper. Ignored by other mappers. Maximum size of the 3D texture in GPU memory. Will default to the size computed from the graphics card. Can be adjusted by the user. Useful if the automatic detection is defective or missing.

virtual void vtkSmartVolumeMapper::SetMaxMemoryFraction ( float  ) [virtual]

Value passed to the GPU mapper. Ignored by other mappers. Maximum fraction of the MaxMemoryInBytes that should be used to hold the texture. Valid values are 0.1 to 1.0.

Value passed to the GPU mapper. Ignored by other mappers. Maximum fraction of the MaxMemoryInBytes that should be used to hold the texture. Valid values are 0.1 to 1.0.

virtual void vtkSmartVolumeMapper::SetInterpolationMode ( int  ) [virtual]

Set interpolation mode for downsampling (lowres GPU) (initial value: cubic).

Set interpolation mode for downsampling (lowres GPU) (initial value: cubic).

Set interpolation mode for downsampling (lowres GPU) (initial value: cubic).

Set interpolation mode for downsampling (lowres GPU) (initial value: cubic).

Set interpolation mode for downsampling (lowres GPU) (initial value: cubic).

void vtkSmartVolumeMapper::CreateCanonicalView ( vtkRenderer ren,
vtkVolume volume,
vtkVolume volume2,
vtkImageData image,
int  blend_mode,
double  viewDirection[3],
double  viewUp[3] 
)

This method can be used to render a representative view of the input data into the supplied image given the supplied blending mode, view direction, and view up vector.

void vtkSmartVolumeMapper::Render ( vtkRenderer ,
vtkVolume  
) [virtual]

WARNING: INTERNAL METHOD - NOT INTENDED FOR GENERAL USE Initialize rendering for this volume.

Implements vtkVolumeMapper.

WARNING: INTERNAL METHOD - NOT INTENDED FOR GENERAL USE Release any graphics resources that are being consumed by this mapper. The parameter window could be used to determine which graphic resources to release.

Reimplemented from vtkVolumeMapper.

Connect input of the vtkSmartVolumeMapper to the input of the internal volume mapper by doing a shallow to avoid memory leaks.

Precondition:
m_exists: m!=0

Connect input of the vtkSmartVolumeMapper to the input of the internal resample filter by doing a shallow to avoid memory leaks.

Precondition:
m_exists: f!=0
void vtkSmartVolumeMapper::Initialize ( vtkRenderer ren,
vtkVolume vol 
) [protected]
void vtkSmartVolumeMapper::ComputeRenderMode ( vtkRenderer ren,
vtkVolume vol 
) [protected]

Member Data Documentation

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The documentation for this class was generated from the following files: