vtkEncodedGradientShader Class Reference

#include <vtkEncodedGradientShader.h>

Inheritance diagram for vtkEncodedGradientShader:

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Collaboration diagram for vtkEncodedGradientShader:

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List of all members.


Detailed Description

Compute shading tables for encoded normals.

vtkEncodedGradientShader computes shading tables for encoded normals that indicates the amount of diffuse and specular illumination that is received from all light sources at a surface location with that normal. For diffuse illumination this is accurate, but for specular illumination it is approximate for perspective projections since the center view direction is always used as the view direction. Since the shading table is dependent on the volume (for the transformation that must be applied to the normals to put them into world coordinates) there is a shading table per volume. This is necessary because multiple volumes can share a volume mapper.

Definition at line 43 of file vtkEncodedGradientShader.h.


Public Types

typedef vtkObject Superclass

Public Member Functions

virtual const char * GetClassName ()
virtual int IsA (const char *type)
void PrintSelf (ostream &os, vtkIndent indent)
virtual void SetZeroNormalDiffuseIntensity (float)
virtual float GetZeroNormalDiffuseIntensity ()
virtual void SetZeroNormalSpecularIntensity (float)
virtual float GetZeroNormalSpecularIntensity ()
void UpdateShadingTable (vtkRenderer *ren, vtkVolume *vol, vtkEncodedGradientEstimator *gradest)
float * GetRedDiffuseShadingTable (vtkVolume *vol)
float * GetGreenDiffuseShadingTable (vtkVolume *vol)
float * GetBlueDiffuseShadingTable (vtkVolume *vol)
float * GetRedSpecularShadingTable (vtkVolume *vol)
float * GetGreenSpecularShadingTable (vtkVolume *vol)
float * GetBlueSpecularShadingTable (vtkVolume *vol)
virtual void SetActiveComponent (int)
virtual int GetActiveComponent ()

Static Public Member Functions

static vtkEncodedGradientShaderNew ()
static int IsTypeOf (const char *type)
static vtkEncodedGradientShaderSafeDownCast (vtkObject *o)

Protected Member Functions

 vtkEncodedGradientShader ()
 ~vtkEncodedGradientShader ()
void BuildShadingTable (int index, double lightDirection[3], double lightColor[3], double lightIntensity, double viewDirection[3], double material[4], int twoSided, vtkEncodedGradientEstimator *gradest, int updateFlag)

Protected Attributes

float * ShadingTable [VTK_MAX_SHADING_TABLES][6]
vtkVolumeShadingTableVolume [VTK_MAX_SHADING_TABLES]
int ShadingTableSize [VTK_MAX_SHADING_TABLES]
int ActiveComponent
float ZeroNormalDiffuseIntensity
float ZeroNormalSpecularIntensity

Member Typedef Documentation

Reimplemented from vtkObject.

Definition at line 47 of file vtkEncodedGradientShader.h.


Constructor & Destructor Documentation

vtkEncodedGradientShader::vtkEncodedGradientShader (  )  [protected]

vtkEncodedGradientShader::~vtkEncodedGradientShader (  )  [protected]


Member Function Documentation

static vtkEncodedGradientShader* vtkEncodedGradientShader::New (  )  [static]

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

Reimplemented from vtkObject.

virtual const char* vtkEncodedGradientShader::GetClassName (  )  [virtual]

Reimplemented from vtkObject.

static int vtkEncodedGradientShader::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 vtkTypeRevisionMacro found in vtkSetGet.h.

Reimplemented from vtkObject.

virtual int vtkEncodedGradientShader::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 vtkTypeRevisionMacro found in vtkSetGet.h.

Reimplemented from vtkObject.

static vtkEncodedGradientShader* vtkEncodedGradientShader::SafeDownCast ( vtkObject o  )  [static]

Reimplemented from vtkObject.

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

Print the vtkEncodedGradientShader

Reimplemented from vtkObject.

virtual void vtkEncodedGradientShader::SetZeroNormalDiffuseIntensity ( float   )  [virtual]

Set / Get the intensity diffuse / specular light used for the zero normals.

virtual float vtkEncodedGradientShader::GetZeroNormalDiffuseIntensity (  )  [virtual]

Set / Get the intensity diffuse / specular light used for the zero normals.

virtual void vtkEncodedGradientShader::SetZeroNormalSpecularIntensity ( float   )  [virtual]

Set / Get the intensity diffuse / specular light used for the zero normals.

virtual float vtkEncodedGradientShader::GetZeroNormalSpecularIntensity (  )  [virtual]

Set / Get the intensity diffuse / specular light used for the zero normals.

void vtkEncodedGradientShader::UpdateShadingTable ( vtkRenderer ren,
vtkVolume vol,
vtkEncodedGradientEstimator gradest 
)

Cause the shading table to be updated

float* vtkEncodedGradientShader::GetRedDiffuseShadingTable ( vtkVolume vol  ) 

Get the red/green/blue shading table.

float* vtkEncodedGradientShader::GetGreenDiffuseShadingTable ( vtkVolume vol  ) 

Get the red/green/blue shading table.

float* vtkEncodedGradientShader::GetBlueDiffuseShadingTable ( vtkVolume vol  ) 

Get the red/green/blue shading table.

float* vtkEncodedGradientShader::GetRedSpecularShadingTable ( vtkVolume vol  ) 

Get the red/green/blue shading table.

float* vtkEncodedGradientShader::GetGreenSpecularShadingTable ( vtkVolume vol  ) 

Get the red/green/blue shading table.

float* vtkEncodedGradientShader::GetBlueSpecularShadingTable ( vtkVolume vol  ) 

Get the red/green/blue shading table.

virtual void vtkEncodedGradientShader::SetActiveComponent ( int   )  [virtual]

Set the active component for shading. This component's ambient / diffuse / specular / specular power values will be used to create the shading table. The default is 1.0

virtual int vtkEncodedGradientShader::GetActiveComponent (  )  [virtual]

Set the active component for shading. This component's ambient / diffuse / specular / specular power values will be used to create the shading table. The default is 1.0

void vtkEncodedGradientShader::BuildShadingTable ( int  index,
double  lightDirection[3],
double  lightColor[3],
double  lightIntensity,
double  viewDirection[3],
double  material[4],
int  twoSided,
vtkEncodedGradientEstimator gradest,
int  updateFlag 
) [protected]

Build a shading table for a light with the specified direction, and color for an object of the specified material properties. material[0] = ambient, material[1] = diffuse, material[2] = specular and material[3] = specular exponent. If the ambient flag is 1, then ambient illumination is added. If not, then this means we are calculating the "other side" of two sided lighting, so no ambient intensity is added in. If the update flag is 0, the shading table is overwritten with these new shading values. If the updateFlag is 1, then the computed light contribution is added to the current shading table values. There is one shading table per volume, and the index value indicated which index table should be used. It is computed in the UpdateShadingTable method.


Member Data Documentation

float* vtkEncodedGradientShader::ShadingTable[VTK_MAX_SHADING_TABLES][6] [protected]

Definition at line 118 of file vtkEncodedGradientShader.h.

vtkVolume* vtkEncodedGradientShader::ShadingTableVolume[VTK_MAX_SHADING_TABLES] [protected]

Definition at line 119 of file vtkEncodedGradientShader.h.

int vtkEncodedGradientShader::ShadingTableSize[VTK_MAX_SHADING_TABLES] [protected]

Definition at line 120 of file vtkEncodedGradientShader.h.

Definition at line 122 of file vtkEncodedGradientShader.h.

Definition at line 126 of file vtkEncodedGradientShader.h.

Definition at line 127 of file vtkEncodedGradientShader.h.


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

Generated on Sat Dec 27 13:23:28 2008 for VTK by  doxygen 1.5.6