Coin Logo Coin3D is Free Software,
published under the BSD 3-clause license. 		https://bitbucket.org/Coin3D/
http://www.kongsberg.com/kogt/
Public Types | Static Public Member Functions | Public Attributes | Protected Member Functions | Friends | List of all members
SoObliqueSlice Class Reference

Render a slice of the volume data, with any orientation. More...

#include <VolumeViz/nodes/SoObliqueSlice.h>

Inherits SoShape.

Public Types

enum  Interpolation { NEAREST, LINEAR }
 
enum  AlphaUse { ALPHA_AS_IS, ALPHA_OPAQUE, ALPHA_BINARY }
 

Static Public Member Functions

static void initClass (void)
 

Public Attributes

SoSFPlane plane
 
SoSFEnum interpolation
 
SoSFEnum alphaUse
 
SoSFNode alternateRep
 

Protected Member Functions

virtual void GLRender (SoGLRenderAction *action)
 
virtual void rayPick (SoRayPickAction *action)
 
virtual void generatePrimitives (SoAction *action)
 
virtual void computeBBox (SoAction *action, SbBox3f &box, SbVec3f &center)
 
virtual void write (SoWriteAction *action)
 
virtual SbBool readInstance (SoInput *in, unsigned short flags)
 

Friends

class SoObliqueSliceP
 

Detailed Description

Render a slice of the volume data, with any orientation.

Insert a node of this type after an SoVolumeData node in the scene graph to render a single slice from the full volume data set. The slice is specified as a plane with an orientation and position within the volume.

Here is a simple example, in the form of an iv-file:

#Inventor V2.1 ascii

SoVolumeData { fileName "ENGINE.VOL" }
 
Separator {
  SoTransferFunction { }  
  DEF clipper ClipPlaneManip { }
  SoVolumeRender { }   
}

Separator {
  SoTransferFunction { predefColorMap GLOW }  
  SoObliqueSlice {
    interpolation LINEAR        
    alphaUse ALPHA_AS_IS
    plane = USE clipper . plane
  }
}

Please note that SoObliqueSlice will not work with older OpenGL drivers as they usually lack 3D-texture support. OpenGL drivers of version 1.2 and onwards supports 3D-texturing, as does older OpenGL drivers with the GL_EXT_texture3D extension. If none of these are available, a warning message will be printed using Coin's SoDebugError::postWarning().

See also
SoVolumeRender, SoOrthoSlice
SoVolumeTriangleStripSet, SoVolumeIndexedTriangleStripSet,
SoVolumeIndexedFaceSet, SoVolumeFaceSet
Since
SIM Voleon 2.0

Member Enumeration Documentation

◆ Interpolation

enum SoObliqueSlice::Interpolation

Enumeration of available types of voxel colors interpolation.

Enumerator
NEAREST 

For "in between" pixels of the screen rasterization, pick the color of the nearest voxel. Will give sharp edges and a distinct blocky look.

LINEAR 

For "in between" pixels of the screen rasterization, interpolate by averaging the colors of several of the nearest voxels. Will give a smoother appearance, but sacrifies some "correctness" for appearance.

◆ AlphaUse

enum SoObliqueSlice::AlphaUse
Enumerator
ALPHA_AS_IS 

The alpha channel is rendered 'as-is'.

ALPHA_OPAQUE 

The alpha channel is ignored making the slice opaque.

ALPHA_BINARY 

All alpha values not equal to 0 is threated as value 1.0f.

Member Data Documentation

◆ plane

SoSFPlane SoObliqueSlice::plane

The plane defining the slice.

Default value is an XY plane.

◆ interpolation

SoSFEnum SoObliqueSlice::interpolation

How to interpolate color values when rendering "in between" voxels. See SoObliqueSlice::Interpolation.

Default value is SoObliqueSlice::LINEAR.

◆ alphaUse

SoSFEnum SoObliqueSlice::alphaUse

How the alpha channel should be threated during rendering. See SoObliqueSlice::AlphaUse.

Default value is SoObliqueSlice::ALPHA_AS_IS

◆ alternateRep

SoSFNode SoObliqueSlice::alternateRep

NOTE: support for this field not yet implemented in SIM Voleon.

Since
SIM Voleon 2.0
The documentation for this class was generated from the following files: