SoVolumeShape Class Reference
[Nodes]

VolumeViz Abstract base class for slices, SoVolumeSkin, SoHeightFieldRender, and SoVolumeRender nodes. More...

#include <VolumeViz/nodes/SoVolumeShape.h>

Inheritance diagram for SoVolumeShape:
SoLdmShape SoShape SoNode SoFieldContainer SoBase SoRefCounter SoTypedObject SoSlice SoVolumeRender SoFenceSlice SoHeightFieldRender SoObliqueSlice SoOrthoSlice SoVolumeSkin ObliqueSliceBorder OrthoSliceBorder

List of all members.

Public Types

enum  Interpolation {
  NEAREST,
  LINEAR,
  TRILINEAR,
  MULTISAMPLE_12,
  CUBIC
}

Public Member Functions

virtual SoType getTypeId () const

Static Public Member Functions

static SoType getClassTypeId ()

Public Attributes

SoSFEnum interpolation

Deprecated



enum  Composition {
  MAX_INTENSITY = 0,
  MIN_INTENSITY,
  SUM_INTENSITY,
  ALPHA_BLENDING,
  COMPOSITION_LAST
}
SoDEPRECATED SoSFEnum composition

Detailed Description

VolumeViz Abstract base class for slices, SoVolumeSkin, SoHeightFieldRender, and SoVolumeRender nodes.

This class defines common properties for the SoOrthoSlice, SoObliqueSlice, SoFenceSlice, SoVolumeSkin, SoHeightFieldRender and SoVolumeRender nodes.

The interpolation field controls how the texture is interpolated.

The composition field is deprecated and should not be used. Instead specify the composition mode for volume rendering using the SoVolumeRender node.

SEE ALSO

SoObliqueSlice, SoOrthoSlice, SoFenceSlice, SoVolumeRender, SoVolumeSkin, SoHeightFieldRender


Member Enumeration Documentation

Composition mode.

Deprecated:

Deprecated since Open Inventor 9100
See SoVolumeRender::RenderMode enum.
Enumerator:
MAX_INTENSITY 

Max intensity.

MIN_INTENSITY 

Min intensity.

SUM_INTENSITY 

Sum intensity.

ALPHA_BLENDING 

Alpha blending (Default).

COMPOSITION_LAST 

Interpolation mode.

Used with interpolation field. Also used with interpolation field in volume geometry nodes, e.g. SoVolumeIndexedFaceSet::interpolation

Enumerator:
NEAREST 

OpenGL "nearest neighbor" interpolation.

LINEAR 

OpenGL linear interpolation (Default).

This implies bi-linear interpolation for 2D textures (e.g. SoOrthoSlice, SoObliqueSlice, SoVolumeSkin, SoFenceSlice) and tri-linear interpolation for 3D textures (SoVolumeRender, SoVolumeGeometry).

TRILINEAR 

Tri-linear interpolation for SoObliqueSlice.

Tri-linear interpolation is used when extracting the 2D texture that will be applied to the slice, providing better image quality. Same as LINEAR for other nodes.

NOTE: enumeration value available since Open Inventor 6.0

MULTISAMPLE_12 

Multi-sample interpolation for slice shapes.

Interpolates data values using 12 samples around the voxel. This provides much higher image quality and specifically avoids rendering artifacts due to bi-linear interpolation. Only supported for 2D texture shapes (e.g. SoOrthoSlice, SoObliqueSlice, SoVolumeSkin, SoFenceSlice). Same as LINEAR for other nodes.

NOTE: enumeration value available since Open Inventor 7.0

CUBIC 

Cubic interpolation.

This implies bi-cubic interpolation for 2D textures (e.g. SoOrthoSlice, SoObliqueSlice, SoVolumeSkin, SoFenceSlice) and tri-cubic interpolation for 3D textures (SoVolumeRender, SoVolumeGeometry). It gives smoother results, especially for volume rendering.

Linear interpolation Cubic interpolation
volume_linear.jpg
volume_tricubic.jpg
Warning:
Heavy GPU usage. Primarily useful for still image rendering.

It is recomended to use SoInteractiveComplexity node to switch bewteen LINEAR interpolation while moving and CUBIC interpolation for Still frame:

     SoInteractiveComplexity* icplx = new SoInteractiveComplexity;
     icplx->fieldSettings.set1Value( 0, "SoVolumeRender interpolation LINEAR CUBIC" );
     root->addChild(icplx);
NOTE: enumeration value available since Open Inventor 9.3


Member Function Documentation

static SoType SoVolumeShape::getClassTypeId (  )  [static]

Returns the type identifier for this class.

Reimplemented from SoLdmShape.

Reimplemented in ObliqueSliceBorder, OrthoSliceBorder, SoFenceSlice, SoHeightFieldRender, SoObliqueSlice, SoOrthoSlice, SoSlice, SoVolumeRender, and SoVolumeSkin.

virtual SoType SoVolumeShape::getTypeId (  )  const [virtual]

Returns the type identifier for this specific instance.

Reimplemented from SoLdmShape.

Reimplemented in ObliqueSliceBorder, OrthoSliceBorder, SoFenceSlice, SoHeightFieldRender, SoObliqueSlice, SoOrthoSlice, SoSlice, SoVolumeRender, and SoVolumeSkin.


Member Data Documentation

Specifies color composition mode.

Use enum Composition. Default is ALPHA_BLENDING.

ALPHA_BLENDING blends the R, G, and B components for each pixel based on the their alpha values.

SUM_INTENSITY draws the sum of the R, G, and B components for each pixel.

MAX_INTENSITY draws the maximum R, G, and B components for each pixel.

MIN_INTENSITY draws the minimum R, G, and B components for each pixel.

Note: In all modes, blending is done against the background color of the scene (or the object behind the volume). This means that, using MIN_INTENSITY for example, if the background color is black then 0,0,0 is already the minimum RGB value and the volume will not be visible. Generally when using MIN_INTENSITY the background color should be set to white (1,1,1) and when using MAX_INTENSITY or SUM_INTENSITY the background color should be set to black (0,0,0). To set the background color see the setBackgroundColor method of the appropriate RenderArea class, for example SoWinRenderArea on Windows.

NOTE: field available since Open Inventor 5.0.3

Deprecated:

Deprecated since Open Inventor 9100
See SoVolumeRender::renderMode field.

Interpolation mode.

Use enum SoVolumeShape::Interpolation. Default is LINEAR. NOTE: In most cases on modern graphics boards, indexed textures are used, so this refers to interpolation of volume data values.


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

Open Inventor Toolkit reference manual, generated on 12 Nov 2020
Copyright © Thermo Fisher Scientific All rights reserved.
http://www.openinventor.com/