VolumeViz/vvizGetData_frag.h File Reference

This file contains method to redifing when using the GET_DATA_FUNCTION slot. More...

Defines
#define	VVizDefaultData VVIZ_DATATYPE(0.0)
Functions
VVIZ_DATATYPE	VVizGetData (in VVizDataSetId dataset, in vec3 dataCoord)
VVIZ_DATATYPE	VVizGetRawData (in VVizDataSetId dataset, in vec3 dataCoord)

Detailed Description

This file contains method to redifing when using the GET_DATA_FUNCTION slot.

Definition in file vvizGetData_frag.h.

Define Documentation

#define VVizDefaultData VVIZ_DATATYPE(0.0)

Default voxel value returned by VolumeViz shaders when no data is available.

Function Documentation

VVIZ_DATATYPE VVizGetData	(	in VVizDataSetId	dataset,
		in vec3	dataCoord
	)

SoVolumeShader::GET_DATA_FUNCTION function.

Applications can replace this method to customize the SoVolumeShader::GET_DATA_FUNCTION shader stage.

NOTE: On the GPU, voxel values are always returned as a normalized value in the range 0..1. If the actual voxel value is needed, the shader function must compute that value using the current data range (see SoDataRange). The application must explicitly pass the current data range to the shader function as a uniform parameter.

Parameters:

	dataset	The dataset to read
	dataCoord	Uniform data coordinates in volume space.

Returns:: voxel data value.

VVIZ_DATATYPE VVizGetRawData	(	in VVizDataSetId	dataset,
		in vec3	dataCoord
	)

Default SoVolumeShader::GET_DATA_FUNCTION function.

Method to access dataset, that can be used by VVizGetData custom implementation. It may apply different interpolation (linear, cubix, trilinear, multi-sample12) depending on SoVolumeRenderingQuality and SoVolumeRender nodes setup.