Data structures and constant
[VolumeViz Shader API]
VolumeViz GLSL shaders data structures and constants.
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Classes | |
| struct | VVizVoxelInfo |
| Defines voxel state info used with the VolumeViz Shader Library API. More... | |
Defines | |
| #define | VVizDefaultData VVIZ_DATATYPE(0.0) |
| #define | VVizTileInfo vec4 |
Functions | |
| vec3 | VVizGetVolumeDimensions (in VVizDataSetId dataset) |
| vec3 | VVizGetTileDimensions (in VVizDataSetId dataset) |
| vec3 | VVizGetVoxelDimensions (in VVizDataSetId dataset) |
| int | VVizGetTileResolution (in VVizTileInfo tileInfo) |
| VVizTileInfo | VVizGetTileInfo (in VVizDataSetId dataset, in vec3 dataCoord) |
| void | VVizGetTileIJKBox (in VVizDataSetId dataset, in vec3 dataCoord, out vec3 tileIJKMin, out vec3 tileIJKMax) |
Detailed Description
VolumeViz GLSL shaders data structures and constants.
The following pre-processing directives are dynamically added to the shader pipeline and can be used by application defined shader functions.
- VVIZ_DATARGBA : Is true if VVizData (VolumeViz input data) contains RGBA values.
In this case each value in VVizData is a vec4. Otherwise each value is a float.
(Before Open Inventor 8.5 only float values were supported.)
- VVIZ_DATATYPE : A string defining the GLSL data type in the volume (VVizData).
If VVIZ_DATARGBA is true, then VVIZ_DATATYPE is defined as "vec4", in all other cases it is defined as "float".
(Before Open Inventor 8.5 only type float was supported.)
- VVIZ_NUM_CLIPPING_PLANES : Defines the current numbers of GL clipping planes to take in account.
- VVIZ_SHAPE_TYPE : Define the shape that is currently rendered.
It can be usefull to specialize shader behavior depending on dhape type. It can be VVIZ_VRENDER, VVIZ_SLICE, VVIZ_OBLSLICE, VVIZ_VGEOM, VVIZ_VSKIN or VVIZ_HEIGHTFIELD.
Define Documentation
| #define VVizDefaultData VVIZ_DATATYPE(0.0) |
Default voxel value returned by VolumeViz shaders when no data is available.
| #define VVizTileInfo vec4 |
Defines internal VolumeViz tile info data storage.
See VVizGetTileResolution, VVizGetTileInfo
Function Documentation
| vec3 VVizGetTileDimensions | ( | in VVizDataSetId | dataset | ) |
Returns volume dataset tile dimensions in voxels.
- Parameters:
-
dataset The dataset to retrieve information from.
- Returns:
- dataset Tile dimension.
| void VVizGetTileIJKBox | ( | in VVizDataSetId | dataset, | |
| in vec3 | dataCoord, | |||
| out vec3 | tileIJKMin, | |||
| out vec3 | tileIJKMax | |||
| ) |
Returns VolumeViz tile IJK box info for a specified voxel.
- Parameters:
-
dataset The dataset to which the tileinfo belongs. dataCoord Uniform data coordinates in volume space. tileIJKMin ijk min of the tile in voxels. tileIJKMax ijk max of the tile in voxels.
| VVizTileInfo VVizGetTileInfo | ( | in VVizDataSetId | dataset, | |
| in vec3 | dataCoord | |||
| ) |
Returns VolumeViz tile info for a specified voxel.
- Parameters:
-
dataset The dataset to retrieve information from. dataCoord Uniform data coordinates in volume space.
- Returns:
- The tileInfo of the voxel at position dataCoord.
| int VVizGetTileResolution | ( | in VVizTileInfo | tileInfo | ) |
Returns VolumeViz tile resolution info.
- Parameters:
-
tileInfo The tileInfo to retrieve information from.
- Returns:
- The LDM resolution level of this tile (zero is full resolution).
| vec3 VVizGetVolumeDimensions | ( | in VVizDataSetId | dataset | ) |
Returns volume dimensions of a dataset in voxels.
- Parameters:
-
dataset The dataset to retrieve information from.
- Returns:
- dataset Dimension.
| vec3 VVizGetVoxelDimensions | ( | in VVizDataSetId | dataset | ) |
Returns volume dataset uniform voxel dimensions.
- Parameters:
-
dataset The dataset to retrieve information from.
- Returns:
- dataset Voxel uniform dimension.