cls_Texture3D

Texture3D(parent, data, renderStyle='mip')

Inherits from BaseTexture.

A data type that represents structured data in three dimensions (a volume).

If the drawing hangs, your video drived decided to render in software mode. This is unfortunately (as far as I know) not possible to detect programatically. It might help if your data is shaped a power of 2. The mip renderer is the 'easiest' for most systems to render.

Texture3D objects can be created with the function vv.volshow().

The Texture3D class implements the following properties:
isoThreshold, renderStyle

Properties

Texture3D.isoThreshold

Get/Set the isothreshold value used in the iso renderer.

Texture3D.renderStyle

Get/Set the render style to render the volumetric data: * MIP: maximum intensity projection. Shows the voxel with the maxiumum value. * ISO: isosurface rendering. Casts ray until value is above threshold. Ligthing is calculated at that voxel. Use together with isoThreshold property. * RAY: ray casting. All voxels along the ray contribute to final color, weighted by the alpha value. * EDGERAY: ray casting in which alpha is scaled with the gradient magnitude. * LITRAY: ray casting in which all voxels are lit. Most pretty and most demanding for GPU.

Notes

MIP and EDGERAY usually work out of the box. ISO requires playing with the isoThreshold property. RAY and LITRAY require playing with the alpha channel using the ColormapEditor wibject.

If drawing takes really long, your system renders in software mode. Try rendering data that is shaped with a power of two. This helps on some cards.

You can also create your own render style by modyfying the GLSL code. See core/shaders_src.py and the ShaderCode class for more info.