Ok, got it,
THanks Carsten~~
2009/8/11 Carsten Neumann <[email protected]>
> Hello Jie Liu,
>
> Jie Liu wrote:
> > The only problem is that the sample rate seems very low by default, so
> > the shape of objects is not smooth.
> > How can I increase the sample rate? I do not find the function through
> > the manual.
>
> you can change that with DVRVolume::sampling()
> In the example/test testSimpleVolumeNodeRenderer you can change the
> sampling with the a/z keys (the program needs to be run from the
> directory Source/System/NodeCores/Drawables/VolRen so that it can find
> the volume data 00_data64x64x64.{dat,raw} or with one of the parameters
> RGB, RGBA, LA, L to generate data on the fly).
>
> > BTW, is the DVR in OpenSG a CPU-based algorithm or GPU-based ray casting
> > algorithm?
>
> it is CPU based; it was developed at about the time assembler shaders
> just became available.
>
> Cheers,
> Carsten
>
>
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--
Jie Liu
Visualization Research Group
Center for Information Science, School of EECS,
Room 2104, Science Building No.2,
Peking University, Beijing 100871, China
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