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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