e****r
发帖数: 166 | 1 which use renderman to render volumetric scientific dataset, it's fun,
now you can play with renderman shading language on your dataset,
and renderman SL is very powerful, so.....:O), there is still a lot
need to improve though. | l**p
发帖数: 474 | 2 Do you have any rendered image we can see?
【在 e****r 的大作中提到】
: which use renderman to render volumetric scientific dataset, it's fun,
: now you can play with renderman shading language on your dataset,
: and renderman SL is very powerful, so.....:O), there is still a lot
: need to improve though.
| e****r
发帖数: 166 | 3 just uploaded to yahoo photo:
http://photos.yahoo.com/bc/zhangxiao1974/lst?.dir=/renderman_volume&.view=t
some introduction:
Goal:
The mainly goal of this project is to explore the method to render
large amount of scientific volume data by using renderman shading
language.
Basic Strategy is Ray trace in SL, sample in C/C++ shadeop, it's
useful for adding lighting to the volume,the SL gets and adds the
lighting contribution for each step along the ray, since shadeop
don't know the global informa
【在 l**p 的大作中提到】
: Do you have any rendered image we can see?
| l**p
发帖数: 474 | 4 they are very pleasing.
And how did you get the transfer functions?
【在 e****r 的大作中提到】
: just uploaded to yahoo photo:
: http://photos.yahoo.com/bc/zhangxiao1974/lst?.dir=/renderman_volume&.view=t
: some introduction:
: Goal:
: The mainly goal of this project is to explore the method to render
: large amount of scientific volume data by using renderman shading
: language.
: Basic Strategy is Ray trace in SL, sample in C/C++ shadeop, it's
: useful for adding lighting to the volume,the SL gets and adds the
: lighting contribution for each step along the ray, since shadeop
| e****r
发帖数: 166 | 5 thanks.
transfer functions? you mean the shadeop sampling function or
the color mapping?
【在 l**p 的大作中提到】
: they are very pleasing.
: And how did you get the transfer functions?
| l**p
发帖数: 474 | 6 The color mapping...
Map the orignial data to RGBA...
【在 e****r 的大作中提到】
: thanks.
: transfer functions? you mean the shadeop sampling function or
: the color mapping?
| e****r
发帖数: 166 | 7 it's very straight foward now, i made a gradiant color image(can be any kind
of gradiant), make it as a texture map in renderman, then access the s(t)
texture coordinates with thedensity value, with some linear scale factor.
like i said in the introduction, it's a fairly simple mapping, of course
if you understand the dataset very well, you should be able to map special
data to special color in the colormap very easily.
【在 l**p 的大作中提到】
: The color mapping...
: Map the orignial data to RGBA...
| l**p
发帖数: 474 | 8 我现在在找一些更好的mapping方法。
【在 e****r 的大作中提到】
: it's very straight foward now, i made a gradiant color image(can be any kind
: of gradiant), make it as a texture map in renderman, then access the s(t)
: texture coordinates with thedensity value, with some linear scale factor.
: like i said in the introduction, it's a fairly simple mapping, of course
: if you understand the dataset very well, you should be able to map special
: data to special color in the colormap very easily.
| z*l
发帖数: 763 | 9 Read Gordon Kindlmann's master thesis, he won the transfer function
cmpetition.
【在 l**p 的大作中提到】
: 我现在在找一些更好的mapping方法。
| l**p
发帖数: 474 | 10 I knew his paper.
But I am looking for more than just using higher order diretatives
【在 z*l 的大作中提到】
: Read Gordon Kindlmann's master thesis, he won the transfer function
: cmpetition.
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