Hi Robert,
I would like to know how to generate colour map. Except rgb, the alpha is
very important, so each colour I would like to use much alpha.
If there is 1 colour, I can do like this.
osg::TransferFunction1D::ColorMap colorMap;
for (int i=0; i<255; i++)
colorMap[i] = osg::Vec4((float)r/255, (float)g/255,
(float)b/255, (float)i/255);
If the colour are more than 10, what the colour map looks like?
Currently, I am using osgVolume without created colour map, but I believe
there is somewhere defined the colour map. Do you know where I can find the
code? Thanks again.
Regards,
Clement
________________________________________
From: osg-users-boun...@lists.openscenegraph.org
[osg-users-boun...@lists.openscenegraph.org] On Behalf Of Robert Osfield
[robert.osfi...@gmail.com]
Sent: Monday, 14 May 2012 9:07 PM
To: OpenSceneGraph Users
Subject: Re: [osg-users] osgvolume brightness and sample density
Hi Clement,
On 8 May 2012 08:44, <clement....@csiro.au> wrote:
> Thanks for your help. The colour map in the osgvolume.cpp example contains
> specific colour. I would like to implement full range of colours as possible
> supported by osg. Any idea what I can do to create a colour map of full
> range colours. Thanks.
I don't know what you actually mean by "a colour map of full range
colours", so can't answer your question. What are you intending here,
to map the intensity values from the 3d image data to a specific
colour, which is what the TransferFunction1D is for, or from colour to
colour which is rather more open ended.
Robert.
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