visvis
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almarklein
Line class (wobject) for which the color can be specified for each point.
For each point, the value can be specified, similar as for the Mesh class.
If this is a scalar value, the point's color will be looked up in a colormap.
If this is a 3D or 4D value, this specified RGB/RGBA directly. The mesh class
also supports 2D values, which are then looked up in a texture. I'm not sure
whether that would make sense for points in a 3D space though...
Original issue reported on code.google.com by [email protected] on 28 Mar 2011 at 10:24
Hi Almar,
I have need for colormapped set of points in visvis. Up until now I have been
looping through each discrete value range and plotting each set of points as
the appropriate color from the colormap, but this approach is very slow. Where
in the visvis code would you recommend I start looking to implement this
functionality in a more optimized fashion?
Thanks,
Alex
Original comment by [email protected] on 23 Aug 2013 at 3:23
In core/line.py
However, I think that with the current implementation of the Line class this is
not really possible, as it uses the fixed function pipeline.
My advice would be to create a completely new line class yourself that uses
shaders so you can control the color per vertex.
It may be that visvis' Line class will be based on vispy someday, in which case
stuff like this should definitely be possible.
Original comment by [email protected] on 26 Aug 2013 at 8:55
Does anyone know if its possible to add color information directly to a
pointSet? I have color point cloud that I think it would be to tedious to color
each point at a time via the plot function.
Original comment by [email protected] on 9 Sep 2014 at 3:03
No, this is not supported in visvis, sorry. If you don't mind working with
bleeding edge software, in vispy (http://vispy.org) we have a Line object that
I think can do what you need (and if it does not, we are eager to support your
use-case).
Original comment by [email protected] on 9 Sep 2014 at 7:06
Visvis is in low maintenance mode. This feature won't be supported.
Have a look at PyGfx, where it is supported, see e.g. this example
