Re: fast scatter plots - advice sought

[Jaroslav Hajek]

On Mon, Jan 11, 2010 at 5:40 AM, Shai Ayal <address@hidden> wrote:
> On Sun, Jan 10, 2010 at 11:18 PM, Jaroslav Hajek <address@hidden> wrote:
>> 3. It seems that Gnuplot can accept a variable pointsize directly,
>> using "pointsize variable" and taking an extra column of data. So it
>> could be nice if we allowed "markersize" property of a line primitive
>> to be a vector.
>> I'd like to implement this extension, but I'm not sure how to do this
>> for the opengl backend. Any hints?
> Hint:
> in src/gl-render.{h,cc} you have to change the following functions:
> init_marker, draw_marker and all of the draw_XXX functions which call
> them.
> You will have to cancel the size argument to init_marker and use sz=1.
> In draw_marker, you have to add a size argument, and use glScale to
> scale the marker appropriately
> In all the draw_XXX functions calling them, you have to give
> draw_marker appropriate size.
>
> If you want, I can do this, but you'll have to send me the changeset
> implementing the rest of this change so I have something to test
> against.
>
> Shai
>

Thanks, Shai. I'll try and possibly query for further help.

-- 
RNDr. Jaroslav Hajek, PhD
computing expert & GNU Octave developer
Aeronautical Research and Test Institute (VZLU)
Prague, Czech Republic
url: www.highegg.matfyz.cz