Thanks for the suggestions

Hardware gl seems to be fine, glxgears runs smoothly: 
$ glxinfo | grep -i direct

direct rendering: Yes

[download]
I'll follow up with more details soon, but I doubt volume of the data is the problem, it's quite modest by PDL standards, and when I'm using the "twiddle" mode to look-around an unchanging model there is no flicker. Previously I just had a mesh which seemed ok but when I used a filled sheet there is a noticeable flicker as the light sheet is draw over the dark background.

I might not need double-buffering exactly, but a GL equivalent that only draws once all the things to draw are queued.

In reply to Re^2: PDL double-buffering by bsb
in thread PDL double-buffering by bsb

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.