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Re: passing static 2D array to function - not fully working like I hoped for...

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"Jens Thoms Toerring" <jt@toerring.de> wrote in message 
news:9m3ttuFb3eU1@mid.uni-berlin.de...
> someone <newsboost@gmail.com> wrote:


>> Of some reason, floats seem to be widely used with opengl...
>
> Probably because the results don't need a high precision (does
> it matter if a pixel is shown at position 231.122387267423 or
> 231.122387267424?)

When it finally gets to the screen, it doesn't matter. But it might well do 
long before that.

Single precision only gives an accuracy of about 1 in 8 million; if the 
model you're trying to display uses vertices relative to some distant point 
(for example, one particular location in a country), then there could be 
obvious errors in the endpoints of the lines you're trying to draw.

Single precision can still be used, if that is all that is available, but 
might require some extra ingenuity to use with some kinds of model.

-- 
Bartc 

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passing static 2D array to function - not fully working like I hoped for... someone <newsboost@gmail.com> - 2011-12-29 09:11 -0800
  Re: passing static 2D array to function - not fully working like I hoped for... Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-12-29 17:27 +0000
    Re: passing static 2D array to function - not fully working like I hoped for... someone <newsboost@gmail.com> - 2011-12-29 10:55 -0800
  Re: passing static 2D array to function - not fully working like I hoped for... jt@toerring.de (Jens Thoms Toerring) - 2011-12-29 17:34 +0000
    Re: passing static 2D array to function - not fully working like I hoped for... someone <newsboost@gmail.com> - 2011-12-29 11:03 -0800
      Re: passing static 2D array to function - not fully working like I hoped for... jt@toerring.de (Jens Thoms Toerring) - 2011-12-29 19:38 +0000
        Re: passing static 2D array to function - not fully working like I hoped for... "BartC" <bc@freeuk.com> - 2011-12-29 23:19 +0000
          Re: passing static 2D array to function - not fully working like I hoped for... "BartC" <bc@freeuk.com> - 2011-12-31 11:29 +0000
        Re: passing static 2D array to function - not fully working like I hoped for... 88888 Dihedral <dihedral88888@googlemail.com> - 2011-12-29 17:26 -0800
      Re: passing static 2D array to function - not fully working like I hoped for... Keith Thompson <kst-u@mib.org> - 2011-12-29 11:58 -0800
        Re: passing static 2D array to function - not fully working like I hoped for... Tim Rentsch <txr@alumni.caltech.edu> - 2012-01-25 17:45 -0800
          Re: passing static 2D array to function - not fully working like I hoped for... Kaz Kylheku <kaz@kylheku.com> - 2012-01-26 02:08 +0000
      Re: passing static 2D array to function - not fully working like I hoped for... James Kuyper <jameskuyper@verizon.net> - 2011-12-29 15:35 -0500
        Re: passing static 2D array to function - not fully working like I hoped for... Keith Thompson <kst-u@mib.org> - 2011-12-29 13:25 -0800
          Re: passing static 2D array to function - not fully working like I hoped for... "io_x" <a@b.c.invalid> - 2011-12-31 16:32 +0100
            Re: passing static 2D array to function - not fully working like I hoped for... 88888 Dihedral <dihedral88888@googlemail.com> - 2011-12-31 15:10 -0800
              Re: passing static 2D array to function - not fully working like I hoped for... "osmium" <r124c4u102@comcast.net> - 2011-12-31 18:03 -0600
      Re: passing static 2D array to function - not fully working like I hoped for... Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-12-29 20:37 +0000
        Re: passing static 2D array to function - not fully working like I hoped for... jgk@panix.com (Joe keane) - 2012-01-03 15:48 +0000
          Re: passing static 2D array to function - not fully working like I hoped for... Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-01-03 16:47 +0000
          Re: passing static 2D array to function - not fully working like I hoped for... Phil Carmody <thefatphil_demunged@yahoo.co.uk> - 2012-01-05 22:31 +0200
      Re: passing static 2D array to function - not fully working like I hoped for... Nobody <nobody@nowhere.com> - 2011-12-31 09:23 +0000
        Re: passing static 2D array to function - not fully working like I hoped for... Keith Thompson <kst-u@mib.org> - 2011-12-31 11:04 -0800
          Re: passing static 2D array to function - not fully working like I hoped for... Nobody <nobody@nowhere.com> - 2012-01-01 08:20 +0000
  Re: passing static 2D array to function - not fully working like I hoped for... Barry Schwarz <schwarzb@dqel.com> - 2011-12-29 09:49 -0800
    Re: passing static 2D array to function - not fully working like I hoped for... someone <newsboost@gmail.com> - 2011-12-29 11:13 -0800
      Re: passing static 2D array to function - not fully working like I hoped for... Seebs <usenet-nospam@seebs.net> - 2011-12-29 19:22 +0000
        Re: passing static 2D array to function - not fully working like I hoped for... someone <newsboost@gmail.com> - 2011-12-29 13:29 -0800
          Re: passing static 2D array to function - not fully working like I hoped for... Seebs <usenet-nospam@seebs.net> - 2011-12-29 21:42 +0000
            Re: passing static 2D array to function - not fully working like I hoped for... someone <newsboost@gmail.com> - 2011-12-29 15:28 -0800
          Re: passing static 2D array to function - not fully working like I hoped for... Keith Thompson <kst-u@mib.org> - 2011-12-29 14:46 -0800
        Re: passing static 2D array to function - not fully working like I hoped for... James Kuyper <jameskuyper@verizon.net> - 2011-12-29 18:29 -0500
          Re: passing static 2D array to function - not fully working like I hoped for... Seebs <usenet-nospam@seebs.net> - 2011-12-30 00:03 +0000
            Re: passing static 2D array to function - not fully working like I hoped for... James Kuyper <jameskuyper@verizon.net> - 2011-12-29 21:30 -0500
        Re: passing static 2D array to function - not fully working like I hoped for... Tim Rentsch <txr@alumni.caltech.edu> - 2012-01-25 17:47 -0800
  Re: passing static 2D array to function - not fully working like I hoped for... Tim Rentsch <txr@alumni.caltech.edu> - 2012-01-25 17:39 -0800

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