Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.c > #15211

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

Show all headers | View raw

James Kuyper <jameskuyper@verizon.net> writes:
> On 12/29/2011 02:03 PM, someone wrote:
>> On Dec 29, 6:34 pm, j...@toerring.de (Jens Thoms Toerring) wrote:
>>> someone <newsbo...@gmail.com> wrote:
[...]
>>>> void setBezierPoint(const double &x, const double &y, const double &z,
>>>>                     GLfloat bezierCTRpts[][3]) // 4th input is GONE !
>>>> {
[...]
>>>> }
>
> There's really no reason for using C++ references here. You're not
> changing the thing they refer to. C++ references are just syntactic
> sugar for something that could also be done in ordinary C using pointers
> (don't get me wrong - I like some kinds of syntactic sugar, and C++
> references can be useful). By using a reference, you avoid a copy, but
> impose the cost of dereferencing the pointer - it's pretty much a wash,
> unless the parameter has a big complicated type - which isn't the case
> for double.

And in this case, it doesn't make much sense to use a reference even in
C++.  You're passing the argument by reference, byt the "const" means
the function can't use the reference to modify the argument anyway.

In either C or C++, you might as well define the function as:

void setBezierPoint(double x, double y, double z,
                    GLfloat bezierCTRpts[][3])
{
[...]
}

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
    Will write code for food.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"

Back to comp.lang.c | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

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

csiph-web