Re: Probably UB but I am finding it hard to give a fuck (C++ swizzle)

From	"Chris M. Thomasson" <chris.m.thomasson.1@gmail.com>
Newsgroups	comp.lang.c++
Subject	Re: Probably UB but I am finding it hard to give a fuck (C++ swizzle)
Date	2020-01-31 23:00 -0800
Organization	Aioe.org NNTP Server
Message-ID	<r137m0$k63$1@gioia.aioe.org> (permalink)
References	<cYwKF.3051$vj3.487@fx10.dcg> <qteda4$1vi2$1@gioia.aioe.org> <9EEKF.6570$RQ.608@fx09.dcg> <qu73rr$13d7$1@gioia.aioe.org> <8UKNF.20704$vj3.9587@fx10.dcg>

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On 12/28/2019 7:53 AM, Mr Flibble wrote:
> On 28/12/2019 08:30, Chris M. Thomasson wrote:
>> On 12/18/2019 10:19 PM, Mr Flibble wrote:
>>> On 18/12/2019 23:38, Chris M. Thomasson wrote:
>>>> On 12/18/2019 1:34 PM, Mr Flibble wrote:
>>>>> Hi!
>>>>>
>>>>> The following is the base class of my vector class (the 
>>>>> mathematical vector not the container) so I can do things like:
>>>>>
>>>>> vec3 v1 = { 1.0, 2.0, 3.0 };
>>>>> vec2 v2 = v1.xy;
>>>>> double z = v1.z;
>>>>> vec4 v3 = v1.xyzz;
>>>>>
>>>>> So we have an anonymous union of an anonymous struct and some 
>>>>> swizzles and I suspect it is full of UB but I am finding it hard to 
>>>>> care as I cannot see any other way of doing this.
>>>>>
>>>>> Collective thoughts/wisdom?
>>>> [...]
>>>>
>>>> Are you trying to get close to GLSL? The glm lib for C++ is very 
>>>> close, but its does not have the .xyz type of functionality. 
>>>> Interesting.
>>>>
>>>> vec4 v4 = vec4(v3.xyz, 1.0);
>>>>
>>>> v4 now equals { v3.x, v3.y, v3.z, 1.0 }
>>>
>>> That is the goal, yes.
>>
>> Looking forward to using C++ with swizzles, using your work, to render 
>> something like the following experiment of mine:
>>
>> https://youtu.be/TLd64a4gdZQ
> 
> Probably best waiting until I get SIMD specializations working.

No problem. Keep up the great work.

Thread

Probably UB but I am finding it hard to give a fuck (C++ swizzle) Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2019-12-18 21:34 +0000
  Re: Probably UB but I am finding it hard to give a fuck (C++ swizzle) Öö Tiib <ootiib@hot.ee> - 2019-12-18 14:24 -0800
    Re: Probably UB but I am finding it hard to give a fuck (C++ swizzle) Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2019-12-18 23:14 +0000
      Re: Probably UB but I am finding it hard to give a fuck (C++ swizzle) Öö Tiib <ootiib@hot.ee> - 2019-12-18 15:36 -0800
        Re: Probably UB but I am finding it hard to give a fuck (C++ swizzle) Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2019-12-19 06:18 +0000
      Re: Probably UB but I am finding it hard to give a fuck (C++ swizzle) "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2019-12-19 10:49 +0100
      Re: Probably UB but I am finding it hard to give a fuck (C++ swizzle) Manfred <noname@add.invalid> - 2019-12-19 14:29 +0100
  Re: Probably UB but I am finding it hard to give a fuck (C++ swizzle) "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2019-12-18 15:38 -0800
    Re: Probably UB but I am finding it hard to give a fuck (C++ swizzle) Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2019-12-19 06:19 +0000
      Re: Probably UB but I am finding it hard to give a fuck (C++ swizzle) "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2019-12-23 10:34 -0800
      Re: Probably UB but I am finding it hard to give a fuck (C++ swizzle) "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2019-12-28 00:30 -0800
        Re: Probably UB but I am finding it hard to give a fuck (C++ swizzle) Mr Flibble <flibble@i42.removethisbit.co.uk> - 2019-12-28 15:53 +0000
          Re: Probably UB but I am finding it hard to give a fuck (C++ swizzle) "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2020-01-31 23:00 -0800
  Re: Probably UB but I am finding it hard to give a fuck (C++ swizzle) Manfred <noname@add.invalid> - 2019-12-19 14:25 +0100
  Re: Probably UB but I am finding it hard to give a fuck (C++ swizzle) woodbrian77@gmail.com - 2019-12-20 08:22 -0800
    Re: Probably UB but I am finding it hard to give a fuck (C++ swizzle) Mr Flibble <flibbleREMOVETHISBIT@i42.co.uk> - 2019-12-21 13:23 +0000
  Re: Probably UB but I am finding it hard to give a fuck (C++ swizzle) "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2020-01-11 15:08 -0800
    Re: Probably UB but I am finding it hard to give a fuck (C++ swizzle) Bonita Montero <Bonita.Montero@gmail.com> - 2020-02-10 18:35 +0100
      Re: Probably UB but I am finding it hard to give a fuck (C++ swizzle) "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2020-02-10 14:07 -0800
  Re: Probably UB but I am finding it hard to give a fuck (C++ swizzle) "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2020-01-31 21:42 -0800

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