220 19170 article Path: news.gmane.org!not-for-mail From: David Haim Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: Point class Date: Wed, 22 Jul 2015 21:40:13 +0300 Lines: 64 Approved: news@gmane.org Message-ID: References: Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary=001a11c2403ef63448051b7b1960 X-Trace: ger.gmane.org 1437590421 13946 80.91.229.3 (22 Jul 2015 18:40:21 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 22 Jul 2015 18:40:21 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCPLZIX24MDRBEOHX6WQKGQEPWEMCHA@isocpp.org Wed Jul 22 20:40:21 2015 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-wi0-f197.google.com ([209.85.212.197]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1ZHywE-0007KG-6j for gclcip-std-proposals@m.gmane.org; Wed, 22 Jul 2015 20:40:18 +0200 Original-Received: by wixh2 with SMTP id h2sf29636999wix.0 for ; Wed, 22 Jul 2015 11:40:17 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:content-type:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=Ekqrcsy+B/WdnSuJji+uwrmhZXPKeIQ0q32fmDzem9s=; b=InyfLAJ2WU3Lu7NcOEs6ZRa7htN96Aq2O/kjXwlWen2tLg6pcYRHYBMFU84L1LJghm CUVLR3yKuAB+OJ4wIFaagCjXGXEZZAdKi4ng3qXxw++eetxc/qFf+qlvFuZY2qK1pmCB A3SQjfhTw20oMPK98r4bjGHz7oIIiR3RsKINCgDJynERMEvgmh+UUzs6QQCKZoZOorO3 mN/fx8sW4tyxH2b1HYFDMUwehpEaGuFP/9D5ohFwXl53KGqZYL7TkftQ5UO4sZ82GiAc RBfNlpf17Rbob960HLdHk9Nyj6MPmQQFtV1puum/I5pAMseEzsdvgg9g8HbTpgbUFzHC XlQQ== X-Gm-Message-State: ALoCoQlie/wQ5dbRJP9no8U4XcJguGHn7s6czAgSa7eyZyhsOa6QfAloNzUsMGhC3JCjDz9Wt9wH X-Received: by 10.180.186.36 with SMTP id fh4mr2270417wic.7.1437590417758; Wed, 22 Jul 2015 11:40:17 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.180.126.3 with SMTP id mu3ls1321965wib.45.canary; Wed, 22 Jul 2015 11:40:16 -0700 (PDT) X-Received: by 10.180.215.8 with SMTP id oe8mr17243082wic.0.1437590414386; Wed, 22 Jul 2015 11:40:14 -0700 (PDT) Original-Received: from mail-wi0-x22f.google.com (mail-wi0-x22f.google.com. [2a00:1450:400c:c05::22f]) by mx.google.com with ESMTPS id r16si3945717wjw.41.2015.07.22.11.40.14 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 22 Jul 2015 11:40:14 -0700 (PDT) Received-SPF: pass (google.com: domain of dhayim1@gmail.com designates 2a00:1450:400c:c05::22f as permitted sender) client-ip=2a00:1450:400c:c05::22f; Original-Received: by wicmv11 with SMTP id mv11so93121072wic.0 for ; Wed, 22 Jul 2015 11:40:14 -0700 (PDT) X-Received: by 10.180.72.35 with SMTP id a3mr42439003wiv.21.1437590414044; Wed, 22 Jul 2015 11:40:14 -0700 (PDT) Original-Received: by 10.28.88.21 with HTTP; Wed, 22 Jul 2015 11:40:13 -0700 (PDT) In-Reply-To: X-Original-Sender: Dhayim1@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of dhayim1@gmail.com designates 2a00:1450:400c:c05::22f as permitted sender) smtp.mail=dhayim1@gmail.com; dkim=pass header.i=@gmail.com; dmarc=pass (p=NONE dis=NONE) header.from=gmail.com Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: X-Spam-Checked-In-Group: std-proposals@isocpp.org X-Google-Group-Id: 399137483710 List-Post: , List-Help: , List-Archive: List-Subscribe: , List-Unsubscribe: , Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:19170 Archived-At: --001a11c2403ef63448051b7b1960 Content-Type: text/plain; charset=UTF-8 I'm sorry. but a point is not a vector. the standard must be mathematical correct. now, we might want to argue if to name it "vector" class or "point" class (plus, I don't see how can we push another std::vector class :) standard C++ does not have an other namespaces other than "std"). I still think that mathematically talking - the 3 fundamental definitions are "Point" "Line" and "Plane". we need to stick to these definitions from the bottom up if we want to add new mathematical/graphical objects to standard C++. you also didn't took into consideration that not all vectors start from the origin. this may have crucial impact on future graphical/mathematical operations later on. if you want a vector object to start not from the origin you WILL need 2 points. -- --- You received this message because you are subscribed to the Google Groups "ISO C++ Standard - Future Proposals" group. To unsubscribe from this group and stop receiving emails from it, send an email to std-proposals+unsubscribe@isocpp.org. To post to this group, send email to std-proposals@isocpp.org. Visit this group at http://groups.google.com/a/isocpp.org/group/std-proposals/. --001a11c2403ef63448051b7b1960 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
I'm sorry. but a point is not a vecto= r. the standard must be mathematical correct.
now, we= might want to argue if to name it "vector" class or "point&= quot; class (plus, I don't see how can we push another std::vector clas= s :) standard C++ does not have an other namespaces other than "std&qu= ot;).
I still think that mathematically talking - the= 3 fundamental definitions are "Point" "Line" and "= ;Plane". we need to stick to these definitions from the bottom up if w= e want to add new mathematical/graphical objects to standard C++.

you also didn't took into consi= deration that not all vectors start from the origin. this may have crucial = impact on future graphical/mathematical operations later on. if you want a = vector object to start not from the origin you WILL need 2 points. =C2=A0 = =C2=A0
=C2=A0


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