X-Authentication-Warning:	delorie.com: mail set sender to geda-user-bounces using -f
X-Recipient:	geda-user AT delorie DOT com
X-Original-DKIM-Signature:	v=1; a=rsa-sha256; c=relaxed/relaxed;
	d=gmail.com; s=20161025;
	h=date:from:to:subject:message-id:in-reply-to:references:mime-version
	:content-transfer-encoding;
	bh=Vf2LH1opVtLCcvyFS+hgEF0HwK5LxiIZhULLa9os5Jg=;
	b=hbiGjVNkHQO7fOoPmDdLEkrMYgmCuCVkzGb6F8TBD/3SaHrMbprvWkb5zN1rpJRdpz
	G8l+jULVu7e2Z3C4O8FlPOO2YyUVaTCWHaa1Z7vqCxAIY7b/spGWH+Fz0iCE2a287fzt
	pAErgCWYUxuHoGZSOyBhypQ5tiFoyjOtvPuBkQiZhMD4Ar3A+wl5k55hgi/a68gW3u6w
	yBck2OoVIIU1BPX4HdS5KnR0ffruelsD7M9tDno7LeIS87mavOl10DLN6AM/aQUVkL/z
	36Bp63GsZcbdHFO/5YwQbxY7fwfuuzZmpi5iSEQLGSu4M1ngr5OEcs1CRzEZMYuJuMxG
	L4pA==
X-Google-DKIM-Signature:	v=1; a=rsa-sha256; c=relaxed/relaxed;
	d=1e100.net; s=20161025;
	h=x-gm-message-state:date:from:to:subject:message-id:in-reply-to
	:references:mime-version:content-transfer-encoding;
	bh=Vf2LH1opVtLCcvyFS+hgEF0HwK5LxiIZhULLa9os5Jg=;
	b=Rl7euC/g37+p4/LDtRu+TUn1/a0tPGwuwJAoaUKJfuwTsHLJcodfCDA+TcydUHfcEo
	AMRmBD+VIXx1vPnzGGWwoBlXND03pMYhLv3fcOMuMy7C/za+p51fsH0lRsgvH8ITPy6l
	dBppdxPRtF0tYey2g6K7VOztjrmAp2aAzctcz/JYZFZSACBrM1UlM7XWN1VVIbJ612yV
	/B6wpsaXS3m53vP4yl6RtDi4N1yPlnNferzbpDTGEecqaToYEvv1bCoke8DNVCvmkoLt
	jSjzg2E4WTuycnNCQ4aIeucIJtpCChD66SdK3M2E2BljWWBPKX3nQwouVDLzB/qqPH+M
	p44Q==
X-Gm-Message-State:	AMke39kDQjSyPd7xY4RwOuLiM+o+nH/IMQ+L7sPMeXn0J0OPUv8RtxKdKu0F1TYe+Miqag==
X-Received:	by 10.25.170.1 with SMTP id t1mr5683383lfe.105.1488831865485;
	Mon, 06 Mar 2017 12:24:25 -0800 (PST)
Date:	Mon, 6 Mar 2017 21:24:21 +0100
From:	"Nicklas Karlsson (nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
To:	geda-user AT delorie DOT com
Subject:	Re: [geda-user] Rubberband move keeping lines direction
Message-Id:	<20170306212421.a658cb36967460efbe4ba474@gmail.com>
In-Reply-To:	<CAGqyy=a7SFSnSUeBSiZBYFidGB=k3B=DQfHZD=Z6YqLn6FEj3w@mail.gmail.com>
References:	<CAGqyy=bjaaMDLLybUPdE=3h1eb4puBmHQuJL4YwFy8Nvyv5R9A AT mail DOT gmail DOT com>
	<CAGqyy=a7SFSnSUeBSiZBYFidGB=k3B=DQfHZD=Z6YqLn6FEj3w AT mail DOT gmail DOT com>
X-Mailer:	Sylpheed 3.5.1 (GTK+ 2.24.31; x86_64-pc-linux-gnu)
Mime-Version:	1.0
Reply-To:	geda-user AT delorie DOT com
Errors-To:	nobody AT delorie DOT com
X-Mailing-List:	geda-user AT delorie DOT com
X-Unsubscribes-To:	listserv AT delorie DOT com

> Hi all,
> 
> I have been lately working on my spare time on trying to make the
> "rubberband" move keep track directions, when moving a line attached
> to other two lines, one on each end.

To keep track directions make a lot of sense.

> ...
> 
> - If so, determine how the line and the rubberband lines should move
> to keep their directions. To do this, I had to create fgeometry.c,
> which does floating point geometry.

I you remember original position line should be elongenated until it hit the moved line. You need to calculate the intersection point, it is a good idea to remember original point during move and if workin 45 or 90 degree angles on a grid rounding errors will probably not be a problem, I think anyway.

> ...
> - In the RubberbandType struct, add DX and DY fields, to indicate how
> things have to move when in this mode.
> 
> ... The line (main line being
> moved, not neighbour lines) movement is not a "move line" action
> anymore, but two "move pointline" actions. So it would look weird on
> the Undo history. Would that be OK?
> 
> Hope it makes sense. If anyone could try the patch and give me some
> feedback it would be great!
> 
> Luis
> 
> P.S. Just to clarify, the feature works fine with the "ghost" lines. It is
> the actual movement, when the mouse button is released, that is not
> completed due to the Undo history thing, which I don't know how to
> deal with.


If you have problem with the math to calculate intersection point(s) of lines I might be able to help you?


Regards Nicklas Karlsson

- Raw text -