Re: arc in shapes

[Elena Zotova <v-new mail ru>]

Lars Clausen wrote:

> On Thu, 14 Jun 2001, Elena Zotova wrote:
>
> >     Hello.
> > I am russian and speak English very bad. Excuse me, please.
> >
> > I made a patch for dia-0.88.1. This patch allow use arc of circle and
> > arc of ellipse in shapes.
> > Are you interested it?
>
> Possibly.  The current shapes format allows ellipses and arcs (like the
> standard objects) in them, what's the difference between that and yours?
>
> Here is an example ellipse and arc:
>     <svg:ellipse style="stroke-width: 0.1; stroke: #000000" cx="8.45"
>       cy="8.45" rx="3.2" ry="1.8"/>
>     <svg:path style="stroke-width: 0.1; stroke: #000000" d="M
>       8.35315,8.98804 A 1.84244,1.84244 0 0 1 8.37768,10.0654"/>

In first, in shapes for dia-0.88.1 simbol A in path ansupported. Excuse, if it
allow in more new version.
(Quotation from castom-shapes for dia-0.88.1:"The line, polyline, polygon, rect,
circle, ellipse, path and g elements are supported.  Note that the path element
only supports the M,m,L,l,H,h,V,v,C,c,S,s,Z and z commands.", and my attempt copy
this exaple call warning:"** WARNING **: unsupported path codde 'A' " and don't
show enithing in this shape).

Two, in this example IMHO too many parameters (IMHO 6 enough, against 7 in
example) and it use is slightly complication.

And will be good, if path allow build arc across three point, but it is only
dream.

I made arc as individual svg-node like circle or ellipse. And for more easy in
use separately for circle arc and ellipse arc.
<svg:carc cx="..." cy="..." r="..." a1="..." a2="..."/>
 This is a arc of circle with centre (cx,cy) and radius r from angle a1  to angle
a2. The angles are measured in degrees counter-clockwise.
<svg:earc cx="..." cy="..." r="..." a1="..." a2="..."/>
 This is a arc of ellipse with centre (cx,cy) and radius rx in the x direction
and ry in the y direction from angle a1 to angle a2. The angles are measured in
degrees counter-clockwise.