Re: [graphviz-interest] Possible bug in dot

Hi Emden

On 13/07/13 02:00, Emden R. Gansner wrote:
> On 7/12/13 12:29 AM, Ron Savage wrote:
>> echo "digraph G { a->b }" | dot -Gsize=200,400
>>
>> Outputs:
>>
>> digraph G {
>> graph [size="20,40"];
>> node [label="\N"];
>> graph [bb="0,0,54,108"];
>> a [pos="27,90", width="0.75", height="0.5"];
>> b [pos="27,18", width="0.75", height="0.5"];
>> a -> b [pos="e,27,36.104 27,71.697 27,63.983 27,54.712 27,46.112"];
>> }
>>
>> but that bb and size should be the same.
>>
>> I'm not familiar with bb, so I'll leave it for you to decide.
>>
> The bb attribute gives the bounding box of image, in points.
> The size attribute specifies the maximum size of the image, in inches.
> As the input graph is small, the size attribute has no effect.
> (Appending a '!' character to the size will cause the
> output to be scaled uniformly to fit at least one of the size
> dimensions. In this case, a small image will be scaled up.)
>
> I assume either the graph [size="20,40"]; or -Gsize=200,400 is a
> miscopy, as the numbers should be the same.

Nope. Exactly as output.

I'll forward you reply to him.

Thanx.

> Also, as the size is in inches, 200,400 and even 20,40 seem a bit large.
>> Note: Our discussion started off with this entry in the Changes file,
>> when he tried to use viewport:
>>
>> February 23, 2004
>> ...
>> - add -Gviewport="X,Y,Z,x,y" where XY are the dimensions of a viewport
>> ...
>>
>> But, using V 2.30.1, 'man dot' does not show any reference to viewport.
>>
>> Was it removed at a later date but not noted in the Changes file?
> No, viewport is still available. Try as we might, the "paper"
> documentation gets out of date. We note at the bottom of
> the dot man page:
>
>> This man page contains only a small amount of the information related
>> to the Graphviz layout programs. The most
>> complete information can be found at
>> http://www.graphviz.org/Documentation.php, especially in the on-line ref-
>> erence pages.
> In general, the most reliable information on Graphviz can be found in
> the On-Line Reference Pages links.
>
> Emden
>

-- 
Ron Savage
http://savage.net.au/
Ph: 0421 920 622
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