Perl GD::Graph module: bug?

[gvl]

While producing HTML Image MAP for the graph, I have found that th
first line in linespoints graph type has suspicious coordinates o
first line in graph. Values were obtained by calling

my @hotspost = $graph->gethotspot(1);
my $k = 0;
foreach my $point (@hotspots)
{
print("Name:$point->[0], X1:$point->[1],
Y1:$point->[2], X2:$point->[3], Y2:$point->[4],
Mark:@marks[$k]\n");
$k++;
}

Here are the results:

Name:line, X1:120, Y1:387, X2:120, Y2:387, Mark:7
Name:line, X1:120, Y1:387, X2:139, Y2:387, Mark:11
Name:line, X1:139, Y1:387, X2:157, Y2:387, Mark:19
Name:line, X1:157, Y1:387, X2:176, Y2:387, Mark:23
. . .
etc.

As you can see, X2 is equal to X1 for the first (!). So, the fist lin
has zero length and is always masked and hidden and overwritten by th
second line.

Is it a kind if bug? If yes - where in GD::Graph module source cod
should I correct it?

Thank you in advance
-
gv
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[Martien Verbruggen]

On Tue, 03 Aug 2004 19:42:15 GMT,
gvl <gvl.1afkho@mail.codecomments.com> wrote:

> my @hotspost = $graph->gethotspot(1);
> my $k = 0;
> foreach my $point (@hotspots)
> {
> print("Name:$point->[0], X1:$point->[1],
> Y1:$point->[2], X2:$point->[3], Y2:$point->[4],
> Mark:@marks[$k]\n");
> $k++;
> }
>
> Here are the results:
>
> Name:line, X1:120, Y1:387, X2:120, Y2:387, Mark:7
> Name:line, X1:120, Y1:387, X2:139, Y2:387, Mark:11
> Name:line, X1:139, Y1:387, X2:157, Y2:387, Mark:19
> Name:line, X1:157, Y1:387, X2:176, Y2:387, Mark:23
> . . .
> etc.
>
> As you can see, X2 is equal to X1 for the first (!). So, the fist line
> has zero length and is always masked and hidden and overwritten by the
> second line.
>
> Is it a kind if bug? If yes - where in GD::Graph module source code
> should I correct it?

This is probably a bug. As stated in the documentation, the whole
hotspot thing is rather experimental still.

You probably need to fix it in the get_hotspot function, or track back
from there. I'll add this as a possible bug to my ever growing list of
things to do.

Martien
--
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Martien Verbruggen | If at first you don't succeed, try again.
Trading Post Australia | Then quit; there's no use being a damn fool
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