Undefined offset in GD library

[audiopro]

I have an error which I just do not understand, hopefully one of you guys will enlighten me. I have a script which plots lines between points. I am using polygons to make the lines thicker.

echo "$endx1,$endy1 | $endx2,$endy2 | $endx3,$endy3 | $endx4,$endy4<br><br>";
$poynts = array($endx1,$endy1,$endx2,$endy2,$endx3,$endy3,$endx4,$endy4);
imagefilledpolygon ( $thumb , $poynts,  4 , $hiculler );

Most of the lines are plotted correctly but occasionally the script throws an error. Here is an example of values which caused this mysterious 'Undegfined offset' error.

312,260 | 311,255 | 374,247 | 375,252

Notice: Undefined offset: 0 in /[URL unfurl="true"]www.xxxxxxxxxxxxx[/URL] on line 168

Line 68 is the call to imagefilledpolygon.

I would have thought this error would occur if two adjacent plot points were the same but all the plot points are different.

Any clue why I am getting this error?

Keith

http://www.studiosoft.co.uk

 

[jaxtell]

Hi Keith,
I don't see the problem. Can you provide me with enough code so I can try to recreate it?

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I cannot be bought. Find leasing information at

http://www.joshaxtell.com/

 

[Ante0]

Are you sure you're on the correct line?
Notice: Undefined offset: 0 in /

http://www.xxxxxxxxxxxxx

on line 168

and you say 68 is imagefilledpolygon.

I don't see any problem either...
You did define $thumb and $hiculler?

 

[audiopro]

Sorry the line number should have been 168. It is really strange that only certain number combinations cause this error. I am plotting 50 lines and just the odd one causes the problem. It seems to happen when there is a difference of 1 in both x and y coords. There is a calculation before this section so I have made it spread the values a bit. This part is for line drawing only, the calcs are done on single points. I will live with it for now and see if it causes further problems.
Thanks for the assistance

Keith

http://www.studiosoft.co.uk