[Mapserver-users] Not producing the number of points in a Line Object

[Jan Hartmann]

Terrence,

I don't think this is a bug. I ran the following script in my browser:

<?
$line = ms_newLineObj();
$point1 = ms_newPointObj();
$point1->setXY(0,0);
$line->addPoint($point1);
echo ($line->numpoints);
echo ("<br>");
$point2 = ms_newPointObj();
$point2->setXY(10,10);
$line->add($point2);
echo ($line->numpoints);
?>

and got as a result:

1
2

I guess this is because Mapscript member variables behave different from 
normal PHP ones. E.g. you cannot assign directly to $point->x and 
$point->y; you have to use $point->setXY(). Something like that could 
prevent var_dump from seeing the numpoints member of $line. I wonder why 
it does see the x and y members of $point though. I'm not sure about 
this, so perhaps someone from DM can say something about the interaction 
between PHP and MapScript variables?

Jan Hartmann


> Hello all,
> 
> When i  use $point->setXY(double x,double y,double m) and then 
> var_dump($point) the output shows the correct coordinates of the point.
> 
> However, when i use $line->add(pointObject point) or $line->addXY(double 
> x,double y, double m) and then var_dump($line) the member variable 
> numpoints of $line says that there are 0 points in the line.
> 
> How can i correct this?
> 
> Thanks
> 
> Terrence.
> 

Jan Hartmann
Department of Geography
University of Amsterdam
jhart at frw.uva.nl