Problems drawing polygons

[Julien Bessiere]

Hi Matt,
That works fine.
thank you very much.
here below is the function.
Julien

//=========================================
function drawPolygon($map,$polygon_coordinates){
	$layer = ms_newLayerObj($map);
	$layer->set("name","polygon");
	$layer->set("status",MS_DEFAULT);
	if (count($polygon_coordinates) < 3)
		$layer->set("type",MS_POINT);
	else
		$layer->set("type",MS_LAYER_POLYGON);
	$class = ms_newClassObj($layer);
	$class->label->set("type",MS_BITMAP);
	$style = ms_newStyleObj($class);
	$style->set('symbolname',"circle");
	$style->set('size',10);
	$style->color->setRGB(255,255,0);
	$style->outlinecolor->setRGB(255,255,0);
	$line = ms_newLineObj();
	foreach ($polygon_coordinates as $record){
		$point = ms_newPointObj();
		$x = $record[0];
		$y = $record[1];
		$point->setXY($x,$y);
		$line->add($point);
	}
//-------------------------------------------------------
// add the first point again to close the polygon  ------
//-------------------------------------------------------
	if (count($polygon_coordinates) > 2){
		$point = ms_newPointObj();
		$x = $polygon_coordinates[0][0];
		$y = $polygon_coordinates[0][1];
		$point->setXY($x,$y);
		$line->add($point);
	}

	$shape = ms_newShapeObj(MS_SHAPE_POLYGON);
	$shape->set("classindex", 0);
	$shape->add($line);
	$shape->set("text","MYpolygon");
	$layer->addFeature($shape);
	$point->free();
	$shape->free();
}

//===============================================================


Selon Matt Brown <mbrown at al1call.com>:

> Julien,
>
> try adding the first point again(to the end), to close the polygon.  so for
> a 4 point polygon, you will have five pairs of coordinates in your array.
>
> Matt
>
>
>
> -----Original Message-----
> From: UMN MapServer Users List [mailto:MAPSERVER-USERS at LISTS.UMN.EDU]On
> Behalf Of Julien Bessiere
> Sent: Wednesday, July 12, 2006 2:47 PM
> To: MAPSERVER-USERS at LISTS.UMN.EDU
> Subject: [UMN_MAPSERVER-USERS] Problems drawing polygons
>
>
> Hi,
> I'm using a function to draw a polygon on my maps.
> The user clicks wherever he wants and i store the coordinates in a php array
> and
> pass the array to the function.
> My problem is that the first point doesn't appear in my polygon.
> For example, if i have 4 points, my polygon will be a triangle with the
> second,
> the third and the fourth point.
>
> My array is something like :
> Array
> (
>     [0] => Array
>         (
>             [0] => -80.4178572857
>             [1] => 9.310714794
>         )
>
>     [1] => Array
>         (
>             [0] => -79.4750001429
>             [1] => 9.69642909
>         )
>
>     [2] => Array
>         (
>             [0] => -79.0785715714
>             [1] => 9.0000005
>         )
>
>     [3] => Array
>         (
>             [0] => -80.0428572857
>             [1] => 8.442857628
>         )
>
> )
>
> And here is my function :
> function drawPolygon($map,$polygon_coordinates){
> 	$layer = ms_newLayerObj($map);
> 	$layer->set("name","polygon");
> 	$layer->set("status",MS_DEFAULT);
> 	if (count($polygon_coordinates) < 3)
> 		$layer->set("type",MS_POINT);
> 	else
> 		$layer->set("type",MS_LAYER_POLYGON);
> 	$class = ms_newClassObj($layer);
> 	$class->label->set("type",MS_BITMAP);
> 	$stylepoint = ms_newStyleObj($class);
> 	$stylepoint->set('symbolname',"circle");
> 	$stylepoint->set('size',10);
> 	$stylepoint->color->setRGB(200,200,0);
> 	$line = ms_newLineObj();
> 	foreach ($polygon_coordinates as $record){
> 		$point = ms_newPointObj();
> 		$x = $record[0];
> 		$y = $record[1];
> 		$point->setXY($x,$y);
> 		$line->add($point);
> 	}
> 	$shape = ms_newShapeObj(MS_SHAPE_POLYGON);
> 	$shape->set("classindex", 0);
> 	$shape->add($line);
> 	$shape->set("text","MYpolygon");
> 	$layer->addFeature($shape);
> 	$point->free();
> 	$shape->free();
> }
>
> thanks in advance for your help
>
> Julien
>
>