[OpenLayers-Users] boundaries of lineString

[Rupesh M G]

Hi,

        Once again thanks for helping. Here is the code.

Regards,
Rupesh

// create a line feature from a list of points
var pointList = [];
var newPoint = point;
for(var p=0; p<4; ++p) {
        newPoint = new OpenLayers.Geometry.Point(newPoint.x + 
Math.random(25),
                                                        newPoint.y + 
Math.random(1));
        pointList.push(newPoint);
}

var obj = new OpenLayers.Geometry.LineString(pointList);
var lineFeature = new OpenLayers.Feature.Vector(obj,null,style_green);

alert (obj.components.toString());







"Pierre GIRAUD" <bluecarto at gmail.com> 
02/11/2008 05:39 PM

To
"Rupesh M G" <RupeshM at ibsplc.com>
cc
users at openlayers.org
Subject
Re: [OpenLayers-Users] boundaries of lineString






Can you help us understand how you create your "linestring with
4points and obtain a polygon with 8 vertices" by providing a snippet
of code ?

Regards,

On Feb 11, 2008 11:53 AM, Rupesh M G <RupeshM at ibsplc.com> wrote:
>
>         Thank you for the reply. But I think it is not correct.
>
> For example, if I draw the linestring with 4 points, I'm able to see a
> polygon with 8 vertices.
>
> But if I print the components.length of the linestring, it just says 4.
>
> I tried it with the example in the url
> http://openlayers.org/dev/examples/vector-features.html
>
>
> Regards,
> Rupesh
>
>
>
>
>  "Pierre GIRAUD" <bluecarto at gmail.com>
>
> 02/11/2008 03:58 PM
>
> To
> "Rupesh M G" <RupeshM at ibsplc.com>
>
> cc users at openlayers.org
>
> Subject Re: [OpenLayers-Users] boundaries of lineString
>
>
>
>
>
>
> It should be quite easy because geometry like lineString and Polygon
>  are composite geometries.
>  For example, a OpenLayers.LineString has a 'components' property which
>  is an array of OpenLayers.Points.
>  That way, you can get all the vertices using a loop like following :
>
>  for(var i=0; i <= thelinestring.components.length; i++) {
>     // do something with thelinestring.components[i] which is an OL 
point
>  }
>
>  Regards,
>  Pierre
>
>  On Feb 11, 2008 9:02 AM, Rupesh M G <RupeshM at ibsplc.com> wrote:
>  >
>  > Hi,
>  >
>  >         I'm working on an application about roads. There I need to 
mark a
>  > part of the road, and execute some query.
>  >
>  > My user will click a set of points to form a sequence of lines 
passing
>  > through the center of the road, because there can be bends in the 
road.
>  >
>  > I plan to draw a lineString going through these points. Using a 
bigger
>  > strokeWidth, I can show it like a road (or like a filled polygon).
>  >
>  > Is there any way to get the vertices of that polygon?
>  >
>  >
>  > Thanks & Regards,
>  > Rupesh
>  >
>  >
>  >
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DISCLAIMER: 

"The information in this e-mail and any attachment is intended only for 
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