Hi Alexandre,
Thanks for your advice. I think I saw this kind of solution here :
http://gaganb.wordpress.com/2010/09/30/draw-line-direction-on-openlayers-feature/
But he's using it for line features.
I'll try to find if there is a way to use it to modify point feature (I
don't need any arrow symbol, but just a line at the top of a triangle,
both of them would have a rotation then).
Gabriel
Le 27/07/2012 16:38, Alexandre Dubé a écrit :
Hi Gabriel,
You could try to define your own arrow symbol. There's one defined
[here], see line 1 :
OpenLayers.Renderer.symbol.arrow = [0,2, 1,0, 2,2, 1,0, 0,2]
I haven't tried it, but it could do the trick.
HTH,
Alexandre
[here]
http://code.google.com/p/rep-olnet/source/browse/trunk/Direction.js?r=61
On 12-07-27 10:18 AM, Gabriel Vatin wrote:
Hello,
I'd like to represent mobile objects (WFS layer of points) with a
triangle, and a line to show the direction and speed of it. Right
now, I can use the default "triangle" symbolizer :
symbolizer: {
rotation: '${heading}',
pointRadius: 6.5,
graphicName: 'triangle',
strokeColor: 'white',
fillColor: color,
strokeOpacity: 0.3,
strokeWidth: 2,
fillOpacity: 0.7
}
Then I use the rotation attribute to turn the trangle. The triangle
object is a isosceles triangle, but it is so small that we can't
really see its orientation. So is there a method to draw a triangle
and a line at the top of it to show the direction ?
I just tried to add a new WFS layer with the same origin, but an
other symbolizer :
defaultStyleD = new OpenLayers.Style({
rotation: '${heading}',
pointRadius: 25,
externalGraphic: './img/line.png',
graphicYOffset: -50
});
The line.png is an image I made myself. If I display the 2 layers at
the same time, that's the kind of result that I want to see... but
this is only a trick, and not a real good way to answer my problem !
Do you have any idea ?
Thanks,
Gabriel
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