FlyingSaucer is not working for me ! the shapefile is displayed, but there
is nothing animated and the window just freezes so I cannot close it anymore
On Mon, May 9, 2011 at 6:42 AM, Jody Garnett <[email protected]> wrote:
> lol; these are all very common questions :-) let me try and answer...
>
> On Monday, 9 May 2011 at 1:15 PM, mounir younes wrote:
>
> I am willing to use the ExternalGraphicsFactory to draw building icons on
> my map (format png) can someone help in this task and provide me with the
> appropriate code? I checked the user list and there is no example on how to
> use it !
>
> That is because you do not need ExternalGraphicsFactory to do this work;
> PNG is supported out of the box:
>
> See the example here (search for png on that page):
> - http://docs.geotools.org/latest/userguide/library/render/style.htmlr
>
> And I have a second question. What is the best way to simulate a car moving
> on a map? I need to change its position.
>
> I tell you what is not a great way; making a feature collection with your
> single point and then updating each second as and asking the map to redraw.
> We get a person here every other week trying this out; and complaining that
> gt-renderer is slow.
>
> There is a flyingsaucers demo you can review; but the real answer is to
> set up a second raster to draw your moving car into; and draw that over top
> of the map rendered by gt-renderer.
>
> Remember that JMapPane is just a demo showing how you can use
> StreamingRenderer to draw into a BufferedImage. You can do the same thing in
> your own code; and have one buffered image for the map and a second one for
> your "overlays" including the moving car.
>
> One more question. Does anyone know a good 2D renderer ? because the
> gt-renderer flickers a lot, how could this be solved?
>
> It is more how you use it :-) The GeoTools renderer is doing a lot of
> calculation and data access; not what you want in the middle of animation.
>
> Remember gt-renderer is not loading your data into memory; just drawing
> from disk each time. You can experiment with loading your data into memory
> (specifically into a spatial index) if you want faster performance out of
> it.
>
> Reference:
> -
> http://docs.geotools.org/latest/userguide/library/main/collection.html#performance-options
> Jody
>
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