[OpenLayers-Users] WMS request done twice - transitionEffect - OL implementation

[gbrun]

Hi!

I've just gone into the same problem and I found my mistake: I applied the  
"transitionEffect" parameter inside my WMS request. In fact, this is a  
layer property, so you must specify this property after you WMS  
definition, like this:

	layer = new OpenLayers.Layer.WMS(
		"Layer Name", "WMS_url",
			{layers: 'layer',
			format: 'image/png',
			buffer: 0,
			singleTile: true,
			ratio: 1,
             			transparent: true,
			},{
			transitionEffect: 'resize'
			}
	);

I hope it will help you!

Geoffrey


On Sat, 06 Aug 2011 20:15:36 +0200, paweluz <paweluzdev at o2.pl> wrote:

> Hi
>
> I am using OL 2.10 and I noticed something strange... When I am doing
> zooming or panning on map request is done twice for images that are  
> tiled. I
> know that responsible for that is parameter transitionEffect  that I have
> set to resize. When I change it to null requests are ok - done just once.
> But on map it does not look good... I really like this transition effect  
> for
> resize value.
> My question is:
> Is OL implementation fine - I am just wandering since OL map already has
> those images that needs to be resize (old tile for transition effect),  
> and
> only one request needs to be done for new tiles.... why OL makes those
> requests twice. It is really hard for me to understand... Can anyone  
> please
> explain it to me? Or maybe this is a bug, and is near future it will be
> fixed?
>
>
> Regards,
> Pawel
>
> --
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