[OpenLayers-Users] Tweening pinpoints

Thu Dec 8 10:29:48 EST 2011

Yep, agree. I'll paste it shortly. 

________________________________

From: Casper Span [mailto:info at spatially-oriented.com] 
Sent: 08 December 2011 15:24
To: Takako Tucker
Cc: openlayers-users at lists.osgeo.org
Subject: Re: [OpenLayers-Users] Tweening pinpoints

Perhaps you could share parts of your code and the error you are
getting?
I think that will be more efficient then you having to recode another
example :)

Casper

On Thu, Dec 8, 2011 at 2:59 PM, Takako Tucker <Takako.Tucker at bbc.co.uk>
wrote:

	Hi Casper

	Do you think you could put up an example page somewhere for
moving pinpoints? 
	I've put the code in, but throws an error which I'm struggling
to get rid of! 

	I've been having a look at this one too
http://openlayers.org/dev/tests/manual/tween.html
<http://openlayers.org/dev/tests/manual/tween.html> 
	but not luck converting this into my code. 

	Takako

________________________________

	From: Casper Span [mailto:info at spatially-oriented.com] 

	Sent: 07 December 2011 20:56 

	To: Takako Tucker
	Cc: Adam Eskreis; openlayers-users at lists.osgeo.org
	Subject: Re: [OpenLayers-Users] Tweening pinpoints

	Hi Takako,

	In my example I wanted the map to move.
	However, it should be fairly easy to adapt the code to your
liking.

	Basically what I do is letting the tween class calculate my path
& timing, and on eachStep I move the map. On eachStep, you should move
your pinpoint with something like this: (NOTE: not tested)

	someFunc: function() {

	// var fromCoord = your starting point
	// var toCoord = your destination point
	// var duration = number of steps it should take, the more you
take, the smoother the ride & longer it will take. (unless you also
change the INTERVAL constant on Tween)
	var callbacks = {
	   eachStep: tweenstep
	};
	var tween = new
OpenLayers.Tween(OpenLayers.Easing.Quad.easeInOut);
	tween.start(fromCoord, toCoord, duration, {callbacks: callbacks}

	},

	tweenstep: function (value) {
	  // TODO: move your feature to the new coord
	  // given in value.x and value.y
	},

	And another note: the tweenstep function is being called from
the tween class, so you are out of scope and cannot see your feature.
That's why, in my blogpost, I also stored the map object into the tween.
You will probably have to do something similar with your feature.

	If you can't get this to work, I might be able to set up a
sample somewhere. Also, you might have some luck looking at the
developer example code:
	http://openlayers.org/dev/tests/manual/tween.html

	regards,
	Casper

	On Wed, Dec 7, 2011 at 6:39 PM, Takako Tucker
<Takako.Tucker at bbc.co.uk> wrote:

		Hi, so this is what I currently got. 

		http://paste.org/41978

		I can't seem to see Tweening working between
pinpoints... Any advise would be much appreciated. 
		The map shouldn't move and just pinpoints should move...

		Takako

________________________________

		From: Casper Span [mailto:info at spatially-oriented.com] 
		Sent: 07 December 2011 10:38
		To: Takako Tucker

		Cc: Adam Eskreis; openlayers-users at lists.osgeo.org 

		Subject: Re: [OpenLayers-Users] Tweening pinpoints

		I dabbled a bit with this a few weeks ago and posted a
small blog on it... Maybe it helps.

http://www.spatially-oriented.com/joomla/tech/34-gis-articles/59-animate
d-zoom-with-openlayers

		On Wed, Dec 7, 2011 at 10:55 AM, Takako Tucker
<Takako.Tucker at bbc.co.uk> wrote:

			Thanks for this! I had a look at .Tween, but as
it reacts to DOM elements I couldn't be sure if it works with Lon Lat
(X.Y) figure. 
			I'll try again later on though. 

________________________________

			From: Adam Eskreis [mailto:aeskreis at gmail.com] 
			Sent: 06 December 2011 18:03
			To: Takako Tucker
			Cc: openlayers-users at lists.osgeo.org
			Subject: Re: [OpenLayers-Users] Tweening
pinpoints

			There is an OpenLayers.Tween class I believe.

			Also, this is something that could easily be
done iwth just regular javascript.  Don't forget, OpenLayers is
comprised of DOM elements, so you can manipulate the map with regular
javascript, you don't have to use an OpenLayers construct.

			On Tue, Dec 6, 2011 at 12:33 PM, Takako Tucker
<Takako.Tucker at bbc.co.uk> wrote:

				Hello, 

				I'm currently using
OpenLayers.Control.DragFeature to move pinpoint from one place to
another. 

				        var dragFeature = new
OpenLayers.Control.DragFeature(location); 

map.addControl(dragFeature); 

dragFeature.activate(); 

				But not only moving pinpoints, I need to
add tween animation. 

				Has anyone done tween animation for
moving pinpoints? 

				Any advise would be much appreciated! 

				Thanks 

				Takako 

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