[x3d-public] Earth Navigation [was: x3d-public Digest, Vol 81, Issue 8]

Sun Dec 6 09:50:13 PST 2015

I'll try fly mode.. 
I thought navigation like in cesium could be a standard...

Le 4 décembre 2015 20:50:19 UTC+01:00, Mike McCann <mccann at mbari.org> a écrit :
>Hello Clement,
>
>Have you tried GeoViewpoint? In fly mode it performs velocity scaling
>relative to distance from the ellipsoid.
>
>Navigation in X3D browsers is much more general than in customized
>globe viewers. You can navigate anywhere using different modes, for
>example to explore sub-surface geological features. Building upon the
>Geospatial component I suspect it's feasible to implement a new
>navigation mode which restricts navigation to positive elevations with
>speed scaling and center of rotation management, emulating Cesium's
>navigation behavior.
>
>Best regards,
>Mike
>
>--
>Mike McCann
>Software Engineer
>Monterey Bay Aquarium Research Institute
>7700 Sandholdt Road
>Moss Landing, CA 95039-9644
>Voice: 831.775.1769  Fax: 831.775.1736 http://www.mbari.org
>
>On Dec 4, 2015, at 8:45 AM, Leonard Daly <Leonard.Daly at realism.com>
>wrote:
>
>> Clement,
>> 
>> I have a simple example at
>http://tools.realism.com/x3d-examples/EarthNavigation/index.html. This
>does everything except the 2D rotation. I put this together in about 1
>hour using existing stock X3D/X3DOM capabilities. 
>> 
>> To reproduce the 2D rotation, the control+buttons event would need to
>be captured prior to the existing Navigation and the proper orientation
>algorithm applied. I don't have the time to work on this right now. I
>would start with seeing if jQuery could capture a button down event on
>the <scene> tag (id='x3dScene' in this example) prior to Navigation
>getting it. The it becomes a simple matter of applying the correct
>algorithm based on the starting position and the current cursor
>position in the X3D window.
>> 
>> At this time I am having a hard time trying to figure out the
>conditions when you would want to use the feature to change the
>ground-plane orientation. If you could describe a situation when this
>would be useful (or needed), I may be able to develop an alternative.
>> 
>> If you want to just be able to "straighten-up" the Earth so that
>North is vertical while keeping the same lat/long in the center of the
>screen, then an HTML button could be used to perform this
>reorientation. That would involve changing the 'orientation' field in
>the Viewpoint node (in EarthNavigator.x3d). The hardest part is
>figuring out the new rotation angle and vectors.
>> 
>> 
>> Leonard Daly
>> 
>> 
>> 
>>> Hi Leonard,
>>> 
>>> What better explanation than this demo (even if buggy) ?
>>> https://cesiumjs.org/Cesium/Apps/HelloWorld.html
>>> 
>>> It looks like:
>>> - "turntable" mode
>>> AND
>>> - ability to change angle with the ground plan without loosing
>control.
>>> 
>>> To sum up:
>>> We keep the center of globe as rotation center with mouse left click
>>> Right mouse rolling button is used for zoom
>>> AND middle button allow this famous navigation in a semi-sphere
>around
>>> the z axis (altitude).
>>> 
>>> I'm currently working with three.js as a demo to suggest a working
>solution...
>>> 
>>> Clement.
>>> 
>>> On Thu, Dec 3, 2015 at 10:21 PM, Leonard Daly
><Leonard.Daly at realism.com> wrote:
>>>> Clement,
>>>> 
>>>> I am not sure exactly what kind of navigation you need to have. It
>seems a
>>>> little excessive (to me), to give up all of the geometry and
>texture
>>>> management that a declarative 3D environment provide just because
>the
>>>> built-ion navigation is not exactly what you need.
>>>> 
>>>> The X3D specification include basic navigation for the environments
>that
>>>> were in use at the time. Geospatial environment were not in use
>then.
>>>> Perhaps X3D navigation should have been expanded for Geospatial,
>but for a
>>>> number of reasons it was not.
>>>> 
>>>> It is possible to build custom navigation for X3D on top of the
>basic
>>>> functionality. If the desired navigation is too complex to build it
>on top
>>>> of existing capabilities, then a new navigation capability can be
>added to
>>>> the X3DOM code -- probably with about as much work as would take to
>add it
>>>> to three.js.
>>>> 
>>>> Can you described in detail what you want your navigation to do?
>>>> 
>>>> For example: On left button down, the use should travel at current
>elevation
>>>> about the surface on a great circle in the indicated direction.
>>>> 
>>>> 
>>>> Leonard Daly
>>>> 
>>>> 
>>>> 
>>>> 
>>>> Does cobweb will provide a navigation not in specifications but
>able
>>>> to decently navigate around a planet?
>>>> 
>>>> I'm working with x3dom for some times but I'm going to migrate to
>>>> three.js just because of navigation issues... :-(
>>>> 
>>>> Clement.
>>>> 
>>>> On Wed, Dec 2, 2015 at 9:38 PM, Andreas Plesch
><andreasplesch at gmail.com>
>>>> wrote:
>>>> 
>>>> Hi Cris,
>>>> 
>>>> try the developer version of x3dom. There have been improvements to
>the
>>>> triangulatisation of concave polygons in the last couple of weeks.
>>>> 
>>>> When I view your x3d here
>>>> 
>>>> http://andreasplesch.github.io/Library/Viewer/x3dweb.html
>>>> 
>>>> it works fine in x3dom but has some problems in cobweb.
>>>> 
>>>> Be careful when pasting in the scene to not cut numbers in the long
>lines in
>>>> half by line breaks (happened to me first).
>>>> 
>>>> Hope this helps,
>>>> 
>>>> -Andreas
>>>> 
>>>> 
>>>> Message: 1
>>>> Date: Wed, 2 Dec 2015 16:21:52 +0100
>>>> From: Cris Lacumba <cris.lacumba at gmail.com>
>>>> To: Leonard Daly <Leonard.Daly at realism.com>
>>>> Cc: x3dom mlist <x3dom-users at lists.sourceforge.net>,
>>>>         x3d-public at web3d.org
>>>> Subject: Re: [x3d-public] 3D wrong visualization
>>>> Message-ID:
>>>> 
>>>>
><CAF3UkD5-AEkKia5Y8Jc9Vt1FM0TFTpARGGKSRhKvjBMv9HRYHQ at mail.gmail.com>
>>>> Content-Type: text/plain; charset="utf-8"
>>>> 
>>>> Sure,
>>>> 
>>>> I have attached it.
>>>> 
>>>> Thanks in advance
>>>> 
>>>> 2015-12-02 16:13 GMT+01:00 Leonard Daly <Leonard.Daly at realism.com>:
>>>> 
>>>> Cris,
>>>> 
>>>> Is it possible to post the X3D file(s)? It's difficult for me to
>tell if
>>>> there is geometry coordinate round-off errors or something else.
>>>> 
>>>> 
>>>> Leonard Daly
>>>> 
>>>> 
>>>> 
>>>> Hi all,
>>>> 
>>>> I'm visualizing some polygons in X3DOM and they are not correctly
>>>> visualized.
>>>> In InstantReality (black background) is correctly visualized,
>however,
>>>> in
>>>> X3DOM I get an incorrect visualization.
>>>> 
>>>> Is there some solution?
>>>> 
>>>> Thanks in advance
>>>> 
>>>> Best regards
>>>> 
>>>> _______________________________________________
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>>>> 
>>>> 
>>>> 
>>>> --
>>>> Leonard Daly
>>>> 3D Systems & Cloud Consultant
>>>> X3D Co-Chair on Sabbatical
>>>> LA ACM SIGGRAPH Chair
>>>> President, Daly Realism - Creating the Future
>>>> 
>>>> _______________________________________________
>>>> x3d-public mailing list
>>>> x3d-public at web3d.org
>>>> http://web3d.org/mailman/listinfo/x3d-public_web3d.org
>>>> 
>> 
>> 
>> -- 
>> Leonard Daly
>> 3D Systems & Cloud Consultant
>> X3D Co-Chair on Sabbatical
>> LA ACM SIGGRAPH Chair
>> President, Daly Realism - Creating the Future
>> _______________________________________________
>> x3d-public mailing list
>> x3d-public at web3d.org
>> http://web3d.org/mailman/listinfo/x3d-public_web3d.org

clement at igonet.fr
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