AR.js trying to synchronize scene to compass north












1















I'm setting up augmented reality with AR.js, and I'm trying to get the camera/scene to be oriented to due North when the page loads.



Short example is that I'm trying to create a view that has a virtual compass with North/East/South/West displayed to the user.



I've got it working to a certain extent so far, but the calibration seems a little off at times. I'm using a MEAN stack and AR.js



Here's what I have:



view.html:



<a-scene embedded arjs='sourceType: webcam; debugUIEnabled: false;'>
<a-entity id="camera-entity" wasd-controls-enabled="false" position="0 -2 0" rotation="0 0 0" aframe-injected="">
<a-camera></a-camera>
</a-entity>
<a-text font="kelsonsans" width="6" position="0 0 -3.5" rotation="0 0 0" text="" value="North"></a-text>
</a-scene>


angular client controller (this section running only once on initialization):



var compass = event.webkitCompassHeading;
document.querySelector('#camera-entity').object3D.rotation.y = THREE.Math.degToRad(-compassdir);


Am I doing something incorrect with how I'm setting rotation on the camera-entity? Is there a better way to do this? Any suggestions?



I have compass bearing outputting to my development display, and it appears that the hardware is getting compass readings correctly.



Hardware: iPhone X



Reference:
Also, see this for reference regarding how aframe orients to relative phone position when opening:
https://github.com/aframevr/aframe/issues/349
And this for reference about a-frame rotation:
https://aframe.io/docs/0.8.0/components/rotation.html










share|improve this question



























    1















    I'm setting up augmented reality with AR.js, and I'm trying to get the camera/scene to be oriented to due North when the page loads.



    Short example is that I'm trying to create a view that has a virtual compass with North/East/South/West displayed to the user.



    I've got it working to a certain extent so far, but the calibration seems a little off at times. I'm using a MEAN stack and AR.js



    Here's what I have:



    view.html:



    <a-scene embedded arjs='sourceType: webcam; debugUIEnabled: false;'>
    <a-entity id="camera-entity" wasd-controls-enabled="false" position="0 -2 0" rotation="0 0 0" aframe-injected="">
    <a-camera></a-camera>
    </a-entity>
    <a-text font="kelsonsans" width="6" position="0 0 -3.5" rotation="0 0 0" text="" value="North"></a-text>
    </a-scene>


    angular client controller (this section running only once on initialization):



    var compass = event.webkitCompassHeading;
    document.querySelector('#camera-entity').object3D.rotation.y = THREE.Math.degToRad(-compassdir);


    Am I doing something incorrect with how I'm setting rotation on the camera-entity? Is there a better way to do this? Any suggestions?



    I have compass bearing outputting to my development display, and it appears that the hardware is getting compass readings correctly.



    Hardware: iPhone X



    Reference:
    Also, see this for reference regarding how aframe orients to relative phone position when opening:
    https://github.com/aframevr/aframe/issues/349
    And this for reference about a-frame rotation:
    https://aframe.io/docs/0.8.0/components/rotation.html










    share|improve this question

























      1












      1








      1


      2






      I'm setting up augmented reality with AR.js, and I'm trying to get the camera/scene to be oriented to due North when the page loads.



      Short example is that I'm trying to create a view that has a virtual compass with North/East/South/West displayed to the user.



      I've got it working to a certain extent so far, but the calibration seems a little off at times. I'm using a MEAN stack and AR.js



      Here's what I have:



      view.html:



      <a-scene embedded arjs='sourceType: webcam; debugUIEnabled: false;'>
      <a-entity id="camera-entity" wasd-controls-enabled="false" position="0 -2 0" rotation="0 0 0" aframe-injected="">
      <a-camera></a-camera>
      </a-entity>
      <a-text font="kelsonsans" width="6" position="0 0 -3.5" rotation="0 0 0" text="" value="North"></a-text>
      </a-scene>


      angular client controller (this section running only once on initialization):



      var compass = event.webkitCompassHeading;
      document.querySelector('#camera-entity').object3D.rotation.y = THREE.Math.degToRad(-compassdir);


      Am I doing something incorrect with how I'm setting rotation on the camera-entity? Is there a better way to do this? Any suggestions?



      I have compass bearing outputting to my development display, and it appears that the hardware is getting compass readings correctly.



      Hardware: iPhone X



      Reference:
      Also, see this for reference regarding how aframe orients to relative phone position when opening:
      https://github.com/aframevr/aframe/issues/349
      And this for reference about a-frame rotation:
      https://aframe.io/docs/0.8.0/components/rotation.html










      share|improve this question














      I'm setting up augmented reality with AR.js, and I'm trying to get the camera/scene to be oriented to due North when the page loads.



      Short example is that I'm trying to create a view that has a virtual compass with North/East/South/West displayed to the user.



      I've got it working to a certain extent so far, but the calibration seems a little off at times. I'm using a MEAN stack and AR.js



      Here's what I have:



      view.html:



      <a-scene embedded arjs='sourceType: webcam; debugUIEnabled: false;'>
      <a-entity id="camera-entity" wasd-controls-enabled="false" position="0 -2 0" rotation="0 0 0" aframe-injected="">
      <a-camera></a-camera>
      </a-entity>
      <a-text font="kelsonsans" width="6" position="0 0 -3.5" rotation="0 0 0" text="" value="North"></a-text>
      </a-scene>


      angular client controller (this section running only once on initialization):



      var compass = event.webkitCompassHeading;
      document.querySelector('#camera-entity').object3D.rotation.y = THREE.Math.degToRad(-compassdir);


      Am I doing something incorrect with how I'm setting rotation on the camera-entity? Is there a better way to do this? Any suggestions?



      I have compass bearing outputting to my development display, and it appears that the hardware is getting compass readings correctly.



      Hardware: iPhone X



      Reference:
      Also, see this for reference regarding how aframe orients to relative phone position when opening:
      https://github.com/aframevr/aframe/issues/349
      And this for reference about a-frame rotation:
      https://aframe.io/docs/0.8.0/components/rotation.html







      three.js aframe ar.js






      share|improve this question













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      asked Nov 24 '18 at 14:38









      gregmgregm

      184




      184
























          1 Answer
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          If you want your items on the marker to be oriented compass-wise, then I'd suggest rotating the scene, not messing with the camera



          <a-marker>
          <a-entity id='parent' rotate-this-with-the-compass-readings>
          <!-- Everything you want to rotate northwise --!>
          </a-entity
          </a-marker>


          Preferably, with a aframe component, to be sure the element is ready:



          AFRAME.registerComponent("rotate-this-with-the-compass-readings", {
          init: function() {
          var compassdir // however you get the compass reading
          var pos = this.el.getAttribute('position')
          pos.y = THREE.Math.degToRad(-compassdir);
          this.el.setAttribute('position', pos)
          }
          })





          share|improve this answer


























          • Hey thanks for the feedback, and I did try your method of setting rotate on the whole scene itself. I'm actually not orienting a marker though; I'm setting up an AR compass edit: it's late and perhaps I spoke too soon. I think it may have something to do with how I'm getting compass reading though

            – gregm
            Nov 26 '18 at 0:57













          Your Answer






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          active

          oldest

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          1














          If you want your items on the marker to be oriented compass-wise, then I'd suggest rotating the scene, not messing with the camera



          <a-marker>
          <a-entity id='parent' rotate-this-with-the-compass-readings>
          <!-- Everything you want to rotate northwise --!>
          </a-entity
          </a-marker>


          Preferably, with a aframe component, to be sure the element is ready:



          AFRAME.registerComponent("rotate-this-with-the-compass-readings", {
          init: function() {
          var compassdir // however you get the compass reading
          var pos = this.el.getAttribute('position')
          pos.y = THREE.Math.degToRad(-compassdir);
          this.el.setAttribute('position', pos)
          }
          })





          share|improve this answer


























          • Hey thanks for the feedback, and I did try your method of setting rotate on the whole scene itself. I'm actually not orienting a marker though; I'm setting up an AR compass edit: it's late and perhaps I spoke too soon. I think it may have something to do with how I'm getting compass reading though

            – gregm
            Nov 26 '18 at 0:57


















          1














          If you want your items on the marker to be oriented compass-wise, then I'd suggest rotating the scene, not messing with the camera



          <a-marker>
          <a-entity id='parent' rotate-this-with-the-compass-readings>
          <!-- Everything you want to rotate northwise --!>
          </a-entity
          </a-marker>


          Preferably, with a aframe component, to be sure the element is ready:



          AFRAME.registerComponent("rotate-this-with-the-compass-readings", {
          init: function() {
          var compassdir // however you get the compass reading
          var pos = this.el.getAttribute('position')
          pos.y = THREE.Math.degToRad(-compassdir);
          this.el.setAttribute('position', pos)
          }
          })





          share|improve this answer


























          • Hey thanks for the feedback, and I did try your method of setting rotate on the whole scene itself. I'm actually not orienting a marker though; I'm setting up an AR compass edit: it's late and perhaps I spoke too soon. I think it may have something to do with how I'm getting compass reading though

            – gregm
            Nov 26 '18 at 0:57
















          1












          1








          1







          If you want your items on the marker to be oriented compass-wise, then I'd suggest rotating the scene, not messing with the camera



          <a-marker>
          <a-entity id='parent' rotate-this-with-the-compass-readings>
          <!-- Everything you want to rotate northwise --!>
          </a-entity
          </a-marker>


          Preferably, with a aframe component, to be sure the element is ready:



          AFRAME.registerComponent("rotate-this-with-the-compass-readings", {
          init: function() {
          var compassdir // however you get the compass reading
          var pos = this.el.getAttribute('position')
          pos.y = THREE.Math.degToRad(-compassdir);
          this.el.setAttribute('position', pos)
          }
          })





          share|improve this answer















          If you want your items on the marker to be oriented compass-wise, then I'd suggest rotating the scene, not messing with the camera



          <a-marker>
          <a-entity id='parent' rotate-this-with-the-compass-readings>
          <!-- Everything you want to rotate northwise --!>
          </a-entity
          </a-marker>


          Preferably, with a aframe component, to be sure the element is ready:



          AFRAME.registerComponent("rotate-this-with-the-compass-readings", {
          init: function() {
          var compassdir // however you get the compass reading
          var pos = this.el.getAttribute('position')
          pos.y = THREE.Math.degToRad(-compassdir);
          this.el.setAttribute('position', pos)
          }
          })






          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited Nov 24 '18 at 23:11

























          answered Nov 24 '18 at 23:01









          Piotr Adam MilewskiPiotr Adam Milewski

          5,62321227




          5,62321227













          • Hey thanks for the feedback, and I did try your method of setting rotate on the whole scene itself. I'm actually not orienting a marker though; I'm setting up an AR compass edit: it's late and perhaps I spoke too soon. I think it may have something to do with how I'm getting compass reading though

            – gregm
            Nov 26 '18 at 0:57





















          • Hey thanks for the feedback, and I did try your method of setting rotate on the whole scene itself. I'm actually not orienting a marker though; I'm setting up an AR compass edit: it's late and perhaps I spoke too soon. I think it may have something to do with how I'm getting compass reading though

            – gregm
            Nov 26 '18 at 0:57



















          Hey thanks for the feedback, and I did try your method of setting rotate on the whole scene itself. I'm actually not orienting a marker though; I'm setting up an AR compass edit: it's late and perhaps I spoke too soon. I think it may have something to do with how I'm getting compass reading though

          – gregm
          Nov 26 '18 at 0:57







          Hey thanks for the feedback, and I did try your method of setting rotate on the whole scene itself. I'm actually not orienting a marker though; I'm setting up an AR compass edit: it's late and perhaps I spoke too soon. I think it may have something to do with how I'm getting compass reading though

          – gregm
          Nov 26 '18 at 0:57






















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