Adding Three.js to a LitElement Class












0















I'm learning how to integrate Three.js to Polymer's Lit-Element. My current problem is that I need refer to a div element to append Three's Renderer element. Here's how it is done usually:



box = document.getElementById("box")
box.appendChild(renderer.domElement)


Unfortunately, I am not able find how to refer from the constructor()/firstUpdate() to the div declared in the render function. How would you do that?



Here's my best result for now:
Renderer element off target



Here's the code to get this result:
HTML:



<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>

<box-test></box-test>

<script type="module" src="src/components/box-test.js" crossorigin></script>
</body>
</html>


Javascript:



import { LitElement, html } from '@polymer/lit-element'; 

import * as THREE from 'three/build/three.module';



class BoxTest extends LitElement {

constructor() {
super();
var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera(75, 1, 0.1, 1000);

var renderer = new THREE.WebGLRenderer();
renderer.setSize(300, 300);

//box = document.getElementById("box");
document.body.appendChild(renderer.domElement);



var geometry = new THREE.BoxGeometry(1, 1, 1);
var material = new THREE.MeshBasicMaterial({ color: 0x00ff00, wireframe: true });
var cube = new THREE.Mesh(geometry, material);
scene.add(cube);

camera.position.z = 5;

var animate = function () {
requestAnimationFrame(animate);

cube.rotation.x += 0.01;
cube.rotation.y += 0.01;

renderer.render(scene, camera);
};

animate();
}


render() {
return html`
<style>
#box { border: 1px solid red; height: 310px; width: 310px;}
</style>

<section>
The webgl animation must be in the red box
<div id="box">
</div>

</section>
`
}

}

window.customElements.define('box-test', BoxTest);


Any suggestion will be welcomed.










share|improve this question



























    0















    I'm learning how to integrate Three.js to Polymer's Lit-Element. My current problem is that I need refer to a div element to append Three's Renderer element. Here's how it is done usually:



    box = document.getElementById("box")
    box.appendChild(renderer.domElement)


    Unfortunately, I am not able find how to refer from the constructor()/firstUpdate() to the div declared in the render function. How would you do that?



    Here's my best result for now:
    Renderer element off target



    Here's the code to get this result:
    HTML:



    <!DOCTYPE html>
    <html lang="en">
    <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    </head>
    <body>

    <box-test></box-test>

    <script type="module" src="src/components/box-test.js" crossorigin></script>
    </body>
    </html>


    Javascript:



    import { LitElement, html } from '@polymer/lit-element'; 

    import * as THREE from 'three/build/three.module';



    class BoxTest extends LitElement {

    constructor() {
    super();
    var scene = new THREE.Scene();
    var camera = new THREE.PerspectiveCamera(75, 1, 0.1, 1000);

    var renderer = new THREE.WebGLRenderer();
    renderer.setSize(300, 300);

    //box = document.getElementById("box");
    document.body.appendChild(renderer.domElement);



    var geometry = new THREE.BoxGeometry(1, 1, 1);
    var material = new THREE.MeshBasicMaterial({ color: 0x00ff00, wireframe: true });
    var cube = new THREE.Mesh(geometry, material);
    scene.add(cube);

    camera.position.z = 5;

    var animate = function () {
    requestAnimationFrame(animate);

    cube.rotation.x += 0.01;
    cube.rotation.y += 0.01;

    renderer.render(scene, camera);
    };

    animate();
    }


    render() {
    return html`
    <style>
    #box { border: 1px solid red; height: 310px; width: 310px;}
    </style>

    <section>
    The webgl animation must be in the red box
    <div id="box">
    </div>

    </section>
    `
    }

    }

    window.customElements.define('box-test', BoxTest);


    Any suggestion will be welcomed.










    share|improve this question

























      0












      0








      0








      I'm learning how to integrate Three.js to Polymer's Lit-Element. My current problem is that I need refer to a div element to append Three's Renderer element. Here's how it is done usually:



      box = document.getElementById("box")
      box.appendChild(renderer.domElement)


      Unfortunately, I am not able find how to refer from the constructor()/firstUpdate() to the div declared in the render function. How would you do that?



      Here's my best result for now:
      Renderer element off target



      Here's the code to get this result:
      HTML:



      <!DOCTYPE html>
      <html lang="en">
      <head>
      <meta charset="UTF-8">
      <meta name="viewport" content="width=device-width, initial-scale=1.0">
      <meta http-equiv="X-UA-Compatible" content="ie=edge">
      <title>Document</title>
      </head>
      <body>

      <box-test></box-test>

      <script type="module" src="src/components/box-test.js" crossorigin></script>
      </body>
      </html>


      Javascript:



      import { LitElement, html } from '@polymer/lit-element'; 

      import * as THREE from 'three/build/three.module';



      class BoxTest extends LitElement {

      constructor() {
      super();
      var scene = new THREE.Scene();
      var camera = new THREE.PerspectiveCamera(75, 1, 0.1, 1000);

      var renderer = new THREE.WebGLRenderer();
      renderer.setSize(300, 300);

      //box = document.getElementById("box");
      document.body.appendChild(renderer.domElement);



      var geometry = new THREE.BoxGeometry(1, 1, 1);
      var material = new THREE.MeshBasicMaterial({ color: 0x00ff00, wireframe: true });
      var cube = new THREE.Mesh(geometry, material);
      scene.add(cube);

      camera.position.z = 5;

      var animate = function () {
      requestAnimationFrame(animate);

      cube.rotation.x += 0.01;
      cube.rotation.y += 0.01;

      renderer.render(scene, camera);
      };

      animate();
      }


      render() {
      return html`
      <style>
      #box { border: 1px solid red; height: 310px; width: 310px;}
      </style>

      <section>
      The webgl animation must be in the red box
      <div id="box">
      </div>

      </section>
      `
      }

      }

      window.customElements.define('box-test', BoxTest);


      Any suggestion will be welcomed.










      share|improve this question














      I'm learning how to integrate Three.js to Polymer's Lit-Element. My current problem is that I need refer to a div element to append Three's Renderer element. Here's how it is done usually:



      box = document.getElementById("box")
      box.appendChild(renderer.domElement)


      Unfortunately, I am not able find how to refer from the constructor()/firstUpdate() to the div declared in the render function. How would you do that?



      Here's my best result for now:
      Renderer element off target



      Here's the code to get this result:
      HTML:



      <!DOCTYPE html>
      <html lang="en">
      <head>
      <meta charset="UTF-8">
      <meta name="viewport" content="width=device-width, initial-scale=1.0">
      <meta http-equiv="X-UA-Compatible" content="ie=edge">
      <title>Document</title>
      </head>
      <body>

      <box-test></box-test>

      <script type="module" src="src/components/box-test.js" crossorigin></script>
      </body>
      </html>


      Javascript:



      import { LitElement, html } from '@polymer/lit-element'; 

      import * as THREE from 'three/build/three.module';



      class BoxTest extends LitElement {

      constructor() {
      super();
      var scene = new THREE.Scene();
      var camera = new THREE.PerspectiveCamera(75, 1, 0.1, 1000);

      var renderer = new THREE.WebGLRenderer();
      renderer.setSize(300, 300);

      //box = document.getElementById("box");
      document.body.appendChild(renderer.domElement);



      var geometry = new THREE.BoxGeometry(1, 1, 1);
      var material = new THREE.MeshBasicMaterial({ color: 0x00ff00, wireframe: true });
      var cube = new THREE.Mesh(geometry, material);
      scene.add(cube);

      camera.position.z = 5;

      var animate = function () {
      requestAnimationFrame(animate);

      cube.rotation.x += 0.01;
      cube.rotation.y += 0.01;

      renderer.render(scene, camera);
      };

      animate();
      }


      render() {
      return html`
      <style>
      #box { border: 1px solid red; height: 310px; width: 310px;}
      </style>

      <section>
      The webgl animation must be in the red box
      <div id="box">
      </div>

      </section>
      `
      }

      }

      window.customElements.define('box-test', BoxTest);


      Any suggestion will be welcomed.







      three.js lit-element






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 15 '18 at 7:22









      StudentStudent

      53




      53
























          1 Answer
          1






          active

          oldest

          votes


















          1














          In your constructor function you can keep variables to use in other functions later by set it to this



          this.renderer = renderer


          Then in firstUpdated function you can do



          firstUpdated () {
          let box = this.shadowRoot.getElementById('box')
          box.appendChild(this.renderer.domElement)
          }


          Example Code:





          <script type='module'>
          import { LitElement, html } from '@polymer/lit-element'
          import * as THREE from 'three/build/three.module'

          class BoxTest extends LitElement {
          constructor () {
          super()

          var scene = new THREE.Scene()
          var camera = new THREE.PerspectiveCamera(75, 1, 0.1, 1000)
          var geometry = new THREE.BoxGeometry(1, 1, 1)
          var material = new THREE.MeshBasicMaterial({ color: 0x00ff00, wireframe: true })
          var cube = new THREE.Mesh(geometry, material)

          scene.add(cube)
          camera.position.z = 5

          ;(function animate () {
          requestAnimationFrame(animate)
          cube.rotation.x += 0.01
          cube.rotation.y += 0.01
          renderer.render(scene, camera)
          }())

          var renderer = new THREE.WebGLRenderer()
          renderer.setSize(300, 300)
          this.renderer = renderer
          }

          firstUpdated () {
          let box = this.shadowRoot.getElementById('box')
          box.appendChild(this.renderer.domElement)
          }

          render () {
          return html`
          <style>
          #box { border: 1px solid red; height: 310px; width: 310px;}
          </style>

          <section>
          The webgl animation must be in the red box
          <div id="box"></div>
          </section>
          `
          }
          }

          window.customElements.define('box-test', BoxTest)
          </script>





          share|improve this answer
























          • Thank you! Since Saturday I'm with this... Now I understand better how to use constructor() vs firstUpdated() and "this.shadowRoot". I'll search that way before asking a question. Have a nice day!

            – Student
            Nov 15 '18 at 12:34











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          1 Answer
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          1 Answer
          1






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes









          1














          In your constructor function you can keep variables to use in other functions later by set it to this



          this.renderer = renderer


          Then in firstUpdated function you can do



          firstUpdated () {
          let box = this.shadowRoot.getElementById('box')
          box.appendChild(this.renderer.domElement)
          }


          Example Code:





          <script type='module'>
          import { LitElement, html } from '@polymer/lit-element'
          import * as THREE from 'three/build/three.module'

          class BoxTest extends LitElement {
          constructor () {
          super()

          var scene = new THREE.Scene()
          var camera = new THREE.PerspectiveCamera(75, 1, 0.1, 1000)
          var geometry = new THREE.BoxGeometry(1, 1, 1)
          var material = new THREE.MeshBasicMaterial({ color: 0x00ff00, wireframe: true })
          var cube = new THREE.Mesh(geometry, material)

          scene.add(cube)
          camera.position.z = 5

          ;(function animate () {
          requestAnimationFrame(animate)
          cube.rotation.x += 0.01
          cube.rotation.y += 0.01
          renderer.render(scene, camera)
          }())

          var renderer = new THREE.WebGLRenderer()
          renderer.setSize(300, 300)
          this.renderer = renderer
          }

          firstUpdated () {
          let box = this.shadowRoot.getElementById('box')
          box.appendChild(this.renderer.domElement)
          }

          render () {
          return html`
          <style>
          #box { border: 1px solid red; height: 310px; width: 310px;}
          </style>

          <section>
          The webgl animation must be in the red box
          <div id="box"></div>
          </section>
          `
          }
          }

          window.customElements.define('box-test', BoxTest)
          </script>





          share|improve this answer
























          • Thank you! Since Saturday I'm with this... Now I understand better how to use constructor() vs firstUpdated() and "this.shadowRoot". I'll search that way before asking a question. Have a nice day!

            – Student
            Nov 15 '18 at 12:34
















          1














          In your constructor function you can keep variables to use in other functions later by set it to this



          this.renderer = renderer


          Then in firstUpdated function you can do



          firstUpdated () {
          let box = this.shadowRoot.getElementById('box')
          box.appendChild(this.renderer.domElement)
          }


          Example Code:





          <script type='module'>
          import { LitElement, html } from '@polymer/lit-element'
          import * as THREE from 'three/build/three.module'

          class BoxTest extends LitElement {
          constructor () {
          super()

          var scene = new THREE.Scene()
          var camera = new THREE.PerspectiveCamera(75, 1, 0.1, 1000)
          var geometry = new THREE.BoxGeometry(1, 1, 1)
          var material = new THREE.MeshBasicMaterial({ color: 0x00ff00, wireframe: true })
          var cube = new THREE.Mesh(geometry, material)

          scene.add(cube)
          camera.position.z = 5

          ;(function animate () {
          requestAnimationFrame(animate)
          cube.rotation.x += 0.01
          cube.rotation.y += 0.01
          renderer.render(scene, camera)
          }())

          var renderer = new THREE.WebGLRenderer()
          renderer.setSize(300, 300)
          this.renderer = renderer
          }

          firstUpdated () {
          let box = this.shadowRoot.getElementById('box')
          box.appendChild(this.renderer.domElement)
          }

          render () {
          return html`
          <style>
          #box { border: 1px solid red; height: 310px; width: 310px;}
          </style>

          <section>
          The webgl animation must be in the red box
          <div id="box"></div>
          </section>
          `
          }
          }

          window.customElements.define('box-test', BoxTest)
          </script>





          share|improve this answer
























          • Thank you! Since Saturday I'm with this... Now I understand better how to use constructor() vs firstUpdated() and "this.shadowRoot". I'll search that way before asking a question. Have a nice day!

            – Student
            Nov 15 '18 at 12:34














          1












          1








          1







          In your constructor function you can keep variables to use in other functions later by set it to this



          this.renderer = renderer


          Then in firstUpdated function you can do



          firstUpdated () {
          let box = this.shadowRoot.getElementById('box')
          box.appendChild(this.renderer.domElement)
          }


          Example Code:





          <script type='module'>
          import { LitElement, html } from '@polymer/lit-element'
          import * as THREE from 'three/build/three.module'

          class BoxTest extends LitElement {
          constructor () {
          super()

          var scene = new THREE.Scene()
          var camera = new THREE.PerspectiveCamera(75, 1, 0.1, 1000)
          var geometry = new THREE.BoxGeometry(1, 1, 1)
          var material = new THREE.MeshBasicMaterial({ color: 0x00ff00, wireframe: true })
          var cube = new THREE.Mesh(geometry, material)

          scene.add(cube)
          camera.position.z = 5

          ;(function animate () {
          requestAnimationFrame(animate)
          cube.rotation.x += 0.01
          cube.rotation.y += 0.01
          renderer.render(scene, camera)
          }())

          var renderer = new THREE.WebGLRenderer()
          renderer.setSize(300, 300)
          this.renderer = renderer
          }

          firstUpdated () {
          let box = this.shadowRoot.getElementById('box')
          box.appendChild(this.renderer.domElement)
          }

          render () {
          return html`
          <style>
          #box { border: 1px solid red; height: 310px; width: 310px;}
          </style>

          <section>
          The webgl animation must be in the red box
          <div id="box"></div>
          </section>
          `
          }
          }

          window.customElements.define('box-test', BoxTest)
          </script>





          share|improve this answer













          In your constructor function you can keep variables to use in other functions later by set it to this



          this.renderer = renderer


          Then in firstUpdated function you can do



          firstUpdated () {
          let box = this.shadowRoot.getElementById('box')
          box.appendChild(this.renderer.domElement)
          }


          Example Code:





          <script type='module'>
          import { LitElement, html } from '@polymer/lit-element'
          import * as THREE from 'three/build/three.module'

          class BoxTest extends LitElement {
          constructor () {
          super()

          var scene = new THREE.Scene()
          var camera = new THREE.PerspectiveCamera(75, 1, 0.1, 1000)
          var geometry = new THREE.BoxGeometry(1, 1, 1)
          var material = new THREE.MeshBasicMaterial({ color: 0x00ff00, wireframe: true })
          var cube = new THREE.Mesh(geometry, material)

          scene.add(cube)
          camera.position.z = 5

          ;(function animate () {
          requestAnimationFrame(animate)
          cube.rotation.x += 0.01
          cube.rotation.y += 0.01
          renderer.render(scene, camera)
          }())

          var renderer = new THREE.WebGLRenderer()
          renderer.setSize(300, 300)
          this.renderer = renderer
          }

          firstUpdated () {
          let box = this.shadowRoot.getElementById('box')
          box.appendChild(this.renderer.domElement)
          }

          render () {
          return html`
          <style>
          #box { border: 1px solid red; height: 310px; width: 310px;}
          </style>

          <section>
          The webgl animation must be in the red box
          <div id="box"></div>
          </section>
          `
          }
          }

          window.customElements.define('box-test', BoxTest)
          </script>






          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Nov 15 '18 at 8:38









          User 28User 28

          679513




          679513













          • Thank you! Since Saturday I'm with this... Now I understand better how to use constructor() vs firstUpdated() and "this.shadowRoot". I'll search that way before asking a question. Have a nice day!

            – Student
            Nov 15 '18 at 12:34



















          • Thank you! Since Saturday I'm with this... Now I understand better how to use constructor() vs firstUpdated() and "this.shadowRoot". I'll search that way before asking a question. Have a nice day!

            – Student
            Nov 15 '18 at 12:34

















          Thank you! Since Saturday I'm with this... Now I understand better how to use constructor() vs firstUpdated() and "this.shadowRoot". I'll search that way before asking a question. Have a nice day!

          – Student
          Nov 15 '18 at 12:34





          Thank you! Since Saturday I'm with this... Now I understand better how to use constructor() vs firstUpdated() and "this.shadowRoot". I'll search that way before asking a question. Have a nice day!

          – Student
          Nov 15 '18 at 12:34




















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