From 720b17f75cec6e8796b1ffde39b34ae01960033d Mon Sep 17 00:00:00 2001
From: Leon van Kammen <leonvankammen@gmail.com>
Date: Thu, 13 Jun 2024 09:20:14 +0000
Subject: [PATCH] feat/model-viewer: work in progress [might break]

---
 example/model-viewer/index.html | 108 ++++++++++++++++++++++----------
 src/3rd/js/three/index.js       |  33 ++++++++++
 src/3rd/js/three/navigator.js   |  29 +--------
 3 files changed, 110 insertions(+), 60 deletions(-)
diff --git a/example/model-viewer/index.html b/example/model-viewer/index.html
index dde2266..25e7d8e 100644
--- a/example/model-viewer/index.html
+++ b/example/model-viewer/index.html
@@ -7,24 +7,32 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
     <link type="text/css" href="./styles.css" rel="stylesheet" />
   </head>
-  <style type="text/css">
-    #url,
-    .btn { display:inline-block;width:40px; height:40px; background:#EEE; font-weight:bold; border-radius:5px; margin-right:5px; text-align:center; line-height:41px; }
-    #url { width:100%; max-width: calc(100% - 140px); text-align:left; padding:0px 10px; font-weight:normal; }
+  <body style="overflow:hidden; padding:10%">
+
+    <h1>&lt;model-viewer&gt; example</h1>
+    <br><br>
 
-  </style>
-  <body style="overflow:hidden">
-    <!-- <model-viewer> HTML element -->
     <model-viewer
       src="https://xrfragment.org/index.glb"
       environment-image="https://cdn.glitch.global/8e507517-31ff-4aa5-80c1-10ea6de9483d/white_furnace.hdr"
-      camera-controls interaction-prompt="none"
-      style="width:100%; height:99vh"
+      interaction-prompt="auto" camera-controls field-of-view="90deg" max-field-of-view="180deg" min-field-of-view="70deg" zoom-sensitivity="0.01" ar
+      style="width:80%; height:50vh"
     >
-      <b class="btn" id="back">&lt;</b>
-      <b class="btn" id="forward">&gt;</b>
-      <input id="url" value=""></b>
+      <div id="navigator">
+        <b class="btn" id="back">&lt;</b>
+        <b class="btn" id="forward">&gt;</b>
+        <input id="url" value=""></b>
+      </div>
+      <style type="text/css">
+        #url,
+        .btn { display:inline-block; cursor:pointer; width:40px; height:40px; background:#EEE; margin-right:5px; text-align:center; line-height:41px }
+        #url { width:100%; max-width: calc(100% - 142px); text-align:left; padding:0px 10px; font-weight:normal; transform: translateY(-2px) }
+        .btn { font-weight:bold; margin-top:10px }
+        #navigator { margin-left:10px; margin-top:10px; } 
+        model-viewer,.btn,#url { border:2px solid #999; border-radius:5px }
+      </style>
     </model-viewer>
+
 		<script type="importmap">
 			{
 				"imports": {
@@ -41,6 +49,8 @@
 			import { USDZLoader } from 'three/addons/loaders/USDZLoader.js';
 			import { OBJLoader } from 'three/addons/loaders/OBJLoader.js';
 
+      console.dir(xrf)
+
       const mv = document.querySelector("model-viewer");
       const $url = document.querySelector('#url')
 
@@ -56,32 +66,66 @@
         } while ((obj = Object.getPrototypeOf(obj)));
       }
 
-      mv.addEventListener("load", () => {
-        const opts = {
-          THREE,
-          scene:    mv[getSymbol('scene')],
-          renderer: mv[getSymbol("renderer")].threeRenderer,
-          controls: mv[getSymbol("controls")],
-          camera:   mv[getSymbol("scene")].getCamera()
-        }
-
-        opts.controls._options.minimumRadius = 1
+      const setCamera = (x,y,z,opts) => {
+        opts.controls._options.minimumRadius = 0
         opts.controls._options.maximumRadius = 100000
-
+        opts.controls._options.maximumFieldOfView = 360
+        console.dir(opts.controls)
         let spherical = opts.controls.goalSpherical
-        spherical.setFromCartesianCoords(0,0,0)
-        opts.controls.moveCamera()
-        opts.control.update = (e) => e
+        spherical.setFromVector3( new THREE.Vector3(x,y,z) ) // setFromCartesianCoords(x,y,z)
+        //spherical.phi = Math.PI / 2; // always look in horizontal direction        
+     //   const direction = new THREE.Vector3();
+     //   direction.setFromSphericalCoords(1, spherical.phi, spherical.theta);
+     //   direction.applyEuler(cameraRotation);
+     //   opts.controls.moveCamera()
+      }
 
-        $url.value     = mv.src
-        window.opts = opts 
+      const opts = { 
+        xrf,
+        THREE,
+      }
+
+      const onLoad = (opts) => function(){
+        const scene    = mv[getSymbol('scene')]
+        const renderer = mv[getSymbol("renderer")].threeRenderer
+        const controls = mv[getSymbol("controls")]
+        const camera   = mv[getSymbol("scene")].getCamera()
+        window.opts    = opts 
+
+        if( camera.parent == null ) scene.add(camera) // xr fragments expects in-scene camera 
 
         // enable XR fragments
-        let XRF = xrf.init({...opts,         
-          loaders: { gltf: GLTFLoader, glb: GLTFLoader, fbx: FBXLoader, obj: OBJLoader, usdz: USDZLoader }
+        let xrf = opts.xrf.init({ 
+          ...opts,
+          scene, 
+          renderer, 
+          camera, 
+          loaders: { gltf: GLTFLoader, glb: GLTFLoader, fbx: FBXLoader, obj: OBJLoader, usdz: USDZLoader },
+          controls
         })
-        console.dir(XRF)
-      });
+        window.xrf = xrf
+
+        xrf.addEventListener('pos', function(opts){
+          setTimeout( () => {
+            setCamera( camera.position.x, camera.position.y, camera.position.z ,{camera,controls})
+          },1)
+        })
+
+        let url    = mv.src
+        $url.value = url
+        // mark current loaded scene for deletion by xrfragment library (except camera)
+        scene.traverse( (o) => o.isXRF = o.id != camera.id )
+        // now we re-insert the model via the XR Fragments lib (so it will parse the XRF metadata)
+        xrf.navigator.to(url)
+        scene.visible = true
+        //xrf.loadModel( scene._currentGLTF, url, false)
+      }
+
+      mv.addEventListener("load", onLoad(opts) )
+      mv.addEventListener('before-render', function(){
+        const scene    = mv[getSymbol('scene')]
+        scene.visible = false
+      })
     </script>
     <!-- Loads <model-viewer> for browsers: -->
     <script
diff --git a/src/3rd/js/three/index.js b/src/3rd/js/three/index.js
index 78527ec..08f2423 100644
--- a/src/3rd/js/three/index.js
+++ b/src/3rd/js/three/index.js
@@ -48,6 +48,39 @@ xrf.parseModel = function(model,url){
   xrf.emit('parseModel',{model,url,file})
 }
 
+xrf.loadModel = function(model,url,noadd){
+  let URI = xrfragment.URI.toAbsolute( xrf.navigator.URI, url )
+  let {directory,file,fragment,fileExt} = URI;
+  model.file = URI.file
+  xrf.model = model 
+
+  if( !model.isXRF ) xrf.parseModel(model,url.replace(directory,"")) // this marks the model as an XRF model
+
+  if(xrf.debug ) model.animations.map( (a) => console.log("anim: "+a.name) )
+
+  // spec: 1. generate the XRWG
+  xrf.XRWG.generate({model,scene:model.scene})
+
+  // spec: 2. init metadata inside model for non-SRC data
+  if( !model.isSRC ){
+    model.scene.traverse( (mesh) => xrf.parseModel.metadataInMesh(mesh,model) )
+  }
+  // spec: 1. execute the default predefined view '#' (if exist) (https://xrfragment.org/#predefined_view)
+  const defaultFragment = xrf.frag.defaultPredefinedViews({model,scene:model.scene})
+  // spec: predefined view(s) & objects-of-interest-in-XRWG from URI (https://xrfragment.org/#predefined_view)
+  let frag = xrf.hashbus.pub( url, model) // and eval URI XR fragments 
+  
+  if( !noadd ) xrf.add( model.scene )
+
+  // only change url when loading *another* file
+  fragment = fragment || defaultFragment || ''
+  xrf.navigator.pushState( URI.external ? URI.URN + URI.file : URI.file, fragment.replace(/^#/,'') )
+  //if( fragment )  xrf.navigator.updateHash(fragment)
+
+  xrf.emit('navigateLoaded',{url,model})
+}
+
+
 xrf.parseModel.metadataInMesh =  (mesh,model) => { 
   if( mesh.userData ){
     let frag = {}
diff --git a/src/3rd/js/three/navigator.js b/src/3rd/js/three/navigator.js
index e8bdc27..81da4d4 100644
--- a/src/3rd/js/three/navigator.js
+++ b/src/3rd/js/three/navigator.js
@@ -70,34 +70,7 @@ xrf.navigator.to = (url,flags,loader,data) => {
 
         loader = loader || new Loader().setPath( URI.URN )
         const onLoad = (model) => {
-
-          model.file = URI.file
-          xrf.model = model 
-
-          if( !model.isXRF ) xrf.parseModel(model,url.replace(directory,"")) // this marks the model as an XRF model
-
-          if(xrf.debug ) model.animations.map( (a) => console.log("anim: "+a.name) )
-
-          // spec: 1. generate the XRWG
-          xrf.XRWG.generate({model,scene:model.scene})
-
-          // spec: 2. init metadata inside model for non-SRC data
-          if( !model.isSRC ){
-            model.scene.traverse( (mesh) => xrf.parseModel.metadataInMesh(mesh,model) )
-          }
-          // spec: 1. execute the default predefined view '#' (if exist) (https://xrfragment.org/#predefined_view)
-          const defaultFragment = xrf.frag.defaultPredefinedViews({model,scene:model.scene})
-          // spec: predefined view(s) & objects-of-interest-in-XRWG from URI (https://xrfragment.org/#predefined_view)
-          let frag = xrf.hashbus.pub( url, model) // and eval URI XR fragments 
-          
-          xrf.add( model.scene )
-
-          // only change url when loading *another* file
-          fragment = fragment || defaultFragment || ''
-          xrf.navigator.pushState( URI.external ? URI.URN + URI.file : URI.file, fragment.replace(/^#/,'') )
-          //if( fragment )  xrf.navigator.updateHash(fragment)
-
-          xrf.emit('navigateLoaded',{url,model})
+          xrf.loadModel(model,url)
           resolve(model)
         }
   
