Minor improvements: clipping, state management

Warning: potentially very buggy!!

config.js

@@ -22,13 +22,6 @@ export const config = {
     scene : {
         initialExposure: 0.7,
         autoLP: true,
-        clipping: {
-            defaultPoint: [
-                -20.3,
-                7.3,
-                -18.3
-            ],
-        }
     },
     menu : {
         audioBtn1

js/map.js

@@ -26,7 +26,6 @@ Map.init = function(mapContainerId) {
     //const markerIcon = L.divIcon({className: 'bi bi-bank text-large'});
 
     config.markers.forEach(marker => {
-        debugger;
         const popup = this.domParser.parseFromString(marker.popup, 'text/html')
             .querySelector('div');
         popup.querySelector('button').onclick = () => {
@@ -37,10 +36,6 @@ Map.init = function(mapContainerId) {
         L.marker(marker.coords,).addTo(map)
             .bindPopup(popup, {autoClose:false, /*closeOnClick:false*/})
             .togglePopup();
-
-        // Update state
-        AppState.scenes.push({id: marker.id, active: false});
-        
     });
 
     AppState.map = map;

js/scene.js

@@ -1,6 +1,6 @@
 // Global ATON
 
-import { AppState, getSceneStatus, setSceneStatus } from "./state.js";
+import { AppState, getSceneStatus, setSceneStatus, getCurrentScene, setCurrentScene } from "./state.js";
 import { config } from "../config.js";
 
 const material = {
@@ -15,6 +15,14 @@ Scene.UI = {};
 
 Scene.UI.domParser = new DOMParser;
 
+/**
+ * Resets the UI state (essentially hides the clipper toolbar if visible...)
+ * @todo Other elements to reset?? Restore inital lighting conditions and viewpoint...
+ */
+Scene.UI.reset = function() {
+    document.querySelector('#clipper-bar')?.classList.add('d-none');
+    document.querySelector('#clipper')?.classList.remove('border', 'border-2', 'border-white');
+}
 /**
  * @todo Get clipping button from state? Review logic!! 
  * @param {String} triggerSelector 
@@ -23,9 +31,13 @@ Scene.UI.domParser = new DOMParser;
 Scene.UI.toggleClipper = function(triggerSelector, targetSelector) {
     const trigger = document.querySelector(triggerSelector);
     const toolbar = document.querySelector(targetSelector);
+
+    if (!AppState.clipping.listenerAdded) {
         trigger.addEventListener(
             'click',
             () => {
+                console.log('Clipping enabled?', AppState.clipping.enabled);
+
                 toolbar.classList.toggle('d-none');
                 const aoCurrentState = AppState.ambientOcclusion;
                 if (!AppState.clipping.enabled) {
@@ -83,6 +95,8 @@ Scene.UI.toggleClipper = function(triggerSelector, targetSelector) {
                 }
             }
         );
+        AppState.clipping.listenerAdded = true;
+    }
 }
 
 /**
@@ -105,15 +119,59 @@ Scene.showEdges = function(object) {
 }
 
 /**
- * @param {String} axis - The axis along wich the plane's normal should be directed,
+ * Calculate bounding box for the scene root object
+ * and return it along with its center and size (bad?).
+ * It only uses meshes to prevent "empty" nodes in the scene
+ * from being included in the calculation.
+ */
+Scene.getRootBoundingBox = function() {
+    const meshes = [];
+    AppState.root.traverse(obj => {
+        if (obj.isMesh) meshes.push(obj);
+    });
+
+    if (meshes.length === 0) return null;
+
+    const bbox = new THREE.Box3().setFromObject(meshes[0]);
+    for (let i = 1; i < meshes.length; i++) {
+        bbox.union(new THREE.Box3().setFromObject(meshes[i]));
+    }
+
+    const center = bbox.getCenter(new THREE.Vector3());
+    const size = bbox.getSize(new THREE.Vector3());
+
+    return { bbox, center, size };
+}
+
+/**
+ * 
+ * @param {THREE.Vector3} rootBBoxSize - The size of the bounding box for the root object
+ * @returns {THREE.Mesh}
+ */
+Scene.createClippingPlaneMesh = function(rootBBoxSize) {
+    const averageDim = (Number(rootBBoxSize.x) + Number(rootBBoxSize.y) + Number(rootBBoxSize.z)) / 3;
+    const planeSize = averageDim * 1.2;
+    const mesh = new THREE.Mesh(
+        new THREE.PlaneGeometry(planeSize, planeSize),
+        new THREE.MeshBasicMaterial({ color: 0xffff00, opacity: 0.1, side: THREE.DoubleSide, transparent: true })
+    );
+
+    return mesh;
+}
+
+/**
+ * @param {String} axis - The axis along which the plane's normal should be directed,
  *                        one of 'x', 'y', 'z'
  * @param {Number} orientation - Positive (1) or negative (-1) orientation on the axis
  */
 Scene.addClippingPlane = function(axis, orientation = -1) {
     axis = axis.toLowerCase();
-    const defaultPoint = new THREE.Vector3(
+    const bboxData = AppState.clipping.rootBoundingBox ?? this.getRootBoundingBox();
-        ...config.scene.clipping.defaultPoint
+
-    );
+    if (!bboxData) return;
+
+    const defaultPoint = bboxData.center.clone();
+
     const vector = [
         axis === 'x' ? orientation : 0,
         axis === 'y' ? orientation : 0,
@@ -121,7 +179,7 @@ Scene.addClippingPlane = function(axis, orientation = -1) {
     ];
 
     // First, add a default clipping plane
-    // at a predefined point (bad?)
+    // at a default point (calculated...)
     Scene.activateClipper(vector, defaultPoint);
     console.log(vector, defaultPoint);
 
@@ -140,6 +198,7 @@ Scene.addClippingPlane = function(axis, orientation = -1) {
  */
 Scene.activateClipper = function(vector, point = null) {
     point ??= ATON.getSceneQueriedPoint();
+    const bboxData = AppState.clipping.rootBoundingBox ?? this.getRootBoundingBox();
 
     if (point) {
         console.log('Queried point:', point);
@@ -147,13 +206,17 @@ Scene.activateClipper = function(vector, point = null) {
         // First remove any existing clipping planes
         ATON.disableClipPlanes();
         // Normal of the clipping plane along the Y axis facing down
-        const plane = ATON.addClipPlane(new THREE.Vector3(...vector), point);
+        const normal = new THREE.Vector3(...vector).normalize();
+        //const constant = -normal.dot(point);
+        const plane = ATON.addClipPlane(normal, point);
         // Add a visible plane helper for the clipping plane
-        const helper = new THREE.PlaneHelper(plane, 24, 0xffff00);
+        const visiblePlane = Scene.createClippingPlaneMesh(bboxData.size);
+        visiblePlane.position.copy(point);
+        visiblePlane.lookAt(point.clone().add(normal));
         // Remove any already visbile helper plane
         if (AppState.clipping.helper !== null) AppState.root.remove(AppState.clipping.helper);
-        AppState.root.add(helper);
+        AppState.root.add(visiblePlane);
-        AppState.clipping.helper = helper;
+        AppState.clipping.helper = visiblePlane;
         console.log("I'm clipping, baby!");
     }
 }
@@ -322,17 +385,29 @@ Scene.init = function() {
 
 }
 /**
- * @param {String} id - The back-to-map button id
+ * @param {String} btnId - The back-to-map button id
  */
-Scene.toggleScene = function(id) {
+Scene.toggleScene = function(btnId) {
-    const btn = document.querySelector(`#${id}`);
+    const btn = document.querySelector(`#${btnId}`);
     const scene = document.querySelector('#scene');
 
     btn.addEventListener('click', () => {
+        const currentScene = getCurrentScene();
+        // Deactivate the current scene before toggling
+        setSceneStatus(currentScene.id, false);
         scene.classList.toggle('d-none');
         // Pause rendering the 3D scene to free resources (hopefully)
         // when browsing the map
         ATON.renderPause();
+        if (AppState.clipping.enabled) {
+            ATON.disableClipPlanes();
+            AppState.clipping.enabled = false;
+            Scene.UI.reset();
+            AppState.root.remove(AppState.clipping.helper);
+            AppState.clipping.helper = null;
+        }
+        AppState.root.setRotation(AppState.initialRotation ?? new THREE.Vector3(0, 1.5, 0));
+
         document.querySelector('#map').classList.toggle('d-none');
         AppState.map.invalidateSize();
     });
@@ -348,8 +423,22 @@ Scene.openScene = function(marker) {
         Scene.init();
     }
 
+    Scene.UI.toggleClipper('#clipper', '#clipper-bar');
+
     scene.classList.toggle('d-none');
     ATON.renderResume();
+    // TODO: reset scene only if changing to a different model from the map
+    // set scene status to inactive, first get current scene id...
+    let currentScene = getCurrentScene();
+    if (currentScene && currentScene.id !== marker.id) {
+        AppState.root.removeChildren();
+        currentScene.current = false;
+    }
+
+    if (!AppState.scenes.find(s => s.id === marker.id)) {
+        const newScene = {id: marker.id, active: false, current: true};
+        AppState.scenes.push(newScene);
+    }
 
     if (!getSceneStatus(marker.id)) {
         // Set scene as active
@@ -358,7 +447,9 @@ Scene.openScene = function(marker) {
         let mainNode = ATON.createSceneNode(marker.label).load(marker.model);
         ATON.setMainPanorama(marker.pano);
         //mainNode.setMaterial(new THREE.MeshPhongMaterial(material));
+        // TODO: hardcoded...
         mainNode.setRotation(0, 1.5, 0)
+        AppState.initialRotation = new THREE.Vector3(0, 1.5, 0);
         Scene.showEdges(mainNode);
 
         mainNode.attachToRoot();
@@ -368,9 +459,10 @@ Scene.openScene = function(marker) {
         Scene.toggleAmbientOcclusion(true);
         AppState.ambientOcclusion = true;
 
-        Scene.UI.toggleClipper('#clipper', '#clipper-bar');
-
         AppState.root = ATON.getRootScene();
+
+        // TODO: set the scene as current!!
+        setCurrentScene(marker.id);
     }
 }
 

js/state.js

@@ -1,6 +1,7 @@
 export const AppState = {
     // The root scene object
     root: null,
+    initialRotation: null,
     scenes : [],
     ambientOcclusion : true,
     shadows : true,
@@ -9,6 +10,8 @@ export const AppState = {
     clipping : {
         enabled: false,
         helper : null,
+        rootBoundingBox: null,
+        listenerAdded: false,
     }
 }
 
@@ -28,5 +31,22 @@ export function getSceneStatus(id) {
  * @returns {Boolean}
  */
 export function setSceneStatus(id, status) {
-    return AppState.scenes.find(s => s.id === id).active = status;
+    AppState.scenes.find(s => s.id === id).active = status;
+}
+
+export function getCurrentScene() {
+    return AppState.scenes.find(s => s.current);
+}
+
+/**
+ * 
+ * @param {String} id The scene's id
+ * @returns 
+ */
+export function setCurrentScene(id) {
+    // First set the correct status for the other scenes
+    let otherScenes = AppState.scenes.filter(s => s.id !== id);
+    otherScenes.forEach(scene => scene.current = false)
+        
+    AppState.scenes.find(s => s.id === id).current = true;
 }