updated json, code for loading and sorting dynamic objects, group and inter group linking

js/Item.js

@@ -43,6 +43,8 @@ export class Item {
         this.links = [];
 
         this._init();
+
+        this.isVisible = true;
     }
 
     _init() {
@@ -148,8 +150,9 @@ export class Item {
     }
 
     _drawBoundingBox() {
-        if (this.isCollider) { 
+        if (this.isCollider && this.isVisible) { 
             // 1. Remove the previous frame's box
+            
             if (this.debugBox) {
                 this.scene.remove(this.debugBox);
                 this.debugBox.geometry.dispose();
@@ -188,6 +191,26 @@ export class Item {
         }
     }
 
+    show() {
+        if (this.object) {
+            this.object.visible = true;
+        }
+        if (this.rb) {
+            this.rb.setEnabled(true);
+        }
+        this.isVisible = true;
+    }
+
+    hide() {
+        if (this.object) {
+            this.object.visible = false;
+        }
+        if (this.rb) {
+            this.rb.setEnabled(false);
+        }
+        this.isVisible = false;
+    }
+
     async _moveActiveObject(delta) {
         if (this.isActive) {
             if (this.rb && !this.rb.isKinematic()) {

js/ItemManager.js

@@ -3,9 +3,13 @@ import { Player } from './Player';
 import { Item } from './Item';
 import { TextContent, ImageContent, VideoContent, AudioContent } from './Content';
 import { GeometryUtils } from 'three/examples/jsm/Addons.js';
+import { Line2 } from 'three/examples/jsm/lines/Line2.js';
+import { LineMaterial } from 'three/examples/jsm/lines/LineMaterial.js';
+import { LineGeometry } from 'three/examples/jsm/lines/LineGeometry.js';
+
 
 export class ItemManager {
-    constructor(filePath, scene, rapierWorld, player, interactableItems) {
+    constructor(filePath, preloadedObjects, dynamicGroups, scene, rapierWorld, player, interactableItems) {
         this.filePath = filePath;
         this.scene = scene;
         this.rapierWorld = rapierWorld;
@@ -17,6 +21,11 @@ export class ItemManager {
         this.unloadDistance = 300;
         this.linkLines = new Map();
         this.drawnLinks = new Set();
+        this.preloadedObjects = preloadedObjects;
+        this.dynamicGroups = dynamicGroups;
+        this.groupCentres = new Map();
+        this.groupCenterLinks = new Map();
+        this.interGroupLinks = new Map();
         this._init();
     }
 
@@ -33,7 +42,9 @@ export class ItemManager {
 
             const data = await resp.json();
             await this._processItemData(data.items);
-            this._createLinkLines();
+            this._createGroupCenterLinks();
+
+            if (data.groupLinks) this._createInterGroupLinks(data.groupLinks);
 
         } catch (error) {
             console.error("Could not load or process content JSON:", error);
@@ -44,6 +55,20 @@ export class ItemManager {
         for (const itemDef of itemArray) {
             let contentObject = null;
 
+            const preloadedObject = this.preloadedObjects.get(itemDef.name);
+
+            if (!preloadedObject) {
+                console.warn(`Could not find a preloaded 3D object for item name: "${itemDef.name}"`);
+                continue;
+            }
+
+            // Find the correct THREE.Group for this item
+            const parentGroup = this.dynamicGroups.get(itemDef.groupId);
+            if (!parentGroup) {
+                console.warn(`Could not find a group for groupId: "${itemDef.groupId}"`);
+                continue;
+            }
+
             // Create content object based on contentType and file
             if (itemDef.contentType && itemDef.file) {
                 switch (itemDef.contentType) {
@@ -77,97 +102,140 @@ export class ItemManager {
                 }
             }
             
-            // Create the Item instance
-            const position = new THREE.Vector3(itemDef.position.x, itemDef.position.y, itemDef.position.z);
-            
-            // The Item constructor expects a single number for scale, which matches your JSON.
-            const scale = itemDef.scale;
-            
             const newItem = new Item(
                 this.rapierWorld,
-                this.scene,
+                parentGroup,
                 this.player,
-                itemDef.isCollider,
-                position,
-                scale,
+                true,
+                preloadedObject.position,
+                1,
                 itemDef.name,
-                itemDef.model,
-                itemDef.texture,
+                null,
+                null,
                 [], // spawnedObjects placeholder
-                contentObject 
+                contentObject,
+                preloadedObject
             );
 
             // Set item id and group id
             newItem.id = itemDef.id;
-            newItem.groupId = itemDef.groupId;
+            newItem.groupId = parentGroup.name;
 
             // Set links
             if (itemDef.links) {
                 newItem.links = itemDef.links;
             }
 
-            if (itemDef.isCollider) {
+            // Item is already loaded from world glb, but this func creates collider etc.
+            await newItem.loadModel();
+            newItem.show();
+
             this.interactableItems.push(newItem);
-            }
 
             // Setting a key and value pair in the Map (id, item)
             this.itemData.set(itemDef.id, newItem);
         }
     }
 
-    _createLinkLines() {
-       
+    _createGroupCenterLinks() {
         this.itemData.forEach(item => {
-            if (!item.links) return;
+            const groupCenter = this._getGroupCentre(item.groupId);
+            if (!groupCenter) return;
 
-            item.links.forEach(linkedItemId => {
-                // Goes through each connection; links = [0, 1, 2..]
-                const linkedItem = this.itemData.get(linkedItemId);
-                if (!linkedItem) return;
+            const material = new THREE.LineBasicMaterial({
+                color: 0xFF0000,
+                transparent: false,
+                opacity: 1
+            });
 
-                if (item.groupId !== linkedItem.groupId) return;
+            const points = [groupCenter.clone(), item.spawnPosition.clone()];
+            const geometry = new THREE.BufferGeometry().setFromPoints(points);
             
-                // Creates a key for the Set; a Set can only have unique values, so used for no overlap
-                const key = [item.id, linkedItemId].sort().join('-');
+            const line = new THREE.Line(geometry, material);
+            line.visible = false; // Initially hidden
 
-                if (this.drawnLinks.has(key)) return;
+            this.scene.add(line);
 
-                const material = new THREE.LineDashedMaterial({
-                    color: 0x0000ff,
-                    dashSize: 3,
-                    gapSize: 1,
+            // Store the line and the group it belongs to, keyed by the item's ID
+            this.groupCenterLinks.set(item.id, { line, groupId: item.groupId });
         });
+    }
 
-                const sourcePos = item.spawnPosition.clone();
-                const terminalPos = linkedItem.spawnPosition.clone();
-                sourcePos.y = 1; terminalPos.y = 1;
+    _createInterGroupLinks(groupLinks) {
+        groupLinks.forEach(linkPair => {
+            const [groupA_ID, groupB_ID] = linkPair;
 
-                const points = [item.spawnPosition.clone(), linkedItem.spawnPosition.clone()];
-                const geometry = new THREE.BufferGeometry().setFromPoints(points);
+            const centerA = this._getGroupCentre(groupA_ID);
+            const centerB = this._getGroupCentre(groupB_ID);
 
-                const line = new THREE.Line(geometry, material);
-                line.computeLineDistances(); 
+            if (!centerA || !centerB) {
+                console.warn(`Could not find centers for group link: ${groupA_ID} to ${groupB_ID}`);
+                return;
+            }
+
+            const lineGeometry = new LineGeometry();
+            lineGeometry.setPositions([
+                centerA.x, centerA.y, centerA.z,
+                centerB.x, centerB.y, centerB.z
+            ]);
+
+            const lineMaterial = new LineMaterial({
+                color: 0xffa500, // Orange color for distinction
+                linewidth: 2, // in pixels
+                resolution: new THREE.Vector2(window.innerWidth, window.innerHeight),
+                fog:true
+            });
 
+            const line = new Line2(lineGeometry, lineMaterial);
             this.scene.add(line);
 
-                // The Set is used as the key "0-1", then the item and the linkedItem are set as values in the Map?
-                this.linkLines.set(key, { line, item1: item, item2: linkedItem });
-                // Make sure it is not drawn again, adding the unique pair here
-                this.drawnLinks.add(key);
+            const linkKey = `${groupA_ID}-${groupB_ID}`;
+            this.interGroupLinks.set(linkKey, { line, groupA_ID, groupB_ID });
         });
+    }
+
+    _getGroupCentre(groupId) {
+        const group = this.dynamicGroups.get(groupId);
+        if (!group) {
+            console.warn(`Group with id ${groupId} not found`);
+            return null;
+        }
+
+        const bbox = new THREE.Box3().setFromObject(group);
+        const centre = new THREE.Vector3();
+        bbox.getCenter(centre);
+
+        return centre;
+    }
+
+    _updateGroupCentres() {
+        this.dynamicGroups.forEach((group, groupId) => {
+            const center = this._getGroupCentre(groupId);
+            if (center) {
+                let helper = this.groupCentres.get(groupId);
+                if (!helper) {
+                    helper = new THREE.AxesHelper(3); // The number defines the size of the helper
+                    this.scene.add(helper);
+                    this.groupCentres.set(groupId, helper);
+                }
+                helper.position.copy(center);
+            }
         });
     }
 
-    _updateLinkLines() {
-        this.linkLines.forEach(link => {
-            const { line, item1, item2 } = link;
+    _updateGroupCenterLinks() {
+        this.groupCenterLinks.forEach((linkData, itemId) => {
+            const { line, groupId } = linkData;
+            const item = this.itemData.get(itemId);
+            
+            if (item && item.isVisible) {
+                const groupCenter = this._getGroupCentre(groupId);
+                if (!groupCenter) return;
 
-            // Only update/show the line if both items are loaded
-            if (item1.loadState === 'loaded' && item2.loadState === 'loaded') {
                 line.visible = true;
                 const positions = line.geometry.attributes.position;
-                positions.setXYZ(0, item1.object.position.x, 1, item1.object.position.z);
-                positions.setXYZ(1, item2.object.position.x, 1, item2.object.position.z);
+                positions.setXYZ(0, groupCenter.x, groupCenter.y, groupCenter.z);
+                positions.setXYZ(1, item.object.position.x, item.object.position.y, item.object.position.z);
                 positions.needsUpdate = true;
             } else {
                 line.visible = false;
@@ -175,6 +243,20 @@ export class ItemManager {
         });
     }
 
+    _updateInterGroupLinks() {
+        this.interGroupLinks.forEach(link => {
+            const centerA = this._getGroupCentre(link.groupA_ID);
+            const centerB = this._getGroupCentre(link.groupB_ID);
+
+            if (centerA && centerB) {
+                link.line.geometry.setPositions([
+                    centerA.x, centerA.y, centerA.z,
+                    centerB.x, centerB.y, centerB.z
+                ]);
+            }
+        });
+    }
+
     update() {
         const playerPosition = this.player.camera.position;
         this.itemData.forEach(item => {
@@ -188,15 +270,78 @@ export class ItemManager {
             }
 
             // Check if item should be loaded
-            if (distance < this.loadDistance && item.loadState === 'unloaded') {
-                item.loadModel();
+            if (distance < this.loadDistance && !item.isVisible) {
+                item.show();
             } 
             // Check if item should be unloaded
-            else if (distance > this.unloadDistance && item.loadState === 'loaded') {
-                item.unloadModel();
+            else if (distance > this.unloadDistance && item.isVisible) {
+                item.hide();
             }
         });
 
-        this._updateLinkLines();
+        this._updateGroupCenterLinks();
+        this._updateGroupCentres();
+        this._updateInterGroupLinks();
     }
+
+    // _createLinkLines() {
+       
+    //     this.itemData.forEach(item => {
+    //         if (!item.links) return;
+
+    //         item.links.forEach(linkedItemId => {
+    //             // Goes through each connection; links = [0, 1, 2..]
+    //             const linkedItem = this.itemData.get(linkedItemId);
+    //             if (!linkedItem) return;
+
+    //             if (item.groupId !== linkedItem.groupId) return;
+
+    //             // Creates a key for the Set; a Set can only have unique values, so used for no overlap
+    //             const key = [item.id, linkedItemId].sort().join('-');
+
+    //             if (this.drawnLinks.has(key)) return;
+
+    //             const material = new THREE.LineDashedMaterial({
+    //                 color: 0xffa500,
+    //                 dashSize: 10,
+    //                 gapSize: 1
+    //             });
+
+    //             const sourcePos = item.spawnPosition.clone();
+    //             const terminalPos = linkedItem.spawnPosition.clone();
+    //             sourcePos.y = 1; terminalPos.y = 1;
+
+    //             const points = [item.spawnPosition.clone(), linkedItem.spawnPosition.clone()];
+    //             const geometry = new THREE.BufferGeometry().setFromPoints(points);
+                
+    //             const line = new THREE.Line(geometry, material);
+    //             line.computeLineDistances(); 
+
+    //             this.scene.add(line);
+
+    //             // The Set is used as the key "0-1", then the item and the linkedItem are set as values in the Map?
+    //             this.linkLines.set(key, { line, item1: item, item2: linkedItem });
+    //             // Make sure it is not drawn again, adding the unique pair here
+    //             this.drawnLinks.add(key);
+    //         });
+    //     });
+    // }
+
+    // _updateLinkLines() {
+    //     this.linkLines.forEach(link => {
+    //         const { line, item1, item2 } = link;
+
+    //         // Only update/show the line if both items are loaded
+    //         if ((item1.loadState === 'loaded' && item2.loadState === 'loaded') 
+    //             && (item1.isVisible && item2.isVisible)) {
+    //             line.visible = true;
+    //             const positions = line.geometry.attributes.position;
+    //             positions.setXYZ(0, item1.object.position.x, 1, item1.object.position.z);
+    //             positions.setXYZ(1, item2.object.position.x, 1, item2.object.position.z);
+    //             positions.needsUpdate = true;
+    //         } else {
+    //             line.visible = false;
+    //         }
+    //     });
+    // }
 }

js/ModelLoader.js

@@ -77,6 +77,52 @@ export class ModelLoader {
         });
     }
 
+    loadDynamicGroups(modelURL, worldScale) {
+        return new Promise((resolve, reject) => {
+            this.gltfLoader.load(modelURL, (gltf) => {
+                const dynamicGroup = gltf.scene.getObjectByName('Dynamic');
+                const groups = [];
+
+                if (dynamicGroup) {
+                    // Iterate over children of 'dynamic', which are the subgroups (e.g., 'reddit')
+                    const subgroups = [...dynamicGroup.children];
+                    subgroups.forEach(subgroup => {
+                        if (subgroup.isGroup || subgroup.isObject3D) { // Treat empties as groups
+                            const groupData = {
+                                name: subgroup.name,
+                                objects: []
+                            };
+
+                            // Iterate over the actual mesh objects within the subgroup
+                            const objects = [...subgroup.children];
+                            objects.forEach(object => {
+                                if (object.isMesh) {
+                                    // 1. Apply world scale
+                                    object.position.multiplyScalar(worldScale);
+                                    object.scale.multiplyScalar(worldScale);
+
+                                    // 2. Detach from original parent and apply material
+                                    gltf.scene.attach(object);
+                                    this._applyCustomMaterial(object);
+                                    
+                                    groupData.objects.push(object);
+                                }
+                            });
+                            groups.push(groupData);
+                        }
+                    });
+                    resolve(groups);
+                } else {
+                    console.warn("Could not find 'dynamic' group in the loaded model.");
+                    resolve([]);
+                }
+            }, undefined, (error) => {
+                console.error('An error happened while loading the dynamic groups:', error);
+                reject(error);
+            });
+        });
+    }
+
     loadDRACOModelURL(modelURL, textureURL, scale) {
         return new Promise((resolve, reject) => {
             const applyMaterial = (object, texture) => {

js/main.js

@@ -27,6 +27,7 @@ let rapierWorld, debugLines, itemManager;
 let debugRapier = false;
 let isPaused = false;
 let floorGridSize = new THREE.Vector2(10, 200);
+const worldScale = 20.0;
 
 let socket;
 const currentPlayers = {};
@@ -89,7 +90,7 @@ async function init() {
   /* Load Items/Content */
   loadWorldModel("models/demo-world-comp.glb");
 
-  itemManager = new ItemManager("json/Items.json", scene, rapierWorld, player, interactableItems);
+  //itemManager = new ItemManager("json/Items.json", scene, rapierWorld, player, interactableItems);
 
   const item = new Item(rapierWorld, scene, player, true, new THREE.Vector3(0, 20, 0), 20, "test", '/models/init.glb', null, spawnedObjects, null);
   await item.loadModel();
@@ -134,6 +135,8 @@ async function init() {
       }
     }
   });
+
+  console.log(scene)
 }
 
 async function animate() {
@@ -352,7 +355,6 @@ function createTiledFloor(gridSize = 20, tileSize = 50) {
 
 async function loadWorldModel(modelUrl) {
   const modelLoader = new ModelLoader();
-  const worldScale = 20.0;
   const staticWorldGroup = new THREE.Group();
   scene.add(staticWorldGroup);
 
@@ -379,6 +381,37 @@ async function loadWorldModel(modelUrl) {
 
     console.log("Finished loading world");
   } catch (error) {
-    console.error("Failed to load world model:", error);
+    console.error("Failed to load static world objects:", error);
+  }
+
+  try {
+    const dynamicGroups = await modelLoader.loadDynamicGroups(modelUrl, worldScale);
+    const preloadedObjectsMap = new Map();
+    const dynamicGroupsMap = new Map();
+
+    dynamicGroups.forEach(groupData => {
+      const threeGroup = new THREE.Group();
+      threeGroup.name = groupData.name;
+      scene.add(threeGroup);
+      dynamicGroupsMap.set(groupData.name, threeGroup);
+
+      groupData.objects.forEach(object => {
+        preloadedObjectsMap.set(object.name, object);
+      });
+    });
+
+    console.log(dynamicGroupsMap);
+
+    itemManager = new ItemManager(
+      "json/Items.json", 
+      preloadedObjectsMap,
+      dynamicGroupsMap, 
+      scene, 
+      rapierWorld, 
+      player, 
+      interactableItems);
+
+  } catch (error) {
+    console.error("Failed to load dynamic world objects:", error);
   }
 }

public/json/Items.json

@@ -2,31 +2,39 @@
     "items": [
         {
             "id": 0,
-            "groupId": "reddit1",
-            "name": "cone",
-            "model": "./models/cone.glb",
-            "texture": null,
+            "groupId": "group_Reddit01",
+            "name": "dyCone1",
             "contentType": "text",
             "file": "./texts/example.md",
-            "isCollider": true,
-            "position": { "x": 100, "y": 1, "z": 0 },
-            "rotation": { "x": 0, "y": 0, "z": 0 },
-            "scale": 5,
             "links": [1]
         },
         {
             "id": 1,
-            "groupId": "reddit",
-            "name": "cone2",
-            "model": "./models/cone.glb",
-            "texture": null,
+            "groupId": "group_Reddit01",
+            "name": "dyCone3",
             "contentType": "image",
             "file": "./images/test.webp",
-            "isCollider": true,
-            "position": { "x": -100, "y": 1, "z": 0 },
-            "rotation": { "x": 0, "y": 0, "z": 0 },
-            "scale": 10,
             "links": [0]
+        },
+        {
+            "id": 2,
+            "groupId": "group_Reddit",
+            "name": "dyCone2",
+            "contentType": "text",
+            "file": "./texts/example.md",
+            "links": [3]
+        },
+        {
+            "id": 3,
+            "groupId": "group_Reddit",
+            "name": "dyCone4",
+            "contentType": "image",
+            "file": "./images/test.webp",
+            "links": [2]
         }
+    ],
+
+    "groupLinks": [
+        ["group_Reddit", "group_Reddit01"]
     ]
 }