feat(All):Initial

2025-10-04 23:36:07 +08:00
commit 2b4e5d2668
1321 changed files with 415958 additions and 0 deletions
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+import { Raycaster, Mesh, Group, Vector2, Scene, OrthographicCamera,Color } from "three";
+
+export class PickHelper {
+    private raycaster: Raycaster;
+    private pickedObject: Mesh | Group | undefined;
+    private objects: Mesh[];
+    private camera: OrthographicCamera;
+    private scene: Scene;
+    private bloomLayer: number;
+    private pickedColor =  new Color("#63E2B7");
+    private lastPickedColor =  null;
+
+    constructor(scene: Scene, camera: OrthographicCamera, bloomLayer: number) {
+        this.camera = camera;
+        this.scene = scene;
+
+        this.bloomLayer = bloomLayer;
+
+        this.raycaster = new Raycaster();
+
+        this.objects = [];
+
+        this.scene.traverseVisible(child => {
+            if (child.children.length == 0) {
+                this.objects.push(<Mesh>child);
+            }
+        });
+    }
+
+    pick(normalizedPosition: Vector2,) {
+        // 透过截锥投射一道光线
+        this.raycaster.setFromCamera(normalizedPosition, this.camera);
+        // 获取射线相交的物体列表
+        const intersectedObjects = this.raycaster.intersectObjects(this.objects, false);
+        if (intersectedObjects.length) {
+            // 选择第一个对象。这是最近的一个
+            this.select(intersectedObjects[0].object as Mesh);
+        }
+    }
+
+    select(object: Mesh | Group) {
+        if (!object || object.uuid === this.pickedObject?.uuid) return;
+
+        // 如果有被选中的物体，则恢复
+        if (this.pickedObject) {
+            this.pickedObject.layers.toggle(this.bloomLayer);
+
+            if(this.pickedObject.material && this.lastPickedColor){
+                this.pickedObject.material.color = this.lastPickedColor;
+                this.lastPickedColor = null;
+            }
+
+            this.pickedObject = undefined;
+        }
+
+        this.pickedObject = object;
+        this.pickedObject.layers.toggle(this.bloomLayer);
+
+        if(this.pickedObject.material){
+            this.lastPickedColor = this.pickedObject.material.color;
+            this.pickedObject.material.color = this.pickedColor;
+        }
+    }
+}