更新爆炸图例子

src/GeUtils.ts

@@ -1,5 +1,5 @@
 import * as THREE from 'three';
-import { Geometry, Vector, Vector2, Vector3 } from 'three';
+import { Geometry, Vector, Vector2, Vector3, Box3 } from 'three';
 import { Matrix2 } from './Matrix2';
 
 
@@ -168,51 +168,47 @@ export function midPtCir(v1: THREE.Vector3, v2: THREE.Vector3)
     return v1.clone().add(midLine);
 }
 
+/**
+ * 获得Three对象的包围盒.
+ * @param obj 
+ * @param [updateMatrix] 是否应该更新对象矩阵
+ * @returns box 
+ */
 export function GetBox(obj: THREE.Object3D, updateMatrix?: boolean): THREE.Box3
 {
+    let box = new Box3();
     if (updateMatrix) obj.updateMatrixWorld(false);
-    if (obj.hasOwnProperty("geometry"))
+    if (!obj.visible) return box;
+
+    obj.traverse(o =>
     {
-        let geo = obj["geometry"];
-        if (geo instanceof THREE.Geometry || geo instanceof THREE.BufferGeometry)
+        //因为实体Erase时,实体仍然保存在Scene中.
+        if (o.visible === false)
+            return;
+
+        //@ts-ignore
+        let geo = o.geometry as BufferGeometry;
+        if (geo)
         {
             if (!geo.boundingBox)
                 geo.computeBoundingBox();
-            return geo.boundingBox.clone().applyMatrix4(obj.matrixWorld);
+            box.union(geo.boundingBox.clone().applyMatrix4(o.matrixWorld));
         }
-    }
-    else if (obj.children.length > 0)
-    {
-        let box = obj.children.reduce((sumBox, itemObj) =>
-        {
-            let itemBox = GetBox(itemObj);
-            if (itemBox)
-                sumBox.union(itemBox);
-            return sumBox;
-        }, new THREE.Box3())
-        // if (box) box.applyMatrix4(obj.matrixWorld);
+    });
+
     return box;
 }
-    else
-        return null;
-}
 
 export function GetBoxArr(arr: Array<THREE.Object3D>): THREE.Box3
 {
-    if (arr.length == 0)
+    let box = new Box3();
+    for (let o of arr)
     {
-        return null;
+        let b = GetBox(o);
+        if (!b.isEmpty())
+            box.union(b);
     }
-    return arr.map(o =>
-    {
-        return GetBox(o);
-    }).filter(o =>
-    {
-        return o;
-    }).reduce((sumBox: THREE.Box3, objBox: THREE.Box3) =>
-    {
-        return sumBox.union(objBox)
-    }, new THREE.Box3());
+    return box;
 }
 
 export function MoveMatrix(v: THREE.Vector3): THREE.Matrix4

src/ViewSrc/index.ts

@@ -1,9 +1,11 @@
 // import { Color, Face3, MeshBasicMaterial, Object3D, Vector2, Vector3 } from "three";
 // import "./style.css";
-import { data } from "../data";
-import { Viewer } from "../Viewer";
+import { Vector3 } from "three";
 import { CameraControlState } from "../CameraControls";
+import { data } from "../data";
+import { GetBox } from "../GeUtils";
 import { LoadBoard } from "../Utils";
+import { Viewer } from "../Viewer";
 
 let btn = document.createElement("button");
 btn.innerHTML = "载入"
@@ -13,6 +15,10 @@ let btn2 = document.createElement("button");
 btn2.innerHTML = "清理"
 document.body.appendChild(btn2);
 
+let btn3 = document.createElement("button");
+btn3.innerHTML = "爆炸图"
+document.body.appendChild(btn3);
+
 let el = document.createElement("canvas");
 
 el.style.width = "80%";
@@ -39,3 +45,51 @@ btn2.onclick = () =>
 {
     // LoadBoard(view, []);
 }
+
+btn3.onclick = () =>
+{
+    let box = GetBox(view.m_Scene);
+
+    let cen = box.getCenter(new Vector3());
+    let m = [];
+    for (let obj of view.m_Scene.children)
+    {
+        if (obj.userData && obj.userData instanceof Vector3)
+        {
+            let objCen = GetBox(obj).getCenter(new Vector3());
+
+            let v = objCen.clone().sub(cen);
+
+            let zv = obj.userData as Vector3;
+            if (zv instanceof Vector3)
+            {
+                let d = zv.dot(v);
+                // m.set(obj, zv.clone().multiplyScalar(d));
+                m.push([obj, zv.clone().multiplyScalar(d)]);
+            }
+        }
+    }
+
+
+    let count = 0;
+
+    let t = setInterval(() =>
+    {
+        for (let [o, v] of m)
+        {
+            o.position.add(
+                v.clone().multiplyScalar(1.5 / 120)
+            );
+            o.updateMatrix();
+        }
+
+        view.ZoomAll();
+
+        view.m_bNeedUpdate = true;
+
+        count++;
+
+        if (count === 60)
+            clearInterval(t);
+    }, 16)
+}

src/createBoard.ts

@@ -90,7 +90,6 @@ export function createBoard(boardData: object)
     let boardMat = new THREE.Matrix4();
     let matInv: THREE.Matrix4 = new THREE.Matrix4();
     //InitBoardMat
-    {
     let xD = getVec(boardData["XVec"]);
     let yD = getVec(boardData["YVec"]);
     let ZD = getVec(boardData["ZVec"]);
@@ -99,7 +98,6 @@ export function createBoard(boardData: object)
     boardMat.makeBasis(xD, yD, ZD);
     boardMat.setPosition(pBase);
     matInv.getInverse(boardMat, true);
-    }
 
     if (boardPts && boardPts.length !== 0)
         for (let i = 0; i < boardPts.length; i++)
@@ -188,6 +186,8 @@ export function createBoard(boardData: object)
         RotateUVs(ext);
 
     let mesh = new THREE.Mesh(ext, boardMaterial);
+    mesh.userData = ZD;
+    edges.forEach(e => e.userData = ZD);
     return { mesh, edges };
 }