添加圆的匀速运动

CirclePath/assets/Scene/helloworld.fire

@@ -41,8 +41,8 @@
     },
     "_scale": {
       "__type__": "cc.Vec3",
-      "x": 0.2735742330551149,
-      "y": 0.2735742330551149,
+      "x": 0.27357423305511475,
+      "y": 0.27357423305511475,
       "z": 1
     },
     "_quat": {
@@ -529,7 +529,7 @@
     "_id": "aefG3hjpNAnaSIWwfrO4A9"
   },
   {
-    "__type__": "a2006XCMehNSpGjCn0Q+KOv",
+    "__type__": "c213f3DKQxMSaAcM7zBkGet",
     "_name": "",
     "_objFlags": 0,
     "node": {
@@ -539,8 +539,8 @@
     "nodePath": {
       "__id__": 10
     },
-    "circle": 50,
-    "speed": 10,
-    "_id": "a8Bcd1Z3VMGqcw+iqBTUqe"
+    "r": 50,
+    "speed": 100,
+    "_id": "93hKGb6pFEdJa4zQYFKozA"
   }
 ]

CirclePath/assets/Script/CircleRun.js

@@ -0,0 +1,75 @@
+cc.Class({
+    extends: cc.Component,
+
+    properties: {
+        nodePath: cc.Node,
+        r: 50,
+        speed: 10,
+    },
+
+    /**
+     * 构造函数,不能在此操作this.node
+     * 只能做变量初始化
+     */
+    ctor() {
+
+    },
+
+    /**
+     * 组件脚本的初始化,可以操作this.node
+     */
+    onLoad() {
+        this.startX = this.r;
+        this.perimeterMax = 2 * this.r * Math.PI;
+        this.speed = this.speed;
+        this.perimeter = 0;
+    },
+
+    /**
+     * 注册事件
+     */
+    registerEvent() {
+    },
+
+    /**
+     * 使用cc.instantiate()创建实例时
+     * 通过getComponent(脚本名称)取得脚本实例
+     * 然后使用init(data)来传递参数
+     * @param {*} data 
+     */
+    init(data) {
+
+    },
+
+    /**
+     * 通常用于初始化一些中间状态的数据
+     */
+    start() {
+
+    },
+
+    /**
+     * 每一帧回调
+     * @param {*} dt 
+     */
+    update(dt) {
+        //长度增长。
+        this.perimeter += dt * this.speed;
+        if (this.perimeter >= this.perimeterMax) {
+            this.perimeter = 0;
+        }
+        //得到弧度
+        let radian = this.perimeter / this.r;
+        console.log('radian=', radian);
+        let x = this.r * Math.cos(radian);
+        let y = this.r * Math.sin(radian);
+        console.log('x=', x, 'y=', y);
+        this.nodePath.setPosition(cc.v2(x, y));
+    },
+
+    /**
+     * 统一回收组件
+     */
+    onDestroy() {
+    }
+});

CirclePath/assets/Script/CircleRun.js.meta

@@ -0,0 +1,9 @@
+{
+  "ver": "1.0.5",
+  "uuid": "c213fdc3-290c-4c49-a01c-33bcc19067ad",
+  "isPlugin": false,
+  "loadPluginInWeb": true,
+  "loadPluginInNative": true,
+  "loadPluginInEditor": false,
+  "subMetas": {}
+}