【cocos creator】2.4.x实现简单3d功能，点击选中，旋转，材质修改，透明材质

demo下载：（待审核）
https://download.csdn.net/download/K86338236/89527924

const {
    ccclass, property } = cc._decorator;

const enum box_color {
   
    NORMAL = 0,
    DASHED_LINE = 1,//虚线
    TRANSLUCENT = 2,//半透明
}

@ccclass
export default class main extends cc.Component {
   
    @property(cc.Node)
    boxNode: cc.Node = null;
    @property(cc.Node)
    layerNode: cc.Node = null;

    /**层的父节点 */
    @property(cc.Node)
    layerRootNode: cc.Node = null;

    /**点击检测射线 */
    @property(cc.Node)
    touchNode: cc.Node = null;

    /**普通的颜色 */
    @property([cc.Material])
    changeMat: cc.Material[] = [];
    /**普通颜色第二层，半透明用 */
    @property([cc.Material])
    changeMat2: cc.Material[] = [];
    /**选择状态的颜色 */
    @property([cc.Material])
    changeMatChoose: cc.Material[] = [];
    @property([cc.Material])
    changeMatChoose2: cc.Material[] = [];

    /**向左旋转45 */
    @property(cc.Button)
    leftBtn: cc.Button = null;

    /**向右旋转45 */
    @property(cc.Button)
    rightBtn: cc.Button = null;

    /**分离、合起 */
    @property(cc.Button)
    divideBtn: cc.Button = null;

    /**已经修改颜色uid物体 */
    changeUids: string[] = [];

    /**当前分离状态，是否分离 */
    curDivideState: boolean = false;

    /**当前角度 */
    curAngle: number = 0;

    /**是否动作中 */
    isPlay: boolean = false;


    /**当前角度 */
    choose_type: number = 0;

    // onLoad () {}

    start() {
   
        this.setAngle(-15)
        cc.director.getPhysics3DManager().enabled = true;
        this.touchNode.on(cc.Node.EventType.TOUCH_START, this.onTouchStart, this);
        let boxArr = ["1,1|1,2|1,3|2,1|2,2|3,1",