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/*:
 * @target MZ
 * @plugindesc Show Main Actor In Map for RPG MAKER MZ
 * @author lemonhall
 *
 * @command showMainActorInMap
 * @text Show Main Actor In Map
 * @desc Displays the Actor Image In Map
 *
 * @arg url
 * @type string
 * @text URL
 * @desc URL to be loaded in the web viewer.
 * @default https://www.example.com
 *
 *
 * @help
 * Displays the Actor Image In Map, use the plugin command "Show Main Actor In Map" in events.
 */

(() => {
    //这个pluginName必须和文件名是同名的哈
    const pluginName = "ShowMainActorInMap";
    const parameters = PluginManager.parameters(pluginName);

    //这个是插件里的命令名，可以有多个的
    PluginManager.registerCommand(pluginName, "showMainActorInMap", args => {
            //console.log("插件：showMainActorInMap开始运行");
            // Show Picture
            // Game_Interpreter.prototype.command231 = function(params) {
            //     const point = this.picturePoint(params);
            //     // prettier-ignore
                   //[1, "Actor1_8", 0, 0, 0, 100, 100, 255, 0]
                   //实际调用的时候给的参数是这些：
                   //params[0] = 1
                   //params[1] = Actor1_8
                   //params[2] = 0
                   // point.x
                   // point.y
                   //params[6] = 100
                   //params[7] = 100
                   //params[8] = 255
                   //params[9] = 0
                   //猜测的意义是：params[0]代表的是图片的编号，1，pictureId
                   ////params[1] 是图像的文件名了Actor1_8，name
                   //params[2]，原型函数里是origin，这里给的是0，但看了界面没猜出来是啥意思，我改改再试试
                   //[1, "Actor1_8", 1, 0, 0, 100, 100, 255, 0],我试了一下，如果是中心的话，这里就是1
                   //看来这应该是个坐标系的东西，可以再试试，这东西好说
                   //x,y就不说了
                   //scaleX, scaleY, opacity, blendMode
                   //params[6] 对应的就是x的缩放率
                   //params[7] 对应的就是y的缩放率
                   //params[8] 透明度，直接就是255，不透明
                   //params[9] 混合模式，为0
            //     $gameScreen.showPicture(
            //         params[0], params[1], params[2], point.x, point.y,
            //         params[6], params[7], params[8], params[9]
            //     );
            //     return true;
            // };
            // prettier-ignore
            // Game_Screen.prototype.showPicture = function(
            //     pictureId, name, origin, x, y, scaleX, scaleY, opacity, blendMode
            // ) {
            //     const realPictureId = this.realPictureId(pictureId);
            //     const picture = new Game_Picture();
            //     picture.show(name, origin, x, y, scaleX, scaleY, opacity, blendMode);
            //     this._pictures[realPictureId] = picture;
            // };

            // Game_Screen.prototype.picture = function(pictureId) {
            //     const realPictureId = this.realPictureId(pictureId);
            //     return this._pictures[realPictureId];
            // };
            //如果是在战斗场景，就返回一经过了加工的id
            // Game_Screen.prototype.realPictureId = function(pictureId) {
            //     if ($gameParty.inBattle()) {
            //         return pictureId + this.maxPictures();
            //     } else {
            //         return pictureId;
            //     }
            // };

            // Erase Picture
            // // 擦除图片
            // Game_Interpreter.prototype.command235 = function(params) {
            //     console.log("擦除图片入参：",params[0]);  //就是id
            //     $gameScreen.erasePicture(params[0]);
            //     return true;
            // };

            //本插件其实就是给地图增加一个立绘显示效果
            //这样调用，直接报错了，看来这个pictureId是有问题的
            //等于是给$gameScreen的_pictures[72]私有对象上，绑定了一个文件名为：Actor1_8
            //的图像，然后坐标系为0，左上角
            //x坐标为496,y坐标为112
            //x缩放为50%，y缩放为50%
            //不透明度为255
            //混合模式为0
            var actorMainPicX = 496;
            var actorMainPicY = 112;
            var actorMainScaleX = 50;
            var actorMainScaleY = 50;
            var hp = $gameActors.actor(1)._hp;

            //等于说这就是底图
            $gameScreen.showPicture(72, "Actor1_8", 0, 
                                    actorMainPicX, actorMainPicY, 
                                    actorMainScaleX, actorMainScaleY, 
                                    255, 0);
            if(hp<534){
                    //这是第一层，战损效果                        
                    $gameScreen.showPicture(73, "Actor1_8_dirty", 0, 
                                            actorMainPicX, actorMainPicY, 
                                            actorMainScaleX, actorMainScaleY, 
                                            255, 0);
            }
            //这是第一层，战损效果 
            if(hp>534){
                //擦除战损层图片就好了                       
                $gameScreen.erasePicture(73);
            }
            //console.log(name,       origin, x, y,         scaleX, scaleY, opacity, blendMode);
            //            Actor1_8    0       0  0  0       100 100         255
            //console.log($gameScreen);

            //玩家的状态是：$gameActors.actor(1)_hp就能拿到了；

    });

})();

先贴代码

然后说一下效果：