Forge Viewer 中的默认导航速度 [英] Default Navigation speed in Forge Viewer

问题描述

如何在 Forge Viewer 中更改默认导航速度?对于我的示例模型，默认设置太快了.我想编写代码，以便在会话期间可以更改速度.

How can the default navigation speed be changed in the Forge Viewer? The default setting is far to fast for my sample models. I should like to write code so that the speed may be changed during a session.

推荐答案

从 viewer3D.js 实现中复制现有导航工具，根据需要修改速度参数或从应用程序动态公开方法，然后进行设置活跃.

Copy an existing navigation tool from the viewer3D.js implementation, modify the speed parameters as you wish or expose methods to do so dynamically from your app, then set it active.

您可以在viewer3D.js中查看OrbitDollyPanTool L#14545的实现

You can check the implementation of OrbitDollyPanTool L#14545 in viewer3D.js

Autodesk.Viewing.OrbitDollyPanTool = function( viewerImpl, viewerApi ){
    var avp = Autodesk.Viewing.Private;
    var _this = this;
    var kScreenEpsilon = 0.001;
    var kEpsilon = 0.00001;
    var kAutoDeltaZ  = 1.5;         // Dolly increment
    var kAutoDeltaXY = 0.01;
    var kAutoScreenXY = 20;
    var kDollyDragScale = 100.0;
    var kDollyPinchScale = 0.5;
    var kOrbitScale = 2.0;

    // ...

该工具的实例化如下(L#40923):

That tool is instantiated as follow (L#40923):

Viewer3D.prototype.createControls = function( ) {
    var self = this;
    var impl = self.impl;

    self.navigation = new av.Navigation(impl.camera);
    self.__initAutoCam(impl);

    self.utilities = new av.ViewingUtilities(impl, self.autocam, self.navigation);
    self.clickHandler = new av.DefaultHandler(impl, self.navigation, self.utilities);
    self.toolController = new av.ToolController(impl, self, self.autocam, self.utilities, self.clickHandler);
    self.toolController.registerTool( new av.GestureHandler(self) );

    self.toolController.registerTool( av.theHotkeyManager );
    self.toolController.activateTool( av.theHotkeyManager.getName() );

    self.registerUniversalHotkeys();

    self.toolController.registerTool( new av.OrbitDollyPanTool(impl, self) );
    self.toolController.activateTool( "gestures" );

    return self.toolController;
}; 

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