34. Auto Key键

打开Material Editor，在Opacity field键入value 0。（步骤35）

Figure 35: Setting Opacity

When ‘Auto Key’ is enabled, will the program auto generate a key in frame 0 with the previous value 100 and anew in the current frame with the value typed in.Click the ‘Auto Key’ to disable it again.Move the animation slider to make sure the display is off at frame 0 and fully on at frame 10.

Figure 35. 设置Opacity

当‘Auto Key’可使用时，程序会同时在旧制式frame 0（value 100）和新制式（新键入）中自动运行密钥。再次点击‘Auto Key’可停止运行。移动动画，确定显示位置开启在frame 10，frame 0则关闭。

Figure 36: Display Is On

To add clickable interaction in TurnTool, you will have to create a dummy sphere, which will define the area where mouse click will be detected.Make a Sphere and set the number of Segments to 4 to keep the number of polygons down. TurnTool will still detect mouse clicks on a full sphere.

Adjust the size (radius) and position the sphere over the on button. Rename the sphere to ‘on’ Repeat the process with the other two buttons, one called ‘off’ and one called ‘navigation’. See figure 37.

Figure 36. 启动展示 

在TurnTool中加入可点击的互动，建立一个可定义鼠标点击区域的dummy sphere。建立Sphere，number of Segments设定为4，以确定多边形。TurnTool会用鼠标继续跟踪full sphere。调整半径尺寸，点击on,给sphere定位，重命名sphere。以相同步骤重复另外2个键，‘off’和‘navigation’，见步骤37。

Figure 37: Adding Control Objects For the Buttons. Yes, those are spheres

With all the buttons selected, go to the TurnToolBox and scroll all the way down to the Event rollout and click to open it:Check ‘Mouse Click’ and 'Mouse Enter & Exit' as shown in figure 38.

37. 为按键加入控制对象

选定按键，进入TurnToolBox，将鼠标下拉至Event rollout，点击打开：在Mouse Click‘和'Mouse Enter & Exit'前打勾，如步骤38所示

Figure 38: Setting Up Mouse Events

Scroll to the Miscellaneous rollout and check INVISible > Permanent. This will prevent TurnTool from rendering the buttons (figure 39).

38. 设置Mouse Events

鼠标移动至Miscellaneous rollout，在INVISible > Permanent前打勾，防止TurnTool影响按键（步骤39）

Figure 39: Making the Buttons INVISible

Because you want to control all the animations in the scene yourself, you must disable the automatic playback.Scroll To the 'Scene Display' rollout and remove the check mark from 'Play Default Animation' (figure 40).

39. 隐藏按键

由于您要自己手动控制所有动画，所以必须阻止软件的自动播放功能。光标移至'Scene Display'，在'Play Default Animation'处把勾去掉。

Figure 40: Setting Default Animation Behavior

Export the model.

To create a shadow under the PDA, you need to create a suitable texture.

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