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Blender实用小技巧(1)——camera定位

2013-12-12 10:54阅读：

http://blog.sina.cn/dpool/blog/u/1289717465

1)之前一直手动调整camera的位置与对准，十分麻烦，今天偶然看到一个自动调整的方法： 在camera的properties panel中添加一个constraint（选track to），设置如下图，添加target（需要跟踪的目标object），并修改camera的方位即可。
Blender实用小技巧(1)——camera定位
2)与上面的方法相辅相成，这是让相机按照固定轨道来移动，有两种方法实现：

Make object/camera follow a path

Basics

In Blender 2.5, the basic steps are as follows:
Method 1:
- Add > Curve > path.
- In edit mode, modify the path as you wish.
- In object mode, select your object/camera first, then shift select the path > CTRL+P > Set parent to: follow path.
- Place the object/camera at the beginning of the path.
- If you move a
long the timeline, you will see that the object now follows the path.
Method 2:
- Add > Curve > path.
- In edit mode, modify the path as you wish.
- In object mode, select your object/camera.
- Object constraints > Add constraint > Relationship: follow path.
- In the Target box, select the path by name.
- Select the path.
- Object data > Path animation (selected) > add animation key frames first for frame 1: right click on Evaluation Time and add keyframe. Go to frame 100, set Evaluation time = 100 and add another key frame.
这个很关键，我理解的Frames是将曲线分成时间片，evaluation time是在对应的时间片followed object所处的位置。

Fine-tuning

In the Path Animation box, you can adjust the number of frames, and add various key frames at different points in the animation, making the object stop/start/accelerate/decelerate as you wish.
You can adjust further the motion of the object along the path by selecting the path and going to the graph editor.
3)还有个最简单的方法，就是直接num 1(网上还有中ctrl+alt+0不过没什么用)然后调整相机的位置。

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