Position
Constraint
位置限制
Basic 基础Position 职位Position Constraint
位置限制
Tip: 提示:This tag only works after 3D features have been generated, i.e., a 3D reconstruction has taken place. 这个标签只有在生成3D 特性之后才能工作,也就是说,3D 重建已经完成
The Position Constraint binds the world origin, for example, to a specific feature (this will be the Object Tracker’s origin if the Object Tracker is used) - the vertex cluster will be positioned accordingly.
位置约束绑定世界原点,例如,一个特定的特征(如果使用对象跟踪器,这将是对象跟踪器的原点)-顶点集群将相应定位。
Use the tag as follows to calibrate (2 methods):
使用如下标签来校准(2种方法) :
- Create the tag for the respective 创建各自的标记Motion Tracker 运动跟踪器 or 或Object Tracker 物体跟踪器 object. A small orange circle will be displayed at the center of the Viewport (always visible when the tag is active). Drag this circle onto the desired Track or feature: 对象。一个小的橙色圆圈将显示在 Viewport 的中心(当标记处于活动状态时始终可见)。将这个圆拖到想要的轨道或特性上:
- Select the 选择Create Position Constraint 创建位置约束 command (main menu: 命令(主菜单:
and click on the desired Track. A Position Constraint tag with a linked Null object that matches the Track will be created automatically. 然后点击所需的轨道。将自动创建一个带有与 Track 匹配的链接 Null 对象的 Position Constraint 标记

The Motion Tracker links the associated Null object in the tag and uses it to define the world origin, for example, by moving the vertex cluster, including the camera, accordingly.
运动跟踪器链接标签中相关的 Null 对象,并使用它来定义世界原点,例如,通过移动顶点集群,包括相应的相机。
创建位置约束
This command creates a Position Constraint tag with a matching linked feature (see previous paragraph).
此命令创建具有匹配链接特性的位置约束标记(参见前面的段落)。