View locking with Tgi3D SU Amorph plug-in for Google Sketch Up

View locking patent pending is a central feature of Tgi3D plug-in for Sketch Up.
View locking a vertex constrains the 3D position of that vertex in such a way that the appearance from the locked view is invariant.
That is further edits to the vertex in other views do not affect its position in the locked view.
The movement of the view locked vertex is restricted on a line in other views.
This line is the line that connects the original position of the vertex to the views optic center.
In its simplest usage a vertex is locked from one view and then the vertex is moved to its correct position in other views.

Источник: rutube.ru