Define UCS
This command enables to create a local coordinate system. It is a similar dialog box to the command Geometric Registration, but here no object is moving. The command allows also editing the position and the aspect of any coordinate system.
Requirements
Without selection, launch the command to create a new coordinate system.
When a coordinate system is selected, the command allows editing the selected object (with a double-click, by a right-click and through the menu CoordSys).
A new coordinate system is automatically displayed in the scene. By default, the new coordinate system is initialized at the place of the world coordinate system.
Change the origin of the coordinate system with the button
(see Define points). You can also use dX, dY and dZ to apply a translation to the X,Y,Z coordinates.Select the axis X, Y or Z corresponding respectively to:
The first axis, which is horizontal and corresponds to the cyan color. The orientation you will give to this axis will always be respected. Click on the button
to modify this axis (see Define normal direction).The second axis, which is vertical and corresponds to the orange color. The orientation you will give to this axis is respected only if (by chance) it is perpendicular with the first. Otherwise, the software will evaluate the best (nearest) axis corresponding to the direction you enter. Click on the button
to modify this axis.The third axis will be determined automatically to make a direct coordinate system X Y Z.
In advanced mode, you can:
change the name of the axes
change the color of the axes by clicking on color button
change the Length of the line and Add arrows at the extremities
Notes
When editing the World Coordinate System, only the aspect can be modified.