Rotate

Interactively rotate an existing prism using various options

In principle, the rotation of the prism is defined by a vector for the rotation axis and a rotation angle.

The vector of the rotation axis is defined by two points (rotation origin and direction of the rotation axis), whereby the rotation origin can optionally automatically be set to the origin of a coordinate system and thus, only the direction of the rotation axis needs to be defined.

The rotation angle is defined by a base line (from the rotation origin to a definable point) and an angle relative to the base line or, optionally, directly relative to the current position.

The points to be defined can placed either free in space or at arbitrary existing reference, docking or cross section mesh points.

The rotation origin can be defined related to a specific coordinate system (global, local, reference) or be placed at a docking point (of the prism to be rotated).

The direction of the rotation axis can also be defined related to a specific coordinate system (global, local, reference).

In addition, for an easier handling of defining the points, certain degrees of freedom (X,Y,Z) related to the selected coordinate system can be locked.

In detail, there are available the following options during the interactive input in the Property window:

Rotation origin

Select the reference point for defining the origin point of the rotation axis

Global

The reference point is the origin of the global coordinate system and the origin point of the rotation axis is defined relative to it.

Local

The reference point is the origin of the current, local coordinate system of the prism (incl. possible preceding transformations) and the origin point of the rotation axis is defined relative to it.

Reference

The reference point is the origin of the initial coordinate system of the prism after creating (based on GP1, GP2 and the selected orthogonal-transformation) and the origin point of the rotation axis is defined relative to it.

Docking point

The origin point of the rotation axis is directly placed at a selectable docking point of the prism. Note: You can only choose docking points of the objective prism (to be rotated).

As axis [reference]

The origin point of the rotation axis is automatically set to the origin point of the coordinate system selected in Rotation axis (see below) (=reference) and you can directly proceed with defining the second point for defining the direction of the rotation axis (related to the origin point of the respectively selected coordinate system).

Rotation axis

Select the reference point for defining the point for determining the direction of the rotation axis

Global

The reference point is the origin of the global coordinate system and the point for determining the direction of the rotation axis is defined relative to it.

Local

The reference point is the origin of the current, local coordinate system of the prism (incl. possible preceding transformations) and the point for determining the direction of the rotation axis is defined relative to it.

Reference

The reference point is the origin of the initial coordinate system of the prism after creating (based on GP1, GP2 and the selected orthogonal-transformation) and the point for determining the direction of the rotation axis is defined relative to it.

Degrees of freedom

When defining the origin point as well as the direction of the rotation axis, select by the checkboxes which degrees of freedom (X/Y/Z) related to the selected coordinate system (see Rotation origin or rather Rotation axis) should be activated (checkbox ticked) or locked (checkbox unticked) for the interactive definition.

Angle (Align start angle)

Activate this option to define the rotation angle by a base line (from the rotation origin to a definable point) and an angle relative to this base line within the interactive definition. Deactivate this option to the define the angle directly relative to the current position of the prism.

Snapping

Select/Filter which objects should be detected (“snapped”) within the interactive selection

For details about this see Move.

To rotate a prism

1. After selecting the wished prism in the 3D View window, select the tool Rotate from the context menu.
2. Define the origin point of the rotation axis (start position of the vector) by considering and with the help of the respective options explained above in the Property window.

   Note: You can define all or certain coordinates also numerically directly in the input field at the cursor position. Defined coordinates are marked in yellow and remain constant at the respective value during the further interactive input.

3. Define the point for determining the direction of the rotation axis (end position of the vector) by considering and with the help of the respective options explained above in the Property window.
4. Define the angle (depending on the selected option) relative to a selectable base line or directly relative to the current position of the prism.

All performed transformations can be viewed in the list of transformations (to be opened via the context menu of the prism in the project navigation or in the 3D window).