Rotate

Menu: View->Rotate

Mouse menu: Rotate

Toolbar:

Rotate trackball

There are various ways to rotate the image in order to view it from different angles. This does not affect the geometry.

Note: Instead of picking twice to begin and end the rotation, hold down the left mouse button and move the cursor.

Rotate trackball

With this option you can rotate the image as if using a trackball device. This means that when you left-click on a point and move the mouse, the geometric point tries to follow the mouse pointer. This can be imagined as a ball over the graphical window which is moved with the mouse.

The left mouse button can be pressed several times to engage and disengage the movement. To cancel this function, use escape (see Escape ).

Rotate screen axes

This option allows a dynamic rotation about the screen axes. Screen axes are defined as:

When entering this command, Z-axis is set by default and moving the mouse to the left or to the right will rotate the geometry around this axis. Clicking the left mouse button changes the axis. To cancel this function, use escape (see Escape ).

Can be changed the axis about which the image in rotated by entering the letters x, y or z in the command line.

To move the geometry by a fixed angle, enter the number of degrees, positive or negative, in the command line.

Rotate object axes

This option allows a dynamic rotation of the object about its own axes. These are displayed in the bottom left-hand corner of the screen.

When entering this command, Z-axis is set by default and moving the mouse to the left or to the right will rotate the geometry around this axis. Clicking the left mouse button changes the axes. To cancel this function, use escape (see Escape ).

Can be changed the axis about which the image in rotated by entering the letters x, y or z in the command line.

To move the geometry by a fixed angle, enter the number of degrees, positive or negative, in the command line.

Rotate center

The default center of rotation is defined as a point approximately in the center of the geometry.

If you wish to change this center point, use this command to enter a point (see Point definition ). This new centre of rotation will be maintained until the next zoom frame (see Zoom ).

In the Contextual mouse menu (the menu which appears when you right-click over the graphical window) the option 'Automatic rotation center' / 'No automatic rotation center' is listed. If this option is active, for each 'Zoom In' / 'Zoom Out' / 'Pan' the point of the geometry or mesh nearest to the center of the screen will be selected as the center of rotation for subsequent rotations. This variable is also present in the Right buttons menu under Utilities -> Variables.

If a new Rotation center is selected, this option is deactivated.

Plane XY (Original)

This option changes the view to the original one, i.e. with the screen at a right angle to the Z-axis and with the X-axis lying horizontally and pointing to the right.

Plane XZ

This option changes the view so that the screen is at a right angle to the Y-axis with the X-axis lying horizontally and pointing to the right.

Plane YZ

This option changes the view so that the screen is at a right angle to the X-axis with the Y-axis lying horizontally and pointing to the right.

Isometric

This option changes the view to isometric one, i.e. with the screen at the viewing direction that the angles between the projection of the x, y, and z axes are all the same.

Rotate points

This option only appears in the Right buttons menu (see USER INTERFACE ).

The new position of the geometry after the rotation can be defined as the direction orthogonal to the screen via a pair of points:

  1. The target point , the point you are looking at.
  1. The viewpoint , the point you are looking from.

Rotate angle

This option only appears in the Right buttons menu (see USER INTERFACE ).

The new position of the geometry after the rotation can be defined as the direction orthogonal to the screen via a pair of angles:

  1. The angle in the plane XY starting from the X-axis.
  1. The elevation angle from the XY plane.

As an example, the initial view (at a right angle to the Z-axis and with the X-axis horizontal) can be obtained with:

rotate angle 270 90