The Definition tab for three-dimensional structures appears as follows.
In a three-dimensional structure, the plane of the cut must have a general definition. In a majority of cases, its only necessary to define one point belonging to the cut plane and a direction of the required normal vector. The plane may also be defined by three points not belonging to a straight line.
You can define points graphically by indicating the right nodes, or textually by providing the coordinates of the points or node numbers in the dialog.
In the case of three-dimensional structures, a cut may be defined in three ways.
- By defining a plane passing through 2 points, parallel to a selected axis of the global coordinate system - Determine the plane parallel to the selected axis of the global coordinate system and the coordinates of two points that belong to the plane. If the cut definition is performed graphically, select an axis and the node through which the cut is made.
- By defining a plane parallel to one of the axis planes and a point - Indicate a plane of the global coordinate system (plane XY, XZ or YZ) to which the cut plane is to be parallel. Determine the distance between the cut plane and the center of the global coordinate system. If the cut definition is performed graphically, select an axis and the node through which the cut is made.
- By defining three points - Define coordinates (either graphically or manually) of three points not co-linear and univocally define the cut plane.
To define a cut for a 3D structure, follow these procedures.
- Select the method of defining the cut.
- Determine the cut parameters.
- Provide the cut with a name.
- Select the color of the cut.
- Click New.
The defined cut will be added to the list of cuts available on the Cuts tab.