smesh/doc/salome/gui/SMESH/input/measurements.doc

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\page measurements_page Measurements

Mesh module provides the possibility to perform different measurements
of the selected mesh data.

All measurement operations are available via \b Measurements
top-level menu. Access to the measurements operations is
implemented via a single dialog box, where each operation is represented
as a separate tab page.

\section min_distance_anchor Minimum Distance

This operation allows measuring the distance between two objects.
Currently only node-to-node and node-to-origin operations are
available, but this operation will be extended in the future to support
other mesh objects - elements, meshes, sub-meshes and groups.

To start <b>Minimum Distance</b> operation, select <b>Minimum Distance</b>
item from \b Measurements menu.

\image html min_distance.png

In the dialog box choose the first target and the second target mode by
switching the corresponding radio buttons, then select the objects the distance
between which is to be calculated (or input their IDs directly 
in case of nodes/elements) and press \em Compute button.

The following types of targets are supported:
- \em Node: single mesh node;
- \em Element: single mesh element (not available in this version);
- \em Object: mesh, sub-mesh or group object (not available in this
version);
- \em Origin: origin of the global co-ordinate system.

The result will
be shown in the bottom area of the dialog box. In addition, a simple
preview will be shown in the 3D viewer.

\image html min_distance_preview.png

\section bounding_box_anchor Bounding Box

This operation allows to calculate the bounding box of the selected
object(s).

To start <b>Bounding Box</b> operation, select <b>Bounding Box</b>
item from \b Measurements menu.

\image html bnd_box.png

In the dialog box choose the required type of the object by switching the
corresponding radio button, select the object(s) and press \em Compute button.

The following types of input are available:
- \em Objects: select one or several mesh, sub-mesh or group objects;
- \em Nodes: select a set of mesh nodes;
- \em Elements: select a set of mesh elements.

The result of calculation will be shown in the bottom area of the
dialog box. In addition, a simple preview will be shown in the 3D
viewer.

\image html bnd_box_preview.png

<b>See Also</b> a sample TUI Script of a 
\ref tui_measurements_page "Measurement operations".

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