Volume 2 Chapter 4 Display Menus MEASURE ANGLE

Function

This display command is located in the 3D display for each hit.

It allows you to display the angle formed by 2 or 3 geometrical objects.

The geometrical objects can be atoms, centroids, dummy points, vectors or planes.

Ex.

Select ANGL
```
Please select atom 1
```
Select atom N8
```
Please select atom 2
```
Select atom C6
```
Please select atom 3
```
Select atom Br1
```
Angle: N8 - C6 - BR1= 101.654  Degrees
```

When a calculation has been completed the red crosses at the selected atoms are still displayed. Selection of the REFRESH button will cause the red crosses and the display of the calculated value to vanish.

If the first two selected geometrical objects are atoms, centroids or dummy points then you will be prompted for the third atom, as in the above example.

On the other hand, only two prompts will be displayed for vectors and planes.

Thus you can display the angle between:

two vectors
a vector and the normal to a plane
the normals to two planes (the dihedral angle)

Related Commands

MEASURE DIST, MEASURE TORS

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Volume 2 Chapter 4 Display Menus MEASURE DIST .