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DUMMY

DUMMY is used to setup the coordinates of a dummy point.

We specify a dummy point in terms of point 1 and point 2 ; then a distance d (in Å).

The dummy point will be located by extension of the vector 1-2 at a distance dÅ from point 2.

Note that points 1 and 2 need not be bonded.

The points can be

either

atoms of the search fragment

or

centroids already set up

Dummy points are automatically named Dn with n=1 to 9.

Example

• Select DUMMY

• Select or type items for DUMMY. If necessary reselect DUMMY to
  end input.
  Select CANCEL to cancel command.

• Select atom 5

• 5 appears in the dialogue area and a red + at atom 5 in the fragment.

  Select or type items for DUMMY. If necessary reselect DUMMY to end input.
  Select CANCEL to cancel command.

• Select atom 6

• The red + at atom 5 vanishes.

  Input distance by which vector is to be extended

• Type 1.08 <RETURN>

• In the summary area we now have:

  D1  5  6  1.08

  This line is displayed in red to indicate that it is a SETUP command.

  If INSTRUCTIONS is toggled 'ON' then in the fragment the bond 5-6 is coloured red and a red arrow, labelled D1, indicates the vector to the dummy point D1.

  In the dialogue area we now have the "home" prompt:

  Search for ALL crystal fragments
  OVERLAP of crystal fragments permitted
  Select a menu command or TO-BUILD to return to the BUILD menu.

  The resultant command in the instruction document is:

  SETUP  D1  5  6  1.08

Related Commands

SETUP CENTROID, SETUP PLANE, SETUP VECTOR

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Volume 2 Chapter 3 3D-Constrain Sub-menu PLANE.