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Cameron Manual
Chapter 11: Drawing Style Control
The user is able to choose from three different drawing styles. These are:
The basic syntax for style control is:
XXXX at1 at2 el1 el2
where XXXX is LINE, BALL or ELLIPSE as required. The user may
specify
atoms eg C1, C2 and/or elements eg C O to be drawn in the XXXX
style.
The user may therefore have all three styles present at any one
time
within the picture. Alternatively the ALL may be used
to
convert the drawing style of all the atoms present to XXXX.
The initial drawing style used is LINE.
The ELLIPSE drawing style is only available if the user has input data that contains information on the temperature factors (isotropic or anisotropic) of the atoms concerned. The ellipse drawing style represents atoms by their thermal ellipsoid. Note that negative eigen values are reset at input to .001* the next largest. If the information available is U[iso] only, a circle is plotted whose radius is scaled according to its value.
These subcommands can be used to specify which atoms are to be affected by the drawing style command.
Several other commands are available in addition to the basic style commands.
[Top] [Index] Manuals generated on Wednesday 8 November 2006
11.1: LINE commands.
There are no extra commands following LINE.
[Top] [Index] Manuals generated on Wednesday 8 November 2006
11.2: BALL commands.
BALL RADII C 0.8 N1 1.1
which will draw all C atoms with a radius of 0.8 angstroms, and
the N1
atom with radius of 1.1 angstroms.
BALL RADII DEFAULT.
BALL RADII COVALENT N
The further subcommand ALL can be used - BALL RADII IONIC ALL - to set all atoms if required.
[Top] [Index] Manuals generated on Wednesday 8 November 2006
11.3: ELLIPSE commands
ELLIPSE may be followed by the sub command TYPE which enables the user to control the type of ellipse used to represent the atom. The syntax is:
ELLIPSE TYPE at/els/all n.
Type 'n' can take any of four values:
1 - bounding ellipse only.
2 - bounding ellipse and principal ellipses.
This is the default representation.
3 - as 2 but excluding the principle axes.
4 - as 2 but with shading.
Note that any use of ELLIPSE TYPE will set all the atoms referred to ellipse type even if they were previously in LINE or BALL. Hence,
ELLIPSE TYPE C 2 will have all carbon atoms drawn in type 2 form. ELLIPSE TYPE ALL 4 will have all atoms drawn in type 4 form
The NEGATIVE sub command requires one argument. If atoms are input with negative temperature factors the atoms temperature factor is reset using the value specified by ELLIPSE NEGATIVE u. The default value of u is 0.01.
This is used to specify the size of the ellipsoid probability envelope displayed. It is followed by a percentage value.
[Introduction | How To Get Started | Data Input | Outputting Data | Editing The Atom List | Obeying Files | Archiving And Retrieving Views | Graphical Output Devices | View Direction Control | Include And Exclude | Drawing Style Control | Connectivity Control | Control Of Colour | Atom Labelling | Other Picture Controlling Commands | Symmetry Input | Crystal Packing Commands | Add And Move - Further Symmetry Related Commands | Distance And Angle Calculations | Information On Data Held Within The Program | Group Definitions | Miscellaneous Commands | How To Stop The Program | Menu Definition File | Some Useful Ideas ]
