Editing ChargeCalculator:Index (section)

==3D Model tab==
'''ACC''' allows a few basic charge visualization options to aid in interpreting the results of the atomic charge calculation.

{| class="wikitable"
 |-
 |'''Atom Grouping'''
 |-
 |''Description:'' Level of resolution at which the 3D model will be built and colored.
 |-
 |''Possible values:'' Atoms (build 3D model based on atomic positions, color based on atomic charges), Residues (build 3D model based on positions of residue centroids, color based on residue charges).
 |}

{| class="wikitable"
 |-
 |'''Display Charges'''
 |-
 |''Description:'' which set of charges will be used for coloring the 3D model.
 |-
 |''Possible values:'' any set of charges available for that molecule.
 |}

{| class="wikitable"
 |-
 |'''Show Differences'''
 |-
 |''Description:'' allow to color the 3D model based on differences in charges from individual charge sets. Each atom or residue is colored according to the difference which results as the value in the set chosen at ''Display Charges'', minus the value in the set chosen at ''Show Differences''.
 |-
 |''Possible values:'' any set of charges available for that molecule, and not chosen at ''Display Charges''.
 |}

{| class="wikitable"
 |-
 |'''Display Mode'''
 |-
 |''Description:'' Type of graphical representation used for building the 3D model.
 |-
 |''Possible values:'' Depend on Atom Grouping. 

For ''Atom Grouping = Atoms'':
*Balls and Sticks - render atoms as spheres and bonds as tubes.
*Surface - surface built as a set of points given by the potential of each atom at that point in space; potential computed as a function of the VDW radius and ''Probe Radius'' parameter.
*Cartoons - render amino acids and nucleotides as cartoons; secondary structure is approximated if not explicit in input file.
*C-&alpha; trace - smooth trace of the molecule backbone based on the position of C-&alpha; atoms.
*VDW spheres - render atoms as spheres with VDW radius.
For ''Atom Grouping = Residues'': 
*Balls and Sticks - render residue centroids as spheres connected in the amino acid sequence by tubes
*Surface - surface built as a set of points given by the potential of each residue at that point in space; potential computed as a function of the ''Probe Radius'' parameter.
 |}

{| class="wikitable"
 |-
 |'''Additional display options for each ''Display Mode'''
 |-
 |''Description:'' Certain ''Display Modes'' allow further tuning of what parts of the model are displayed, and how.
 |-
 |''Possible values:'' Depend on ''Display Mode''.
For ''Display Mode = Balls and sticks'':
*Charge Scaling - Scales the size of the balls (atoms or residue centroids) according to the absolute value of the corresponding (atomic or residue) charge. Possible values: Yes (default), No.
For ''Display Mode = Surface'':
*Probe Radius - determines the shape of the surface. Lower values lead to a more VDW-like surface.
For ''Display Mode = Cartoons'' or ''C-&alpha; trace'':
*Show HET atoms - render atoms annotated as HETATM (typically ligand or cofactor atoms) as ''Balls and Sticks''. Possible values: Yes (default), No.
*Show Waters - render atoms annotated as water (residue names HOH, H2O, WAT) as ''Balls and Sticks''. Possible values: Yes, No (default).
 |}

{| class="wikitable"
 |-
 |'''Display Quality'''
 |-
 |''Description:'' Number of tetrahedrons used to display 3D objects. Finer detail is achieved by using a higher number of tetrahedrons. 
 |-
 |''Possible values:'' Very Low, Low, Medium (default), High, Very High
 |}

{| class="wikitable"
 |-
 |'''Min. Value, Mid. Value, Max. Value'''
 |-
 |''Description:'' Enable in order to adjust lowest/highest limit and middle point of the charge scale. The default is given by the values in each particular set of charges (or of differences in charges).
 |}

{| class="wikitable"
 |-
 |'''Value Gap'''
 |-
 |''Description:'' Further adjustment to the coloring scheme can be achieved by using fewer discrete values of the color scheme. Charges which are similar (absolute difference smaller than ''Value Gap'') are displayed in the same color. This allows to visually emphasize the difference in charge distribution in different areas of the molecule. Emphasis increases with ''Value Gap''.
 |-
 |''Possible values:'' 0.05-1.
 |}