Editing RotationAxis (section)

= Examples =
<source lang="python">
# download the source and save as draw_rotation_axis.py
run draw_rotation_axis.py
fetch 2vak
# calculate rotation axis between chains A and B
draw_axis('chain A', 'chain B')
</source>

<gallery perrow=3 widths=350 heights=350> 
Image:2vak4.png |Rotation axis between chains A and B
Image:2vak2.png |Some basic information is printed in the screen
</gallery>

<source lang="python">
# Another example, calculate the rotation axis of an homodimer
run draw_rotation_axis.py
fetch 3rfg
# calculate rotation axis between chains A and B
draw_axis('chain A', 'chain B')
</source>

<gallery perrow=3 widths=300 heights=300>
Image:3rfg1.png |Rotation axis between chains A and B
Image:3rfg4.png |Some basic information is printed in the screen
</gallery>

<source lang="python">
# Clearly, each of the domains are made up with motifs with internal symmetry
draw_axis('resi 200-236 and chain A', 'resi 238-274 and chain A', 20, 0.6, 1, 0, 0, 1, 0, 0)
# Also, you can create first the selections and use them to calculate the axis
sele selection1, resi 200-236 and chain A
sele selection2, resi 238-274 and chain A
draw_axis('selection1', 'selection2', 20, 0.6, 1, 0, 0, 1, 0, 0)
# will produce the same result.
</source>

<gallery perrow=3 widths=300 heights=300>
Image:3rfg2.png |Internal rotation axis
Image:3rfg3.png |Some basic information is printed in the screen
</gallery>


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