compute_rotate_gran.html
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	<H3>compute rotate/gran command
	</H3>
	<P><B>Syntax:</B>
	</P>
	<PRE>compute ID group-ID rotate/gran
	</PRE>
	<UL><LI>ID, group-ID are documented in <A HREF = "compute.html">compute</A> command
	<LI>rotate/gran = style name of this compute command
	</UL>
	<P><B>Examples:</B>
	</P>
	<PRE>compute 1 all rotate/gran
	</PRE>
	<P><B>Description:</B>
	</P>
	<P>Define a computation that calculates the total rotational energy of a
	group of granular atoms.
	</P>
	<P>The rotational energy is calculated as the sum of 1/2 I w^2 over all
	the atoms in the group, where I is the moment of inertia of a
	disk/spherical (2d/3d) particle, and w is its angular velocity.
	</P>
	<P><B>Output info:</B>
	</P>
	<P>The scalar value calculated by this compute is "extensive", meaning it
	it scales with the number of atoms in the simulation.
	</P>
	<P><B>Restrictions:</B> none
	</P>
	<P><B>Related commands:</B> none
	</P>
	<P><B>Default:</B> none
	</P>
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