Re: [ccp4bb]: Generating surface figures pt. II

[Tim F <fenn@brandeis.edu>]

***  For details on how to be removed from this list visit the  ***
***          CCP4 home page http://www.ccp4.ac.uk         ***

On Tue, 28 Jan 2003, Ethan Merritt wrote:

> 
> I don't know if there is a similar option in POVSCRIPT, but POVRAY
> itself must surely support similar bounding surfaces?
> 

povscript only has the "slab" option, which isn't particularly useful for
this sort of thing.  But I tossed in a "mapclip" boolean operator in a
newer version of povscript that just ignores triangles (originating from
electron density or grasp maps) with Z axis normals <= 0.0.  So only
triangles pointing *away* from the viewer are considered.  This doesn't
work so well for msms maps, since the triangles may not have the proper
directionality to begin with.  I hope its of some use:

	http://www.brandeis.edu/~fenn/povscript

I made an (admittedly lousy) example on the bottom of the following page:

	http://www.brandeis.edu/~fenn/povscript/eden.html

	Regards,
	Tim F

-- 
---------------------------------------------------------

        Tim Fenn
        fenn@brandeis.edu
        Rosenstiel Basic Medical Sciences Research Center
        Brandeis University, Mail Stop 029
        415 South Street
        Waltham, MA 02454
        Phone:  (781) 736-4942
        FAX:  (781) 736-2405

---------------------------------------------------------