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From: merritt@milton.u.washington.edu (Ethan Merritt)
Newsgroups: comp.sys.sgi
Subject: libsphere - how do I get a sphere into an object?
Message-ID: <10445@milton.u.washington.edu>
Date: 1 Nov 90 23:11:00 GMT
Distribution: comp.sys.sgi
Organization: University of Washington, Seattle
Lines: 36

I have been playing with libsphere on a PI under 3.3.1.  I like it,
but I haven't been able to figure out how to get spheres into a graphics
object.  The example in 4Dgifts/src/sphere doesn't use objects, so that
hasn't helped.

The simple-minded approach:
		makeobj( sphere_object );
		sphdraw( &params[i] );
		closeobj();
produces nothing when the corresponding callobj( sphere_object ) is done.

The library routine sphobj() looks relevent, but the documentation is,
shall we say, terse.  Calling sphobj( sphereobj ) seems to draw a sphere
into sphereobj all right, but always at the origin (I think).  Anyway
preceding the call with a move( x,y,z ) call seems to have no effect.
I.e.:
	sphobj( sphere_object );
	makeobj( spheres );
	for (i = 0; i < nspheres; i++ )
		{
		move( &xyz[i] );
		callobj( sphere_object );
		}
	closeobj();
	callobj( spheres );
doesn't seem to do anything other than pile up spheres on top of each other.

Can anyone enlighten me?

				thanks,
				            Ethan A Merritt
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Dept of Biological Structure                H510 Health Sciences
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