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- ----- Transcript of session follows -----
- Connected to YALE.EDU:
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- From: podlipec@pobox (Mark Podlipec)
- Message-Id: <9403241447.AA14329@pobox.wellfleet>
- Subject: Re: Negative Blobs
- To: rayshade@cs.yale.edu
- Date: Thu, 24 Mar 94 9:54:58 EST
- Cc: mgix@jpn.thomson-di.fr
- Reply-To: podlipec@wellfleet.com
- In-Reply-To: <9403240856.AA17856@krainte.jpn.thomson-di.fr>; from "Emmanuel Mogenet" at Mar 3, 94 2:32 pm
- Organization: Wellfleet Communications Inc.
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-
-
-
- The rayshade enhanced has had negative blobs for a while now. Here's
- the actual code so that it checks against negative radii and strength's
- of zero.
-
- if ( ( (cur->mvec.c0 > -EPSILON) && (cur->mvec.c0 < EPSILON) )
- || (cur->mvec.rs < EPSILON) )
- {
- RLerror(RL_WARN,"Degenerate metaball in blob (sr).\n");
- return (Blob *)NULL;
- };
-
-
- The enhanced verison also supports multicolored blobs(where each
- metaball can be a different color).
-
- I have also written code that supports 4th and 6th degree blobs(the difference
- is comparable between 2nd and 3rd degree splines) and 4th degree
- blobs with a squash vector(pushes the metaball's density so that it's no
- long radial symmetric about the center), but haven't had time to polish it
- yet.
-
- Mark
-
- podlipec@wellfleet.com
-
-
-
-
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