PFGS_POLYS problem

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Bruno Rassaerts (brassaer++at++luc.ac.be)
Fri, 10 Jan 1997 10:25:31 +0100

Hi,

I know now the the problem that I had with perfly is caused by a bug in
Performer 2.0 and that this problem is fixed in 2.0.2. But I stumbled on
something else that's weird. In my application I want to draw a polygon
with 5 vertices. The geoset of this polygon looks like this (printed
with pfPrint)

--------
GeoSet: 0x180998e0 {
          Primitive: PFGS_POLYS, NON-INDEXED, pfPrims=1, glPrims=3,
                                verts=5
            Attribute Bindings:
                PFGS_COLOR4=PFGS_OFF PFGS_NORMAL3=PFGS_PER_PRIM
                        PFGS_TEXCOORD2=PFGS_OFF
          Attribute List Pointers:
            PFGS_COORD3: 0x180a5130
            PFGS_COLOR4: 0x0
            PFGS_NORMAL3: 0x180a5450
            PFGS_TEXCOORD2: 0x0
          Attribute Index List Pointers:
            PFGS_COLOR4: 0x0
            PFGS_NORMAL3: 0x0
            PFGS_TEXCOORD2: 0x0
            PFGS_COORD3: 0x0
          Strip Lengths: 5

          Prim Normal 0: NX: 0.000000 NY: -1.000000 NZ: 0.000000
          Coord 0: X: -1.750000 Y: 0.000000 Z: -1.300000
          Coord 1: X: 0.800000 Y: 0.000000 Z: -0.950000
          Coord 2: X: 1.550000 Y: 0.000000 Z: 0.700000
          Coord 3: X: -1.300000 Y: 0.000000 Z: 1.650000
          Coord 4: X: -2.350000 Y: 0.000000 Z: 0.600000

        } GeoSet: 0x180998e0
--------

The problem that Performer draws this polygon with a hole in it. I
attached a small picture (4k) that shows this problem. (Sorry for
putting a binary on the mailing list but is was hard to explain
otherwise) The polygon was highlighted with PFHL_LINES so that you can
see the edges.

Note: I am still using Performer 2.0 on an ONYX RE2 IRIX 6.2

Thanks,

-- 
  //       Bruno Rassaerts - EDM (Expertisecentrum Digitale Media)
 ('>    Wetenschapspark 2 - B-3590 Diepenbeek - Tel: +32-(0)11268411
 /rr         Fax: +32-(0)11269400 - eMail: brassaer++at++luc.ac.be
*\))_               URL: http://www.luc.ac.be/~brassaer/

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