Re: meshing triangles

New Message	Reply	Date view	Thread view	Subject view	Author view

John Rohlf (jrohlf++at++tubes)
Mon, 20 Jun 94 10:39:00 PDT

Next message: Chris Tanner: "Re: pfMultiPipe + pfMultiProcess"
Previous message: Jan A. Barglowski: "Data Stream buffering/interpolation..."

>
> REGARDING meshing triangles
> Hi All,
>
> I've found that pfuMeshGSet(3pf) requires the pfGeoSet vertices be in a
> particular order for meshing to occur.
>
> I believe that the vertices must be ordered as described in bgntmesh(3g),
> i.e. [v0,v1,v2], [v3,v2,v1]. pfGeoSet vertices that would mesh with the
> help of swaptmesh(3g) are not meshed by pfuMeshGSet().
>
> Does anyone have a routine to order the vertices within a pfGeoSet so that
> pfuMeshGSet() will actually mesh them?
>

        You can't rearrange the order of vertices without changing
        the front/back orientation of polygons. If you use
        backface culling for improved rendering performance (and you
        should), then you will get dropped polygons if you change
        their orientation.

        pfGeoSets do not use swaptmesh. There are many reasons for
        this; the most pertinent is that OpenGL has abolished
        swaptmesh.

In conclusion, the tmesher does about the best it can
with its current algorithm.

Next message: Chris Tanner: "Re: pfMultiPipe + pfMultiProcess"
Previous message: Jan A. Barglowski: "Data Stream buffering/interpolation..."

New Message	Reply	Date view	Thread view	Subject view	Author view

This archive was generated by hypermail 2.0b2 on Mon Aug 10 1998 - 17:50:21 PDT

This message has been cleansed for anti-spam protection. Replace '++at++' in any mail addresses with the '@' symbol.