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Reducing the number of vertices in an isosurface... [message #76090] Wed, 18 May 2011 11:57
George Millward is currently offline  George Millward
Messages: 29
Registered: February 2000
Junior Member
Hi there,

I have some 3D graphics 'blobs' which are created as isosurfaces and
then viewed as idlgrpolygons.
Some of these isosurface get really large and contain too much
'detail'. For instance, right now I have created an isosurface that
has these vertices and connectivity:
OUTVERTS FLOAT = Array[3, 117306]
OUTCONN LONG = Array[939168]

What I want to do is 'reduce' this isosurface, so it consist of less
points..... I could do this by just getting rid of some of the
vertices from OUTVERTS - but what do I do with the OUTCONN ?

There does not appear to be any documentation about what exactly the
OUTCONN array is so it is hard to figure out.

A further point - I was sure that some 'reducing isosurfaces' function
was mentioned in IDL8 - but I can't find it anymore.

Any ideas ?

Cheers

George.

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