add all numbers in same list

hi all,

the algorithm i am busy with is this:

(solid) --(set frames)--(sections of solid) --(planar surfaces from sections) --(calc.of areas)--(list of areas)--(calc. of total area)

i have two problems;
when i use the PLANAR component, i get one extra surface that i haven't asked for. Any idea why? And how to avoid / fix this ?

Second: how can i add the items within a list to produce an overall number ?

Hope the questions are clear enough, thank everyone for your time for even reading this.
Kostas

Replies to This Discussion

Permalink Reply by Andy Payne on February 3, 2010 at 8:57am

Without seeing the definition, I'm not sure why you would be getting one extra surface. But, you can always cull that surface from the list. You may try to use the Cull Index component.
Also, you should be able to use the Mass Addition component (Scalar/Utility/Mass Addition) to add all the items in a list.
HTH,
Andy

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