Difficulties with Offset and Plane Normals

Hi there,

I´ve been expiriencing some problems regarding offset in gh.
I have lot (about 16000) of planes in rhino which I want to offset so I link them to a brep-component in gh.
As you can see on the picture below, the normals of the planes all show in the same direction in rhino. But the gh offset result doesnt look that way!

Can anyone tell me how I can get the wanted result (all in one direction)?
Or perhaps seperate the two different directions so I can flip them afterwards?

PS: Same problem with lofting in gh...

Thanks!

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Replies to This Discussion

Permalink Reply by taz on May 28, 2010 at 12:58pm

Are you referencing in your surfaces from Rhino or are you creating them entirely in GH?

You could try using [Flip] to get all your GH surface normals to align to master guide surface...

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Permalink Reply by h8cru on May 28, 2010 at 1:21pm

Hi taz,

all surfaces are created in rhino. And their directions are shown properly as you can see on the left side.
In gh I just assign these surfaces to a brep component where they automatically seem to get different directions and I do not get why!

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Permalink Reply by H. on May 29, 2010 at 5:14am

I don't know why it's not working.

But Try this way.

Offset both direction.

You could get all surfaces with both direction.

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Permalink Reply by Mattias Eriksson on May 29, 2010 at 7:40am

Did you contruct the planes originally from a brep in rhino? In that case you could always pass that brep into GH and use a surface area center point as input to a point on brep and extract the normal from the brep.