how to set a point in Grasshopper

hi all,

i'd like to know how to place a point in Grasshopper to the 3D center, (meaning: x,y,z = 0) of my Rhino 3D scene to work with in Grasshopper as the origin point/object for arays, etc. ?

Thanks for all help :)

timo

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Replies to This Discussion

Permalink Reply by Luis Fraguada on August 29, 2009 at 2:19pm

Vector > point > pointXYZ

Permalink Reply by Timo on August 29, 2009 at 2:24pm

hhmm,

thank you but also sorry, cause it does not set a point to the origin of my Rhino space.

Does yours?

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Permalink Reply by Luis Fraguada on August 29, 2009 at 2:29pm

The pointXYZ component has 0,0,0 as it's default coordinates. If you do not see a point, go to edit > opengl sprites and see if that helps.

Permalink Reply by Timo on August 29, 2009 at 2:33pm

hmm,
where do you commend me to go?

Permalink Reply by Luis Fraguada on August 29, 2009 at 2:35pm

I meant view> opengl sprites

Permalink Reply by Luis Fraguada on August 29, 2009 at 2:39pm

Being that you svreenshot shows an x for a point, this is prob not your issue. The point xyz component should just by default give you a pt at 0,0,0 in the default xy cplane. If you change the cplane in rhino, the pointXYZ component will still default to the original worldxyplane origin.

Permalink Reply by Timo on August 29, 2009 at 2:41pm

oh ok,

but still,

although all Input values are 0.0, the GH-point sits somewhere undefinable in space:

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Permalink Reply by Luis Fraguada on August 29, 2009 at 2:43pm

Your rhino cplane is in undefinable space

Permalink Reply by Timo on August 29, 2009 at 2:49pm

aha,

so you mean, the GH space origin actually always indicates the origin of Rhino space?

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Permalink Reply by Vicente Soler on August 29, 2009 at 2:48pm

hmmm. i wrote two messages and both got erased. Grasshopper works in world coordinates. As i was saying, grasshopper's main developer once said that cplanes are for suckers (that's what i understood) so you'd have to make your own transformation. work in world coordinates and use the 'orient' component at the end, for example.Also, check the website 'chat'.

Permalink Reply by Timo on August 29, 2009 at 2:55pm

hmm,

well this makes me realize that i actually don't know how to move a point/object in Rhino to the World center,

cause i can't move anything to the same position as the GH-point which has 0,0,0 :(.

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Permalink Reply by Vicente Soler on August 29, 2009 at 2:56pm

Because you're probably working on a modified cplane. Reset the cplane and it will lie on grasshoppers 0,0,0 point.