ice - vertex world position

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Old 02 February 2013   #1
ice - vertex world position

Hi all,

How can we get vertex's world position if we have the vertex index?

Thanks,
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Old 02 February 2013   #2
Use the select in Array node with the Pointposition as the input array
 
Old 02 February 2013   #3
Originally Posted by ace63: Use the select in Array node with the Pointposition as the input array


Thanks Leo

Another question:

How can I get data from one object and use those data to set data on other objects.

In my case I get this error:

context mismatch:
input context supported: per object or point of "cube.polymesh"
output context supported: per object or point of "sphere.polymesh"
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Old 02 February 2013   #4
If the two objects are identical as far as mapping contexts go, IE: same topology in the case of geo, you can use the switch context node.
Otherwise you will have to establish the mapping differently, such as with a get closest location/point node (if they have different topologies, or even identical point counts and positions but differently ordered vertices).

I'm also moving this thread to the ICE subforum.
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Old 02 February 2013   #5
If the two objects are identical as far as mapping contexts go, IE: same topology in the case of geo, you can use the switch context node.

Good to know this, thanks.

Otherwise you will have to establish the mapping differently, such as with a get closest location/point node.

Closet point node is good but what if we want to find a vertex world position on a sphere and move a cube to that position?
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Old 02 February 2013   #6
So you have a specific vertex you want to consider?
Why not use a cluster to filter it then if you need human intervention (which you will to identify the specific vertex), so you can set the kine of an object to the filtered pointpositions for the other.

Not that I would do that in ICE to be honest, a cluster constrain would probably be better in most cases, unless you're just finding yourself exercises to familiarize with ICE basics such as contexts, types, and moving between them.
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Old 02 February 2013   #7
unless you're just finding yourself exercises to familiarize with ICE basics such as contexts, types, and moving between them.

Yes, it's definitely the case. As an exercise I wanted to create a rivet like constraint by creating a transform matrix from 3 vertices.
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Old 02 February 2013   #8
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