# Help needed in getting this to work in houdini?

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Hi guys,

Another new issue here.

I have this concept and I need to make it work in Houdini, so maybe somebody can give me some pointers.

I have an animated null, a particle instanced with a box in the scene.

when the null move to a certain distance within the box, the box gets attracted and move to the position of the null.

So the concept in programming would be like:

distance between null.tx & particle1.tx = distTX

if (distTX < 10),

{

particle1.tx move to null.tx

}

How do I set this up in Houdini?

i have not done much scripting in H before but I have done mel and python in maya.

Thanks for any help in advance.

cheers,

Ray

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hey Ray.

You can create an attribute on your particles that calculate the distance of your particles to the null. You can use the expression: distance(float1a,float2a,float3a,float1b,float2b,float3b) a is the particles xyz-position and b is the nulls position. then you can put all the particles that have a greater distance of 10 into a group.

http://www.sidefx.com/index.php?option=com...&Itemid=305

check theese tutorials out and you will have good understanding of how expression works in Houdini.

Hope it helped a bit.

Erik

duckling

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hey Ray.

You can create an attribute on your particles that calculate the distance of your particles to the null. You can use the expression: distance(float1a,float2a,float3a,float1b,float2b,float3b) a is the particles xyz-position and b is the nulls position. then you can put all the particles that have a greater distance of 10 into a group.

http://www.sidefx.com/index.php?option=com...&Itemid=305

check theese tutorials out and you will have good understanding of how expression works in Houdini.

Hope it helped a bit.

Erik

duckling

Thanks alot! They helped!

regards,

-Ray

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