point expression and length.

[cloudfx]

Hi all,

I am trying to use point expression to reference a point of a polygon.

I put an add sop and put point("../sphere1",28,"P",1) for pt0x,pt0y,pt0z.

But what I want to do is sphere1 's point number 28's position of x,y, and z through point expression.

And I have attribcreat sop under the add sop, value as "length($TX,$TY,$TZ)" to get the points length from 0,0,0.

Hmm I uploaded hip file, Thanks!;

pointexpression_H91244_001.hip

[eetu]

I put an add sop and put point("../sphere1",28,"P",1) for pt0x,pt0y,pt0z.

You need to put point(,,,0) for x, 1 for y and 2 for z.

And I have attribcreat sop under the add sop, value as "length($TX,$TY,$TZ)" to get the points length from 0,0,0.

You can either get the coords thru point(), or put down a point SOP after the attribCreate and use length($TX,$TY,$TZ) there.

Hm, I'm not exactly sure why it doesn't work the way you tried, AttribCreate does seem to offer $TX etc..

eetu.

pointexpression_H91244_002.hip

[cloudfx]

You need to put point(,,,0) for x, 1 for y and 2 for z.

Yeah, that was what I missed.

It confused me, but I got it now

Thanks a lot