Finding out the position of a parametric point on a curve?

[oldiesgoodies]

Hi

I would like to be able to get the position of a certain parametric location on a curve. I thought of using the "creep SOP" for this purpose but it would be even better if I can use an expression type of querying.

thanks

[anim]

you can use primuv()

http://www.sidefx.com/docs/houdini11.0/expressions/primuv

primuv(surface_node, prim_num, attrib_name, attrib_index, u, v)

simply use "P" as attrib_name

and in attrib_index 0 or 1 or 2 for x,y,z

[symek]

Hi

I would like to be able to get the position of a certain parametric location on a curve. I thought of using the "creep SOP" for this purpose but it would be even better if I can use an expression type of querying.

thanks

check this:

primuv("/obj/geo1/curve1", 0, "P", 0, 0.5, 0)

or this:

hou.node("/obj/geo1/curve1").geometry().prims()[0].attribValueAt("P",0.5)

cheers,

skk.

EDIT: Tomas, Tomas...

Edited December 23, 2010 by SYmek