I know you can get uv space to world space, but is there a way to trace backwards?

if I have vector3 position on the model surface I want to find out where is it in the UV coord?

Thanks

you can use Ray SOP in Minimum Distance mode and import uv attribute

or you can use xyzdist() followed by primuv() VEX functions to get coordinates on the closest surface and interpolate uv attribute at that location, essentially the same as Ray SOP above does

Hi,

Here is an example:





Lookup UV :

tamte
you can use Ray SOP in Minimum Distance mode and import uv attribute

or you can use xyzdist() followed by primuv() VEX functions to get coordinates on the closest surface and interpolate uv attribute at that location, essentially the same as Ray SOP above does

Thanks I will try it out....

animatrix_
Hi,

Here is an example:





Lookup UV :

int hitprim = -1;
vector hituv = 0;
xyzdist ( 1, @P, hitprim, hituv );

i@hitprim = hitprim;
v@hituv = hituv;

vector p = primuv ( 2, "P", hitprim, hituv );
@P = p;

super cool !! thanks
I will try it