[Sidefx-houdini-list] tracing, raycasting in pointwrangle? VEX
martinuz at gmail.com
Wed Jan 25 10:21:50 EST 2017
I'm trying to determine if a point is near a primitive but only in the
direction of it's negative normal.
so what I thought of using is rayhittest or trace, where you can cast a ray
from a point in a direction and it will return a float with the found
distance (or less than zero if no hit)
but I'm getting a 'undefined function' error when i use the following code
in a pointwrangle.
float raylength = 2.0;
float bias = 1.0;
vector pHit, nHit;
float hitDistance = rayhittest(@P, @N*raylength, pHit, nHit, bias);
so I guess this only works in rendering or shading context?
is there an alternative to use in a pointwrangle?
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