jacksprophet

Is there any way to nest HDAs? Or any other way to accomplish the same thing? Basically, what I am trying to do is something like this:

Konstantin Magnus
You could transfer the height of your side view curve to colors and flatten it.

@Cd = @P.y;
@P.y = 0;

Then let your top view curve shoot rays on the flattened side curve asking for the color to use it as its new height.

vector pos;
vector uv;
intersect(1, @P, {0,0,1}, pos, uv);
@P.y = primuv(1, "Cd", 0, uv);

Works like a charm. Big thanks to both of you. Much appreciated.

On a related note, I don't suppose there's a way to visualize the rays sent by intersect, sort like point trails?

I'm trying to make something similar to the Crv2View command in Rhino.

So I have this polygon curve:


And I want to move each point straight down in Y axis to line up with a NURBS curve, like so:


So I need to somehow find out what the Y position is on the NURBS curve at the appropriate X position. Basically I need to translate this pseudo-code into VEX:

foreach(Curve1.point) {
Curve1.point.yposition = getYposition(Curve2, Curve1.point.xposition);
}

Alas, I'm VEX-impaired so any help would be greatly appreciated.

Thanks.