I see you can create a shape by moving a cross-section curve along a directrix curve, and thereby generating a mesh. (for instance a circle along a line yields a cylinder)
But I am wondering, can you vary the size of the cross-section as you go along, and thereby have it more bulbous at one end, for instance?
Thank you. I was thinking that the radius factor would have to be plugged into the socket of the profile curve rather than the first curve. And so I was wondering whether you would have to copy an attribute from one curve to another in a complicated way.
But if it's as simple as you say, then I can probably do what I was thinking of relatively easily.
Thank you for your suggested node diagram.
I am coming back after actually trying it.
I want to modulate the curve along its length, so it is bulbous at one end and then tapers off.
My attempts to do that by putting a "Float Curve" node or a "Color Ramp" node in the place of the "Multiply-Add" node in the diagram do not work.
My idea of just what I am controlling seems to be wrong. If I change the curve a little differently, the whole curve disappears.
If you use the Factor output of the Spline Parameter Node, you always get a result from 0 (beginning of Curve) to 1 (end of Curve).
That might be easier to manipulate with Math or other Nodes.
The Length goes from 0 to the length of the Curve (duh).
