Curve Ops Lerp Component

A project I was working on recently could have benefitted from this kind of Curve Ops component. It seems like a practical thing to have, and there are lots of times I found myself wanting some way to do a linear interpolation between two curves. I suspect you could even have the interpolation controlled by a map input. I swear, there's something in the back of my mind saying I've seen someone do something like this with existing components, but I can't remember what it was. If I had a clue about curve scripting, I'd try to do this one myself. If someone thinks of a way to do it, I'd love to hear about it!

Oh. Don't know how I missed it! Thanks, emme!

I had the idea that the Blend Curve Ops was locked in a left-to-right sort of transition. I guess you never stop learning the basics with FF. Thanks for the examples, and someday I'll bug you with my other curve scripting questions. I have not had any luck finding examples to study, and there isn't anything in the scripting APIs for curve scripts. I'd be happy just knowing how to create a Curve Ops style script that controls Start, End, Minimum and Maximum. It'd be handy to pair up with Bezier curves.

Nice!

So, the variable c that's being returned at the end is the modification of the sample curve variable t? Is that the only value you can return for, or is there also the option of returning values for x and y?

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David Roberson wrote: Is that the only value you can return for, or is there also the option of returning values for x and y?

A curve is one-dimensional - in the sense that it is described by only one parameter - so there's only one value to return. That being said, the x/y sample coordinates can be used to return different curve values at different points on the image plane.

So basically the x/y refer to the image coordinates, while t refers to the curve coordinate.

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David Roberson wrote: it did make me wonder if you also had the option of reversing the curve

Sure, to reverse the curve, using 1-t (inverting the curve x-axis) will do the trick.

Here is a basic blend/lerp as a curve script:

Code
function prepare()    balance = get_slider_input(PERCENTAGE) end; function get_sample(x, y, t)    a = get_sample_curve(x, y, t, SOURCE_A)    b = get_sample_curve(x, y, t, SOURCE_B)    v = b * balance + a * (1 - balance)    return v end;