mcnamami

I am packing 3 values [int x, float y, float curve] and putting them in a (curve mode) function object using "xyc $1 $2 $3"

So if I send an int or float (X value) into the function object it will output an interpolated Y value for that x value.

This is all fine and normal, but is there a way I can use my original 3 values in an expression object to calculate these interpolated values?

I'm guessing I need to use a log or an exp based on the curve value being +/- but I have no idea how to form the expression. I have attached a patch that should have everything needed to try it out if you thing you have an idea what the expression could be.

It seems to be that the dx and dy values should be used somewhere (and if you set the first point to 0 0 0, these are just the values of the second point on the function. I would have thought something like.

Curve factor values from 0 to 1.0 produce an "exponential" curve when increasing in value and values from -1.0 to 0 produce a "logarithmic" curve. The closer to 0 the curve parameter is, the closer the curve is to a straight line, and the farther away the parameter is from 0, the steeper the curve. The mode attribute must be set to 1 (curve mode) for this message to be effective.

This is all fine and normal, but is there a way I can use my original 3 values in an expression object to calculate these interpolated values?
I'm guessing I need to use a log or an exp based on the curve value being +/- but I have no idea how to form the expression. I have attached a patch that should have everything needed to try it out if you thing you have an idea what  the expression could be.

It seems to be that the dx and dy values should be used somewhere (and if you set the first point to 0 0 0, these are just the values of the second point on the function. I would have thought something like.
[myX/dx] * log(curve) * dy

 From the reference:
Curve factor values from 0 to 1.0 produce an "exponential" curve when increasing in value and values from -1.0 to 0 produce a "logarithmic" curve. The closer to 0 the curve parameter is, the closer the curve is to a straight line, and the farther away the parameter is from 0, the steeper the curve. The mode attribute must be set to 1 (curve mode) for this message to be effective.


How to use the Expr object to calculate values of a function object