Hi All Can anyone help me out here (see attached). I’m using 2.57.1 (32-bit) on Windows. I have a mesh with a deform cage being modified by a shape key and a driver bone. I have dropped the default generator (I need a curve), and edited key frames as shown a simple bezier with two KFs. Bone rotation runs max 0 to min -55 deg (it’s constrained) But I can’t figure out the relationship between the curve Y-value and the final key value. In this case I’ve user y=100 at x=-55. But the output result is a tiny fraction!? Worse. The result seems to change unpredictably as I change the curve. I am unable to find a value that works. I’m clearly missing something. The first pic shows the the pose setup. In the second I have selected the deform mesh in order to check the shape key value (which is waaay too low). Does anyone have any clues? [Where have all my newlines gone!?]
Are you expecting someone to tell you an exact driver equation without access to your blend file ?
I don’t believe Stephen Hawking is a forum member !
Surely the Y-value on the driver graph is fixed on some scale? The Obvious value would be 1.0 = full shape key. But that doesn’t seem to be it.
Here’s my take on driver set up,From what I’ve noticed with setting up drivers Y represents the value of the slider ie only set it to .1 if you want its whole range to be.10 and 1 if you want a slider that goes to 100% now to control the actual percentage of what you want changed this is what the -X and +X values do. That’s how I figure it out with trial and error on the x axis
Could be wrong and backwards but that’s my thoughts on it,
PS you might have more luck if you convert your rotation value to Radians
Confirmed this morning.
X-input scale is in radians. So divide degrees by 57.2958
Y-output scale is unity i.e. 1.0 = 1.0
I’m sure I tried X-radians at one point, but I must have had my Y-scale wrong at the time.
Knowing you have at least ‘one’ of them right helps!
[Who has finally found the ‘use basic editor’ check-box and recovered his newlines!]