[Bf-committers] Re: Animation project

Stephane SOPPERA stephane.soppera at wanadoo.fr
Sat Jan 15 20:14:14 CET 2005

GSR - FR wrote:

>stephane.soppera at wanadoo.fr (2005-01-15 at 1837.25 +0000):
>>I don't see in this list anything about ipo curve interpolation.
>>A problem I have with current ipo automatic interpolation, is that it 
>>overruns limits.
>>To illustrate my points let's have a look to an IPO:
>>I you can see on this picture, the second and third point have the same 
>>value. But between these two points the interpolated value is not constant.
>>If you take the fifth point, that should be a minimum, the interpolation 
>>of the ipo after it go smaller than its value.
>They are bezier kind, IIRC, so they will do that. Have you tried
>editing the handle types? HKEY, Shift+H and VKEY.
Actually the problem is that they are treated as "usual" 2D curves, and 
are allready in  automatic mode. What I propose is a mode that don't 
exist and don't make sense for 2D/3D curves. It only make sense for 
animation curves (curves for which the x is the time and y a value of 

>>This kind of interpolation is the default one in 3DSMax. I have a script 
>>that moves IPO handles to obtain this interpolation, see the attached file.
> But
>I guess Bezier and the use of the correct handle type for each point
>would be better, things require acceleration in many cases.
What do you mean? By default blender already use bezier and default 
bezier automatic handles.
Automatic handles is what I consider as an issue for IPO curves since 
they are adapted for 2D/3D curves but not for "time" related ones.

But you (and every else one as I see) have the right to disagree with this.
I was just proposing this since I though that is was a good and 
animation-compliant automatic interpolation.

I think I'll simply keep my little script.

Stephane SOPPERA

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