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chat icon New option for IPO curves

saeZ

Posted: Sat Jul 10, 2004 10:53 am
Joined: 26 Mar 2003
Posts: 4
Hello everyone!

When animating anything in Blender, you'll eventually stumble across this very common problem also found in other 3D packages.

Example:

Place LocRot key on frame 1 and the same key on frame 10. Then adjust LocRot and place a new key on frame 20. The curves between frames 1-10 should be flat but aren't:



I'm thinking of an option that would automatically flatten the curves between two IDENTICAL keys:



It would save lots of time when animating. This should work with all animatable parameters whether you're animating a pulsating light or making lip sync on a character.

What do you think?

Thank you for your time!

saeZ / spooktus.[/b]
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saeZ

Posted: Sat Jul 10, 2004 11:46 am
Joined: 26 Mar 2003
Posts: 4
The way to take the idea even further, would be to implement a new (optional) interpolation method which would treat the curves in a more user-friendly manner.

Current system:




New system (something like this):




I'm not sure what this is called, but I believe they call it Plateau slope orientation in XSI.

saeZ / spooktus.
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theeth

Posted: Sat Jul 10, 2004 1:49 pm
Joined: 16 Oct 2002
Posts: 1177
That can be called Overshooting awareness and was presented in a siggraph papers on boids (behavioral animation). I'll see if I can find a link, I just have a printed version.

Martin
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levon

Posted: Sun Jul 11, 2004 1:32 pm
Joined: 31 Jul 2003
Posts: 413
for the first one, trying to get a stright line, in edit mode of the ipo select the handles and press V
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zygom

Posted: Mon Jul 12, 2004 11:05 am
Joined: 22 Apr 2004
Posts: 57
It would be very good if it is possible to select interpolation mode (constant,linear and bezier) for EACH keyframe
like afterfx
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z3r0_d

Posted: Mon Jul 12, 2004 2:05 pm
Joined: 16 Oct 2002
Posts: 1520
zygom wrote:
It would be very good if it is possible to select interpolation mode (constant,linear and bezier) for EACH keyframe
like afterfx

you select them, and press the corresponding key type shortcut

some are:
v
h
shift+h
...

I'd search in the docs for more info, but I need to eat brekfeast soon to leave on time.

personally, I would prefer that I could set all new ipo keys to be created as vector [straight line] keys
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theeth

Posted: Mon Jul 12, 2004 2:35 pm
Joined: 16 Oct 2002
Posts: 1177
z3r0_d wrote:
personally, I would prefer that I could set all new ipo keys to be created as vector [straight line] keys

Just change the interpolation type to Linear (Tkey).

That's actually what zygom is asking for. Interpolation types between keys, not globally for the curve. While you can always do linear with bezier interpolation, you can't do constant.

Martin
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- John Lennon
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