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Question by robinking · Feb 16, 2011 at 04:58 PM · animationcurvekeyframe

How can I make an animation curve Keyframe "Auto" in code?

I'm creating an animation curve from scratch in code. I would like to set the keyframes to "Auto" like you can in the editor (as I wish to modify the keyframes themselves in the code)... at the moment my code is this:

var shoulderCurve : AnimationCurve;
var ks : Keyframe[];
ks = new Keyframe[2];
ks[0] = Keyframe(-1, 39);
ks[1] = Keyframe(1, -20);
shoulderCurve = new AnimationCurve(ks);

But that gives me keyframes with flat tangents. During runtime I can change the keyframes to Auto in the editor, and then I get the result I want - but I can't find any way of setting them as Auto to begin with, in code. I know I can set tangents manually, but that's not the same as having keyframes set to Auto.

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Answer by Cockus · Nov 02, 2012 at 02:17 PM

hi,

AnimationCurve.SmoothTangents(key index, 0) does the thing. So after creating the curve you can "Auto" it like this:

 for(int i=0; i<shoulderCurve.keys.length; ++i)
 {
   shoulderCurve.SmoothTangent(i, 0); //zero weight means average
 }
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avatar image ahn2150 · Dec 27, 2015 at 10:23 AM 0
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Oh~ Thank you!!!!

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Answer by sasasmylee · Oct 21, 2011 at 07:34 PM

Did you solved that?

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Answer by HashbangGames · Aug 17, 2012 at 01:57 PM

When I did:

 Keyframe[] ks;
 ks = new Keyframe[2];
 ks[0] = new Keyframe(0f, 0f);
 ks[1] = new Keyframe(1f, 10f);        
         
 AnimationCurve curve = new  AnimationCurve(ks);

this worked for me and I was able to get the curve i need and it showed up in the editor just fine when i use:

 curve = EditorGUILayout.CurveField("Seed", curve);
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