Questions tagged [fcurves]

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3
votes
1answer
821 views

Exporting animation F-curve points from the Graph Editor

I have an animation consisting of translation in X and Y and rotation along the Z axis. Each of these Bézier curves consist of points, such as the black points in the picture above. Each of these ...
2
votes
1answer
819 views

How to change the rotation of an already existing animation?

I need to change the rotation of an already existing animation, it currently only goes forward but I also want it to go up and down. I know I can use R to rotate ...
2
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0answers
836 views

Modifying FCurve values on armature bones via python

I have this script, which does what i need with object actions. ...
0
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0answers
35 views

Moving an object in a specific way

Is it possible to show an f-curve in an animation to show how the object moves as the frames progress? I want to show how the object moves in the animation as well as show it's position on a curve ...
2
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0answers
404 views

Finding a specific fcurve!

I am trying to develop an addon that involves placing a keyframe on a specific fcurve (like for example the X Location) and then making changes to the coordinates of the handles of that keyframe (as ...
0
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1answer
536 views

What are the formulas governing blender's exponential easing for animation fcurves?

I was trying to animate something that was scaling exponentially, so I created an fcurve with two keyframes and configured it for exponential easing. It did not behave as I expected. Consider two ...
2
votes
1answer
159 views

Why is "create snapshot (ghosts)" disabled? (baked sound F-Curves in Graph Editor)

In VSE I have inserted a sound clip and added two custom properties. This is purely so I can bake different frequencies as F-Cruves which greatly helps with aligning video with music. I want those ...
0
votes
1answer
337 views

F-curves disappeared but keyframes still work

Perhaps another basic question about a mysterious disappearance. I am using Blender to edit video, and my F-curves have vanished. The keyframes are still visible and apparently functional in the ...
1
vote
1answer
537 views

Can F-Curves be used to define interpolation between keyframes?

What I'm trying to do specifically is animate a punch. With the default Bezier curves, the interpolation between the "wind-up" and "contact" poses gets eased in AND eased out. This effectively makes ...
1
vote
1answer
643 views

Script to add and remove F-Curve Modifiers to multiple selected f-cruves

I want to apply 'Cycles' modifier to multiple selected f-curves to create a walk sequence. I want to do this with a script. How can I do this?
2
votes
1answer
1k views

Insert fcurve keyframe point whilst keeping curve shape

I have 2 keyframe points on an fcurve with free bezier handles, and using Python I want to insert a point in between these keyframes whilst keeping the custom shape of the curve with the handles. I ...
0
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0answers
795 views

Pose mirroring not mirroring y-axis position

I'm learning to animate a creature I recently created and I need your help. I know that it's possible to mirror poses by naming the bones of the armature correctly using the following naming system: ...
0
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0answers
285 views

Pose mirroring being glitchy

I'm learning to animate a creature I recently created and I need your help. I know that it's possible to mirror poses by naming the bones of the armature correctly using the following naming system: ...
1
vote
1answer
557 views

How to set the easing of keyframe with Python (fast, slow, etc.)

I need to create a keyframe for scale object "target" at time "time" with slope "fast" My code right now looks like that: ...
1
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0answers
1k views

How to make Noise modifier on f-curve loop?

I am trying to make a looping animation. I am animating the camera movement using the noise modifier of an f-curve. I would like my start keyframe and end+1 keyframe to be the same so that the ...
1
vote
2answers
3k views

edit the sound used in f curve

Hey is there a way to edit the sound that are baked to f curve. I have baked the sound av it works like I expect, but there are parts of the time line where I like the value to 0, but the sound is at ...
2
votes
0answers
161 views

Tracking one strip, to another?

I've got one of my Video strips in the Video editor fully 3D-tracked by motion tracking. I wanted to add another video strip on top of it, following the track and being stabilized in the movie. How do ...
0
votes
1answer
277 views

Blender Sine wave calculated incorrectly?

While working with Blender built in sine waves, I noticed that the sine waves do not perform a full round cycle every 90 frames. Its offset by roughly 1.5 frames every 90° (Yes I checked the ...
0
votes
1answer
93 views

The active textures don't get recognized as keyframes

I'm trying to animate a character's eyes using the F-Curve, I basically want to switch between textures in the animation. The problem is: whether I right click -> Insert Keyframe, or I use "i", or ...
11
votes
3answers
2k views

What is the mathematical basis for F-Curves?

The Blender user's manual says: Although F-curves are very similar to Bézier Curves, there are some important differences. One of these differences is the fact that an F-curve doesn't allow a ...
1
vote
1answer
207 views

How do I change the direction of an object set to "Bake Sound to F-Curves"?

I have an object set to "Bake Sound to F-Curves" and "LocRot". It's set to move along the z-axis. My problem is that it moves in an upward motion as pictured below. How do I make the object move in a ...
1
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0answers
123 views

"X Location" f-curve name and buttons disappeared [closed]

I'm working on a blender file. Some time in the last days something changed. Under the active bone's tree in the F-Curve window there are the names and some buttons associated to the f-curves of the ...
1
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0answers
67 views

How do I duplicate an action and change the F-curves?

I'm trying to write a script that duplicates an action. Ultimately I'm going to be generating an entirely new set of F-curves and key-frames but I thought simply removing all F-curves and re-entering ...
3
votes
0answers
49 views

Generate a f-curve from another one

How can I generate a f-curve from the upper and lower points of another f-curve? (check out the image as example, I want to generate the green f-curve from the red f-curve) Thank you :)
1
vote
1answer
593 views

sound_bake in command line script

I'm making an audio visualizer which I want to render from the command line. Unfortunately the bpy.ops.graph.sound_bake() function seems only to work from the GUI. ...
0
votes
1answer
720 views

How can I get the rotatation with fcurves.find()?

What I want is a way to take the rotation fcurves with the code fcurves.find(), is there any way to do it?
2
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0answers
47 views

Addon executes only after left click on window

I have written a script that interpolates the beginning and end keyframes of an animation intended to be cyclic in response to my own question here. The addon executes just fine, but only after ...
4
votes
4answers
4k views

Possible to use object speed/acceleration as driver variable?

If I have an animated moving object, is it possible to get its speed and/or acceleration vector into a driver variable? Some ideas I've thought of and haven't worked out: Obviously differentiating ...
1
vote
2answers
12k views

Graph Editor does not show any keyframes [duplicate]

I already made and rigged a character. When I make keyframes in the dopesheet to time my animation, the graph editor does not show any of my keyframes, for any of my animated parts. Even when I go to ...
2
votes
2answers
341 views

Is it possible to repeat modified Shape Key actions?

so I'm trying to sync a Taurus mesh with some music to mimic the thumping of a bass and have found this video: https://www.youtube.com/watch?v=RWebgsyuaNg (starts around 1:20) which describes using ...
3
votes
2answers
992 views

Interpolation of animation cycle extremes

I'm working on a cyclic animation. I applied the F-Curve modifier Make Cyclic for better seeing what I'm doing. In the image you can see the f-curve for an specific bone. My question is, is there a ...
2
votes
1answer
164 views

Filter fcurves using script

I have an object with more than 100 fcurves. In my addon, the user has an option to filter these fcurves, and show only those that their max value is above a certain threshold. I'm using fcurve.hide ...
3
votes
2answers
2k views

modifying fcurve modifiers in python?

I've been able to assign an fcurve modifier to to fcurves in my scripts, but I can't figure out how to modify them once created. here's what the info panel spits out when I do it manually: ...
5
votes
2answers
1k views

How do I subdivide F-Curves?

My apologies if this question doesn't make sense, I'm brand new to animation. I've been fiddling around with the F-Curves and would like to subdivide two F-Curves to have another keyframe between two ...
1
vote
0answers
313 views

Looping F-Curve Modifier?

I was wondering if there is a way to exploit the F-Curve Modifiers to create a seamless loop from a Noise modifier further up the stack. What I would imagine it would do is behave kind of like the ...
5
votes
1answer
774 views

Is there a way to make baking sound to F-curves more accurate?

At the moment I've got a script that generates a bunch of bars, and bakes a narrow range of frequencies to each bar's Z scale. It ends up being a pretty simple spectrogram that I composite onto the ...
1
vote
0answers
51 views

Tie an animated tail flap to Z position change

I have created a (frighteningly realistic) swim cycle for an object, and then added a path. The object follows the path using a constraint: as it swims along the path, the tail flaps. I then added ...
1
vote
0answers
71 views

How can I copy a specific F-Curve from active to several objects? [duplicate]

I have 100 objects and I don't want to render them until frame 30. I want to set keyframes to the restrict rendering button in the outliner but I don't want to set it for every single object by myself....
4
votes
2answers
3k views

Curve Editor — Move 2 Handles the same time

I am quite new to blender and started out to do some animation with shape keys. That is working quite fine so far and now I would like to make that whole thing a bit more vivid. Therefore I would ...
2
votes
1answer
2k views

Combine F-Curve Modifiers with baked Sound

I have a Particle System on a grid with an X Velocity of 200 and a Tangent of 60. The Tangent has a keyframe with a sound baked ...
0
votes
1answer
2k views

Where are IPO curves and deltas?

I'm following an old tutorial from January 2006 (Blender Art Magazine). It mentions IPO curves and delta channels. I'm now working in Blender 2.75a and I can't find any IPO curves except the Graph ...
4
votes
1answer
1k views

How to access driver f-curve data with python?

I have a script I am working on where I create and add a shape key to an object and add a driver to the value of the shape key. By adding the driver through python it doesn't have any keyframes like a ...
3
votes
1answer
2k views

What's the range of values on a sound-baked f-curve?

I'm doing a lot of sound baking at the moment, but it's kind of hard to work with since I don't know what kind of values to expect out of the f-curve. Common sense would say that it would range from ...
5
votes
1answer
102 views

What is the purpose of the "active" toggle on fcurve modifiers?

What is the purpose of this toggle? What can it be used for? The manual page doesn't mention anything about it as far as I can see.
2
votes
1answer
648 views

How to apply fcurve modifiers on top of each other, like object modifiers?

I have a looping animation made up of a few keyframes and a Cycles fcurve modifier. I'd like to introduce some random variations so it doesn't look like an exact loop, however the cycles modifier ...
2
votes
1answer
330 views

Is it possible to move an FCurve from one bone to another?

I have 2 bones at the exact same location and in the same armature. I also have an action and a set of FCurves which are all assigned to the same bone. Now i need to "move" the fcurves from that bone ...

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