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UMG Widget curve editor doesn't show float curves

I'm trying to create an animation for a UMG Widget it the designer. Adding keyframes works for both float and vector properties when using the simple timeline, but when using the curve editor, only vector properties are visible, so I can't change tangents of float curve animations.

This behavior appears to be present in both 4.8.3 and 4.9

Product Version: UE 4.9
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asked Sep 18 '15 at 06:39 PM in Bug Reports

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avatar image Rudy Q ♦♦ STAFF Sep 21 '15 at 01:50 PM

Hello veggiesaurus,

I have a few questions for you that will help narrow down what issue it is that you are experiencing.

Quick questions:

  1. Can you reproduce this issue in a clean project?

  2. If so, could you provide a detailed list of steps to reproduce this issue on our end?

  3. Could you provide screen shots of any blueprints that may be involved with this issue?

avatar image essbuh Sep 23 '15 at 12:58 AM

Hi Rudy,

We're also seeing the same issue in 4.9.1; in our case it is a custom float property. I can set keys on the regular track but when I switch to the curve editor nothing appears. It can be reproduced in a clean project.

Steps I used to reproduce in a clean project:

  • Create a new UMG widget, "AnimatedFloatText"

  • Add a variable called "FloatValue"

  • Add a function called "SetFloatValue" that passes an input float to FloatValue's setter

  • Add a child Text widget

  • Bind the Text property to a new function that returns FloatValue as text

  • Create another UMG widget, "MainWidget"

  • Add a child AnimatedFloatText widget

  • Add a new animation

  • Inside the animation, add the AnimatedFloatText and then the FloatValue track

  • In the key editor, add keys at 0 and 1 seconds

  • Switch to Curve Editor, notice that no curves or keys appear and the different zoom to fit buttons do nothing

Screenshots of key / curve editors: key editor curve editor

I've attached a sample project that illustrates this.

umgfloatcurve.zip (367.5 kB)
umg_anim_keys.png (26.8 kB)
umg_anim_curve.png (37.8 kB)
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Hello essbuh,

I was able to reproduce this issue on our end. I have written up a report (UE-21391) and I have submitted it to the devleopers for further consideration. I will provide updates with any pertinent information as it becomes available. Thank you for your time and information.

Make it a great day

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answered Sep 23 '15 at 02:54 PM

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Rudy Q ♦♦ STAFF
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avatar image veggiesaurus Sep 26 '15 at 04:23 PM

Thanks! Looking forward to this being fixed.

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