Strange bug with shape keys in BGE #39401

New Issue

Richard R · 2014-03-25T01:22:16+01:00

Richard R commented

2014-03-25 01:22:16 +01:00

System Information
WIndows 7, 2.4ghz celeron cpu, 2gb ram, Geforce8400GS

Blender Version
2.7

Short description of error
Loading a scene, which adds a new scene with a background scene, causes the shape key animation (from the background scene) to freeze at a specific point; even though there is no call for the animation to play.

Exact steps for others to reproduce the error
Everything was working fine until I removed a Message actuator from a object that has animated shape keys and 2 other actuators. The bug doesn't show up unless the current scene replaces itself with a scene, that then loads a background scene with the object with the shape keys.

I conducted a test where I put back the Message actuator I took out. Unfortunately, it did not fix the problem. I am thinking that taking out the Message actuator the first time was just a coincidence. I conducted another test with a new blend file, and set up a similar situation across 3 scenes. I could not reproduce the bug. Either this bug is completely random or am I missing something? See strange_shapekeys.jpg. There is no code or logic bricks telling it to do that.

\This doesn't happen if the Scene.HUD or the Scene.L1 is loaded first. The problem is carried over to Scene.L2 and Scene.L3 if the ball isn't lost. If the ball is lost, it plays the animation normally. The problem is both in the view port and standalone.

I conducted another test by removing the action actuator from the "Ready? Begin!" object. The bug still shows up, so the problem isn't from the action actuator. The problem went away after I removed the animation keyframes from the shape key value properties. Now there is no animation to play; but, it proves the problem is in or connected to the animation data.

I deleted all the shape keys and animation, and tried to reproduce the original animation (ended up doing something different), and I still end up with the same bug (see strange_shapekeys2.jpg).

After a thorough investigation, I found the problem. The issue is the starting animation frame between scenes. Scene.Intro had a starting frame of 0, Scene.HUD had a starting frame of 1, and Scene.L1 had a starting frame of 0. For some reason, changing scenes in the bge that have a different start frame causes this abnormality to happen. The issue is solved; however, the bug remains.

I tried to included my project "blockbreaker" with the blend and animation files; however, there was a upload error because of a size limit. If you still need a blend file, I will try to get one uploaded when I have the oportunity.

**System Information** WIndows 7, 2.4ghz celeron cpu, 2gb ram, Geforce8400GS **Blender Version** 2.7 **Short description of error** Loading a scene, which adds a new scene with a background scene, causes the shape key animation (from the background scene) to freeze at a specific point; even though there is no call for the animation to play. **Exact steps for others to reproduce the error** Everything was working fine until I removed a Message actuator from a object that has animated shape keys and 2 other actuators. The bug doesn't show up unless the current scene replaces itself with a scene, that then loads a background scene with the object with the shape keys. I conducted a test where I put back the Message actuator I took out. Unfortunately, it did not fix the problem. I am thinking that taking out the Message actuator the first time was just a coincidence. I conducted another test with a new blend file, and set up a similar situation across 3 scenes. I could not reproduce the bug. Either this bug is completely random or am I missing something? See strange_shapekeys.jpg. There is no code or logic bricks telling it to do that. ![strange_shapekeys.jpg](https://archive.blender.org/developer/F82442/strange_shapekeys.jpg) \This doesn't happen if the Scene.HUD or the Scene.L1 is loaded first. The problem is carried over to Scene.L2 and Scene.L3 if the ball isn't lost. If the ball is lost, it plays the animation normally. The problem is both in the view port and standalone. I conducted another test by removing the action actuator from the "Ready? Begin!" object. The bug still shows up, so the problem isn't from the action actuator. The problem went away after I removed the animation keyframes from the shape key value properties. Now there is no animation to play; but, it proves the problem is in or connected to the animation data. I deleted all the shape keys and animation, and tried to reproduce the original animation (ended up doing something different), and I still end up with the same bug (see strange_shapekeys2.jpg). ![strange_shapekeys2.jpg](https://archive.blender.org/developer/F82444/strange_shapekeys2.jpg) After a thorough investigation, I found the problem. The issue is the starting animation frame between scenes. Scene.Intro had a starting frame of 0, Scene.HUD had a starting frame of 1, and Scene.L1 had a starting frame of 0. For some reason, changing scenes in the bge that have a different start frame causes this abnormality to happen. The issue is solved; however, the bug remains. I tried to included my project "blockbreaker" with the blend and animation files; however, there was a upload error because of a size limit. If you still need a blend file, I will try to get one uploaded when I have the oportunity.

Richard R commented

2014-03-25 01:22:16 +01:00

Changed status to: 'Open'

Richard R commented

2014-03-25 01:22:16 +01:00

Added subscriber: @remnar

Inês Almeida commented

2014-04-27 12:11:44 +02:00

Added subscriber: @brita

Inês Almeida commented

2014-04-27 12:11:44 +02:00

You have made several tests to pin down the origin of the bug, can you upload a minimal file? Take out everything that is not related.. textures.. etc. Or make a new file with that start frames inconsistency that you found to see if the error is reproducible.

Inês Almeida commented

2014-06-19 20:35:09 +02:00

@renmar I really need a minimal file, or I will waste too much time with this

Inês Almeida commented

2014-06-26 21:34:12 +02:00

Changed status from 'Open' to: 'Archived'

Inês Almeida closed this issue

2014-06-26 21:34:12 +02:00

Inês Almeida self-assigned this 2014-06-26 21:34:12 +02:00

Inês Almeida commented

2014-06-26 21:34:12 +02:00

No response, closing.

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Strange bug with shape keys in BGE #39401