Sudden jumpy frame at the end of a blend

[pyroshroom]

So I thought I had figured out how to fix the sudden jumpy frames before by disabling the animate option on the final xform, but there is a sudden jump from the transition into the next sheep when I try to render out this transition in Fractorium 1.0.0.9 even with the final xform animation disabled: http://v3d0.sheepserver.net/cgi/node.cgi?id=27455&detail=motion

I have attached the video (FractoriumOutput.webm) and the jump occurs at about 5 seconds in. The two adjacent frames are also included (160.png and 161.png) which shows the jump. My settings are in the FractoriumSettings.PNG. I know that I was rendering at a relatively low 80 frames per rot and blend frames, but the issue still shows up at 320 blend frames. Changing between the CPU and OpenCL also shows no difference.

My blend also looks nothing like the electric sheep version of the blend (00247=27455=27418=27231.avi) this time, so any advice in that area to make it look more like that version would be appreciated again.

[Matt Feemster]

I will look into your issues and get back to you in a couple of days. I'm pretty confident we can solve it, but it just takes a while. Animation is a very tricky process.

[Matt Feemster]

Just wanted to let you know I am working on this. I can narrow down WHEN the difference between Fractorium and flam3 occurs, but not WHY yet. It will be a week or so, but I'll let you know. Thanks for being patient.

[pyroshroom]

Thanks for the progress update and all your hard work into this program! And no worries, I understand how long it can take to troubleshoot these issues, especially in a project that is worked on in your spare time.

[Matt Feemster]

I am very glad you posted these bugs. I have found four major bugs which were causing this. They've been present since the program was first released in late 2013. Pretty bad on my part.

Here is a Google Drive link for a test build zipped folder I've made which should have all the fixes you want:

https://drive.google.com/open?id=1maKRqveCBy9FnOfSRBG1lpHeKdwtVOyu

Please unzip and run fractorium.exe and do your test cases. To make the same animation, do:

Stagger: 0

Rotations: 0

Frames per rot: 1 (unused, but needs to be 1)

Blend frames: 20

Rot per blend: 0 (you can try 1 or 2 here also for a more spinning effect)

Please let me know if this solves your problems.

[pyroshroom]

Thanks for getting the fixes out so quickly! The test version rendered a transition that looked identical to the electric sheep version, and fixed all the flickering/sudden jumping issues seen in this issue and in this issue: https://bitbucket.org/mfeemster/fractorium/issues/18/flickering-on-alternating-frames-in

I also tried a few other renders which had similar issues and it has been resolved on those too. (I didn't report those ones since I didn't have an official copy to compare against).

However, the issue of the rotation of the transition not being normalized when copying the xml from the .flam3 directly into Fractorium is still present. Granted, the workaround of adding an additional step of saving as a .flame file and opening that prior to rendering is pretty simple now (Especially since the final xform animation now defaults to no).

[Matt Feemster]

I've fixed it so that all angles are normalized when loading from Xml:

https://drive.google.com/open?id=1maKRqveCBy9FnOfSRBG1lpHeKdwtVOyu

Please test.

[pyroshroom]

That fixed it! Thanks :D