The Persistence of Vision Raytracer (POV-Ray).

This is the legacy Bug Tracking System for the POV-Ray project. Bugs listed here are being migrated to our github issue tracker. Please refer to that for new reports or updates to existing ones on this system.

Attached to Project: POV-Ray
Opened by Roland Mösl - 2011-12-27
Last edited by William F Pokorny - 2017-01-23

FS#230 - Improved handling of animations

October to middle November, I prodduced a 5 minutes video mainly py POVRAY.

Here a part of the video.ini file


# szenes based on games.pov

#Initial_Frame=450 - time scale 1000 - 30 seconds

#game-lost - time scale 1000 - 22 seconds

#game-lost - time scale 3000 - 12 seconds - fast through the night


#game-sunrise - time scale 1000 - 35 seconds

Now imagine all the problems:

One computer crashes often because of thermal problems.
Last picture rendere 487.

Now calculate the setings, that this computer continues the task at 487

Or 2 computers should render a scene.

Sounds very easy. Something like computer 1 makes 0..499 computer 2 makes 500..999.

But the computers are different in speed and the pictures are
very different in computation time.

So it would be best

computer 1: 0 to 999
computer 2: 999 to 0

They would meet in the middle, where ever this middle is.

So it would be much easier with

#game-sunrise - time scale 1000 - 35 seconds

So I have not to calculate the exact clock seting,
when a computer sould continue a task after crashing at picture 487

#game-sunrise - time scale 1000 - 35 seconds

This would be the reverse calcualtion order.
Starting with picture 1049 and going down 1048..1047

Grimbert Jérôme commented on Tuesday, 03 January 2012, 21:25 GMT

Summary of request: allow frameStep to be negative.

This impact animationprocessing.cpp, and is not as obvious as it might sound, due to assertion with +KC (cyclic animation) and computation of next frame.
(the stop criteria must be updated for both direction too).

Additional investigation: effect on clock delta of an initial frame == final frame ?

William F Pokorny commented on Monday, 23 January 2017, 11:24 GMT

Now tracked on github as issue #213.


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