Scene Transition may be asymmetrical
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Working on Animator about interpolating Scene cameras as in Sketchup scene animation, I discover that in some cases the scene transition are not symmetrical.
In the attached model, by TDahl, transition:
- between Scene1 and Scene2 is symmetrical
- between Scene2 and Scene3 is symmetrical
- BUT between Scene3 and Scene4 is NOT SYMMETRICAL
Animator - Asymetrical Scene transitions.mov
I have tried to reconstruct a similar camera transition algorithm in Animator. The one I have, not yet released, is usually identical to Sketchup scene animation, except in some of these cases where the camera makes about a half turn. At least mine is symmetrical.
Has anyone encountered this weird problem?
I attach the model (SU2017), so that you can judge.
TDahl - Animator Camera Test.skpFredo
EDIT: even more weird. The transition path from Scene 3 to 4 is not even always the same !!!
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I recall an inconsistency based on the cameras relationship to the axis...
not sure if this is the same as it was many years ago...
my 'memory' tells me I avoided this by moving geometry and camera so you never crossed the axis...
it seemed that if any camera position included a negative, SU makes a decision whether to move clock or anti clockwise...
and it's not always the same decision...
does that make any sense?
john
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