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Hi.
I am drawing a sun-moon-earth locus. I have almost finished them all. At last step, the moon trace doesn't show up when animation on.
But if I pull the variable alpha myself, the trace is shown. So I am confused now, what problem do I meet?? 😭
Thanks
Files:
sunmoonearth2.ggb
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set the animation to run in the lower left corner of the graphic
right click on alpha, set animation to false
In the Algebra window right click on A, set animation to false
In the Algebra window right click on F, set animation to false
.
Then the trace works when alpha is animated.
(but I do not know why, note: I am 99% sure that the app does not contain any scripts).
File is uploaded.
Thanks in advance.
set the animation to run in the lower left corner of the graphic
right click on alpha, set animation to false
In the Algebra window right click on A, set animation to false
In the Algebra window right click on F, set animation to false
.
Then the trace works when alpha is animated.
(but I do not know why, note: I am 99% sure that the app does not contain any scripts).
Now I understand why:
Instead of the method in my last post.: Set Background Image of pic1 to OFF and set the layer of moon to 1.
(I think Background Image = ON produce a (small) GGB-Bug: clear the traces if background image is move)
But: When background image is OFF and the layer of moon is 1 the rotated sun (pic1, Layer=0) covert the trace. (for me) this is another, more bad ggb-Bug. But if the simulation were more realistic (the moon does not move through the sun), then the bug would not be disturbing. (Alternative(?): use a sun picture with transparent background)
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