[BUG] morphing and actions don't sync up well?

[Sov-trotter]

For the code below :

using Javis

function ground(args...)
    background("black")
    sethue("white")
end

astar(args...; do_action=:stroke) = star(O, 50, 5, 0.5, 0, do_action)
acirc(args...; color = "red", do_action=:stroke) = circle(Point(0, 0), 50, do_action)

video = Video(500, 500)
back = Background(1:50, ground)
star_obj = Object(1:50, astar)
act!(star_obj, Action(10:25, morph_to(acirc)))
act!(star_obj, Action(26:35, anim_translate(Point(100, -100))))
act!(star_obj, Action(36:45, morph_to(astar)))


render(video, pathname = "testmorph.gif")

Expected Behaviour:
So what we want is the star to morph into a circle, then that circle should translate to (100, -100)(the Javis CRS)
and the morph back to a star positioned at O(0, 0).

Current Behaviour:
So translate() shifts the origin to 100, -100 and is never shifted back to 0,0. So the circle to star morphing takes place at 100, -100.

Is this related to #367

[Wikunia]

Thanks for opening the issue. I feel like this might be more a problem of morphing as no new object is created during the morph I feel like all actions after morphing might potentially be broken 😞

[Sov-trotter]

I now realize this is not realted to morphing. But anim_translate might be broken.

star_obj = Object(1:60, astar)
act!(star_obj, Action(30:40, anim_translate(Point(100, -100))))
act!(star_obj, Action(45:55, anim_translate(Point(100, -100))))

So by law it should translate to 100, -100 in frames 30:40 and then stay at that position for frames 45::55.
But instead, this happens

How ever if I do something like

star_obj = Object(1:60, astar)
act!(star_obj, Action(30:40, anim_translate(Point(100, -100))))
act!(star_obj, Action(45:55, anim_translate(O))) # translate it to origin this time

It stays put for frames 45:55 while this time we can expect it to go back to origin.

[Wikunia]

The docstring is simply wrong and fixed in: #370

[Sov-trotter]

So this is expected behaviour?

[Wikunia]

Yes it will move by a vector instead of to a point. The other one is currently not really possible as one does not know where the point is at the beginning and it would have some unsolvable problems when one applies two of those actions at the same time. See also #367

[Sov-trotter]

AH got it thanks!