How do I Shadow of the ball (Isometric projectile)?

I took on a challenge to solve and tried a few things without success... Does anyone have a source that deals with this work?

I need that depending on the distance that a cannon shoots at a target, the bullet behaves in showing the shadow... The start and the target being point 0 without shadow, in the middle of the path the highest point...

I tried with animation and using distance but it didn't turn out as expected.

I wish this:

I don't know if using animation would be ideal... Could someone create a separate shadow using code I don't know... Can you help me?

I use a shadow sprite:

One way is to have the sprite and shadow as separate objects. Say you click somewhere you'd have the shadow move in a straight line and the sprite in a curved one. Here's one way to do it. You may be able to do it with eases instead, but I'm not super familiar with a lot of C3's easing, timeline or move to features.

mouse: on click
-- sprite: set t to 0
-- sprite: set startX to self.x
-- sprite: set startY to self.y
-- sprite: set goalX to mouse.x
-- sprite: set goalY to mouse.y

sprite: t<1
-- sprite: set t to min(1, self.t + 5*dt)
-- shadow: set x to lerp(sprite.startX, sprite.goalX, sprite.t)
-- shadow: set y to lerp(sprite.startY, sprite.goalY, sprite.t)
-- sprite: set x to lerp(sprite.startX, sprite.goalX, sprite.t)
-- sprite: set y to qarp(sprite.startY, (sprite.startY+sprite.goalY)/2-100 ,sprite.goalY, sprite.t)

Thanks, R0J0hound abusing it a bit could you give me a capx of this at events?

I use a shadow sprite:

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Very cool, is there a capx for this to help me?

Very cool, is there a capx for this to help me?

Of course:

drive.google.com/file/d/1YNVT90nWfMTNlxLdNcYsqw_7GjCOgTXV/view

dropbox.com/scl/fi/55r9o7p59sk580jmp296z/isoView_jumpWithShadow.capx