'how to make a conical box shadow flutter

I have a circular Container that I can move around and I want it to leave a trail in the shape of a declining cone like this: coneToBe
And in the future I also want to make this cone become bigger and smaller depending on how fast the circle moves: enter image description here enter image description here

This is what I have done:
myShadow
How do I make a conical trail like the one in red?



Solution 1:[1]

How do I make Trails in Flutter, like in Unity or other game engines?

trail renderer: https://docs.unity3d.com/Manual/class-TrailRenderer.html

trails module particles https://docs.unity3d.com/Manual/PartSysTrailsModule.html

Defold trails https://forum.defold.com/t/hyper-trails-customizable-trail-effect/48986

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1