This is a shader that allows Sprite to do the same as Image.FillMethod.Radial360 in Unity.
https://docs.unity3d.com/ja/2018.4/ScriptReference/UI.Image.FillMethod.Radial360.html
This is a demo built with WebGL.
https://kilimanjaro-a2.github.io/FilledSpriteShader/
Save the following file as FilledSprite360.shader in your project.
Then attach any material to the sprite and change the shader to Unlit/FilledSprite360.
Material mat = mySpriteGameObject.GetComponent<SpriteRenderer>().material;
/*
By assigning a value to _FillAmount,
you can change the size of the sprite display area.
The value can be assigned a range from 0 to 1,
and the value is mapped from 0 to 360 degrees.
For example, if it is 0.75, the sprite display area will be 0 to 270 degrees.
*/
mat.SetFloat("_FillAmount", 0.75);
/*
By assigning a value to _Clockwise,
You can set whether the direction of increasing the sprite display area is clockwise.
The value can only be set to 0 or 1.
If it is 1, it will be clockwise.
*/
mat.SetFloat("_Clockwise", 0);
/*
By assigning values to _FillOriginX and _FillOriginY,
you can determine the direction from which the sprite display area starts.
Each value ranges from -1 to 1.
For example, if _FillOriginX is 1 and _FillOriginY is 0,
the direction from which the display area starts is from the center of the right edge.
*/
mat.SetFloat("_FillOriginX", 1);
mat.SetFloat("_FillOriginY", 0);Refer to Assets/Plugin/FilledSprite/Samples for detailed usage.