Hello,
I have some sprite and I want to divide it into two parts by randomly line (or polyline) like at picture.
But without MeshFilter I have no idea how to do it.
Help me please.
Sorry for my English and Thanks!
Do you need this in edit mode or runtime?
Runtime.
Thats a little bit difficult. You can do square chunks of code at runtime fairly easily, but as for dynamic angled shapes like that, its going to take a home-rolled solution to fit your exact needs for sure. You’d need something that iterates through the whole image, checking a couple points (randomly selected? depending on “sword” slices?), doing some math to get a line between them, and to determine which pixels are on which side of said line, then copying pixels from side A and side B into their own new sprites… so yeah not gonna be easy, lol be sure to share it with us when you wrap that up 
I can imagine something like that will turn up on the asset store soon though, with the new 2D tools kinda being so popular.
I was thinking about copying pixels via GetPixel/SetPixel from Texture2D. But I think it is very difficult for productivity. Or is there a quick way to copy the pixels?
In the first step, I want to learn how to cut a straight line.
You can use Texture2D.ReadPixels and PolygonCollider2D.SetPath(if you use physics) for that.
hmm This function gets a portion the screen?
How can I ReadPixels from some Sprite?
with get pixels 32 and set pixels 32, that’s the fastest way to grab those pixels to work with. add them to a Color array, and iterate through working some magic.