SpriteCutterAsset

A simple free 2D sprite cutter for Unity

Current Features:

• Can perform sprite splitting on any SpriteRenderer
• Actual texture modification along the cut by clearing out the pixels in each slice
• Easy-to-use prefab, just drop into the scene and will cut any SpriteRenderer (with an attached collider)
• Input Manager should be able to handle both old and new Input Systems
• Can perform splitting on multiple sprites at once
• 2 simple demo scenes to demonstrate and test the asset

Current Issues/Bugs:

While most features are implemented, there are still some persisting issues/bugs that still need to be ironed out before it is ready.

• Performing many successive sprite cutting causes the textures to not be cut/cleared in an expected manner
• Again, multiple successive cutting still has some issues with input detection and line intersecting

Limitations:

• The most obvious limitation regarding 2D sprite splitting is convex shape splitting since these shapes don't always necessarily resolve to 2 sperate slices
• This asset always generate 2 slices no matter the shape
• This asset does not check for empty textures or sprites of very small area or dimensions (May add a feature to correct this in the future)
• Does not currently work on sprites that are part of a spritesheet (may also be fixed at a later point)
• Technically not a limitation but this asset depends on Unity's PolyCollider2D for the split sprites which can easily cause performance issues if too many split sprites are present in the scene

Changelog:

v0.3

• Cut sprites should take the original's filter mode now
• Fixes to cutting when sprite is rotated and scaled
• Simple texture transparency check (requires readable texture) and parameters for CutSprite() for transparency check
• Several utility functions (might be removed at a later point)
• CC0 textures/sprites for demo scenes

v0.2.5

• Minor fix to coordinate conversion
• Added comments to SpriteCutterUtils
• Fixed positioning of generated GameObjects after splitting

v0.2

• Major revisions to the sprite cutting and texture generation
• Uses Graphics.CopyTexture() which should allow non-readable textures to still be split
• Various functions have been removed/replaced with better approach

v0.1

• Currently a WIP that still has a lot of room for improvement
• It works but sometimes does not properly detect or incorrectly cuts the sprites
• Will most likely shift the processing of textures to a native plugin (at a later point)

Credits:

• Fruits by Master484 (http://m484games.ucoz.com/)
• https://openclipart.org/