BoxClip - Impossible space in Unity
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BoxClip is a set of Unity editor scripts and shader includes to allow for the creation of complex non-euclidean rasterized geometry. This was used to create the "impossible space" Selphina booth in the Vket4 Mirabilis Flor world. No stencils are used! This technique has minimal overdraw. ** MIT License - see LICENSE.txt ** Tried it? Having trouble? Please say hello to Lyuma#0781 or xnlyuma@gmail.com - I love to see any questions or feedback you may have! Fork it here: https://github.com/lyuma/BoxClip
Features
- Clipping is done both in Geometry and Fragment stages for high efficiency even in large scenes. - All content can be drawn in one pass, and no render queue manipulation is needed. - Support showing and hiding rects. - Support "ZCompress" - allows geometry to be compressed onto a plane. (Note: ZCompress does not handle borders well. Please leave extra room.) - Real-time editing using MaterialPropertyBlock (Udon support is planned) - Baking an efficient shader for upload. - Supports "ShowVolume" and "HideVolume" to reveal things within a volume rather than "through a window" - Supports "ShowCameraWithin" and "HideCameraWithin" to reveal the whole object when your camera is inside this volume.
How to use
- Import an object. - Create a new empty game object. Add a BoxClipOrigin component. Make another empty object, set this as the Origin. - Create a new folder and set the folder as the Generated asset dir. - Insert all objects to the "List of Renderers" - Click Preview. - Find the Show and Hide child objects, and create a new empty game object inside. These boxes will allow your object to be seen, or to be obscured. - Move, rotate and scale empty game objects within Show and Hide to control clipping regions. - You must click Bake To Shader when done editing, in order to upload to VRChat.
Update notes
v0.3.3: - Fix locale issue with commas (countries such as Germany) v0.3.1 & v0.3.2: - Performance fixes related to geometry culling. v0.3: - Added ShowVolume and HideVolume to reveal and hide what is contained in a 3d Volume. - Added ShowCameraWithin and HideCameraWithin to reveal the object. v0.2: - Fix Bake To Shader getting mixed up on upload when multiple BoxClipOrigin scripts are present. - Add checkbox "Scale Clip Planes". Use this with a "Scale" setting of 1000, and with mesh transform scale set to 0.001. This will make large models invisible when avatar shaders are blocked.