[Physics] Mesh Fracture

[jukrb0x]

we want an object can be broken into different parts

• NvBlast: https://github.com/NVIDIAGameWorks/Blast
  • implementation: https://github.com/ElasticSea/unity-fracture
• [zh-cn] Intro to Game Destruction: https://zhuanlan.zhihu.com/p/346846195
• my experimental project: https://github.com/jukrb0x/unity-fracture-code-review

[jukrb0x]

offline: the mesh is broken already before playing, it's fake fracturing. the discretization process happens before instead in game.
real-time: the mesh is broken in the runtime of the game

Offline (Pre-built destructed mesh)

• Rayfire plugin. https://www.youtube.com/watch?v=Hd7yBrm2vnc
• ProBuilder plugin. https://www.youtube.com/watch?v=InpKZloVk0w
• unity destruction. https://github.com/williambl/unity-destruction

Real-time (Computing mesh in runtime)

• [CSE 5912] Geometry Destruction. http://web.cse.ohio-state.edu/~boggus.2/5912/sp16/Geometry%20Destruction.pdf
• Powered by NvBlast. Demo: https://github.com/ElasticSea/unity-fracture
  • this seems not portable for the editor, requiring nvidia dlls. https://github.com/NVIDIAGameWorks/Blast
• OpenFracture. https://github.com/dgreenheck/OpenFracture
  • Fast Industrial-Strength Triangulation
    of Polygons, Martin Held. http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.49.3013&rep=rep1&type=pdf
  • A FAST ALGORITHM FOR GENERATING CONSTRAINED
    DELAUNAY TRIANGULATIONS. https://www.newcastle.edu.au/__data/assets/pdf_file/0019/22519/23_A-fast-algortithm-for-generating-constrained-Delaunay-triangulations.pdf
  • Triangulation and Convex Hull. https://www.uio.no/studier/emner/matnat/ifi/INF4130/h18/slides/forelesning-11---triangulering-og-convex-hull.pdf
• Good one - simple fracture algorithm. https://gist.github.com/ditzel/73f4d1c9028cc3477bb921974f84ed56

[jukrb0x]

Fracture Process

Runtime Fracture Component

Discretization

• Slicing
• Delauney triangulation algorithm

Cracking

• Force applied
• Force direction
• Hit point