refine geosphere based on octahedron instead of icosahedron

cginternals / webgl-operate

A TypeScript based WebGL rendering framework.

https://webgl-operate.org

MIT License

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Open cgcostume opened 5 years ago

cgcostume commented 5 years ago

Creating a geosphere based on octahedron allows for more usable uv generation (e.g. for equirectangular maps). Implementation is discussed and illustrated here: https://www.binpress.com/creating-octahedron-sphere-unity/

create octahedron.ts
refine icosahedron and octahedron w.r.t. latest webgl-operate naming conventions

cgcostume commented 5 years ago

advanced (nice to have):

index-based triangle-strip implementation please: refer to Lindstrom and Valerio, Terrain Simplification Simplified: A General Framework for View-Dependent Out-of-Core Visualization https://www.computer.org/csdl/journal/tg/2002/03/v0239/13rRUxBrGgM