18 lines
1002 B
Markdown
18 lines
1002 B
Markdown
Generates the shapes and then serializes them to a JSON file with a list of
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vertices (`positions`) and a list of triangle faces (`cells`) that index into
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the list of vertices. Suitable for input into [Three.js's
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BufferGeometry](https://threejs.org/docs/#api/en/core/BufferGeometry) or
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[regl](https://github.com/regl-project/regl/blob/gh-pages/example/camera.js).
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Icosahedrons can be generated significantly faster than Three.js's version in
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JavaScript (which I pretty much copied into Rust).
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Trunacated icosahedrons (I call them hexspheres) are a bit slower to generate
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since they are made by generating a icosahedron and then subdividing it into
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hexagon and pentagon faces.
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When rendering hexspheres of detail level 5 and higher and icosahedrons of
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detail level of 7 and higher in WebGL, make sure to enable the
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[`OES_element_index_uint`](https://developer.mozilla.org/en-US/docs/Web/API/OES_element_index_uint)
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extension since the number of vertices might overflow the normal int index.
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