@babylonjs/core/Meshes/Builders/geodesicBuilder.js

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import { CreatePolyhedron } from "./polyhedronBuilder.js";
import { Logger } from "../../Misc/logger.js";
import { _PrimaryIsoTriangle, GeodesicData } from "../geodesicMesh.js";
/**
 * Creates the Mesh for a Geodesic Polyhedron
 * @see https://en.wikipedia.org/wiki/Geodesic_polyhedron
 * @see https://doc.babylonjs.com/features/featuresDeepDive/mesh/creation/polyhedra/geodesic_poly
 * @param name defines the name of the mesh
 * @param options an object used to set the following optional parameters for the polyhedron, required but can be empty
 * * m number of horizontal steps along an isogrid
 * * n number of angled steps along an isogrid
 * * size the size of the Geodesic, optional default 1
 * * sizeX allows stretching in the x direction, optional, default size
 * * sizeY allows stretching in the y direction, optional, default size
 * * sizeZ allows stretching in the z direction, optional, default size
 * * faceUV an array of Vector4 elements used to set different images to the top, rings and bottom respectively
 * * faceColors an array of Color3 elements used to set different colors to the top, rings and bottom respectively
 * * flat when true creates a flat shaded mesh, optional, default true
 * * subdivisions increasing the subdivisions increases the number of faces, optional, default 4
 * * sideOrientation optional and takes the values : Mesh.FRONTSIDE (default), Mesh.BACKSIDE or Mesh.DOUBLESIDE
 * * frontUvs only usable when you create a double-sided mesh, used to choose what parts of the texture image to crop and apply on the front side, optional, default vector4 (0, 0, 1, 1)
 * * backUVs only usable when you create a double-sided mesh, used to choose what parts of the texture image to crop and apply on the back side, optional, default vector4 (0, 0, 1, 1)
 * @param scene defines the hosting scene
 * @returns Geodesic mesh
 */
export function CreateGeodesic(name, options, scene = null) {
    let m = options.m || 1;
    if (m !== Math.floor(m)) {
        m = Math.floor(m);
        Logger.Warn("m not an integer only floor(m) used");
    }
    let n = options.n || 0;
    if (n !== Math.floor(n)) {
        n = Math.floor(n);
        Logger.Warn("n not an integer only floor(n) used");
    }
    if (n > m) {
        const temp = n;
        n = m;
        m = temp;
        Logger.Warn("n > m therefore m and n swapped");
    }
    const primTri = new _PrimaryIsoTriangle();
    primTri.build(m, n);
    const geodesicData = GeodesicData.BuildGeodesicData(primTri);
    const geoOptions = {
        custom: geodesicData,
        size: options.size,
        sizeX: options.sizeX,
        sizeY: options.sizeY,
        sizeZ: options.sizeZ,
        faceUV: options.faceUV,
        faceColors: options.faceColors,
        flat: options.flat,
        updatable: options.updatable,
        sideOrientation: options.sideOrientation,
        frontUVs: options.frontUVs,
        backUVs: options.backUVs,
    };
    const geodesic = CreatePolyhedron(name, geoOptions, scene);
    return geodesic;
}
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