Function tesselateSphere

docs/app/js/sanddance-app.js:78978–79054

(props)

    return SphereGeometry1;
}((0, _geometryDefault.default));
function tesselateSphere(props) {
    var _props$nlat = props.nlat, nlat = _props$nlat === void 0 ? 10 : _props$nlat, _props$nlong = props.nlong, nlong = _props$nlong === void 0 ? 10 : _props$nlong;
    var _props$radius = props.radius, radius = _props$radius === void 0 ? 1 : _props$radius;
    var startLat = 0;
    var endLat = Math.PI;
    var latRange = endLat - startLat;
    var startLong = 0;
    var endLong = 2 * Math.PI;
    var longRange = endLong - startLong;
    var numVertices = (nlat + 1) * (nlong + 1);
    if (typeof radius === "number") {
        var value = radius;
        radius = function radius(n1, n2, n3, u, v) {
            return value;
        };
    }
    var positions = new Float32Array(numVertices * 3);
    var normals = new Float32Array(numVertices * 3);
    var texCoords = new Float32Array(numVertices * 2);
    var IndexType = numVertices > 0xffff ? Uint32Array : Uint16Array;
    var indices = new IndexType(nlat * nlong * 6);
    for(var y = 0; y <= nlat; y++)for(var x = 0; x <= nlong; x++){
        var u = x / nlong;
        var v = y / nlat;
        var index = x + y * (nlong + 1);
        var i2 = index * 2;
        var i3 = index * 3;
        var theta = longRange * u;
        var phi = latRange * v;
        var sinTheta = Math.sin(theta);
        var cosTheta = Math.cos(theta);
        var sinPhi = Math.sin(phi);
        var cosPhi = Math.cos(phi);
        var ux = cosTheta * sinPhi;
        var uy = cosPhi;
        var uz = sinTheta * sinPhi;
        var r = radius(ux, uy, uz, u, v);
        positions[i3 + 0] = r * ux;
        positions[i3 + 1] = r * uy;
        positions[i3 + 2] = r * uz;
        normals[i3 + 0] = ux;
        normals[i3 + 1] = uy;
        normals[i3 + 2] = uz;
        texCoords[i2 + 0] = u;
        texCoords[i2 + 1] = 1 - v;
    }
    var numVertsAround = nlong + 1;
    for(var _x = 0; _x < nlong; _x++)for(var _y = 0; _y < nlat; _y++){
        var _index = (_x * nlat + _y) * 6;
        indices[_index + 0] = _y * numVertsAround + _x;
        indices[_index + 1] = _y * numVertsAround + _x + 1;
        indices[_index + 2] = (_y + 1) * numVertsAround + _x;
        indices[_index + 3] = (_y + 1) * numVertsAround + _x;
        indices[_index + 4] = _y * numVertsAround + _x + 1;
        indices[_index + 5] = (_y + 1) * numVertsAround + _x + 1;
    }
    return {
        indices: {