Sha256: 81f85741d0d177bf24bae4efcd5fef075a8a67f0b66048888d0266cdde69039a
Contents?: true
Size: 889 Bytes
Versions: 5
Compression:
Stored size: 889 Bytes
Contents
// TODO
// cross and scale return new vectors,
// whereas add and normalize operate in-place
function d3_geo_cartesian(spherical) {
var λ = spherical[0],
φ = spherical[1],
cosφ = Math.cos(φ);
return [
cosφ * Math.cos(λ),
cosφ * Math.sin(λ),
Math.sin(φ)
];
}
function d3_geo_cartesianDot(a, b) {
return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
}
function d3_geo_cartesianCross(a, b) {
return [
a[1] * b[2] - a[2] * b[1],
a[2] * b[0] - a[0] * b[2],
a[0] * b[1] - a[1] * b[0]
];
}
function d3_geo_cartesianAdd(a, b) {
a[0] += b[0];
a[1] += b[1];
a[2] += b[2];
}
function d3_geo_cartesianScale(vector, k) {
return [
vector[0] * k,
vector[1] * k,
vector[2] * k
];
}
function d3_geo_cartesianNormalize(d) {
var l = Math.sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
d[0] /= l;
d[1] /= l;
d[2] /= l;
}
Version data entries
5 entries across 5 versions & 3 rubygems