| import {asin, atan2, cos, sin, sqrt} from "./math.js"; |
|
|
| export function spherical(cartesian) { |
| return [atan2(cartesian[1], cartesian[0]), asin(cartesian[2])]; |
| } |
|
|
| export function cartesian(spherical) { |
| var lambda = spherical[0], phi = spherical[1], cosPhi = cos(phi); |
| return [cosPhi * cos(lambda), cosPhi * sin(lambda), sin(phi)]; |
| } |
|
|
| export function cartesianDot(a, b) { |
| return a[0] * b[0] + a[1] * b[1] + a[2] * b[2]; |
| } |
|
|
| export function 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]]; |
| } |
|
|
| |
| export function cartesianAddInPlace(a, b) { |
| a[0] += b[0], a[1] += b[1], a[2] += b[2]; |
| } |
|
|
| export function cartesianScale(vector, k) { |
| return [vector[0] * k, vector[1] * k, vector[2] * k]; |
| } |
|
|
| |
| export function cartesianNormalizeInPlace(d) { |
| var l = sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]); |
| d[0] /= l, d[1] /= l, d[2] /= l; |
| } |
|
|
