/** * @module ol/rotationconstraint */ import {toRadians} from './math.js'; /** * @typedef {function((number|undefined), boolean=): (number|undefined)} Type */ /** * @param {number|undefined} rotation Rotation. * @return {number|undefined} Rotation. */ export function disable(rotation) { if (rotation !== undefined) { return 0; } return undefined; } /** * @param {number|undefined} rotation Rotation. * @return {number|undefined} Rotation. */ export function none(rotation) { if (rotation !== undefined) { return rotation; } return undefined; } /** * @param {number} n N. * @return {Type} Rotation constraint. */ export function createSnapToN(n) { const theta = (2 * Math.PI) / n; return ( /** * @param {number|undefined} rotation Rotation. * @param {boolean} [isMoving] True if an interaction or animation is in progress. * @return {number|undefined} Rotation. */ function (rotation, isMoving) { if (isMoving) { return rotation; } if (rotation !== undefined) { rotation = Math.floor(rotation / theta + 0.5) * theta; return rotation; } return undefined; } ); } /** * @param {number} [tolerance] Tolerance. * @return {Type} Rotation constraint. */ export function createSnapToZero(tolerance) { tolerance = tolerance || toRadians(5); return ( /** * @param {number|undefined} rotation Rotation. * @param {boolean} [isMoving] True if an interaction or animation is in progress. * @return {number|undefined} Rotation. */ function (rotation, isMoving) { if (isMoving) { return rotation; } if (rotation !== undefined) { if (Math.abs(rotation) <= tolerance) { return 0; } return rotation; } return undefined; } ); }