You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
29 lines
813 B
29 lines
813 B
3 years ago
|
/**
|
||
|
|
* @module ol/geom/flat/center
|
||
|
|
*/
|
||
|
|
import {createEmpty, createOrUpdateFromFlatCoordinates} from '../../extent.js';
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @param {Array<number>} flatCoordinates Flat coordinates.
|
||
|
|
* @param {number} offset Offset.
|
||
|
|
* @param {Array<Array<number>>} endss Endss.
|
||
|
|
* @param {number} stride Stride.
|
||
|
|
* @return {Array<number>} Flat centers.
|
||
|
|
*/
|
||
|
|
export function linearRingss(flatCoordinates, offset, endss, stride) {
|
||
|
|
const flatCenters = [];
|
||
|
|
let extent = createEmpty();
|
||
|
|
for (let i = 0, ii = endss.length; i < ii; ++i) {
|
||
|
|
const ends = endss[i];
|
||
|
|
extent = createOrUpdateFromFlatCoordinates(
|
||
|
|
flatCoordinates,
|
||
|
|
offset,
|
||
|
|
ends[0],
|
||
|
|
stride
|
||
|
|
);
|
||
|
|
flatCenters.push((extent[0] + extent[2]) / 2, (extent[1] + extent[3]) / 2);
|
||
|
|
offset = ends[ends.length - 1];
|
||
|
|
}
|
||
|
|
return flatCenters;
|
||
|
|
}
|