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29 lines
813 B
29 lines
813 B
/**
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* @module ol/geom/flat/center
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*/
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import {createEmpty, createOrUpdateFromFlatCoordinates} from '../../extent.js';
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/**
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* @param {Array<number>} flatCoordinates Flat coordinates.
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* @param {number} offset Offset.
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* @param {Array<Array<number>>} endss Endss.
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* @param {number} stride Stride.
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* @return {Array<number>} Flat centers.
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*/
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export function linearRingss(flatCoordinates, offset, endss, stride) {
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const flatCenters = [];
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let extent = createEmpty();
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for (let i = 0, ii = endss.length; i < ii; ++i) {
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const ends = endss[i];
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extent = createOrUpdateFromFlatCoordinates(
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flatCoordinates,
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offset,
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ends[0],
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stride
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);
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flatCenters.push((extent[0] + extent[2]) / 2, (extent[1] + extent[3]) / 2);
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offset = ends[ends.length - 1];
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}
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return flatCenters;
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}
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