140 lines
4.4 KiB
JavaScript
140 lines
4.4 KiB
JavaScript
/**
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* @module ol/geom/flat/intersectsextent
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*/
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import {containsExtent, createEmpty, extendFlatCoordinates, intersects, intersectsSegment} from '../../extent.js';
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import {linearRingContainsXY, linearRingContainsExtent} from '../flat/contains.js';
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import {forEach as forEachSegment} from '../flat/segments.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 {number} end End.
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* @param {number} stride Stride.
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* @param {module:ol/extent~Extent} extent Extent.
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* @return {boolean} True if the geometry and the extent intersect.
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*/
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export function intersectsLineString(flatCoordinates, offset, end, stride, extent) {
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const coordinatesExtent = extendFlatCoordinates(
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createEmpty(), flatCoordinates, offset, end, stride);
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if (!intersects(extent, coordinatesExtent)) {
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return false;
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}
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if (containsExtent(extent, coordinatesExtent)) {
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return true;
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}
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if (coordinatesExtent[0] >= extent[0] &&
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coordinatesExtent[2] <= extent[2]) {
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return true;
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}
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if (coordinatesExtent[1] >= extent[1] &&
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coordinatesExtent[3] <= extent[3]) {
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return true;
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}
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return forEachSegment(flatCoordinates, offset, end, stride,
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/**
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* @param {module:ol/coordinate~Coordinate} point1 Start point.
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* @param {module:ol/coordinate~Coordinate} point2 End point.
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* @return {boolean} `true` if the segment and the extent intersect,
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* `false` otherwise.
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*/
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function(point1, point2) {
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return intersectsSegment(extent, point1, point2);
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});
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}
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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.<number>} ends Ends.
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* @param {number} stride Stride.
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* @param {module:ol/extent~Extent} extent Extent.
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* @return {boolean} True if the geometry and the extent intersect.
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*/
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export function intersectsLineStringArray(flatCoordinates, offset, ends, stride, extent) {
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for (let i = 0, ii = ends.length; i < ii; ++i) {
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if (intersectsLineString(
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flatCoordinates, offset, ends[i], stride, extent)) {
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return true;
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}
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offset = ends[i];
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}
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return false;
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}
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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 {number} end End.
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* @param {number} stride Stride.
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* @param {module:ol/extent~Extent} extent Extent.
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* @return {boolean} True if the geometry and the extent intersect.
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*/
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export function intersectsLinearRing(flatCoordinates, offset, end, stride, extent) {
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if (intersectsLineString(
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flatCoordinates, offset, end, stride, extent)) {
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return true;
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}
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if (linearRingContainsXY(flatCoordinates, offset, end, stride, extent[0], extent[1])) {
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return true;
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}
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if (linearRingContainsXY(flatCoordinates, offset, end, stride, extent[0], extent[3])) {
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return true;
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}
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if (linearRingContainsXY(flatCoordinates, offset, end, stride, extent[2], extent[1])) {
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return true;
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}
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if (linearRingContainsXY(flatCoordinates, offset, end, stride, extent[2], extent[3])) {
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return true;
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}
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return false;
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}
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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.<number>} ends Ends.
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* @param {number} stride Stride.
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* @param {module:ol/extent~Extent} extent Extent.
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* @return {boolean} True if the geometry and the extent intersect.
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*/
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export function intersectsLinearRingArray(flatCoordinates, offset, ends, stride, extent) {
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if (!intersectsLinearRing(
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flatCoordinates, offset, ends[0], stride, extent)) {
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return false;
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}
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if (ends.length === 1) {
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return true;
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}
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for (let i = 1, ii = ends.length; i < ii; ++i) {
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if (linearRingContainsExtent(flatCoordinates, ends[i - 1], ends[i], stride, extent)) {
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return false;
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}
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}
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return true;
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}
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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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* @param {module:ol/extent~Extent} extent Extent.
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* @return {boolean} True if the geometry and the extent intersect.
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*/
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export function intersectsLinearRingMultiArray(flatCoordinates, offset, endss, stride, extent) {
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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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if (intersectsLinearRingArray(
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flatCoordinates, offset, ends, stride, extent)) {
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return true;
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}
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offset = ends[ends.length - 1];
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}
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return false;
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}
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