130 lines
3.4 KiB
JavaScript
130 lines
3.4 KiB
JavaScript
goog.provide('ol.geom.LineString');
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goog.require('ol.extent');
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goog.require('ol.geom.SimpleGeometry');
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goog.require('ol.geom.closest');
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goog.require('ol.geom.flat');
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goog.require('ol.geom.simplify');
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/**
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* @constructor
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* @extends {ol.geom.SimpleGeometry}
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* @param {ol.geom.RawLineString} coordinates Coordinates.
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* @param {ol.geom.GeometryLayout=} opt_layout Layout.
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*/
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ol.geom.LineString = function(coordinates, opt_layout) {
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goog.base(this);
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/**
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* @private
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* @type {number}
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*/
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this.maxDelta_ = -1;
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/**
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* @private
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* @type {number}
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*/
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this.maxDeltaRevision_ = -1;
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this.setCoordinates(coordinates, opt_layout);
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};
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goog.inherits(ol.geom.LineString, ol.geom.SimpleGeometry);
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/**
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* @inheritDoc
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*/
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ol.geom.LineString.prototype.closestPointXY =
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function(x, y, closestPoint, minSquaredDistance) {
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if (minSquaredDistance <
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ol.extent.closestSquaredDistanceXY(this.getExtent(), x, y)) {
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return minSquaredDistance;
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}
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if (this.maxDeltaRevision_ != this.revision) {
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this.maxDelta_ = Math.sqrt(ol.geom.closest.getMaxSquaredDelta(
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this.flatCoordinates, 0, this.flatCoordinates.length, this.stride, 0));
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this.maxDeltaRevision_ = this.revision;
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}
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return ol.geom.closest.getClosestPoint(
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this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,
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this.maxDelta_, false, x, y, closestPoint, minSquaredDistance);
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};
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/**
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* @return {ol.geom.RawLineString} Coordinates.
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*/
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ol.geom.LineString.prototype.getCoordinates = function() {
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return ol.geom.flat.inflateCoordinates(
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this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);
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};
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/**
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* @return {number} Length.
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*/
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ol.geom.LineString.prototype.getLength = function() {
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return ol.geom.flat.lineStringLength(
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this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);
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};
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/**
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* @inheritDoc
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*/
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ol.geom.LineString.prototype.getSimplifiedGeometryInternal =
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function(squaredTolerance) {
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var simplifiedFlatCoordinates = [];
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simplifiedFlatCoordinates.length = ol.geom.simplify.douglasPeucker(
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this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,
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squaredTolerance, simplifiedFlatCoordinates, 0);
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var simplifiedLineString = new ol.geom.LineString(null);
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simplifiedLineString.setFlatCoordinates(
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ol.geom.GeometryLayout.XY, simplifiedFlatCoordinates);
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return simplifiedLineString;
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};
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/**
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* @inheritDoc
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*/
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ol.geom.LineString.prototype.getType = function() {
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return ol.geom.GeometryType.LINE_STRING;
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};
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/**
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* @param {ol.geom.RawLineString} coordinates Coordinates.
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* @param {ol.geom.GeometryLayout=} opt_layout Layout.
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*/
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ol.geom.LineString.prototype.setCoordinates =
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function(coordinates, opt_layout) {
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if (goog.isNull(coordinates)) {
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this.setFlatCoordinates(ol.geom.GeometryLayout.XY, null);
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} else {
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this.setLayout(opt_layout, coordinates, 1);
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if (goog.isNull(this.flatCoordinates)) {
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this.flatCoordinates = [];
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}
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this.flatCoordinates.length = ol.geom.flat.deflateCoordinates(
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this.flatCoordinates, 0, coordinates, this.stride);
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this.dispatchChangeEvent();
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}
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};
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/**
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* @param {ol.geom.GeometryLayout} layout Layout.
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* @param {Array.<number>} flatCoordinates Flat coordinates.
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*/
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ol.geom.LineString.prototype.setFlatCoordinates =
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function(layout, flatCoordinates) {
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this.setFlatCoordinatesInternal(layout, flatCoordinates);
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this.dispatchChangeEvent();
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};
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