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| goog.provide('ol.geom.LinearRing');
goog.require('ol.extent');
goog.require('ol.geom.GeometryLayout');
goog.require('ol.geom.GeometryType');
goog.require('ol.geom.SimpleGeometry');
goog.require('ol.geom.flat.area');
goog.require('ol.geom.flat.closest');
goog.require('ol.geom.flat.deflate');
goog.require('ol.geom.flat.inflate');
goog.require('ol.geom.flat.simplify');
/**
* @classdesc
* Linear ring geometry. Only used as part of polygon; cannot be rendered
* on its own.
*
* @constructor
* @extends {ol.geom.SimpleGeometry}
* @param {Array.<ol.Coordinate>} coordinates Coordinates.
* @param {ol.geom.GeometryLayout=} opt_layout Layout.
* @api stable
*/
ol.geom.LinearRing = function(coordinates, opt_layout) {
goog.base(this);
/**
* @private
* @type {number}
*/
this.maxDelta_ = -1;
/**
* @private
* @type {number}
*/
this.maxDeltaRevision_ = -1;
this.setCoordinates(coordinates, opt_layout);
};
goog.inherits(ol.geom.LinearRing, ol.geom.SimpleGeometry);
/**
* Make a complete copy of the geometry.
* @return {!ol.geom.LinearRing} Clone.
* @api stable
*/
ol.geom.LinearRing.prototype.clone = function() {
var linearRing = new ol.geom.LinearRing(null);
linearRing.setFlatCoordinates(this.layout, this.flatCoordinates.slice());
return linearRing;
};
/**
* @inheritDoc
*/
ol.geom.LinearRing.prototype.closestPointXY =
function(x, y, closestPoint, minSquaredDistance) {
if (minSquaredDistance <
ol.extent.closestSquaredDistanceXY(this.getExtent(), x, y)) {
return minSquaredDistance;
}
if (this.maxDeltaRevision_ != this.getRevision()) {
this.maxDelta_ = Math.sqrt(ol.geom.flat.closest.getMaxSquaredDelta(
this.flatCoordinates, 0, this.flatCoordinates.length, this.stride, 0));
this.maxDeltaRevision_ = this.getRevision();
}
return ol.geom.flat.closest.getClosestPoint(
this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,
this.maxDelta_, true, x, y, closestPoint, minSquaredDistance);
};
/**
* Return the area of the linear ring on projected plane.
* @return {number} Area (on projected plane).
* @api stable
*/
ol.geom.LinearRing.prototype.getArea = function() {
return ol.geom.flat.area.linearRing(
this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);
};
/**
* Return the coordinates of the linear ring.
* @return {Array.<ol.Coordinate>} Coordinates.
* @api stable
*/
ol.geom.LinearRing.prototype.getCoordinates = function() {
return ol.geom.flat.inflate.coordinates(
this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);
};
/**
* @inheritDoc
*/
ol.geom.LinearRing.prototype.getSimplifiedGeometryInternal =
function(squaredTolerance) {
var simplifiedFlatCoordinates = [];
simplifiedFlatCoordinates.length = ol.geom.flat.simplify.douglasPeucker(
this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,
squaredTolerance, simplifiedFlatCoordinates, 0);
var simplifiedLinearRing = new ol.geom.LinearRing(null);
simplifiedLinearRing.setFlatCoordinates(
ol.geom.GeometryLayout.XY, simplifiedFlatCoordinates);
return simplifiedLinearRing;
};
/**
* @inheritDoc
* @api stable
*/
ol.geom.LinearRing.prototype.getType = function() {
return ol.geom.GeometryType.LINEAR_RING;
};
/**
* Set the coordinates of the linear ring.
* @param {Array.<ol.Coordinate>} coordinates Coordinates.
* @param {ol.geom.GeometryLayout=} opt_layout Layout.
* @api stable
*/
ol.geom.LinearRing.prototype.setCoordinates =
function(coordinates, opt_layout) {
if (!coordinates) {
this.setFlatCoordinates(ol.geom.GeometryLayout.XY, null);
} else {
this.setLayout(opt_layout, coordinates, 1);
Eif (!this.flatCoordinates) {
this.flatCoordinates = [];
}
this.flatCoordinates.length = ol.geom.flat.deflate.coordinates(
this.flatCoordinates, 0, coordinates, this.stride);
this.changed();
}
};
/**
* @param {ol.geom.GeometryLayout} layout Layout.
* @param {Array.<number>} flatCoordinates Flat coordinates.
*/
ol.geom.LinearRing.prototype.setFlatCoordinates =
function(layout, flatCoordinates) {
this.setFlatCoordinatesInternal(layout, flatCoordinates);
this.changed();
};
|