openlayers
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Build tools and sources for developing OpenLayers based mapping applications
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JavaScript
goog.provide('ol.geom.MultiPoint');
goog.require('ol');
goog.require('ol.array');
goog.require('ol.extent');
goog.require('ol.geom.GeometryLayout');
goog.require('ol.geom.GeometryType');
goog.require('ol.geom.Point');
goog.require('ol.geom.SimpleGeometry');
goog.require('ol.geom.flat.deflate');
goog.require('ol.geom.flat.inflate');
goog.require('ol.math');
/**
* @classdesc
* Multi-point geometry.
*
* @constructor
* @extends {ol.geom.SimpleGeometry}
* @param {Array.<ol.Coordinate>} coordinates Coordinates.
* @param {ol.geom.GeometryLayout=} opt_layout Layout.
* @api stable
*/
ol.geom.MultiPoint = function(coordinates, opt_layout) {
ol.geom.SimpleGeometry.call(this);
this.setCoordinates(coordinates, opt_layout);
};
ol.inherits(ol.geom.MultiPoint, ol.geom.SimpleGeometry);
/**
* Append the passed point to this multipoint.
* @param {ol.geom.Point} point Point.
* @api stable
*/
ol.geom.MultiPoint.prototype.appendPoint = function(point) {
ol.DEBUG && console.assert(point.getLayout() == this.layout,
'the layout of point should match layout');
if (!this.flatCoordinates) {
this.flatCoordinates = point.getFlatCoordinates().slice();
} else {
ol.array.extend(this.flatCoordinates, point.getFlatCoordinates());
}
this.changed();
};
/**
* Make a complete copy of the geometry.
* @return {!ol.geom.MultiPoint} Clone.
* @api stable
*/
ol.geom.MultiPoint.prototype.clone = function() {
var multiPoint = new ol.geom.MultiPoint(null);
multiPoint.setFlatCoordinates(this.layout, this.flatCoordinates.slice());
return multiPoint;
};
/**
* @inheritDoc
*/
ol.geom.MultiPoint.prototype.closestPointXY = function(x, y, closestPoint, minSquaredDistance) {
if (minSquaredDistance <
ol.extent.closestSquaredDistanceXY(this.getExtent(), x, y)) {
return minSquaredDistance;
}
var flatCoordinates = this.flatCoordinates;
var stride = this.stride;
var i, ii, j;
for (i = 0, ii = flatCoordinates.length; i < ii; i += stride) {
var squaredDistance = ol.math.squaredDistance(
x, y, flatCoordinates[i], flatCoordinates[i + 1]);
if (squaredDistance < minSquaredDistance) {
minSquaredDistance = squaredDistance;
for (j = 0; j < stride; ++j) {
closestPoint[j] = flatCoordinates[i + j];
}
closestPoint.length = stride;
}
}
return minSquaredDistance;
};
/**
* Return the coordinates of the multipoint.
* @return {Array.<ol.Coordinate>} Coordinates.
* @api stable
*/
ol.geom.MultiPoint.prototype.getCoordinates = function() {
return ol.geom.flat.inflate.coordinates(
this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);
};
/**
* Return the point at the specified index.
* @param {number} index Index.
* @return {ol.geom.Point} Point.
* @api stable
*/
ol.geom.MultiPoint.prototype.getPoint = function(index) {
var n = !this.flatCoordinates ?
0 : this.flatCoordinates.length / this.stride;
ol.DEBUG && console.assert(0 <= index && index < n,
'index should be in between 0 and n');
if (index < 0 || n <= index) {
return null;
}
var point = new ol.geom.Point(null);
point.setFlatCoordinates(this.layout, this.flatCoordinates.slice(
index * this.stride, (index + 1) * this.stride));
return point;
};
/**
* Return the points of this multipoint.
* @return {Array.<ol.geom.Point>} Points.
* @api stable
*/
ol.geom.MultiPoint.prototype.getPoints = function() {
var flatCoordinates = this.flatCoordinates;
var layout = this.layout;
var stride = this.stride;
/** @type {Array.<ol.geom.Point>} */
var points = [];
var i, ii;
for (i = 0, ii = flatCoordinates.length; i < ii; i += stride) {
var point = new ol.geom.Point(null);
point.setFlatCoordinates(layout, flatCoordinates.slice(i, i + stride));
points.push(point);
}
return points;
};
/**
* @inheritDoc
* @api stable
*/
ol.geom.MultiPoint.prototype.getType = function() {
return ol.geom.GeometryType.MULTI_POINT;
};
/**
* @inheritDoc
* @api stable
*/
ol.geom.MultiPoint.prototype.intersectsExtent = function(extent) {
var flatCoordinates = this.flatCoordinates;
var stride = this.stride;
var i, ii, x, y;
for (i = 0, ii = flatCoordinates.length; i < ii; i += stride) {
x = flatCoordinates[i];
y = flatCoordinates[i + 1];
if (ol.extent.containsXY(extent, x, y)) {
return true;
}
}
return false;
};
/**
* Set the coordinates of the multipoint.
* @param {Array.<ol.Coordinate>} coordinates Coordinates.
* @param {ol.geom.GeometryLayout=} opt_layout Layout.
* @api stable
*/
ol.geom.MultiPoint.prototype.setCoordinates = function(coordinates, opt_layout) {
if (!coordinates) {
this.setFlatCoordinates(ol.geom.GeometryLayout.XY, null);
} else {
this.setLayout(opt_layout, coordinates, 1);
if (!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.MultiPoint.prototype.setFlatCoordinates = function(layout, flatCoordinates) {
this.setFlatCoordinatesInternal(layout, flatCoordinates);
this.changed();
};