b52d283641
The ol.geom.SharedVertices structure represents a flattened array of vertex coordinates. This is intended to support optimal WebGL rendering.
80 lines
1.6 KiB
JavaScript
80 lines
1.6 KiB
JavaScript
goog.provide('ol.geom.AbstractCollection');
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goog.require('ol.Extent');
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goog.require('ol.geom.Geometry');
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/**
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* A collection of geometries. This constructor is not to be used directly.
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*
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* @constructor
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* @extends {ol.geom.Geometry}
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*/
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ol.geom.AbstractCollection = function() {
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goog.base(this);
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/**
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* @type {number}
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*/
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this.dimension;
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/**
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* @type {Array.<ol.geom.Geometry>}
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*/
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this.components = null;
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/**
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* @type {ol.Extent}
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* @protected
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*/
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this.bounds = null;
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};
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goog.inherits(ol.geom.AbstractCollection, ol.geom.Geometry);
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/**
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* @inheritDoc
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*/
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ol.geom.AbstractCollection.prototype.getBounds = function() {
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if (goog.isNull(this.bounds)) {
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var minX,
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minY = minX = Number.POSITIVE_INFINITY,
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maxX,
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maxY = maxX = Number.NEGATIVE_INFINITY,
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components = this.components,
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len = components.length,
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bounds, i;
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for (i = 0; i < len; ++i) {
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bounds = components[i].getBounds();
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minX = Math.min(bounds.minX, minX);
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minY = Math.min(bounds.minY, minY);
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maxX = Math.max(bounds.maxX, maxX);
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maxY = Math.max(bounds.maxY, maxY);
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}
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this.bounds = new ol.Extent(minX, minY, maxX, maxY);
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}
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return this.bounds;
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};
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/**
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* @inheritDoc
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*/
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ol.geom.AbstractCollection.prototype.getCoordinates = function() {
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var count = this.components.length;
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var coordinates = new Array(count);
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for (var i = 0; i < count; ++i) {
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coordinates[i] = this.components[i].getCoordinates();
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}
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return coordinates;
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};
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/**
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* @inheritDoc
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*/
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ol.geom.AbstractCollection.prototype.getType = goog.abstractMethod;
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