| /* Copyright (c) 2006-2010 by OpenLayers Contributors (see authors.txt for | |
| * full list of contributors). Published under the Clear BSD license. | |
| * See http://svn.openlayers.org/trunk/openlayers/license.txt for the | |
| * full text of the license. */ | |
| /** | |
| * @requires OpenLayers/Geometry.js | |
| */ | |
| /** | |
| * Class: OpenLayers.Geometry.Point | |
| * Point geometry class. | |
| * | |
| * Inherits from: | |
| * - <OpenLayers.Geometry> | |
| */ | |
| OpenLayers.Geometry.Point = OpenLayers.Class(OpenLayers.Geometry, { | |
| /** | |
| * APIProperty: x | |
| * {float} | |
| */ | |
| x: null, | |
| /** | |
| * APIProperty: y | |
| * {float} | |
| */ | |
| y: null, | |
| /** | |
| * Constructor: OpenLayers.Geometry.Point | |
| * Construct a point geometry. | |
| * | |
| * Parameters: | |
| * x - {float} | |
| * y - {float} | |
| * | |
| */ | |
| initialize: function(x, y) { | |
| OpenLayers.Geometry.prototype.initialize.apply(this, arguments); | |
| this.x = parseFloat(x); | |
| this.y = parseFloat(y); | |
| }, | |
| /** | |
| * APIMethod: clone | |
| * | |
| * Returns: | |
| * {<OpenLayers.Geometry.Point>} An exact clone of this OpenLayers.Geometry.Point | |
| */ | |
| clone: function(obj) { | |
| if (obj == null) { | |
| obj = new OpenLayers.Geometry.Point(this.x, this.y); | |
| } | |
| // catch any randomly tagged-on properties | |
| OpenLayers.Util.applyDefaults(obj, this); | |
| return obj; | |
| }, | |
| /** | |
| * Method: calculateBounds | |
| * Create a new Bounds based on the lon/lat | |
| */ | |
| calculateBounds: function () { | |
| this.bounds = new OpenLayers.Bounds(this.x, this.y, | |
| this.x, this.y); | |
| }, | |
| /** | |
| * APIMethod: distanceTo | |
| * Calculate the closest distance between two geometries (on the x-y plane). | |
| * | |
| * Parameters: | |
| * geometry - {<OpenLayers.Geometry>} The target geometry. | |
| * options - {Object} Optional properties for configuring the distance | |
| * calculation. | |
| * | |
| * Valid options: | |
| * details - {Boolean} Return details from the distance calculation. | |
| * Default is false. | |
| * edge - {Boolean} Calculate the distance from this geometry to the | |
| * nearest edge of the target geometry. Default is true. If true, | |
| * calling distanceTo from a geometry that is wholly contained within | |
| * the target will result in a non-zero distance. If false, whenever | |
| * geometries intersect, calling distanceTo will return 0. If false, | |
| * details cannot be returned. | |
| * | |
| * Returns: | |
| * {Number | Object} The distance between this geometry and the target. | |
| * If details is true, the return will be an object with distance, | |
| * x0, y0, x1, and x2 properties. The x0 and y0 properties represent | |
| * the coordinates of the closest point on this geometry. The x1 and y1 | |
| * properties represent the coordinates of the closest point on the | |
| * target geometry. | |
| */ | |
| distanceTo: function(geometry, options) { | |
| var edge = !(options && options.edge === false); | |
| var details = edge && options && options.details; | |
| var distance, x0, y0, x1, y1, result; | |
| if(geometry instanceof OpenLayers.Geometry.Point) { | |
| x0 = this.x; | |
| y0 = this.y; | |
| x1 = geometry.x; | |
| y1 = geometry.y; | |
| distance = Math.sqrt(Math.pow(x0 - x1, 2) + Math.pow(y0 - y1, 2)); | |
| result = !details ? | |
| distance : {x0: x0, y0: y0, x1: x1, y1: y1, distance: distance}; | |
| } else { | |
| result = geometry.distanceTo(this, options); | |
| if(details) { | |
| // switch coord order since this geom is target | |
| result = { | |
| x0: result.x1, y0: result.y1, | |
| x1: result.x0, y1: result.y0, | |
| distance: result.distance | |
| }; | |
| } | |
| } | |
| return result; | |
| }, | |
| /** | |
| * APIMethod: equals | |
| * Determine whether another geometry is equivalent to this one. Geometries | |
| * are considered equivalent if all components have the same coordinates. | |
| * | |
| * Parameters: | |
| * geom - {<OpenLayers.Geometry.Point>} The geometry to test. | |
| * | |
| * Returns: | |
| * {Boolean} The supplied geometry is equivalent to this geometry. | |
| */ | |
| equals: function(geom) { | |
| var equals = false; | |
| if (geom != null) { | |
| equals = ((this.x == geom.x && this.y == geom.y) || | |
| (isNaN(this.x) && isNaN(this.y) && isNaN(geom.x) && isNaN(geom.y))); | |
| } | |
| return equals; | |
| }, | |
| /** | |
| * Method: toShortString | |
| * | |
| * Returns: | |
| * {String} Shortened String representation of Point object. | |
| * (ex. <i>"5, 42"</i>) | |
| */ | |
| toShortString: function() { | |
| return (this.x + ", " + this.y); | |
| }, | |
| /** | |
| * APIMethod: move | |
| * Moves a geometry by the given displacement along positive x and y axes. | |
| * This modifies the position of the geometry and clears the cached | |
| * bounds. | |
| * | |
| * Parameters: | |
| * x - {Float} Distance to move geometry in positive x direction. | |
| * y - {Float} Distance to move geometry in positive y direction. | |
| */ | |
| move: function(x, y) { | |
| this.x = this.x + x; | |
| this.y = this.y + y; | |
| this.clearBounds(); | |
| }, | |
| /** | |
| * APIMethod: rotate | |
| * Rotate a point around another. | |
| * | |
| * Parameters: | |
| * angle - {Float} Rotation angle in degrees (measured counterclockwise | |
| * from the positive x-axis) | |
| * origin - {<OpenLayers.Geometry.Point>} Center point for the rotation | |
| */ | |
| rotate: function(angle, origin) { | |
| angle *= Math.PI / 180; | |
| var radius = this.distanceTo(origin); | |
| var theta = angle + Math.atan2(this.y - origin.y, this.x - origin.x); | |
| this.x = origin.x + (radius * Math.cos(theta)); | |
| this.y = origin.y + (radius * Math.sin(theta)); | |
| this.clearBounds(); | |
| }, | |
| /** | |
| * APIMethod: getCentroid | |
| * | |
| * Returns: | |
| * {<OpenLayers.Geometry.Point>} The centroid of the collection | |
| */ | |
| getCentroid: function() { | |
| return new OpenLayers.Geometry.Point(this.x, this.y); | |
| }, | |
| /** | |
| * APIMethod: resize | |
| * Resize a point relative to some origin. For points, this has the effect | |
| * of scaling a vector (from the origin to the point). This method is | |
| * more useful on geometry collection subclasses. | |
| * | |
| * Parameters: | |
| * scale - {Float} Ratio of the new distance from the origin to the old | |
| * distance from the origin. A scale of 2 doubles the | |
| * distance between the point and origin. | |
| * origin - {<OpenLayers.Geometry.Point>} Point of origin for resizing | |
| * ratio - {Float} Optional x:y ratio for resizing. Default ratio is 1. | |
| * | |
| * Returns: | |
| * {OpenLayers.Geometry} - The current geometry. | |
| */ | |
| resize: function(scale, origin, ratio) { | |
| ratio = (ratio == undefined) ? 1 : ratio; | |
| this.x = origin.x + (scale * ratio * (this.x - origin.x)); | |
| this.y = origin.y + (scale * (this.y - origin.y)); | |
| this.clearBounds(); | |
| return this; | |
| }, | |
| /** | |
| * APIMethod: intersects | |
| * Determine if the input geometry intersects this one. | |
| * | |
| * Parameters: | |
| * geometry - {<OpenLayers.Geometry>} Any type of geometry. | |
| * | |
| * Returns: | |
| * {Boolean} The input geometry intersects this one. | |
| */ | |
| intersects: function(geometry) { | |
| var intersect = false; | |
| if(geometry.CLASS_NAME == "OpenLayers.Geometry.Point") { | |
| intersect = this.equals(geometry); | |
| } else { | |
| intersect = geometry.intersects(this); | |
| } | |
| return intersect; | |
| }, | |
| /** | |
| * APIMethod: transform | |
| * Translate the x,y properties of the point from source to dest. | |
| * | |
| * Parameters: | |
| * source - {<OpenLayers.Projection>} | |
| * dest - {<OpenLayers.Projection>} | |
| * | |
| * Returns: | |
| * {<OpenLayers.Geometry>} | |
| */ | |
| transform: function(source, dest) { | |
| if ((source && dest)) { | |
| OpenLayers.Projection.transform( | |
| this, source, dest); | |
| this.bounds = null; | |
| } | |
| return this; | |
| }, | |
| /** | |
| * APIMethod: getVertices | |
| * Return a list of all points in this geometry. | |
| * | |
| * Parameters: | |
| * nodes - {Boolean} For lines, only return vertices that are | |
| * endpoints. If false, for lines, only vertices that are not | |
| * endpoints will be returned. If not provided, all vertices will | |
| * be returned. | |
| * | |
| * Returns: | |
| * {Array} A list of all vertices in the geometry. | |
| */ | |
| getVertices: function(nodes) { | |
| return [this]; | |
| }, | |
| CLASS_NAME: "OpenLayers.Geometry.Point" | |
| }); | |