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Difference between revisions of "User:Tut Bastet"
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<googlemap height ="500" lat="0" lon="0" zoom="1" controls="medium" type="game"> | <googlemap height ="500" lat="0" lon="0" zoom="1" controls="medium" type="game"> | ||
</googlemap> | </googlemap> | ||
| + | |||
| + | // This file adds a new circle overlay to GMaps2 | ||
| + | // it is really a many-pointed polygon, but look smooth enough to be a circle. | ||
| + | var CircleOverlay = function(latLng, radius, strokeColor, strokeWidth, strokeOpacity, fillColor, fillOpacity) { | ||
| + | this.latLng = latLng; | ||
| + | this.radius = radius; | ||
| + | this.strokeColor = strokeColor; | ||
| + | this.strokeWidth = strokeWidth; | ||
| + | this.strokeOpacity = strokeOpacity; | ||
| + | this.fillColor = fillColor; | ||
| + | this.fillOpacity = fillOpacity; | ||
| + | } | ||
| + | |||
| + | // Implements GOverlay interface | ||
| + | CircleOverlay.prototype = GOverlay; | ||
| + | |||
| + | CircleOverlay.prototype.initialize = function(map) { | ||
| + | this.map = map; | ||
| + | } | ||
| + | |||
| + | CircleOverlay.prototype.clear = function() { | ||
| + | if(this.polygon != null && this.map != null) { | ||
| + | this.map.removeOverlay(this.polygon); | ||
| + | } | ||
| + | } | ||
| + | |||
| + | // Calculate all the points and draw them | ||
| + | CircleOverlay.prototype.redraw = function(force) { | ||
| + | var d2r = Math.PI / 180; | ||
| + | circleLatLngs = new Array(); | ||
| + | var circleLat = this.radius * 0.014483; // Convert statute miles into degrees latitude | ||
| + | var circleLng = circleLat / Math.cos(this.latLng.lat() * d2r); | ||
| + | var numPoints = 40; | ||
| + | |||
| + | // 2PI = 360 degrees, +1 so that the end points meet | ||
| + | for (var i = 0; i < numPoints + 1; i++) { | ||
| + | var theta = Math.PI * (i / (numPoints / 2)); | ||
| + | var vertexLat = this.latLng.lat() + (circleLat * Math.sin(theta)); | ||
| + | var vertexLng = this.latLng.lng() + (circleLng * Math.cos(theta)); | ||
| + | var vertextLatLng = new GLatLng(vertexLat, vertexLng); | ||
| + | circleLatLngs.push(vertextLatLng); | ||
| + | } | ||
| + | |||
| + | this.clear(); | ||
| + | this.polygon = new GPolygon(circleLatLngs, this.strokeColor, this.strokeWidth, this.strokeOpacity, this.fillColor, this.fillOpacity); | ||
| + | this.map.addOverlay(this.polygon); | ||
| + | } | ||
| + | |||
| + | CircleOverlay.prototype.remove = function() { | ||
| + | this.clear(); | ||
| + | } | ||
| + | |||
| + | CircleOverlay.prototype.containsLatLng = function(latLng) { | ||
| + | // Polygon Point in poly | ||
| + | if(this.polygon.containsLatLng) { | ||
| + | return this.polygon.containsLatLng(latLng); | ||
| + | } | ||
| + | } | ||
| + | |||
| + | CircleOverlay.prototype.setRadius = function(radius) { | ||
| + | this.radius = radius; | ||
| + | } | ||
| + | |||
| + | CircleOverlay.prototype.setLatLng = function(latLng) { | ||
| + | this.latLng = latLng; | ||
| + | } | ||
| + | |||
| + | circle = new CircleOverlay(map.getCenter(), circleRadius, "#336699", 1, 1, '#336699', 0.25); | ||
| + | map.addOverlay(circle); | ||
Revision as of 06:49, 30 March 2010
// This file adds a new circle overlay to GMaps2 // it is really a many-pointed polygon, but look smooth enough to be a circle. var CircleOverlay = function(latLng, radius, strokeColor, strokeWidth, strokeOpacity, fillColor, fillOpacity) { this.latLng = latLng; this.radius = radius; this.strokeColor = strokeColor; this.strokeWidth = strokeWidth; this.strokeOpacity = strokeOpacity; this.fillColor = fillColor; this.fillOpacity = fillOpacity; }
// Implements GOverlay interface CircleOverlay.prototype = GOverlay;
CircleOverlay.prototype.initialize = function(map) { this.map = map; }
CircleOverlay.prototype.clear = function() { if(this.polygon != null && this.map != null) { this.map.removeOverlay(this.polygon); } }
// Calculate all the points and draw them CircleOverlay.prototype.redraw = function(force) { var d2r = Math.PI / 180; circleLatLngs = new Array(); var circleLat = this.radius * 0.014483; // Convert statute miles into degrees latitude var circleLng = circleLat / Math.cos(this.latLng.lat() * d2r); var numPoints = 40;
// 2PI = 360 degrees, +1 so that the end points meet for (var i = 0; i < numPoints + 1; i++) { var theta = Math.PI * (i / (numPoints / 2)); var vertexLat = this.latLng.lat() + (circleLat * Math.sin(theta)); var vertexLng = this.latLng.lng() + (circleLng * Math.cos(theta)); var vertextLatLng = new GLatLng(vertexLat, vertexLng); circleLatLngs.push(vertextLatLng); }
this.clear(); this.polygon = new GPolygon(circleLatLngs, this.strokeColor, this.strokeWidth, this.strokeOpacity, this.fillColor, this.fillOpacity); this.map.addOverlay(this.polygon); }
CircleOverlay.prototype.remove = function() { this.clear(); }
CircleOverlay.prototype.containsLatLng = function(latLng) { // Polygon Point in poly if(this.polygon.containsLatLng) { return this.polygon.containsLatLng(latLng); } }
CircleOverlay.prototype.setRadius = function(radius) { this.radius = radius; }
CircleOverlay.prototype.setLatLng = function(latLng) { this.latLng = latLng; }
circle = new CircleOverlay(map.getCenter(), circleRadius, "#336699", 1, 1, '#336699', 0.25); map.addOverlay(circle);
