init

build/js/ox.geo.js

@@ -0,0 +1,110 @@
+/*
+################################################################################
+ox.geo.js
+
+requires
+    jquery.js
+    ox.js
+################################################################################
+*/
+
+(function() {
+
+    var earthRadius = 6378137,
+        earthCircumference = 2 * Math.PI * earthRadius
+        latMax = Ox.deg(Math.atan(Ox.sinh(Math.PI))),
+        latMin = -latMax;
+        /*
+        map = {
+            width: window.innerWidth,
+            height: window.innerHeight,
+            margin: 16
+        };
+        */
+
+    Ox.getLatLng = (function() {
+        /*
+            returns {lat, lng} for a given (x, y)
+        */
+        function getLatLng(xy) {
+            return (xy - 0.5) * 2 * Math.PI;
+        }
+        return function(x, y) {
+            return {
+                lat: -Ox.deg(Math.atan(Ox.sinh(getLatLng(y)))),
+                lng: Ox.deg(getLatLng(x))
+            };
+        };
+    })();
+
+    Ox.getPlacemarks = (function() {
+        /*
+        Ox.getPlacemarks(name, callback)
+        Ox.getPlacemarks(lat, lng, callback)
+        */
+        var cache = {};
+        return function() {
+
+            // $.getScript("http://maps.google.com/maps/api/js?sensor=false", function() {
+                // getPlacemarks(args);
+            // });
+
+
+            // var args = arguments;
+            var reverse = typeof arguments[0] == "number",
+                query = $.extend({
+                    language: "en"
+                }, !reverse ? {
+                    address: arguments[0]
+                } : {
+                    latLng: new google.maps.LatLng(arguments[0], arguments[1])
+                }),
+                id = JSON.stringify(query),
+                callback = arguments[arguments.length - 1],
+                geocoder = new google.maps.Geocoder();
+            if (cache[id]) {
+                callback(cache[id]);
+            } else {
+                geocoder.geocode(query, function(results, status) {
+                    var data = {
+                        results: results,
+                        status: status
+                    };
+                    cache[id] = data;
+                    callback(data);
+                });
+            }
+            
+        };
+    })();
+
+    Ox.getXY = (function() {
+        /*
+            returns {x, y} for a given (lat, lng), between 0 and 1
+        */
+        function getXY(xy) {
+            return (xy / (2 * Math.PI) + 0.5);
+        }
+        return function(lat, lng) {
+            return {
+                x: getXY(Ox.rad(lng)),
+                y: getXY(Ox.asinh(Math.tan(Ox.rad(-lat))))
+            };
+        };
+    })();
+
+    /*
+    Ox.getZ = function(placemark, map) {
+        // returns zoom level at which placemark is fully included
+        map.width -= 2 * map.margin;
+        map.height -= 2 * map.margin;
+        var northEast = getXY(placemark.northEast),
+            southWest = getXY(placemark.southWest),
+            width = (northEast.x - southWest.x),
+            height = (northEast.y - southWest.y),
+        return parseInt(Ox.log(width / height > map.width / map.height ?
+                map.width / width : map.height / height, 2));
+    };
+    */
+
+})();