coordinates

问题 I'm trying to figure out how best to do this, I have a map with one Polygon drawn on it. Since it doesn't seem as though the Google Maps API V2 has a touch detection on a Polygon. I was wonder if it is possible to detect whether the touch point is inside the Polygon? If so then how, my main goal is to outline a state on a map and when the user taps that state it will show more details inside a custom view. As of now I am able to capture the MapOnClick of the map but when the user taps inside

问题 I'm trying to figure out how best to do this, I have a map with one Polygon drawn on it. Since it doesn't seem as though the Google Maps API V2 has a touch detection on a Polygon. I was wonder if it is possible to detect whether the touch point is inside the Polygon? If so then how, my main goal is to outline a state on a map and when the user taps that state it will show more details inside a custom view. As of now I am able to capture the MapOnClick of the map but when the user taps inside

问题 I'm currently using the function below and it doesn't work properly. According to Google Maps, the distance between these coordinates (from 59.3293371,13.4877472 to 59.3225525,13.4619422 ) are 2.2 kilometres while the function returns 1.6 kilometres. How can I make this function return the correct distance? function getDistanceFromLatLonInKm(lat1, lon1, lat2, lon2) { var R = 6371; // Radius of the earth in km var dLat = deg2rad(lat2-lat1); // deg2rad below var dLon = deg2rad(lon2-lon1); var a

问题 I am trying to get location of user as longitude and latitude from GPS/network which ever is available and i want to get it fast , or else previous location coordinates will return if cannot get new one right now. Here is my attempt: public class GPSTracker extends Service{ // The minimum distance to change Updates in meters private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters // The minimum time between updates in milliseconds private static final long MIN_TIME_BW

问题 Normally, polar coordinates go from 0 to π to 2 π (just before 2 π really, as it equals 0 again). However, when using the JavaScript atan2() function, I'm getting a different, weird range: Cartesian X | Cartesian Y | Theta (θ) =========================================================== 1 | 0 | 0 (0 × π ) 1 | 1 | 0.7853981633974483 (0.25 × π ) 0 | 1 | 1.5707963267948966 (0.5 × π ) -1 | 1 | 2.356194490192345 (0.75 × π ) -1 | 0 | 3.141592653589793 (1 × π ) -1 | -1 | -2.356194490192345 (-0.75 × π

问题 This question already has answers here : Closed 8 years ago . Possible Duplicate: Triggering a JavaScript click() event at specific coordinates Translated question: I'm looking for a method to programmatically click on a specific (x,y) coordinate on a web page. Original question: hi i have reviewed many codes in the internet about how to let the pointer mouse move and click but i didnot find what i need example: there is a hyper link on (X=358,Y=13) of the page and it is get different every

问题 I have a class tetronimo (a tetris block) that has four QRect types (named first , second , third , fourth respectively). I draw each tetronimo using a build_tetronimo_L type functions. These build the tetronimo in a certain direction, but as in tetris you're supposed to be able to rotate the tetronimo's, I'm trying to rotate a tetronimo by rotating each individual square of the tetronimo. I have found the following formula to apply to each (x, y) coordinate of a particular square. newx = cos

问题 I'm currently working on my own basic drawing app. So far, my app is working well but I noticed that my motion event doesn't seem to get all the X and Y axis points that are touched. When I move my finger across the screen, there is noticeable spaces between the circles. Only when I move my finger slowly does it capture all the points. Is there a way I can grab all the points or is there a way i can optimize it to be able to handle all the points? Here's how I'm doing it: setOnTouchListener

问题 I have a quadratic curve in canvas (defined by start, end and control point). What I need is to get more of the curve's coordinates (eg. the middle, quarters etc.). With that, I'd be able (after a few iterations of finding coordinates) to animate an object based on this curve (I know it can be done easily with SVG, but that's not an option). image taken from http://www.html5canvastutorials.com/tutorials/html5-canvas-quadratic-curves/ Is there an easy way to do this? When I checked for

问题 I'm building somewhat of a different website, below is my HTML markup and my question. Please don't be put off by this wall of text, I'm sure it's really not a difficult problem for someone who know's their stuff but it takes some explaining. <div id="0" class="cell" style="top: 0px; left: 0px;"> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tbody> <tr id="0"> <td id="0"> </td> <td id="1"> </td> <td id="2"> </td> <td id="3"> </td> <td id="4"> </td> <td id="5"> </td> <td id=