coordinates

问题 is there any way to get the coordinates for the labels in the radar chart? I'm trying to put images instead of text in the labels area. 回答1: You can calculate it using the scale property. Here is something that draws a blue circle at those points after the animation completes. onAnimationComplete: function () { for (var i = 0; i < this.scale.valuesCount; i++) { // get the poitn position var pointLabelPosition = this.scale.getPointPosition(i, this.scale.calculateCenterOffset(this.scale.max) +

问题 If I have two GPS locations, say 51.507222, -0.1275 and 48.856667, 2.350833, what formula could I use to calculate the distance between the two? I've heard a lot about a haversine formula, but can't find any information about it, or how to apply it to C. I've written the following code, however, it's very innacurate. Anybody know why? I can't figure it out. The problem comes from the function itself, but I don't know what it is. float calcDistance(float A, float B, float C, float D) { float

问题 I am trying to make a python script to extract the nodal coordinates from the ODB file (from abaqus). So far i have come up with the code attached below (don't mind the extra information i put behind the #, sometimes it's just so i can keep track of what i'm doing) The problem is that the coordinates i extract are those from the undeformed test subject. and i need the coordinates of the nodes from the deformed test subject. Can somebody help me with how i reach this information using python

问题 Well i am working in a location based app and i need to find driving distance between two location on earth at the server end. i am coding the web service in php. Till now i am able to calculate the aerial distance using the Haversine formula, but now i want to calculate the driving distance. There can be possible duplicates for this question, but i was not able to find any help to calculate the "Driving distance" between two "coordinates" ie latitude and longitude instead of addresses in PHP

问题 I'm implementing a custom maps (image with size map_width and map_height) on an iPhone app and i try to show the current user position on this map (current_long and current_lat) I have 2 references points with a known GPS coordinates (ref1_long, ref1_lat, ref2_long and ref2_lat) and known X, Y positions in pixels (ref1_x, ref1_y, ref2_x and ref2_y) My question is: how to calculate the current_x and current_y according to these informations ? 回答1: You need to know the projection of the map.

问题 I have a collection of 2D coordinate sets (on the scale of a 100K-500K points in each set) and I am looking for the most efficient way to measure the similarity of 1 set to the other. I know of the usuals: Cosine, Jaccard/Tanimoto, etc. However I am hoping for some suggestions on any fast/efficient ones to measure similarity, especially ones that can cluster by similarity. Edit 1: The image shows what I need to do. I need to cluster all the reds, blues and greens by their shape/orientatoin,

问题 I'm looking at the formula listed here: http://www.movable-type.co.uk/scripts/latlong.html I seem to be having trouble as the resulting coordinates are not what I would expect them to be. Given the following information: Start lat: 28.455556 Start lon: -80.527778 Bearing: 317.662819(Degrees) Distance: 130.224835(Nautical miles) def getEndpoint(lat1,lon1,bearing,d): R = 6378.1 #Radius of the Earth brng = math.radians(bearing) #convert degrees to radians d = d*1.852 #convert nautical miles to

问题 I need to build an app in which there is an image. On image there are many points where user can tap and depend upon that location of tap we need to take input. Tap locations are fixed. User can zoom image. Detect multiple taps. (Single tap, double tap, etc.) Biggest problem we are facing is there are too many points near to each other. So if we tap on one point we are getting other points clicked. Following is the image according which I need to work on. I need to detect tap on all red dots

问题 I'm working on a project which requires me to calculate the heading from a variable point A to a variable point B in 0 - 360 degrees to let the object at point A face point B. Now, I'm unsure on how to achieve this, I googled but didn't find any good solution. How would I calculate the heading from point A to point B in 2D space in any situation? 回答1: In a language such as C or C++ you might use the atan2 function, which calculates the arctangent of y/x over four quadrants, taking the signs

问题 I'm new to opengGL and excuse if the questions are too naive. I'm going through some tuturials for seeking help on learning this. I have a small program written where i'm drawing a texture on a GLSurfaceView. I want to draw a number of textures(bitmap images) in a sequential order starting from 0,0 coordinates. Also I need some gap in images on the screen. Please help. Do I need to change the positioning of vertices buffer. please suggest. Here is my renderer Code. public class GlRenderer