I have a plot like this: http://i.imgur.com/i9xp5.png I need the data coordinates of points in order to plot wind barbs. Now, if I wanted a wind barb to be drawn at x=100, y=20, is there a way I can obtain the data coordinates of that ( or other ) points of my plot? ...
I have created this simple expand button user control with WPF: I designed the thing with Width and Height both set to 100 so that I could see what I'm actually doing. The stripped-down XAML of this user control is: <UserControl x:Class="Foobar.ExpandButton" ... Width="100" Height="100"> ... ...
Can GPS on a phone, such as iPhone or Android determine your Z coordinates ? I know it certainly has to be able to determine X and Y, well longitude, latitude that is, but what about the Z coordinates ? Can it determine your height, and can I obtain height relative to ground ? ...
I made a program similar to the second PyODE tutorial but using VPython instead of pygame and I removed the coord function for changing coordinates. It works but the locating of the spheres and joints isn't correct. I am guessing that it is because I am using the PyODE world coordinates within VPython. Would this in the circumstance I de...
What would be the best way to use negative coordinates in pygame? At the moment I have a surface that is 1.5 times the original surface then everything that needs to be drawn is shifted up by a certain amount (to ensure the negative coordinates become positive) and drawn. Is there an easier/alternate way of doing this? ...
I have a CFrameWnd with a dialog bar, and I'd like to determine the paintable area (excluding the space used by the dialog bar) so I can draw in it without being overlapped by the dialog bar. How can I do this? GetClientRect() seems to cover the client rect area as well, and I don't see any other obvious candiates in the doucumentation. ...
Hi, I'm trying to make an interactive GUI but I need to move a certain object whenever that rectangle is clicked + dragged. Basically I wanna know whether a rectangle, that has been affine transformed, contains a specific point (x, y). Is there a way to do this? I have tried using contains() method but it doesn't work for a rectangle th...
Hi, I have in my database car incidents for example. These incidents have a latitude and longitude. On a mobile using the GPS, I get the user's location with his coordinates. The user can select a radius that he wants to know if there are incidents around him. So let's say he want to know incidents 2 miles around him. So I send from th...
Hi, I have two Lines: L1 and L2. I want to calculate the angle between the two lines. L1 has points: {(x1, y1), (x2, y2)} and L2 has points: {(x3, y3), (x4, y4)}. How can I calculate the angle formed between these two lines, without having to calculate the slopes? The problem I am currently having is that sometimes I have horizontal lin...
What are the coordinates used in UIViews and their corresponding superviews? I have this code which i would like to detect a 'corridor' where the user can touch... similar to this image: This is the code i have: CGPoint touch = [recognizer locationInView:[shuttle superview]]; CGPoint centre = shuttle.center; int outerRadiu...
Does anyone know where I could find a library of code for converting Lat/Lon position to Military Grid Reference System (MGRS)? I'm looking for a C# implementation if possible. ...
I'm using google maps in my application, and I have a webserver with a databse filled with lat/lon values. I want to mark them on the map, but I also want to cluster them together if they are within a certain pixel-distance of eachother. I figure if I retrieve all my points from the database, I should be able to do something like this (...
In flex, I am using VBox & HBox to stack components. When I try to get x,y coordinate of a component, I always get 0. If I specify cooridnate like mx:VBox x="120", then I get the value. How can I get the coordinate without explicitly stating it. ...
I am capturing some points on an X, Y plane to represent some values. I ask the user to select a few points and I want the system to then generate a curve following the trend that the user creates. How do I calculate this? So say it is this: Y = dollar amount X = unit count user input: (2500, 200), (4500, 500), (9500, 1000) Is there a...
I need to create the following WPF application: A main window with a square grid in it. The grid should have a large amount of cells in it (for example: [1000x1000]), each cell being painted black or white. A "Robot" object should be able to walk on the grid from cell to cell. I thought of using a Uniformgrid object, but I suspect th...
Imagine a surface which has got 2 points which are moving over the surface (resulting into various lines and curves) while adhering to the following conditions. These two points are always and always at a constant C distance from each other. Each point has it's own velocity and direction vector. Of course both these parameters will be...
Hi, I would like use a panel whose children have coordinates specified as percentage of total panel's width/height. Moreover, I should be able to animate the coordinate property, for example to make a button move from 10% to 50% panel's width. I've made 2 attempts: Use a Grid and specify size as stars - this was not enough, because A...
My client has saved a public Google Map with several points of interest marked on it. I need to somehow lift those co-ordinates and put them in an iPhone Google Map. How would I get the longitude & latitude of each of these points? ...
How can I get the cross street names of one particular street? Lets say I am on a street name B and I want to get two street either side of street B. I also have co-ordinates for the street B. I think this can be achieved using calculation over co-ordinates. How? If B street has Lon: 40.4325342 and Lat: -72.5346344, can I get the near...
In flex, I am getting the y-coordinate in the following way: nextHBox = HBox(ingBox.getChildByName("ing" + nextId)); nextYAxis = ingBox.localToGlobal(new Point(nextHBox.x,nextHBox.y)).y; newCanvas.x = nextYAxis; nextYAxis gives me the y-axis and I use it to position new component. It works absolutely fine. But, when there is vertical...