point

I am rotating points around a center point in 2D space. The points are the center point, the old mouse position, and the new mouse position. My rotation function works fine, and I can calculate the angle perfectly. But I want to calculate a negative angle if the user is moving their mouse in a direction which should be interpreted as counter-clockwise. For example, moving the mouse toward the right (positive x-axis) should rotate clockwise if you are above (less than) the y value of the center point, but it should rotate counter-clockwise if you are actually below (greater than) the y value of

How can I plot an image with partial transparent scatter points just like in this picture with gnuplot? The problem is I don't know how to set the points to be transparent. Try this: set style fill transparent solid 0.35 noborder set style circle radius 0.02 plot 'test' u 1:2 with circles lc rgb "blue", \ '' u 1:2 every 100 w circles lc rgb "red" fs solid 1.0 border lt -1 which outputs As you can see, you can specify for each data set whether to use transparency and which color to use. If your data consist of two values (x and y position of the circle) you have to specify the circle's radius

I have location from GPS (lon_base, lat_base). I have a list of locations (lon1, lat1|lon2, lat2|lon3, lat3...) This list is very long and is around the world. My questions are: 1. How do I get from that list only the lon\lat that are 1 mile from my lon_base\lat_base? 2. How do I sort them from closest to farthest? Thanks in advance! You want to define your own Comparator that, in general, looks something like this: LonLat myHouse = /* whatever */ ; Comparable comp = new Comparable () { LonLat a; int compareTo (Object b) { int aDist = calcDistance(a, myHouse) ; int bDist = calcDistance(b,

Does anyone know how I can rotate a point around another in OpenCV? I am looking for a function like this: Point2f rotatePoint(Point2f p1, Point2f center, float angle) { /* MAGIC */ } Adrian These are the steps needed to rotate a point around another point by an angle alpha: Translate the point by the negative of the pivot point Rotate the point using the standard equation for 2-d (or 3-d) rotation Translate back The standard equation for rotation is: x' = x cos(alpha) - y sin(alpha) y' = x sin(alpha) + y cos(alpha) Let's take the example of Point(15,5) around Point(2,2) by 45 degrees. Firstly

mongo 2.6 I have some amount of stored polygons. And I have a point. I what to know if this point fits any of stored polygons document example { ..., "polygons" : [ [ 17.60083012593064, 78.18557739257812 ], [ 17.16834652544664, 78.19381713867188 ], [ 17.17490690610013, 78.739013671875 ], [ 17.613919673106714, 78.73489379882812 ] ], ... } There is nearly the same question already Mongodb : Check if a point is inside a stored polygon . But it is not working for me - this query has to give at least one result(the one in example) - but it does not. db.areas.find( { polygons : { $geoIntersects : {

I working on a project at the moment, where I have a point feature -- the point feature includes a 142 points -- and multiple polygon (around 10). I want to calculate the distance between every single point and the nearest polygon feature in R. My current approach is tedious and a bit long winded. I am currently planning to calculate the distance between every single point and every single polygon. For example, I would calculate the distance between the 142 points and Polygon A, the distance between the 142 points and Polygon B, the distance between 142 points and Polygon C, etc. Here is a

I have two sets of 3D points (original and reconstructed) and correspondence information about pairs - which point from one set represents the second one. I need to find 3D translation and scaling factor which transforms reconstruct set so the sum of square distances would be least (rotation would be nice too, but points are rotated similarly, so this is not main priority and might be omitted in sake of simplicity and speed). And so my question is - is this solved and available somewhere on the Internet? Personally, I would use least square method, but I don't have much time (and although I'm

I have an array of numbers and would like to retrieve one of the values from location "index". I've looked at the Java documentation http://java.sun.com/j2se/1.5.0/docs/api/java/lang/reflect/Array.html but my code still isn't compiling. here is my method: public class ConvexPolygon implements Shape { java.awt.Point[] vertices; public ConvexPolygon(java.awt.Point[] vertices) { this.vertices = vertices; this.color = color; this.filled = filled; } java.awt.Point getVertex(int index) { Point vertex; vertex = get(Point vertices, int index); } I have numbers in an array representing Points. The

I am trying to display a certain amount of points within a specific range, that is within a circle . But when using the .getBounds() function for comparison to see whether the point is within the bound, i get some points outside it as shown in the screenshot below: Map Screenshot The code currently using to check if the point is within the circle bound is below: echo ' var mark = L.marker([' . $r->coordinates[0]->longitude . ',' . $r->coordinates[0]->latitude . ']); if(circle.getBounds().contains(mark.getLatLng())){ mark.addTo(map); mark.bindPopup("'.$info.'"); } '; I am looping into an array