You're rotating around 0/0, not around its center. Try moving the polygon before rotating, such that its center is 0/0. Then rotate it, and finally move it back. For instance, if you only need movement of vertices/polygons for this particular case, you could probably simply adjust rotate to be: def...

Yes, there's a much better approach. For this and many other topological operations, the rgeos package has you well covered. Here, you're wanting rgeos::gWithin(): ## Required packages library(rgdal) library(raster) ## For example polygon & functions used to make example points library(rgeos) ## Reproducible example poly <- readOGR(system.file("external", package="raster"), "lux")[1,] points...

The map variable is undefined in the showInfoCounty routine. Make it global (it is currently local to the initialize function, or at least the version of it you initialize is, there is a global one, but it isn't initialized). Minimal, Complete, Tested and Readable example showing issue: fiddle Change: var...

javascript,opengl-es,webgl,polygons,index-buffer

The only way you will be able to draw multiple polylines in a single draw call is to use GL_LINES. When OpenGL goes to render a buffer using GL_LINES or GL_LINESTRIP it will need 2 vertices from your vertex buffer, and use these 2 point to draw a line. The...

javascript,google-maps,google-maps-api-3,polygons

You have multiple functions with the same name (addNewPoly). The particular browser will choose one. Also #GG5555 is not a valid color. One possible solution, create one function, pass the desired colors in as additional arguments. function addNewPoly(coorArray, strokeColor, fillColor) { var triangleCoords = new Array(); var element1; var element2;...

Put that inside Button.Content: <Button ...> <Viewbox ...> </Viewbox> </Button> Don't forget to remove ViewBox.Margin (make Button big enough) or make it negative. ...

javascript,google-maps-api-3,polygons

So what you're needing to do is to create a complex polygon. A "simple" polygon is basically your normal multi-sided closed shape. A "complex" polygon is interpreted by Google Maps as a 'single' shape, denoted as an array of simple polygons. I am working on something similar where I allow...

Ok, here is a rather simple recipe of how to arrive at the answer: Start with the set of intersection points ordered by traveling the contour clockwise: ABCDEFGH Sort them according to distance from the start of line: HCFEDGBA We also need to remember for each point if it is...

ios,objective-c,uibezierpath,polygons

The operation you are describing is a union. Generally, computing the union of a set of polygons is somewhat complicated. Doing so efficiently and accurately is more complicated. iOS doesn't provide a public API for this operation. I suggest you look into using an existing C or C++ library to...

You are close, just need a few more lines after finding the contours: polys = [] for cont in contours1: approx_curve = cv2.approxPolyDP(cont, 3, False) polys.append(approx_curve) cv2.drawContours(img, polys, -1, (0, 255, 0), thickness=1, lineType=8) cv2.imshow("medicine polygons", img) cv2.waitKey() The doc on approxPolyDP....

The only way I could figure out how to do this, was to create a table of unioned geometries in a CTE, use ST_Dump to produce individual polygons (ie, 1-2 and 3-4-5-6 in your question) and then select the max and min values of the data attributes from the original...

Area area = new Area(poly1); area.intersect(new Area(poly2)); return area.isEmpty(); ...

ios,polygon,cllocation,polygons

you can use this to determine the center of a non self intersecting polygon: #include <iostream> struct Point2D { double x; double y; }; Point2D compute2DPolygonCentroid(const Point2D* vertices, int vertexCount) { Point2D centroid = {0, 0}; double signedArea = 0.0; double x0 = 0.0; // Current vertex X double y0...

javascript,arrays,google-maps,google-maps-api-3,polygons

Create a function to return the click listener function. Pass the index and the polygon into that function so you get function closure on them to keep them associated: function attachInfoWindow(newPoly, i) { return function (event) { var eventNo = newPoly.get("eventNum"); var outTime = newPoly.get("offTime"); var resTime = objArray[i].restoreTime; var...

javascript,google-maps,polygons

The winding direction of a "hole" needs to be opposite the winding direction of the outer boundary. Reverse the order of the coordinates in the inner boundary: var paths_innerBW = []; paths_innerBW =[paths[0],[]]; for (var i=0;i<paths[1].length; i++) { paths_innerBW[1][i] = paths[1][paths[1].length-i-1]; } updated fiddle code snippet: var paths = [...