polyline

问题 I am trying to draw a polyline on a canvas which will have rectangle on each point. The Polyline is bound to a collection of points from the ViewModel. When I try to set DataTemplate for each point (like below) it shows no rectangle on polyline points. Is there some way to display rectangle on polyline points? Later I want to adjust the polyline by dragging these points. <Polyline Points="{Binding EdgePoints, Converter={StaticResource pointCollectionConverter}}" StrokeThickness="2"> <Polyline

问题 I am using Google Maps within my Flutter project. I am trying to parse two JSON files in my assets so that I can use their latitudes and longitudes in a Polyline and markers. The markers work fine but now I am adding another future to my Future builder for the polylines and I receive the following error: The argument type LatLng can't be assigned to the parameter type List<LatLng> . Future _future; Future _futuree; Future<String> loadString() async => await rootBundle.loadString('assets

问题 I wrote a few years ago some code that highlighted a path on a Google Map with a user typed in width. The user determines how wide the highlighted path is in meters that way they can see the ground they have covered (ex lawn fertilizing etc). I calculated the distance from a point and used the Google Maps computeOffset to determine the corners of the polygon. Next I used the bearing information from the path to plot the next polygon. LatLng corner1 = SphericalUtil.computeOffset(point2,

问题 I am able to render the below points using the VBO and shaders in OpenGL 4.x. typedef struct Point { double x,y,z,w; }Point; std::vector<Point>vPoints; glBufferData(GL_ARRAY_BUFFER, vPoints.size()* sizeof(Point), &vPoints[0], GL_STATIC_DRAW); glVertexAttribPointer(0, 4, GL_DOUBLE, GL_FALSE, vPoints.size()*sizeof(GLdouble), (GLvoid*)0) How do we specify VBO to draw a line string using below variables typedef struct LineString { vector<Point> vPointList; }LineString; vector<LineString> vLines;

问题 I'm making the GMSPolyline in the GoogleMap. When I want to remove the GMSPolyline by coding polyline.map = nil , but it can not working for me. I'm copy some coding in the below. (added the marker before, I need remove the polyline only) Thank you for your help!!! my coding: func mapView(_ mapView: GMSMapView, didTap marker: GMSMarker) -> Bool { //MARK: create the GMSPolyline let polyline = GMSPolyline() //MARK: remove the old polyline from the GoogleMap polyline.map = nil let origin = "\

问题 So I have an application that draws a polyline on the map depending on the speed of the user, but I have some issues with it. Firstly, sometimes a large amount of the line is one colour even though given speed variations it should be changing. Secondly, if the user moves the map around or zooms, then the whole line goes red. And finally, I get this weird dot that looks like it is something to do with rendering? http://imgur.com/a/o5AKf Pretty new to programming so it might be really obvious!

问题 anyone can have code to encode the polyline(array of ) latitude and longitude value to the ascii string in java for e.g. my array was in java latlng{ {22296401,70797251}, {22296401,70797451}, {22296401,70797851} } this above value store into the List object as GeoPoint type like List<GeoPoint> polyline and want to convert into ascii string like this a~l~Fjk~uOwHJy@P I need method which accept array of latlng value and return the ascii string any help will be appreciate thanks in advance 回答1:

问题 Hi all I need to display Polyline in MKapview . I have done that but I need to show Polyline based on route. I'm getting like below image if am using location did update then it comes good i am try to store latitude and longitude then next time i have to displayed previous Polyline in that time i am not getting, please help me 回答1: - (void)drowRoautLines_FromLocation:(CLLocationCoordinate2D)FromLocation ToLocation:(CLLocationCoordinate2D)ToLocation { MKPlacemark *source = [[MKPlacemark alloc

问题 I have a Triangle as a polyline and I want to draw an Altitude. I give the command "line" or "_line" the right points but AutoCAD draws the line from the vertex to the adjacent vertex. It's not just in AutoLISP, AutoCAD won't let me draw a line from a vertex to the middle of an edge in a polyline. How can I do that? I thought of adding a vertex in the polyline, but this didn't help that much. I tried to add connector: a circle or another object close enough to the line and connect the

问题 I know that if I rotate an object, which extends javafx.scene.shape.Shape , I can transform it into 3D space, even though it was primarily designed to be in 2D (at least as far as I know). Let's say I have a 3D scene (perspective camera and depth buffer are used), where various MeshView s occur. Some are used for areas, others for lines. In both cases those shapes must be triangulated in order to draw them with a TriangleMesh , which is often nontrivial. Now when I change the drawing of these