point

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed last year . I saw on StackOverflow a "point in polygon" raytracing algorithm that I implemented in my PHP Code. Most of the time, it works well, but in some complicated cases, with complex polygons and vicious points, it fails and it says that point in not in polygon when it is. For example: You will find here my Polygon and

问题 I have the created the table below CREATE TABLE geom (g GEOMETRY); and have inserted many rows, example below: INSERT INTO geom (g) VALUES(PolygonFromText('POLYGON(( 9.190586853 45.464518970, 9.190602686 45.463993916, 9.191572471 45.464001929, 9.191613325 45.463884676, 9.192136130 45.463880767, 9.192111509 45.464095594, 9.192427961 45.464117804, 9.192417811 45.464112862, 9.192509035 45.464225851, 9.192493139 45.464371079, 9.192448471 45.464439002, 9.192387444 45.464477861, 9.192051402 45

问题 I am trying to develop a very basic game and it involves mouse. So what i am trying to do is getting coordinates of mouse to write a integer. I searched internet and find this. mouse_x=MouseInfo.getPointerInfo().getLocation().getX(); mouse_y=MouseInfo.getPointerInfo().getLocation().getY(); It partially worked and gave me coordinates of mouse on desktop. But what i need is coordinates of mouse on frame. So if only i knew the coordinates of frame's starting (0,0) point (not the window's. the

问题 I'm coding in Microsoft Visual Studio 2010 Express for Windows Phone. I need to add a point onto a Canvas , but I can't... for (float x = x1; x < x2; x += dx) { Point poin = new Point(); poin.X = x; poin.Y = Math.Sin(x); canvas1.Children.Add(poin); } Studio says: Error 2 Argument 1: cannot convert from 'System.Windows.Point' to 'System.Windows.UIElement' My question is: how do I add a point onto a Canvas ? 回答1: From your code snippet I assume you're trying to draw a curve. To do this, you can

问题 I need help with one tricky thing that I've tried to solve for a couple of days now. It feels like it should be relatively easy and that I am simply missing something somewhere. I have an array defining each wall point (black dots) and I want to create a new inside point (green dots) for each wall point. The distance between each wall point and inside point should be 600. I made a picture to show what I mean: I'm writing this in javascript with aid of WebGL (ThreeJS). 回答1: I'm going to

问题 I want to add 26 points into chart and label them from a to z. How do I move the label to a nearby position from its original position and how to use an arrow or other symbols to connect the label and corresponding point? The demo chart looks like this : 回答1: The DataPoint Labels are being placed pretty much automatically and you have only very few options to influence their position. There are SmartLabels but they only allow you to control the behaviour when it comes to avoiding them to

问题 I plotted a logistic curve with its fit using the following codes: data:L50 str(L50) 'data.frame': 10 obs. of 3 variables: $ Length.Class: int 50 60 70 80 90 100 110 120 130 140 $ Total.Ind : int 9 20 18 8 4 4 1 0 1 2 $ Mature.Ind : int 0 0 6 5 3 2 1 0 1 2 plot(L50$Mature.Ind/L50$Total.Ind ~ L50$Length.Class, data=L50,pch=20,xlab="Length class(cm)",ylab="Proportion of mature individuals") glm.out<-glm(cbind(L50$Mature.Ind, L50$Total.Ind-L50$Mature.Ind) ~ L50$Length.Class,family=binomial(logit

问题 I'm trying to set the back color of each TextBox that is within the rectangle defined between a MouseDown and MouseUp event, where the MouseUp event takes place to the right of and below the MouseDown event. I capture the Points this way: static readonly Color PSEUDO_HIGHLIGHT_COLOR = Color.Gainsboro; private Point selectionStart; private Point selectionEnd; . . . private void flowLayoutPanelGreatGooglyMoogly_MouseDown(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left) {

问题 I am attempting to be create a polygon table of hexagons, with a name for each hexagon (e.g. Hex1, Hex2, etc...) and join the polygon table to a table of records that have x and y coordinates if the coordinates fall within a polygon. Creating the hex table with the code below, when ran in isolation, seems to be working (except for some of my numbers being off, creating some overlap) DECLARE @Hex TABLE --Create table to old hexagons (PointGeom geometry, Hex varchar(6)) INSERT INTO @Hex -

问题 In a OpenCV C++ program I have a function with this body. for (int ii=0; ii< static_cast<int>(parks.size()); ii++) { PolygonVertices temp = parks.at(ii).getPoly(); const Point *pts = (const cv::Point*) Mat(parks.at(ii).getPoly()).data; int npts = Mat(parks.at(ii).getPoly()).rows; for (int jj=0; jj<npts; jj++) { cout<<"----"<<jj<<"----"<<endl; cout<<"x: "<<pts[jj].x<<", y: "<<pts[jj].y<<endl; cout<<"x: "<<temp[jj].x<<", y: "<<temp[jj].y<<endl; cout<<"--------"<<endl; } } } Polygonvertices is a