polygon

问题 ( EDIT: The rotation doesn't matter too much to me anymore - just the movement. I am still curious and would love to know how to do the rotation however.) def angle_between(p1, p2): ang1 = np.arctan2(*p1[::-1]) ang2 = np.arctan2(*p2[::-1]) return (ang1 - ang2) % (2 * np.pi) class Minion: # Shape: Triangle def __init__(self): self.rotation = 0 self.position = (200,200) self.radius = 50 self.vertices = ((1,1), (10,10), (1,10)) def determine_vertices(self): x = self.position[0] y = self.position

问题 I need to scale a polygon. write the following Qt Code: QPolygonF qpf=QPolygonF(QPolygon(4,points)); QTransform trans; trans=trans.scale(1.5,1.5); QPolygonF qpf2=trans.map(qpf); path.addPolygon(qpf2); for the points: Qt Code: static const int points[8] = { 10, 80, 20, 10, 80, 30, 90, 70 }; it generates ---15,120-- ---30,15-- ---120,45-- ---135,105-- thus it moves slightly too. is there a way to scale from center? for example origin of the shape should be the same point after scaling. is there

问题 I have the code below. It load a CSV file into memory. This file contains the coordinates for different polygons.Each row of this file has X,Y coordinates and a string which tells that to which polygon this datapoint belongs. for example a polygone named "Poly1" with 100 data points has 100 rows in this file like : Poly1,X1,Y1 Poly1,X2,Y2 ... Poly1,X100,Y100 Poly2,X1,Y1 ..... The index.csv file has the number of datapoint(number of rows) for each polygon in file Polygons.csv. These details

问题 Is it possible to create a polygon with Google Maps API where the polygon is completely clear and outside the polygon is shaded? 回答1: If you mean something like a hole, try the suggestions here How to add a "hole" to a Circle Polygon (Google Maps API V3) 来源： https://stackoverflow.com/questions/9804830/google-maps-polygon-outer-fill

问题 I am creating a simple gradient background by drawing a quad as follows: glMatrixMode GL.GL_PROJECTION glLoadIdentity glMatrixMode GL.GL_MODELVIEW glLoadIdentity ***glPolygonMode GL_FRONT_AND_BACK, GL_LINE*** glDisable glcDepthTest glBegin bmQuads glColor4d 1, 0, 0, 1 glVertex2i -1, -1 glVertex2i 1, -1 glColor4d 0, 0, 1, 1 glVertex2i 1, 1 glVertex2i -1, 1 GL.glEnd GL.glEnable glcDepthTest I then set up my viewing matrices and draw my 3D scene. This works as expected when the polygon mode (of

问题 We have multipolygon and where the first polygon will be the biggest one and rest will be smaller ones. We have now managed to do something below. The issue is that we want the rest of the polygon to create like hole effect into the first big polygon. We have read this google maps polygons - overlay but dont get how achieve this. Lots of places they talk about this "inner hole path winding direction needs to be opposite the outer path." How to get this done based on my lat long? var mps = [

问题 I have a data set that contains x and y coordinates of multiple polygons, such as df <- data.frame( xpol = c(0.304147897, 0.272762377, 0.239435395, 0.204166952, 0.166957048, 0.127805683, 0.086712856, 0.043678568, -0.001297181, -0.048214391, -0.097073063, -0.147873196, -0.20061479, -0.255297845, -0.311922362, -0.37048834, -0.430995779, -0.493444679, -0.557835041, -0.624166864, -0.692440148, -0.698421984, -0.629639016, -0.562974508, -0.49842846, -0.436000872, -0.375691745, -0.317501078, -0

问题 I want to create a heatmap of say, provincial population of China and I found this guide to a similar problem here. I have no problem going through the example code though I have to admit that I don't thoroughly understand them all. However when I was trying to mimic the example by using the shapefile of China, the code ran ok till the following df_map = pd.DataFrame({ 'poly': [Polygon(xy) for xy in m.china], 'ward_name': [ward['NAME'] for ward in m.china_info]}) It generates an error that

问题 I'm developing an application in swift 3.0 with the Google Maps SDK. I have to say this is the first time I work with this SDK and it is so I need a little help. I think what I ask you will be easy for you. What I want to do is when the user enters a map editing mode (like this page http://www.birdtheme.org/useful/v3tool.html ). He can do two things: First he could draw polygons on the map (to mark the boundaries of a farmer field). I want the user to press a point on the map and generate a

问题 Currently, I am trying to transition my graphical knowledge from the plot function in R, to the ggplot function. I have began constructing scatterplots and corresponding legends for a given data set, however I want to incorporate the function geom_polygon onto my plots using ggplot . Specifically, I want to capture a triangular region from the origin of a scatterplot. For reproducibility, say I have the following data set: rawdata<-data.frame(matrix(c(1,1,1, 2,1,-1, 3,-1,-1, 4,-1,1, 4,-2,2),5