polygon

问题 I have a sample map layer in this fiddle where the map layer is drawn using fusion table as, var Layer = new google.maps.FusionTablesLayer({ query: { select: 'lat', from: '1BLPDF4n0sW0i0BfD9Yo0DqbshyTH1s5Iuu_1IeU' }, map: map, suppressInfoWindows: true }); How can I draw a polygon programmatically by joining the outermost markers in the map so that if someone add new marker and if it is falling outside the drawn polygon then automatically the polygon should redraw to include the newly added

问题 I want to create a polygon by route direction like here: http://i.imgur.com/olGmuN6.png so I write this: directionService.route(request, function(result, status) { if (status == google.maps.DirectionsStatus.OK) { directionsRenderer.setDirections(result); var r = []; var z = 0.5; var bla = result.routes[0].overview_path; for(var i=0 in result.routes[0].overview_path) { r.push(new google.maps.LatLng(bla[i].lat()+z, bla[i].lng()-z)); } bla.reverse(); for(var x=0 in bla) { r.push(new google.maps

问题 I know how to split and fill areas of a polygon along a horizontal line, if the values are quite simple. x <- 9:15 y1 <- c(5, 6, 5, 4, 5, 6, 5) plot(x, y1, type="l") abline(h=5, col="red", lty=2) polygon(x[c(1:3, 5:7)], y1[c(1:3, 5:7)], col="green") polygon(x[3:5], y1[3:5], col="red") y2 <- c(5, 6, 4, 7, 5, 6, 5) plot(x, y2, type="l") abline(h=5, col="red", lty=2) But how to get the result if the values are a bit more skew? Expected output (photoshopped): 回答1: As pointed out by @Henrik in

问题 I’m using Solr 4.3.0 with an up to date version of JTS and spatial4j. As field type in my schema.xml i’m using “location_rpt” like the description in the documentation. Documentation <field name="standort" type="location_rpt" indexed="true" stored="true" /> Now when my Application create a FilterQuery like this standort:"IsWithin (POLYGON((16.243972778320312 48.27016879304729, 16.411170959472656 48.268340583150504, 16.44275665283203 48.19058119922813, 16.32396697998047 48.15921534239267,16

问题 I have a code that manipulates and renders a QImage onto a QWidget . Manipulation includes typical homogeneous transformations as well as clipping, applying a color-transfer function, etc. Now I have to deform the image onto a four-vertices polygon (a quad), not necessarily a rectangle. To be clear, I'm not talking about clipping the image, but deforming it. I know how to do it using OpenGL (a textured quad), but I wonder if it is possible to do it without switching to OpenGL. Does Qt have

问题 I have one chart and i want to include hover on area but i found it works only on point only. series: [{ name: 'Target', type: 'polygon', data: [[153, 42], [149, 46], [149, 55], [152, 60]], color: Highcharts.Color(Highcharts.getOptions().colors[0]).setOpacity(0.5).get(), enableMouseTracking: true }], tooltip: { headerFormat: '<b>{series.name}</b><br>', pointFormat: '{point.x} cm, {point.y} kg' } http://jsfiddle.net/onhfLqdm/3/ As area is bounded by points so how can i hover area instead of

问题 I have raster of the following features: library(raster) library(rgeos) test <- raster(nrow=225, ncols=478, xmn=-15.8, xmx=32, ymn=-9.4, ymx=13.1) I want to mask in this raster the cells that are within a given distance of a point. I create the spatial points as followed: p2=readWKT("POINT(31.55 -1.05)") Then I create a spatial polygon object by adding a 0.5 buffer: p2_Buffered <- gBuffer(p2, width = 0.5) mask(test, mask=p2_Buffered,inverse=T) When I mask my raster given this spatial object,

问题 I have a list of vertices 3D, creating a polygon. I need to triangulate it and i use the cutting ears algorithm. My polygons are non-convex, so i need to find the concave angles in the polygon. I also dont know wich orientation are my polygons ( clockwise or counter clocwise) Could anyone help me how to determine if is clockwise or counter clockwise Thank you 回答1: It's probably simplest to project the polygon into a convenient plane (say z=0) and then use a method like reinier's. 1) Set all z

问题 I have some 2D points given and i want to draw a polygon using those points. This polygon must pass through all the given points means there is no such point which is inside or outside the polygon. For example: if i have points like: (0,0), (1,1), (-1,-1),(-1,1) and (1,-1) and if i want to draw a polygon using those then my points array should be sorted in following manner: (1,1) -> (1,-1) -> (-1,-1) -> (-1,1) -> (0,0) -> (1,1) OR (1,1) -> (0,0) -> (-1,1) -> (-1,-1) -> (1,-1) -> (1,1) but it

问题 Following this example, why isn't drag event triggering on the polygons in the following code? var data = [ { "index" : 0, "vx" : 0, "vy" : 0, "x" : 842, "y" : 106 }, { "index" : 1, "vx" : 0, "vy" : 0, "x" : 839, "y" : 56 }, { "index" : 2, "vx" : 0, "vy" : 0, "x" : 771, "y" : 72 } ] var svg = d3.select("svg"), width = +svg.attr("width"), height = +svg.attr("height"); var simulation = d3.forceSimulation(data) .force("charge", d3.forceManyBody()) .force("center", d3.forceCenter(width / 2,