skyline javascript 創建餅狀圖

 

//創建餅狀圖，根據數學算法...

//使用polygon的wkt座標創建餅狀圖

function createpie() {
                        var sum = 0;
                        var radius = 100;
                        var angle = 0;
                        var i;
                        var color = [0x0000a0, 0x00ff60, 0x8000a0, 0xa0ff00, 0xff00ff, 0xff2000, 0x20c080, 0x402020, 0x8020a0, 0xff6060, 0xc0ffff, 0xff6060, 0x800040, 0xa00020];
                        for (i = 1; i < 10; i++) {
                                sum += i;
                        }
                        var cenpoint = SGWorld.Window.CenterPixelToWorld(0);
                        var cpoint = cenpoint.Position;
                        var sx = SGWorld.CoordServices.MoveCoord(cpoint.X, cpoint.Y, radius, 0).X;
                        var sy = SGWorld.CoordServices.MoveCoord(cpoint.X, cpoint.Y, radius, 0).Y;

                        for (i = 1; i < 10; i++) {
                                var color1 = color[i];
                                var langle = angle + parseFloat(i) / parseFloat(sum) * 360;
                                var east = radius * Math.cos(2 * Math.PI * langle / 360);
                                var north = radius * Math.sin(2 * Math.PI * langle / 360);
                                var movcod = SGWorld.CoordServices.MoveCoord(cpoint.X, cpoint.Y, east, north);
                                var polygon = "POLYGON((" + cpoint.X.toString() + " " + cpoint.Y.toString() + "," + sx.toString() + " " + sy.toString();
                                var spl = (langle - angle) / 2;
                                for (var j = 0; j < spl; j++) {
                                        var sinint = Math.sin((angle + j * 2) * Math.PI / 180) * radius;
                                        var cosint = Math.cos((angle + j * 2) * Math.PI / 180) * radius;
                                        var movcodspl = SGWorld.CoordServices.MoveCoord(cpoint.X, cpoint.Y, cosint, sinint);
                                        polygon += "," + movcodspl.X.toString() + " " + movcodspl.Y.toString();
                                }
                                polygon += "," + movcod.X.toString() + " " + movcod.Y.toString() + "," + cpoint.X.toString() + " " + cpoint.Y.toString() + "))";
                                var igeometry = SGWorld.Creator.GeometryCreator.CreateGeometryFromWKT(polygon);
                                var ipolygon = SGWorld.Creator.CreatePolygon(igeometry, color1, color1, 0, 0, "polygon");
                                ipolygon.FillStyle.Color.SetAlpha(0.5);
                                sx = movcod.X;
                                sy = movcod.Y;
                                angle = langle;
                        }
                }