JavaScript Polar Mountain Chart

1import {
2    PolarColumnRenderableSeries,
3    PolarMouseWheelZoomModifier,
4    PolarZoomExtentsModifier,
5    PolarPanModifier,
6    XyDataSeries,
7    PolarNumericAxis,
8    SciChartPolarSurface,
9    EColor, 
10    EPolarAxisMode, 
11    NumberRange, 
12    EAxisAlignment, 
13    Thickness, 
14    GradientParams, 
15    Point, 
16    EPolarLabelMode,
17    WaveAnimation,
18    ScaleAnimation,
19    PolarMountainRenderableSeries,
20    PolarLegendModifier
21} from "scichart";
22import { appTheme } from "../../../theme";
23
24const xValues = [0, 1, 2, 3, 4, 5, 6, 7, 8];
25const MountainsDatasets = [
26    {
27        yValues: [2.6, 5.6, 3, 5, 4.8, 1.8, 5, 4.5, 3.5],
28        fillColor: appTheme.VividOrange,
29        interpolateLine: true,
30    },
31    {
32        yValues: [4.2, 2.5, 3.9, 2.5, 4, 5.5, 2.5, 4, 3],
33        fillColor: appTheme.VividTeal,
34        interpolateLine: false,
35    },
36    {
37        yValues: [1.3, 3.3, 2.5, 4.5, 5.5, 3, 4.5, 4.9, 2.4],
38        fillColor: appTheme.VividPink,
39        interpolateLine: false,
40    },
41]
42
43export const drawExample = async (rootElement: string | HTMLDivElement) => {
44    const { sciChartSurface, wasmContext } = await SciChartPolarSurface.create(rootElement, {
45        theme: appTheme.SciChartJsTheme,
46    });
47
48    const radialYAxis = new PolarNumericAxis(wasmContext, {
49        polarAxisMode: EPolarAxisMode.Radial,
50        axisAlignment: EAxisAlignment.Right,
51        visibleRange: new NumberRange(0, 6),
52        drawMinorTickLines: false,
53        drawMajorTickLines: false,
54        useNativeText: true,
55        drawMinorGridLines: false,
56        startAngle: Math.PI / 2,
57        zoomExtentsToInitialRange: true,
58        labelPrecision: 0,
59        labelStyle: {
60            color: "white",
61        },
62    });
63    sciChartSurface.yAxes.add(radialYAxis);
64
65    const polarXAxis = new PolarNumericAxis(wasmContext, {
66        polarAxisMode: EPolarAxisMode.Angular,
67        axisAlignment: EAxisAlignment.Top,
68        polarLabelMode: EPolarLabelMode.Parallel,
69        visibleRange: new NumberRange(0, 9),
70        flippedCoordinates: true, // go clockwise
71        useNativeText: true,
72        startAngle: Math.PI / 2, // start at 12 o'clock
73        zoomExtentsToInitialRange: true,
74        labelPrecision: 0,
75        labelStyle: {
76            color: "white",
77        },
78    });
79    sciChartSurface.xAxes.add(polarXAxis);
80
81    MountainsDatasets.forEach(({yValues, fillColor, interpolateLine}) => {
82        const polarMountain = new PolarMountainRenderableSeries(wasmContext, {
83            dataSeries: new XyDataSeries(wasmContext, {
84                xValues: [...xValues, xValues[xValues.length - 1] + 1], // add 1 more xValue to close the loop
85                yValues: [...yValues, yValues[0]], // close the loop by drawing to the first yValue
86                dataSeriesName: interpolateLine ? "Interpolated" : "Straight",
87            }),
88            fillLinearGradient: new GradientParams(
89                new Point(0, 0), 
90                new Point(0, 1), 
91                [
92                    { color: fillColor + "AA", offset: 0 },
93                    { color: fillColor + "33", offset: 0.3 },
94                ]
95            ),
96            interpolateLine: interpolateLine,
97            stroke: fillColor, // this also gives off the color for the legend marker
98            strokeThickness: 2,
99            animation: new WaveAnimation({ duration: 800, zeroLine: 0 }),
100        });
101        sciChartSurface.renderableSeries.add(polarMountain);
102    })
103
104    sciChartSurface.chartModifiers.add(
105        new PolarPanModifier(),
106        new PolarZoomExtentsModifier(),
107        new PolarMouseWheelZoomModifier(),
108        new PolarLegendModifier({
109            showCheckboxes: true,
110        })
111    );
112
113    return { sciChartSurface, wasmContext };
114};