JavaScript Polar Spline Line Chart

1import {
2    PolarMouseWheelZoomModifier,
3    PolarZoomExtentsModifier,
4    PolarPanModifier,
5    PolarNumericAxis,
6    SciChartPolarSurface,
7    EPolarAxisMode, 
8    NumberRange, 
9    EAxisAlignment, 
10    EPolarLabelMode,
11    XyyDataSeries,
12    PolarLegendModifier,
13    SweepAnimation,
14    PolarLineRenderableSeries,
15    BezierRenderDataTransform,
16    XyDataSeries,
17    SplineRenderDataTransform,
18    WaveAnimation,
19} from "scichart";
20import { appTheme } from "../../../theme";
21
22export const drawExample = async (rootElement: string | HTMLDivElement) => {
23    const { sciChartSurface, wasmContext } = await SciChartPolarSurface.create(rootElement, {
24        theme: appTheme.SciChartJsTheme,
25    });
26
27    const radialYAxis = new PolarNumericAxis(wasmContext, {
28        polarAxisMode: EPolarAxisMode.Radial,
29        axisAlignment: EAxisAlignment.Right,
30        visibleRange: new NumberRange(0, 6),
31        drawMinorTickLines: false,
32        drawMajorTickLines: false,
33        useNativeText: true,
34        drawMinorGridLines: false,
35        zoomExtentsToInitialRange: true,
36        labelPrecision: 0,
37        innerRadius: 0.1, // donut hole
38    });
39    sciChartSurface.yAxes.add(radialYAxis);
40
41    const polarXAxis = new PolarNumericAxis(wasmContext, {
42        polarAxisMode: EPolarAxisMode.Angular,
43        axisAlignment: EAxisAlignment.Top,
44
45        polarLabelMode: EPolarLabelMode.Parallel,
46
47        autoTicks: false,
48        majorDelta: 1,
49
50        useNativeText: true,
51        flippedCoordinates: true, // go clockwise
52        totalAngle: Math.PI,
53        labelPrecision: 0,
54    });
55    sciChartSurface.xAxes.add(polarXAxis);
56
57    const ANIMATION_DURATION = 500;
58    const xValues = [0, 1, 2, 3, 4, 5, 6, 7, 8];
59    const yValues = [3, 4, 2, 4, 5, 3, 5, 3, 4];
60
61    // 1. regular polar line
62    const regularPolarLine = new PolarLineRenderableSeries(wasmContext, {
63        dataSeries: new XyDataSeries(wasmContext, {
64            xValues,
65            yValues,
66            dataSeriesName: "Original Data",
67        }),
68        stroke: "white",
69        strokeThickness: 3,
70    });
71
72    // 2. cubic polar line
73    const cubicPolarLine = new PolarLineRenderableSeries(wasmContext, {
74        dataSeries: new XyDataSeries(wasmContext, {
75            xValues,
76            yValues,
77            dataSeriesName: "Cubic",
78        }),
79        stroke: appTheme.VividOrange,
80        strokeThickness: 5,
81        animation: new WaveAnimation({ duration: ANIMATION_DURATION, delay: ANIMATION_DURATION }),
82    });
83    // Add cubic bezier transform
84    const cubicTransform = new SplineRenderDataTransform(
85        cubicPolarLine, 
86        wasmContext, 
87        [cubicPolarLine.drawingProviders[0]]
88    );
89    cubicTransform.interpolationPoints = 30;
90    cubicPolarLine.renderDataTransform = cubicTransform;
91
92    // 3. bezier polar line
93    const bezierPolarLine = new PolarLineRenderableSeries(wasmContext, {
94        dataSeries: new XyDataSeries(wasmContext, {
95            xValues,
96            yValues,
97            dataSeriesName: "Bezier",
98        }),
99        stroke: appTheme.VividPurple,
100        strokeThickness: 5,
101        animation: new WaveAnimation({ duration: ANIMATION_DURATION, delay: 2 * ANIMATION_DURATION })
102    });
103    // Add cubic bezier transform
104    const bezierTransform = new BezierRenderDataTransform(
105        bezierPolarLine, 
106        wasmContext, 
107        [bezierPolarLine.drawingProviders[0]]
108    );
109    bezierTransform.curvature = 0.5;
110    bezierTransform.interpolationPoints = 30;
111    bezierPolarLine.renderDataTransform = bezierTransform;
112    
113    sciChartSurface.renderableSeries.add(regularPolarLine, cubicPolarLine, bezierPolarLine);
114
115    sciChartSurface.chartModifiers.add(
116        new PolarPanModifier(),
117        new PolarZoomExtentsModifier(),
118        new PolarMouseWheelZoomModifier(),
119        new PolarLegendModifier({
120            showCheckboxes: true,
121        })
122    );
123
124    return { sciChartSurface, wasmContext };
125};