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Polar

The example pictures below shows the radiation pattern of an antenna. It is based on measurements following a rotation as described in the table on the right.
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Building 3D Polar Charts

Jzy3d Polar Toolbox allows drawing 3d polar charts very easily, as shown by the below sample code (used to draw the antenna radiation above)

// DATA
PolarCoordsLoader loader = new PolarCoordsLoader();
PolarCoords coordinates = loader.loadPolar(FILE, SEPARATOR, 1);
coordinates.setUnit(Unit.Degree);
float offset = coordinates.clean(); // Shift radius if min radius is less than 0

// TESSELATE DRAWABLES
PolarColorMapper colorMapper = new PolarColorMapper(new ColorMapRainbow(), -20, 80, new Color(1, 1, 1, alpha));
PolarTesselator tesselator = new PolarTesselator();
Shape energy = tesselator.tesselateShape(coordinates, colorMapper);
energy.setWireframeWidth(0.01f);
energy.setWireframeDisplayed(true);
energy.setWireframeColor(Color.BLACK.clone().alphaSelf(alpha<1?alpha/2:1));

List drawables = new ArrayList<>();
drawables.add(energy);

// CHART SETUP
Quality q = PolarChartFactory.quality();
q.setPreserveViewportSize(false);

Chart chart = PolarChartFactory.chart(q, FILE, drawables);
chart.getQuality().setSmoothEdge(false); // edit chart quality

PolarAxis axis = (PolarAxis)chart.getView().getAxe();
if(!chart.getQuality().isPreserveViewportSize()){
    axis.getTickDraw().setFontTickMajor(Font.Helvetica_18);
    axis.getTickDraw().setFontTickMinor(Font.Helvetica_12);
}

// View layout
chart.getView().setSquared(false);
PolarAxisLayout layout = (PolarAxisLayout) chart.getAxeLayout();

// azimuth layout
layout.setXAxeLabel("Azim");

// elevation layout
layout.setYAxeLabel("Elev");
layout.setYTickLabelDisplayed(false);

// radius layout, using tick provider for minor radius values
int nMinor = 13;
float minorStep = coordinates.computeRadiusRange() / nMinor;
double[] radials = {offset-3*minorStep, offset-2*minorStep, offset-minorStep, offset};
layout.setZAxeLabel("Rad");
layout.setZTickRenderer(new PolarTickRenderer(-offset, 4));
layout.setZTickProvider(new StaticTickProvider(radials));
									

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