Java Code Examples for java.awt.geom.Path2D

/**
 * Create a thin (1 mm wide) rectangle path representing a line.
 * 
 * @param line the line.
 * @return rectangle path for the line.
 */
private static Path2D createLinePath(Line2D line) {

	// Make rectangle width 1mm.
	double width = .001D;
	double length = line.getP1().distance(line.getP2());
	double centerX = (line.getX1() + line.getX2()) / 2D;
	double centerY = (line.getY1() + line.getY2()) / 2D;

	double x1 = centerX - (width / 2D);
	double y1 = centerY - (length / 2D);
	Rectangle2D lineRect = new Rectangle2D.Double(x1, y1, width, length);

	double facing = getDirection(line.getP1(), line.getP2());

	Path2D rectPath = getPathFromRectangleRotation(lineRect, facing);

	return rectPath;
}
 

static void testAddQuad(Path2D pathA, boolean isEmpty) {
    try {
        addQuads(pathA);
    }
    catch (IllegalPathStateException ipse) {
        if (isEmpty) {
            log("testAddQuad: passed "
                + "(expected IllegalPathStateException catched).");
            return;
        } else {
            throw ipse;
        }
    }
    if (isEmpty) {
        throw new IllegalStateException("IllegalPathStateException not thrown !");
    }
    log("testAddQuad: passed.");
}
 

private void renderNorthArrow(double[] pt0,double[] pt1){
//
double 
  da=GD.getDirection_PointPoint(pt0[0],pt0[1],pt1[0],pt1[1]),
  dright=GD.normalizeDirection(da+GD.HALFPI),
  dleft=GD.normalizeDirection(da-GD.HALFPI);
double[] 
  p0=GD.getPoint_PointDirectionInterval(pt0[0],pt0[1],da,ARROWOFFSET0),
  p1=GD.getPoint_PointDirectionInterval(p0[0],p0[1],da,ARROWSHAFTLENGTH),
  p2=GD.getPoint_PointDirectionInterval(p1[0],p1[1],da,ARROWHEADLENGTH),
  pleft=GD.getPoint_PointDirectionInterval(p1[0],p1[1],dleft,ARROWHEADWIDTH),
  pright=GD.getPoint_PointDirectionInterval(p1[0],p1[1],dright,ARROWHEADWIDTH);
Path2D path=new Path2D.Double();
path.moveTo(p0[0],p0[1]);
path.lineTo(p1[0],p1[1]);
graphics.setStroke(createStroke(STROKETHICKNESS2*imagescale));
graphics.draw(path);
path=new Path2D.Double();
path.moveTo(p2[0],p2[1]);
path.lineTo(pleft[0],pleft[1]);
path.lineTo(pright[0],pright[1]);
path.closePath();
graphics.fill(path);}
 

static void testAddCubic(Path2D pathA, boolean isEmpty) {
    try {
        addCubics(pathA);
    }
    catch (IllegalPathStateException ipse) {
        if (isEmpty) {
            log("testAddCubic: passed "
                + "(expected IllegalPathStateException catched).");
            return;
        } else {
            throw ipse;
        }
    }
    if (isEmpty) {
        throw new IllegalStateException("IllegalPathStateException not thrown !");
    }
    log("testAddCubic: passed.");
}
 

static void testAddCubic(Path2D pathA, boolean isEmpty) {
    try {
        addCubics(pathA);
    }
    catch (IllegalPathStateException ipse) {
        if (isEmpty) {
            log("testAddCubic: passed "
                + "(expected IllegalPathStateException catched).");
            return;
        } else {
            throw ipse;
        }
    }
    if (isEmpty) {
        throw new IllegalStateException("IllegalPathStateException not thrown !");
    }
    log("testAddCubic: passed.");
}
 

private GeneralPath getShape(int index) {
	Random r = new Random(index * 100000);
	GeneralPath path = new GeneralPath(
			r.nextBoolean() ? Path2D.WIND_EVEN_ODD : Path2D.WIND_NON_ZERO);
	path.moveTo(r.nextFloat() * 100, r.nextFloat() * 100);
	for (int a = 0; a < 3; a++) {
		int k;
		if (type.getSelectedIndex() == 0) {
			k = r.nextInt(3);
		} else {
			k = type.getSelectedIndex() - 1;
		}

		if (k == 0) {
			path.lineTo(r.nextFloat() * 100, r.nextFloat() * 100);
		} else if (k == 1) {
			path.quadTo(r.nextFloat() * 100, r.nextFloat() * 100,
					r.nextFloat() * 100, r.nextFloat() * 100);
		} else {
			path.curveTo(r.nextFloat() * 100, r.nextFloat() * 100,
					r.nextFloat() * 100, r.nextFloat() * 100,
					r.nextFloat() * 100, r.nextFloat() * 100);
		}
	}
	return path;
}
 

@Override
public void draw(DrawRequest r) {
    Graphics2D g = r.getGraphics();
    Decoration d = r.getDecoration();
    Path2D shape = new Path2D.Double();
    float w = (float) strokeWidth / 4.0f;

    if (spanningTree == null) {
        HashSet<Point2D> points = new HashSet<>();
        Collection<VisualBundledTransition> transitions = ((VisualPolicy) r.getModel()).getTransitionsOfBundle(this);
        for (VisualBundledTransition t: transitions) {
            Point2D point = TransformHelper.getTransformToRoot(t).transform(t.getCenter(), null);
            points.add(point);
        }
        spanningTree = buildSpanningTree(points);
    }
    for (Line2D l: spanningTree) {
        shape.moveTo(l.getX1(), l.getY1());
        shape.lineTo(l.getX2(), l.getY2());
    }
    g.setColor(ColorUtils.colorise(color, d.getColorisation()));
    g.setStroke(new BasicStroke(w, BasicStroke.CAP_SQUARE, BasicStroke.JOIN_MITER, 1.0f, new float[]{10 * w, 10 * w}, 0.0f));
    g.draw(shape);
}
 

private void renderArrowHead(Graphics2D graphics,GlyphSystemModel glyphsystemmodel,Color color){
graphics.setPaint(color);
DPoint 
  p0=glyphsystemmodel.glyphpath.get(glyphsystemmodel.glyphpath.size()-2),
  p1=glyphsystemmodel.glyphpath.get(glyphsystemmodel.glyphpath.size()-1);
double forward=p0.getDirection(p1);
DPoint 
  forewardpoint=p1.getPoint(
    forward,
    UI.EDITJIG_EDITSECTIONS_GLYPHARROWLENGTH*UI.EDITJIG_EDITSECTIONS_GLYPHINSET),
  leftpoint=p1.getPoint(
    GD.normalizeDirection(forward-GD.HALFPI),
    UI.EDITJIG_EDITSECTIONS_GLYPHARROWWIDTH*UI.EDITJIG_EDITSECTIONS_GLYPHINSET/2),
  rightpoint=p1.getPoint(
    GD.normalizeDirection(forward+GD.HALFPI),
    UI.EDITJIG_EDITSECTIONS_GLYPHARROWWIDTH*UI.EDITJIG_EDITSECTIONS_GLYPHINSET/2);
Path2D triangle=new Path2D.Double();
triangle.moveTo(leftpoint.x,leftpoint.y);
triangle.lineTo(forewardpoint.x,forewardpoint.y);
triangle.lineTo(rightpoint.x,rightpoint.y);
triangle.closePath();
graphics.fill(triangle);}
 

void doShape(SunGraphics2D sg2d, Shape s, boolean isfill) {
    Path2D.Float p2df;
    int transX;
    int transY;
    if (sg2d.transformState <= SunGraphics2D.TRANSFORM_INT_TRANSLATE) {
        if (s instanceof Path2D.Float) {
            p2df = (Path2D.Float)s;
        } else {
            p2df = new Path2D.Float(s);
        }
        transX = sg2d.transX;
        transY = sg2d.transY;
    } else {
        p2df = new Path2D.Float(s, sg2d.transform);
        transX = 0;
        transY = 0;
    }
    try {
        doShape((GDIWindowSurfaceData)sg2d.surfaceData,
                sg2d.getCompClip(), sg2d.composite, sg2d.eargb,
                transX, transY, p2df, isfill);
    } catch (ClassCastException e) {
        throw new InvalidPipeException("wrong surface data type: " + sg2d.surfaceData);
    }
}
 

private Path2D decodePath3() {
    path.reset();
    path.moveTo(decodeX(0.0f), decodeY(1.3333334f));
    path.curveTo(decodeAnchorX(0.0f, 2.678571428571433f), decodeAnchorY(1.3333333730697632f, 8.881784197001252E-16f), decodeAnchorX(1.3678570985794067f, -6.214285714285715f), decodeAnchorY(0.20714285969734192f, -0.03571428571428292f), decodeX(1.3678571f), decodeY(0.20714286f));
    path.lineTo(decodeX(1.5642858f), decodeY(0.20714286f));
    path.curveTo(decodeAnchorX(1.5642857551574707f, 8.329670329670357f), decodeAnchorY(0.20714285969734192f, 0.002747252747249629f), decodeAnchorX(2.5999999046325684f, -5.2857142857142705f), decodeAnchorY(1.3333333730697632f, 0.03571428571428559f), decodeX(2.6f), decodeY(1.3333334f));
    path.lineTo(decodeX(3.0f), decodeY(1.3333334f));
    path.lineTo(decodeX(3.0f), decodeY(1.6666667f));
    path.lineTo(decodeX(2.6f), decodeY(1.6666667f));
    path.curveTo(decodeAnchorX(2.5999999046325684f, -5.321428571428569f), decodeAnchorY(1.6666667461395264f, 0.0357142857142847f), decodeAnchorX(1.5642857551574707f, 8.983516483516496f), decodeAnchorY(2.799999952316284f, 0.03846153846153122f), decodeX(1.5642858f), decodeY(2.8f));
    path.lineTo(decodeX(1.3892857f), decodeY(2.8f));
    path.curveTo(decodeAnchorX(1.389285683631897f, -6.714285714285704f), decodeAnchorY(2.799999952316284f, 0.0f), decodeAnchorX(0.0f, 2.6071428571428568f), decodeAnchorY(1.6666667461395264f, 0.03571428571428559f), decodeX(0.0f), decodeY(1.6666667f));
    path.lineTo(decodeX(0.0f), decodeY(1.3333334f));
    path.closePath();
    return path;
}
 

private static Path2D.Double nearestNeighbour(double[] scaledX, double[] scaledY) {
    Path2D.Double line = new Path2D.Double();
    line.moveTo(scaledX[0], scaledY[0]);
    for (int i = 1; i < scaledY.length; i++) {
        double halfX = scaledX[i - 1] + (scaledX[i] - scaledX[i - 1]) / 2;
        if (!java.lang.Double.isNaN(scaledY[i-1])) {
            line.lineTo(halfX, scaledY[i - 1]);
            if (!java.lang.Double.isNaN(scaledY[i]))
                line.lineTo(halfX, scaledY[i]);
        } else {
            line.moveTo(halfX, scaledY[i]);
        }
    }
    line.lineTo(scaledX[scaledX.length - 1], scaledY[scaledY.length - 1]);
    return line;
}
 

public int getRegion(double x, double y) {
	int stx = getXIndex(x);
	int sty = getYIndex(y);

	if(stx >= xs) {
		stx = xs - 1;
	}
	if(sty >= ys) {
		sty = ys - 1;
	}

       if(stx < 0) {
           stx = 0;
       }
       if(sty < 0) {
           sty = 0;
       }
       
	for(int p: grid[stx][sty].polys) {
		Path2D.Double poly = polygons.get(p);
		if(poly.contains(x, y)) {
			return p;
		}
	}
	return -1;
}
 

static void testGetBounds(Path2D pathA, Path2D pathB) {
    final Rectangle rA = pathA.getBounds();
    final Rectangle rB = pathB.getBounds();

    if (!rA.equals(rB)) {
        throw new IllegalStateException("Bounds are not equals [" + rA
            + "|" + rB + "] !");
    }
    final Rectangle2D r2dA = pathA.getBounds2D();
    final Rectangle2D r2dB = pathB.getBounds2D();

    if (!equalsRectangle2D(r2dA, r2dB)) {
        throw new IllegalStateException("Bounds2D are not equals ["
            + r2dA + "|" + r2dB + "] !");
    }
    log("testGetBounds: passed.");
}
 

static void testAddQuad(Path2D pathA, boolean isEmpty) {
    try {
        addQuads(pathA);
    }
    catch (IllegalPathStateException ipse) {
        if (isEmpty) {
            log("testAddQuad: passed "
                + "(expected IllegalPathStateException catched).");
            return;
        } else {
            throw ipse;
        }
    }
    if (isEmpty) {
        throw new IllegalStateException("IllegalPathStateException not thrown !");
    }
    log("testAddQuad: passed.");
}
 

private void renderBracket(double[] pt0,double[] pt1){
  double 
    dforeward=GD.getDirection_PointPoint(pt0[0],pt0[1],pt1[0],pt1[1]),
    dbackward=GD.normalizeDirection(dforeward-GD.PI),
    dout=GD.normalizeDirection(dforeward+GD.HALFPI);
  double[] 
    b0p0=GD.getPoint_PointDirectionInterval(pt0[0],pt0[1],dout,FISHBRACKETOFFSET),
    b0p1=GD.getPoint_PointDirectionInterval(b0p0[0],b0p0[1],dout,FISHBRACKETSPAN0),
    b0p2=GD.getPoint_PointDirectionInterval(b0p1[0],b0p1[1],dforeward,FISHBRACKETSPAN1),
    b1p0=GD.getPoint_PointDirectionInterval(pt1[0],pt1[1],dout,FISHBRACKETOFFSET),
    b1p1=GD.getPoint_PointDirectionInterval(b1p0[0],b1p0[1],dout,FISHBRACKETSPAN0),
    b1p2=GD.getPoint_PointDirectionInterval(b1p1[0],b1p1[1],dbackward,FISHBRACKETSPAN1);
  //
  graphics.setStroke(createStroke(STROKETHICKNESS2*imagescale));
  Path2D path=new Path2D.Double();
  path.moveTo(b0p0[0],b0p0[1]);
  path.lineTo(b0p1[0],b0p1[1]);
  path.lineTo(b0p2[0],b0p2[1]);
  graphics.draw(path);
  path=new Path2D.Double();
  path.moveTo(b1p0[0],b1p0[1]);
  path.lineTo(b1p1[0],b1p1[1]);
  path.lineTo(b1p2[0],b1p2[1]);
  graphics.draw(path);
  
  
  
}
 

public void DrawPath(SunGraphics2D sg2d, SurfaceData sData,
                     int transx, int transy,
                     Path2D.Float p2df)
{
    PixelWriter pw = GeneralRenderer.createSolidPixelWriter(sg2d, sData);
    ProcessPath.drawPath(
        new PixelWriterDrawHandler(sData, pw, sg2d.getCompClip(),
                                   sg2d.strokeHint),
        p2df, transx, transy
    );
}
 

@Before
public void setUp() throws Exception {
    // Draw a "Z"
    path = new Path2D.Double();
    path.moveTo(0, 0);
    path.lineTo(3, 0);
    path.lineTo(0, 3);
    path.lineTo(3, 3);

    product = new Product("p", "t", 4, 4);
    band = product.addBand("b", "4 * (Y-0.5) + (X-0.5) + 0.1");

    dataSourceConfig = new ProfilePlotPanel.DataSourceConfig();
    SimpleFeatureTypeBuilder ftb = new SimpleFeatureTypeBuilder();
    ftb.setName("ft");
    ftb.add("lat", Double.class);
    ftb.add("lon", Double.class);
    ftb.add("data", Double.class);
    SimpleFeatureType ft = ftb.buildFeatureType();
    DefaultFeatureCollection fc = new DefaultFeatureCollection("id", ft);
    fc.add(new SimpleFeatureImpl(new Object[]{0, 0, 0.3}, ft, new FeatureIdImpl("id1"), false));
    fc.add(new SimpleFeatureImpl(new Object[]{0, 0, 0.5}, ft, new FeatureIdImpl("id2"), false));
    fc.add(new SimpleFeatureImpl(new Object[]{0, 0, 0.7}, ft, new FeatureIdImpl("id3"), false));
    fc.add(new SimpleFeatureImpl(new Object[]{0, 0, 0.1}, ft, new FeatureIdImpl("id4"), false));
    dataSourceConfig.pointDataSource = new VectorDataNode("vd", fc);
    dataSourceConfig.dataField = ft.getDescriptor("data");
    dataSourceConfig.boxSize = 1;
    dataSourceConfig.computeInBetweenPoints = true;
}
 

private Path2D getCurrentSubPath() {
    if (subPaths_.isEmpty()) {
        final Path2D subPath = new Path2D.Double();
        subPaths_.add(subPath);
        return subPath;
    }
    return subPaths_.get(subPaths_.size() - 1);
}
 

static void testEqual(Path2D pathA, Path2D pathB) {
    final PathIterator itA = pathA.getPathIterator(null);
    final PathIterator itB = pathB.getPathIterator(null);

    float[] coordsA = new float[6];
    float[] coordsB = new float[6];

    int n = 0;
    for (; !itA.isDone() && !itB.isDone(); itA.next(), itB.next(), n++) {
        int typeA = itA.currentSegment(coordsA);
        int typeB = itB.currentSegment(coordsB);

        if (typeA != typeB) {
            throw new IllegalStateException("Path-segment[" + n + "] "
                + " type are not equals [" + typeA + "|" + typeB + "] !");
        }
        if (!equalsArray(coordsA, coordsB, getLength(typeA))) {
            throw new IllegalStateException("Path-segment[" + n + "] coords"
                + " are not equals [" + Arrays.toString(coordsA) + "|"
                + Arrays.toString(coordsB) + "] !");
        }
    }
    if (!itA.isDone() || !itB.isDone()) {
        throw new IllegalStateException("Paths do not have same lengths !");
    }
    log("testEqual: " + n + " segments.");
}
 

/**
   Turn a list of coordinates into a shape.
   @param coords The coordinates.
   @return A new shape.
*/
public static Shape coordsToShape(List<GMLCoordinates> coords) {
    Path2D path = new Path2D.Double();
    Iterator<GMLCoordinates> it = coords.iterator();
    GMLCoordinates c = it.next();
    path.moveTo(c.getX(), c.getY());
    while (it.hasNext()) {
        c = it.next();
        path.lineTo(c.getX(), c.getY());
    }
    path.closePath();
    return path;
}
 

public void FillPath(SunGraphics2D sg2d, SurfaceData sData,
                     int transX, int transY,
                     Path2D.Float p2df)
{
    tracePrimitive(target);
    target.FillPath(sg2d, sData, transX, transY, p2df);
}
 

public void DrawPath(SunGraphics2D sg2d, SurfaceData sData,
                     int transx, int transy, Path2D.Float p2df)
{
    PixelWriter pw = GeneralRenderer.createXorPixelWriter(sg2d, sData);
    ProcessPath.drawPath(
        new PixelWriterDrawHandler(sData, pw, sg2d.getCompClip(),
                                   sg2d.strokeHint),
        p2df, transx, transy
    );
}
 

public void DrawPath(SunGraphics2D sg2d, SurfaceData sData,
                     int transx, int transy, Path2D.Float p2df)
{
    PixelWriter pw = GeneralRenderer.createXorPixelWriter(sg2d, sData);
    ProcessPath.drawPath(
        new PixelWriterDrawHandler(sData, pw, sg2d.getCompClip(),
                                   sg2d.strokeHint),
        p2df, transx, transy
    );
}
 

public void DrawPath(SunGraphics2D sg2d, SurfaceData sData,
                     int transX, int transY,
                     Path2D.Float p2df)
{
    tracePrimitive(target);
    target.DrawPath(sg2d, sData, transX, transY, p2df);
}
 

@Override
public void execute(Path2D.Double path, Context ctx){
    double x1 = ctx.getValue(arg1);
    double y1 = ctx.getValue(arg2);
    double x2 = ctx.getValue(arg3);
    double y2 = ctx.getValue(arg4);
    double x3 = ctx.getValue(arg5);
    double y3 = ctx.getValue(arg6);
    path.curveTo(x1, y1, x2, y2, x3, y3);
}
 

private Path2D.Double createPath() {
	Random r = new Random(0);
	int numberOfSegments = 20;
	Path2D.Double p = new Path2D.Double();
	p.moveTo(1000 * r.nextFloat(), 1000 * r.nextFloat());
	for (int b = 0; b < numberOfSegments; b++) {
		p.curveTo(1000 * r.nextFloat(), 1000 * r.nextFloat(),
				1000 * r.nextFloat(), 1000 * r.nextFloat(),
				1000 * r.nextFloat(), 1000 * r.nextFloat());
	}
	p.closePath();
	return p;
}
 

public static boolean fillPath(DrawHandler dhnd, Path2D.Float p2df,
                               int transX, int transY)
{
    FillProcessHandler fhnd = new FillProcessHandler(dhnd);
    if (!doProcessPath(fhnd, p2df, transX, transY)) {
        return false;
    }
    FillPolygon(fhnd, p2df.getWindingRule());
    return true;
}
 

/**
 * Draws a smooth curve through the given array of points.
 *
 * <p>This algorithm is called Spline-Interpolation because the Apache-commons-math library we are
 * using here does not accept values but {@code f(x)=y} with x having to increase all the time the
 * idea behind this is to use a parameter array - the so called index as x array and splitting the
 * points into a x and y coordinates array.
 *
 * <p>Finally those 2 interpolated arrays get unified into a single {@linkplain Point2D} array and
 * drawn to the Map
 *
 * @param graphics The {@linkplain Graphics2D} Object to be drawn on
 * @param points The Knot Points for the Spline-Interpolator aka the joints
 */
private void drawCurvedPath(final Graphics2D graphics, final Point2D[] points) {
  final double[] index = newParameterizedIndex(points);
  final PolynomialSplineFunction xcurve =
      splineInterpolator.interpolate(index, getValues(points, Point2D::getX));
  final double[] xcoords = getCoords(xcurve, index);
  final PolynomialSplineFunction ycurve =
      splineInterpolator.interpolate(index, getValues(points, Point2D::getY));
  final double[] ycoords = getCoords(ycurve, index);
  final List<Path2D> paths = routeCalculator.getAllNormalizedLines(xcoords, ycoords);
  for (final Path2D path : paths) {
    drawTransformedShape(graphics, path);
  }
  // draws the Line to the Cursor on every possible screen, so that the line ends at the cursor no
  // matter what...
  final List<Point2D[]> finishingPoints =
      routeCalculator.getAllPoints(
          new Point2D.Double(xcoords[xcoords.length - 1], ycoords[ycoords.length - 1]),
          points[points.length - 1]);
  final boolean hasArrowEnoughSpace =
      points[points.length - 2].distance(points[points.length - 1]) > ARROW_LENGTH;
  for (final Point2D[] finishingPointArray : finishingPoints) {
    drawTransformedShape(
        graphics, new Line2D.Double(finishingPointArray[0], finishingPointArray[1]));
    if (hasArrowEnoughSpace) {
      drawArrow(graphics, finishingPointArray[0], finishingPointArray[1]);
    }
  }
}
 

/**
 * {@inheritDoc}
 */
public void clip(final RenderingBackend.WindingRule windingRule,
        final com.gargoylesoftware.htmlunit.javascript.host.canvas.Path2D path) {
    if (LOG.isDebugEnabled()) {
        LOG.debug("[" + id_ + "] clip(" + windingRule + ", " + path + ")");
    }

    if (path == null && subPaths_.isEmpty()) {
        graphics2D_.setClip(null);
        return;
    }

    final Path2D currentPath;
    if (path == null) {
        currentPath = subPaths_.get(subPaths_.size() - 1);
    }
    else {
        // currentPath = path.getPath2D();
        currentPath = null;
    }
    currentPath.closePath();

    switch (windingRule) {
        case NON_ZERO:
            currentPath.setWindingRule(Path2D.WIND_NON_ZERO);
            break;
        default:
            currentPath.setWindingRule(Path2D.WIND_EVEN_ODD);
            break;
    }

    graphics2D_.clip(currentPath);
}
 

/**
 * A List of Lines which represent all possible lines on multiple screens size may vary.
 *
 * @param xcoords an array of xCoordinates
 * @param ycoords an array of yCoordinates
 * @return a List of corresponding Lines on every possible screen
 */
public List<Path2D> getAllNormalizedLines(final double[] xcoords, final double[] ycoords) {
  final Path2D path = getNormalizedLines(xcoords, ycoords);
  return MapScrollUtil.getPossibleTranslations(isInfiniteX, isInfiniteY, mapWidth, mapHeight)
      .stream()
      .map(t -> new Path2D.Double(path, t))
      .collect(Collectors.toList());
}