Example usage for java.awt.geom Arc2D getStartPoint

Introduction

In this page you can find the example usage for java.awt.geom Arc2D getStartPoint.

Prototype

public Point2D getStartPoint() 

Source Link

Document

Returns the starting point of the arc.

Usage

From source file:GeometryUtilities.java

public static Vector<Point2D> getCrossings(Arc2D arc0, Point2D arc0Center, Arc2D arc1, Point2D arc1Center) {
    Vector<Point2D> ret = new Vector<Point2D>();

    double distance = arc0Center.distance(arc1Center);
    double radius0Squared = arc0Center.distanceSq(arc0.getStartPoint());
    double radius0 = sqrt(radius0Squared);
    double radius1Squared = arc1Center.distanceSq(arc1.getStartPoint());
    double radius1 = sqrt(radius1Squared);

    if (distance > radius0 + radius1) {
        // There are no solutions because the circles are separate.
    } else if (distance < abs(radius0 - radius1)) {
        // There are no solutions because one circle is contained within the
        // other.
    } else if (distance == 0 && radius0 == radius1) {
        // There are an infinite number of solutions because the circles are
        // coincident.
    } else {// ww  w  .  j  a v a  2 s . c om
        // Calculate the first intersection
        double x0 = arc0Center.getX(), y0 = arc0Center.getY();
        double x1 = arc1Center.getX(), y1 = arc1Center.getY();

        double a = (radius0Squared - radius1Squared + distance * distance) / (2 * distance);
        double h = sqrt(radius0Squared - a * a);

        double x2 = x0 + a * (x1 - x0) / distance;
        double y2 = y0 + a * (y1 - y0) / distance;

        Point2D.Double intersection = new Point2D.Double(x2 + h * (y1 - y0) / distance,
                y2 - h * (x1 - x0) / distance);
        double angle0ToIntersection = toDegrees(atan2(-(intersection.y - y0), intersection.x - x0));
        double angle1ToIntersection = toDegrees(atan2(-(intersection.y - y1), intersection.x - x1));
        if (arc0.containsAngle(angle0ToIntersection) && arc1.containsAngle(angle1ToIntersection))
            ret.add(intersection);

        // If the circles aren't tangential, calculate the second
        // intersection
        if (distance != radius0 + radius1) {
            intersection = new Point2D.Double(x2 - h * (y1 - y0) / distance, y2 + h * (x1 - x0) / distance);
            angle0ToIntersection = toDegrees(atan2(-(intersection.y - y0), intersection.x - x0));
            angle1ToIntersection = toDegrees(atan2(-(intersection.y - y1), intersection.x - x1));
            if (arc0.containsAngle(angle0ToIntersection) && arc1.containsAngle(angle1ToIntersection))
                ret.add(intersection);
        }
    }

    return ret;
}

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From source file:Main.java

public void paint(Graphics g) {
    Graphics2D g2 = (Graphics2D) g;
    int w = getSize().width;
    int h = getSize().height;

    Arc2D arc = new Arc2D.Double(0.0, 0.5, w, h, 0.0, 60.0, Arc2D.CHORD);
    System.out.println(arc.getStartPoint());
    g2.draw(arc);//from  ww  w. ja  v a2  s .  c  o m

    arc = new Arc2D.Float(0.0f, 0.0f, w, h, 80.0f, 110.0f, Arc2D.PIE);

    g2.fill(arc);

    arc = new Arc2D.Float(0.0f, 0.0f, w, h, 210.0f, 130.0f, Arc2D.OPEN);

    g2.draw(arc);
}

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From source file:net.sf.fspdfs.chartthemes.spring.ScaledDialValueIndicator.java

/**
 * Draws the background to the specified graphics device.  If the dial
 * frame specifies a window, the clipping region will already have been
 * set to this window before this method is called.
 *
 * @param g2  the graphics device (<code>null</code> not permitted).
 * @param plot  the plot (ignored here).
 * @param frame  the dial frame (ignored here).
 * @param view  the view rectangle (<code>null</code> not permitted).
 *///from w ww . j  ava 2 s. c o m
public void draw(Graphics2D g2, DialPlot plot, Rectangle2D frame, Rectangle2D view) {

    // work out the anchor point
    Rectangle2D f = DialPlot.rectangleByRadius(frame, getRadius(), this.getRadius());
    Arc2D arc = new Arc2D.Double(f, this.getAngle(), 0.0, Arc2D.OPEN);
    Point2D pt = arc.getStartPoint();

    // calculate the bounds of the template value
    FontMetrics fm = g2.getFontMetrics(this.getFont());
    String s = this.getNumberFormat().format(this.getTemplateValue());
    Rectangle2D tb = TextUtilities.getTextBounds(s, g2, fm);

    // align this rectangle to the frameAnchor
    Rectangle2D bounds = RectangleAnchor.createRectangle(new Size2D(tb.getWidth(), tb.getHeight()), pt.getX(),
            pt.getY(), this.getFrameAnchor());

    // add the insets
    Rectangle2D fb = this.getInsets().createOutsetRectangle(bounds);

    // draw the background
    g2.setPaint(this.getBackgroundPaint());
    g2.fill(fb);

    // draw the border
    g2.setStroke(this.getOutlineStroke());
    g2.setPaint(this.getOutlinePaint());
    g2.draw(fb);

    // now find the text anchor point
    String valueStr = this.getNumberFormat()
            .format(ChartThemesUtilities.getScaledValue(plot.getValue(this.getDatasetIndex()), scale));
    Point2D pt2 = RectangleAnchor.coordinates(bounds, this.getValueAnchor());
    g2.setPaint(this.getPaint());
    g2.setFont(this.getFont());
    TextUtilities.drawAlignedString(valueStr, g2, (float) pt2.getX(), (float) pt2.getY(), this.getTextAnchor());

}

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From source file:net.sf.jasperreports.chartthemes.spring.ScaledDialValueIndicator.java

/**
 * Draws the background to the specified graphics device.  If the dial
 * frame specifies a window, the clipping region will already have been
 * set to this window before this method is called.
 *
 * @param g2  the graphics device (<code>null</code> not permitted).
 * @param plot  the plot (ignored here).
 * @param frame  the dial frame (ignored here).
 * @param view  the view rectangle (<code>null</code> not permitted).
 *///from w ww  .  ja va 2 s  .c  o m
@Override
public void draw(Graphics2D g2, DialPlot plot, Rectangle2D frame, Rectangle2D view) {

    // work out the anchor point
    Rectangle2D f = DialPlot.rectangleByRadius(frame, getRadius(), this.getRadius());
    Arc2D arc = new Arc2D.Double(f, this.getAngle(), 0.0, Arc2D.OPEN);
    Point2D pt = arc.getStartPoint();

    // calculate the bounds of the template value
    FontMetrics fm = g2.getFontMetrics(this.getFont());
    String s = this.getNumberFormat().format(this.getTemplateValue());
    Rectangle2D tb = TextUtilities.getTextBounds(s, g2, fm);

    // align this rectangle to the frameAnchor
    Rectangle2D bounds = RectangleAnchor.createRectangle(new Size2D(tb.getWidth(), tb.getHeight()), pt.getX(),
            pt.getY(), this.getFrameAnchor());

    // add the insets
    Rectangle2D fb = this.getInsets().createOutsetRectangle(bounds);

    // draw the background
    g2.setPaint(this.getBackgroundPaint());
    g2.fill(fb);

    // draw the border
    g2.setStroke(this.getOutlineStroke());
    g2.setPaint(this.getOutlinePaint());
    g2.draw(fb);

    // now find the text anchor point
    String valueStr = this.getNumberFormat()
            .format(ChartThemesUtilities.getScaledValue(plot.getValue(this.getDatasetIndex()), scale));
    Point2D pt2 = RectangleAnchor.coordinates(bounds, this.getValueAnchor());
    g2.setPaint(this.getPaint());
    g2.setFont(this.getFont());
    TextUtilities.drawAlignedString(valueStr, g2, (float) pt2.getX(), (float) pt2.getY(), this.getTextAnchor());

}

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From source file:com.bdb.weather.display.current.WindDirPointer.java

/**
 * Draws the pointer.//from   ww w.j  av  a 2 s  .  c  o m
 * 
 * @param g2 The graphics target.
 * @param plot The plot.
 * @param frame The dial's reference frame.
 * @param view The dial's view.
 */
@Override
public void draw(Graphics2D g2, DialPlot plot, Rectangle2D frame, Rectangle2D view) {
    g2.setPaint(Color.blue);
    g2.setStroke(new BasicStroke(1.0f));
    DialScale scale = plot.getScaleForDataset(getDatasetIndex());
    double value = plot.getValue(getDatasetIndex());
    double angle = scale.valueToAngle(value % 360.0);

    Rectangle2D outerRect = DialPlot.rectangleByRadius(frame, outerRadius, outerRadius);
    Rectangle2D innerRect = DialPlot.rectangleByRadius(frame, outerRadius - innerOffset,
            outerRadius - innerOffset);

    g2.setPaint(getOutlinePaint());
    Arc2D arc1 = new Arc2D.Double(outerRect, angle - (ARC_LENGTH / 2), ARC_LENGTH, Arc2D.OPEN);
    g2.draw(arc1);
    Arc2D arc2 = new Arc2D.Double(innerRect, angle, 0.0, Arc2D.OPEN);
    GeneralPath gp = new GeneralPath();
    gp.moveTo(arc1.getStartPoint().getX(), arc1.getStartPoint().getY());
    gp.lineTo(arc2.getStartPoint().getX(), arc2.getStartPoint().getY());
    gp.lineTo(arc1.getEndPoint().getX(), arc1.getEndPoint().getY());
    g2.draw(gp);
    if (fill) {
        g2.setPaint(getFillPaint());
        g2.fill(gp);
    }
}

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From source file:net.sf.fspdfs.chartthemes.spring.ScaledDialPointer.java

/**
 * Draws the pointer./*from   www . j  a v  a2  s  .c  o  m*/
 *
 * @param g2  the graphics target.
 * @param plot  the plot.
 * @param frame  the dial's reference frame.
 * @param view  the dial's view.
 */
public void draw(Graphics2D g2, DialPlot plot, Rectangle2D frame, Rectangle2D view) {

    g2.setStroke(new BasicStroke(1.0f));
    Rectangle2D lengthRect = DialPlot.rectangleByRadius(frame, this.getRadius(), this.getRadius());
    Rectangle2D widthRect = DialPlot.rectangleByRadius(frame, this.getWidthRadius(), this.getWidthRadius());
    double value = ChartThemesUtilities.getScaledValue(plot.getValue(this.getDatasetIndex()), scale);
    DialScale scale = plot.getScaleForDataset(this.getDatasetIndex());
    double angle = scale.valueToAngle(value);

    Arc2D arc1 = new Arc2D.Double(lengthRect, angle, 0, Arc2D.OPEN);
    Point2D pt1 = arc1.getEndPoint();
    Arc2D arc2 = new Arc2D.Double(widthRect, angle - 90.0, 180.0, Arc2D.OPEN);
    Point2D pt2 = arc2.getStartPoint();
    Point2D pt3 = arc2.getEndPoint();
    Arc2D arc3 = new Arc2D.Double(widthRect, angle - 180.0, 0.0, Arc2D.OPEN);
    Point2D pt4 = arc3.getStartPoint();

    GeneralPath gp = new GeneralPath();
    gp.moveTo((float) pt1.getX(), (float) pt1.getY());
    gp.lineTo((float) pt2.getX(), (float) pt2.getY());
    gp.lineTo((float) pt4.getX(), (float) pt4.getY());
    gp.lineTo((float) pt3.getX(), (float) pt3.getY());
    gp.closePath();
    g2.setPaint(this.fillPaint);
    g2.fill(gp);

    g2.setPaint(this.getOutlinePaint());
    Line2D line = new Line2D.Double(frame.getCenterX(), frame.getCenterY(), pt1.getX(), pt1.getY());
    //      g2.draw(line);

    line.setLine(pt2, pt3);
    g2.draw(line);

    line.setLine(pt3, pt1);
    g2.draw(line);

    line.setLine(pt2, pt1);
    g2.draw(line);

    line.setLine(pt2, pt4);
    g2.draw(line);

    line.setLine(pt3, pt4);
    g2.draw(line);
}

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From source file:net.sf.jasperreports.chartthemes.spring.ScaledDialPointer.java

/**
 * Draws the pointer.//  w  ww  . jav  a  2  s  . c o m
 *
 * @param g2  the graphics target.
 * @param plot  the plot.
 * @param frame  the dial's reference frame.
 * @param view  the dial's view.
 */
@Override
public void draw(Graphics2D g2, DialPlot plot, Rectangle2D frame, Rectangle2D view) {

    g2.setStroke(new BasicStroke(1.0f));
    Rectangle2D lengthRect = DialPlot.rectangleByRadius(frame, this.getRadius(), this.getRadius());
    Rectangle2D widthRect = DialPlot.rectangleByRadius(frame, this.getWidthRadius(), this.getWidthRadius());
    double value = ChartThemesUtilities.getScaledValue(plot.getValue(this.getDatasetIndex()), scale);
    DialScale scale = plot.getScaleForDataset(this.getDatasetIndex());
    double angle = scale.valueToAngle(value);

    Arc2D arc1 = new Arc2D.Double(lengthRect, angle, 0, Arc2D.OPEN);
    Point2D pt1 = arc1.getEndPoint();
    Arc2D arc2 = new Arc2D.Double(widthRect, angle - 90.0, 180.0, Arc2D.OPEN);
    Point2D pt2 = arc2.getStartPoint();
    Point2D pt3 = arc2.getEndPoint();
    Arc2D arc3 = new Arc2D.Double(widthRect, angle - 180.0, 0.0, Arc2D.OPEN);
    Point2D pt4 = arc3.getStartPoint();

    GeneralPath gp = new GeneralPath();
    gp.moveTo((float) pt1.getX(), (float) pt1.getY());
    gp.lineTo((float) pt2.getX(), (float) pt2.getY());
    gp.lineTo((float) pt4.getX(), (float) pt4.getY());
    gp.lineTo((float) pt3.getX(), (float) pt3.getY());
    gp.closePath();
    g2.setPaint(this.fillPaint);
    g2.fill(gp);

    g2.setPaint(this.getOutlinePaint());
    Line2D line = new Line2D.Double(frame.getCenterX(), frame.getCenterY(), pt1.getX(), pt1.getY());
    //      g2.draw(line);

    line.setLine(pt2, pt3);
    g2.draw(line);

    line.setLine(pt3, pt1);
    g2.draw(line);

    line.setLine(pt2, pt1);
    g2.draw(line);

    line.setLine(pt2, pt4);
    g2.draw(line);

    line.setLine(pt3, pt4);
    g2.draw(line);
}

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From source file:org.jfree.experimental.chart.plot.dial.DialTextAnnotation.java

/**
 * Draws the background to the specified graphics device.  If the dial
 * frame specifies a window, the clipping region will already have been 
 * set to this window before this method is called.
 *
 * @param g2  the graphics device (<code>null</code> not permitted).
 * @param plot  the plot (ignored here).
 * @param frame  the dial frame (ignored here).
 * @param view  the view rectangle (<code>null</code> not permitted). 
 *//*www .  jav  a2 s  .c  om*/
public void draw(Graphics2D g2, DialPlot plot, Rectangle2D frame, Rectangle2D view) {

    // work out the anchor point
    Rectangle2D f = DialPlot.rectangleByRadius(frame, this.radius, this.radius);
    Arc2D arc = new Arc2D.Double(f, this.angle, 0.0, Arc2D.OPEN);
    Point2D pt = arc.getStartPoint();
    g2.setPaint(this.paint);
    g2.setFont(this.font);
    TextUtilities.drawAlignedString(this.label, g2, (float) pt.getX(), (float) pt.getY(), this.anchor);

}

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From source file:org.jfree.experimental.chart.plot.dial.DialValueIndicator.java

/**
 * Draws the background to the specified graphics device.  If the dial
 * frame specifies a window, the clipping region will already have been 
 * set to this window before this method is called.
 *
 * @param g2  the graphics device (<code>null</code> not permitted).
 * @param plot  the plot (ignored here).
 * @param frame  the dial frame (ignored here).
 * @param view  the view rectangle (<code>null</code> not permitted). 
 *//*w w w  . j a v a2  s  .  c o m*/
public void draw(Graphics2D g2, DialPlot plot, Rectangle2D frame, Rectangle2D view) {

    // work out the anchor point
    Rectangle2D f = DialPlot.rectangleByRadius(frame, this.radius, this.radius);
    Arc2D arc = new Arc2D.Double(f, this.angle, 0.0, Arc2D.OPEN);
    Point2D pt = arc.getStartPoint();

    // calculate the bounds of the template value
    FontMetrics fm = g2.getFontMetrics(this.font);
    String s = this.formatter.format(this.templateValue);
    Rectangle2D tb = TextUtilities.getTextBounds(s, g2, fm);

    // align this rectangle to the frameAnchor
    Rectangle2D bounds = RectangleAnchor.createRectangle(new Size2D(tb.getWidth(), tb.getHeight()), pt.getX(),
            pt.getY(), this.frameAnchor);

    // add the insets
    Rectangle2D fb = this.insets.createOutsetRectangle(bounds);

    // draw the background
    g2.setPaint(this.backgroundPaint);
    g2.fill(fb);

    // draw the border
    g2.setStroke(this.outlineStroke);
    g2.setPaint(this.outlinePaint);
    g2.draw(fb);

    // now find the text anchor point
    double value = plot.getValue(this.datasetIndex);
    String valueStr = this.formatter.format(value);
    Point2D pt2 = RectangleAnchor.coordinates(bounds, this.valueAnchor);
    g2.setPaint(this.paint);
    g2.setFont(this.font);
    TextUtilities.drawAlignedString(valueStr, g2, (float) pt2.getX(), (float) pt2.getY(), this.textAnchor);

}

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From source file:org.jfree.experimental.chart.plot.dial.StandardDialFrame.java

/**
 * Returns the shape for the window for this dial.  Some dial layers will
 * request that their drawing be clipped within this window.
 *
 * @param frame  the reference frame (<code>null</code> not permitted).
 *
 * @return The shape of the dial's window.
 *//*from   w  w  w  .j av a  2 s  . c om*/
public Shape getWindow(Rectangle2D frame) {

    Rectangle2D innerFrame = DialPlot.rectangleByRadius(frame, this.innerRadius, this.innerRadius);
    Rectangle2D outerFrame = DialPlot.rectangleByRadius(frame, this.outerRadius, this.outerRadius);
    Arc2D inner = new Arc2D.Double(innerFrame, this.startAngle, this.extent, Arc2D.OPEN);
    Arc2D outer = new Arc2D.Double(outerFrame, this.startAngle + this.extent, -this.extent, Arc2D.OPEN);
    GeneralPath p = new GeneralPath();
    Point2D point1 = inner.getStartPoint();
    p.moveTo((float) point1.getX(), (float) point1.getY());
    p.append(inner, true);
    p.append(outer, true);
    p.closePath();
    return p;

}

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