Class Arc


  • final class Arc
    extends PathCommand
    This is a little used SVG function, as most editors will save curves as Béziers. To reduce the need to rely on the Batik library, this functionality is being bypassed for the time being. In the future, it would be nice to extend the GeneralPath command to include the arcTo ability provided by Batik.
    • Field Summary

      Fields 
      Modifier and Type Field Description
      private boolean largeArc  
      private float rx  
      private float ry  
      private boolean sweep  
      private float x  
      private float xAxisRot  
      private float y  
    • Constructor Summary

      Constructors 
      Constructor Description
      Arc​(boolean isRelative, float rx, float ry, float xAxisRot, boolean largeArc, boolean sweep, float x, float y)  
    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void appendPath​(@NotNull java.awt.geom.Path2D path, @NotNull BuildHistory hist)  
      private void arcTo​(@NotNull java.awt.geom.Path2D path, float rx, float ry, float angle, boolean largeArcFlag, boolean sweepFlag, float x, float y, float x0, float y0)
      Adds an elliptical arc, defined by two radii, an angle from the x-axis, a flag to choose the large arc or not, a flag to indicate if we increase or decrease the angles and the final point of the arc.
      private static @NotNull java.awt.geom.Arc2D computeRawArc​(double x0, double y0, double rx, double ry, double angle, boolean largeArcFlag, boolean sweepFlag, double x, double y)
      This constructs a non-rotated Arc2D from the SVG specification of an Elliptical arc.
      java.lang.String toString()  
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
    • Field Detail

      • rx

        private final float rx
      • ry

        private final float ry
      • xAxisRot

        private final float xAxisRot
      • largeArc

        private final boolean largeArc
      • sweep

        private final boolean sweep
      • x

        private final float x
      • y

        private final float y
    • Constructor Detail

      • Arc

        public Arc​(boolean isRelative,
                   float rx,
                   float ry,
                   float xAxisRot,
                   boolean largeArc,
                   boolean sweep,
                   float x,
                   float y)
    • Method Detail

      • appendPath

        public void appendPath​(@NotNull
                               @NotNull java.awt.geom.Path2D path,
                               @NotNull
                               @NotNull BuildHistory hist)
        Specified by:
        appendPath in class PathCommand
      • arcTo

        private void arcTo​(@NotNull
                           @NotNull java.awt.geom.Path2D path,
                           float rx,
                           float ry,
                           float angle,
                           boolean largeArcFlag,
                           boolean sweepFlag,
                           float x,
                           float y,
                           float x0,
                           float y0)
        Adds an elliptical arc, defined by two radii, an angle from the x-axis, a flag to choose the large arc or not, a flag to indicate if we increase or decrease the angles and the final point of the arc.
        Parameters:
        path - The path that the arc will be appended to.
        rx - the x radius of the ellipse
        ry - the y radius of the ellipse
        angle - the angle from the x-axis of the current coordinate system to the x-axis of the ellipse in degrees.
        largeArcFlag - the large arc flag. If true the arc spanning less than or equal to 180 degrees is chosen, otherwise the arc spanning greater than 180 degrees is chosen
        sweepFlag - the sweep flag. If true the line joining center to arc sweeps through decreasing angles otherwise it sweeps through increasing angles
        x - the absolute x coordinate of the final point of the arc.
        y - the absolute y coordinate of the final point of the arc.
        x0 - - The absolute x coordinate of the initial point of the arc.
        y0 - - The absolute y coordinate of the initial point of the arc.
      • computeRawArc

        @NotNull
        private static @NotNull java.awt.geom.Arc2D computeRawArc​(double x0,
                                                                  double y0,
                                                                  double rx,
                                                                  double ry,
                                                                  double angle,
                                                                  boolean largeArcFlag,
                                                                  boolean sweepFlag,
                                                                  double x,
                                                                  double y)
        This constructs a non-rotated Arc2D from the SVG specification of an Elliptical arc. To get the final arc you need to apply a rotation transform such as:

        AffineTransform.getRotateInstance (angle, arc.getX()+arc.getWidth()/2, arc.getY()+arc.getHeight()/2);

        Parameters:
        x0 - origin of arc in x
        y0 - origin of arc in y
        rx - radius of arc in x
        ry - radius of arc in y
        angle - number of radians in arc
        largeArcFlag - the large arc flag
        sweepFlag - the sweep flag
        x - ending coordinate of arc in x
        y - ending coordinate of arc in y
        Returns:
        arc shape
      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object