Package org.eclipse.gef.geometry.planar

Class QuadraticCurve

java.lang.Object
org.eclipse.gef.geometry.planar.BezierCurve
org.eclipse.gef.geometry.planar.QuadraticCurve
All Implemented Interfaces:
Serializable, Cloneable, ICurve, IGeometry, IRotatable<BezierCurve>, IScalable<BezierCurve>, ITranslatable<BezierCurve>
public class QuadraticCurve extends BezierCurve
Represents the geometric shape of a quadratic Bézier curve.
See Also:

  • Constructor Details

    • QuadraticCurve

      public QuadraticCurve(double... coordinates)
      Constructs a new QuadraticCurve from the given sequence of x- and y-coordinates of the start-, the control-, and the end-point.
      Parameters:
      coordinates - a sequence containing the x- and y-coordinates
      See Also:

    • QuadraticCurve

      public QuadraticCurve(double x1, double y1, double ctrlX, double ctrlY, double x2, double y2)
      Constructs a new QuadraticCurve object from the given point coordinates.
      Parameters:
      x1 - the start point's x-coordinate
      y1 - the start point's y-coordinate
      ctrlX - the control point's x-coordinate
      ctrlY - the control point's y-coordinate
      x2 - the end point's x-coordinate
      y2 - the end point's y-coordinate

    • QuadraticCurve

      public QuadraticCurve(Point... points)
      Constructs a new QuadraticCurve from the given sequence of Points formed by start-, control-, and end-point.
      Parameters:
      points - the control Points
      See Also:

    • QuadraticCurve

      public QuadraticCurve(Point p1, Point pCtrl, Point p2)
      Constructs a new QuadraticCurve object from the given points.
      Parameters:
      p1 - the start point
      pCtrl - the control point
      p2 - the end point

  • Method Details

    • getCopy

      public QuadraticCurve getCopy()
      Returns a new QuadraticCurve, which has the same start, end, and control point coordinates as this one.
      Specified by:
      getCopy in interface IGeometry
      Overrides:
      getCopy in class BezierCurve
      Returns:
      a new QuadraticCurve with the same start, end, and control point coordinates

    • getCtrl

      public Point getCtrl()
      Get the control point.
      Returns:
      a Point object representing the control point

    • getCtrlX

      public double getCtrlX()
      Get the control point's x-coordinate.
      Returns:
      the control point's x-coordinate

    • getCtrlY

      public double getCtrlY()
      Get the control point's y-coordinate.
      Returns:
      the control point's y-coordinate

    • getElevated

      public CubicCurve getElevated()
      Degree elevation: Returns a CubicCurve representation of this QuadraticCurve.
      Overrides:
      getElevated in class BezierCurve
      Returns:
      A CubicCurve that represents this QuadraticCurve.

    • getTransformed

      public QuadraticCurve getTransformed(AffineTransform t)
      Default implementation returning a transformed Path representation of this IGeometry. Subclasses may override this method to return a more specific representation.
      Specified by:
      getTransformed in interface IGeometry
      Overrides:
      getTransformed in class BezierCurve
      Parameters:
      t - The AffineTransform to be applied
      Returns:
      a transformed Path representation of this IGeometry
      See Also:

    • setCtrl

      public QuadraticCurve setCtrl(Point ctrl)
      Sets the curve's control point.
      Parameters:
      ctrl - The new curve's control point.
      Returns:
      this for convenience

    • setCtrlX

      public QuadraticCurve setCtrlX(double ctrlX)
      Sets the x-coordinate of the curve's control point.
      Parameters:
      ctrlX - The new x-coordinate of the curve's control point.
      Returns:
      this for convenience

    • setCtrlY

      public QuadraticCurve setCtrlY(double ctrlY)
      Sets the y-coordinate of the curve's control point.
      Parameters:
      ctrlY - The y-coordinate of the curve's control point.
      Returns:
      this for convenience

    • split

      public QuadraticCurve[] split(double t)
      Splits this QuadraticCurve using the de Casteljau algorithm at parameter t into two separate QuadraticCurve objects. The returned QuadraticCurves are the curves for [0, t] and [t, 1].
      Overrides:
      split in class BezierCurve
      Parameters:
      t - in range [0,1]
      Returns:
      two QuadraticCurve objects constituting the original curve: 1. [0, t] 2. [t, 1]

    • toPath

      public Path toPath()
      Transform the QuadraticCurve object to a Path object with the same shape.
      Specified by:
      toPath in interface IGeometry
      Overrides:
      toPath in class BezierCurve
      Returns:
      a Path object representing the curve

    • toString

      public String toString()
      Overrides:
      toString in class BezierCurve

    • clone

      public Object clone()
      Overridden with public visibility as recommended within Cloneable .
      Overrides:
      clone in class Object

    • hashCode

      public final int hashCode()
      Overrides:
      hashCode in class Object
      See Also:

    • touches

      public boolean touches(IGeometry g)
      Description copied from interface: IGeometry
      Returns true if the input IGeometry touches this IGeometry, i.e. there is at least one common point.
      Specified by:
      touches in interface IGeometry
      Parameters:
      g - The IGeometry for the intersection test
      Returns:
      true if the input IGeometry and this IGeometry have at least one common point.