Package com.luciad.shape.shape2D

Class TLcdLonLatPolyline

java.lang.Object
com.luciad.shape.ALcdShape
com.luciad.shape.shape2D.ALcd2DEditableShape
com.luciad.shape.shape2D.ALcd2DEditablePolypoint
com.luciad.shape.shape2D.TLcdLonLatPolypoint
com.luciad.shape.shape2D.TLcdLonLatPolyline
All Implemented Interfaces:
ILcdBounded, ILcdCurve, ILcdPointList, ILcdPointList2, ILcdPolyline, ILcdPolypoint, ILcdShape, ILcd2DEditablePointList, ILcd2DEditablePolyline, ILcd2DEditablePolypoint, ILcd2DEditableShape, ILcdCache, ILcdCloneable, ILcdInvalidateable, Serializable, Cloneable
Direct Known Subclasses:
TLcdEditableAPP6AObject, TLcdEditableMS2525bObject, TLcdLonLatMPolyline
public class TLcdLonLatPolyline extends TLcdLonLatPolypoint implements ILcd2DEditablePolyline, ILcdCurve
This class provides an implementation of ILcd2DEditablePolyline in the geodetic space. In addition to the properties defined by ILcd2DEditablePolyline, a TLcdLonLatPolyline has an ellipsoid on which it lives.

All longitude/latitude coordinates are expressed in degrees.

This class is thread-safe for concurrent read-only access of its contents. For read-write access, external locking must be used. Such locking is typically done at the model level.

Note that the ILcd2DEditablePointList representing the actual geometry should provide geodetic points (TLcdLonLatPoint), not cartesian (TLcdXYPoint).

See Also:

  • Constructor Details

    • TLcdLonLatPolyline

      public TLcdLonLatPolyline()
      Creates an empty polyline on a default (WGS 84) ellipsoid.

    • TLcdLonLatPolyline

      public TLcdLonLatPolyline(ILcdEllipsoid aEllipsoid)
      Creates an empty polyline on the given ellipsoid.
      Parameters:
      aEllipsoid - the ellipsoid on which to define the polyline

    • TLcdLonLatPolyline

      public TLcdLonLatPolyline(ILcd2DEditablePointList a2DEditablePointList)
      Creates a polyline using the given point list.
      • The point list and the points therein are not copied, and can be modified by this object
      • The point list should contain TLcdLonLatPoints
      The default ellipsoid (WGS 84) is used.
      Parameters:
      a2DEditablePointList - A point list containing lon-lat points.

    • TLcdLonLatPolyline

      public TLcdLonLatPolyline(ILcd2DEditablePointList a2DEditablePointList, ILcdEllipsoid aEllipsoid)
      Creates a polyline using the given point list.
      • The point list and the points therein are not copied, and can be modified by this object
      • The point list should contain TLcdLonLatPoints
      Parameters:
      a2DEditablePointList - A point list containing lon-lat points.
      aEllipsoid - the ellipsoid on which to define the polyline

    • TLcdLonLatPolyline

      public TLcdLonLatPolyline(TLcdLonLatPolyline aLonLatPolyline, boolean aDeepCopy)
      Creates a polyline based on another polyline.
      • When aDeepCopy is true, and the given polyline has a cloneable pointlist (see ILcdCloneable, for example TLcd2DEditablePointList), the underlying points will be cloned.
      • Otherwise, the underlying pointlist is re-used by the new polyline, and updates affect both polylines.
      Parameters:
      aLonLatPolyline - The polyline to copy
      aDeepCopy - whether to make a copy of the points, if possible

  • Method Details

    • getEllipsoid

      public ILcdEllipsoid getEllipsoid()
      Get the ellipsoid used for this polyline.
      Returns:
      the ellipsoid using for this polyline

    • setEllipsoid

      public void setEllipsoid(ILcdEllipsoid aEllipsoid)
      Set the ellipsoid used for this polyline.
      Parameters:
      aEllipsoid - the new ellipsoid

    • calculateBounds

      protected void calculateBounds()
      Description copied from class: ALcd2DEditablePolypoint
      Computes the bounds of the polypoint. The resulting bounds are stored in fBounds.
      Overrides:
      calculateBounds in class TLcdLonLatPolypoint

    • computePointSFCT

      public void computePointSFCT(double aParam, ILcd3DEditablePoint aPointSFCT)
      Description copied from interface: ILcdCurve
      Computes a point of the curve, defined by the given parameter.
      Specified by:
      computePointSFCT in interface ILcdCurve
      Parameters:
      aParam - a value of the closed interval [0,1]
      aPointSFCT - the point to store the computed curve point in

    • getEndPoint

      public ILcdPoint getEndPoint()
      Description copied from interface: ILcdCurve
      Retrieves the end point of the curve.

      This is equivalent to computePointSFCT(1).

      Specified by:
      getEndPoint in interface ILcdCurve
      Returns:
      the end point of the curve

    • getEndTangent2D

      public double getEndTangent2D()
      Description copied from interface: ILcdCurve
      Returns the angle of the curve's tangent at the end point, in degrees counterclockwise from the direction at 3 o'clock.

      The tangent orientation is from the end point, away from the curve before it.

      This is the same as getTangent2D(1).

      Specified by:
      getEndTangent2D in interface ILcdCurve
      Returns:
      the curve's angle in the end point

    • getInterpolation

      public String getInterpolation()
      Description copied from interface: ILcdCurve
      Returns the interpolation method used by this curve.

      A set of predefined constants are defined in this interface, which are used by the default ILcdCurve implementations provided by LuciadLightspeed.

      Custom implementations can define their own constants, and use them to interpret the interpolation of the curve.

      Specified by:
      getInterpolation in interface ILcdCurve
      Returns:
      the interpolation method used by this curve.

    • getLength2D

      public double getLength2D(double aParam1, double aParam2)
      Description copied from interface: ILcdCurve
      Returns the length between two points of the curve, defined by the given parameters.
      • When aParam1 == aParam2, the length is 0.
      • When aParam1 == 0 and aParam2 == 1, the length is the whole length of the curve.
      • When aParam1 > aParam2, the length is (aParam1 to 1) + (0 to aParam2).
      Specified by:
      getLength2D in interface ILcdCurve
      Parameters:
      aParam1 - a value of the closed interval [0,1]
      aParam2 - a value of the closed interval [0,1]
      Returns:
      the length of the curve.

    • getLineSegmentIntersectionCount

      public int getLineSegmentIntersectionCount(ILcdPoint aP1, ILcdPoint aP2)
      Description copied from interface: ILcdCurve
      Returns the number of intersections between this curve and a line segment defined by the two specified points.

      This information can be used to perform containment calculations, if this curve is closed or if this curve is part of a composite closed curve. By determining the number of intersections between this curve and a line segment starting from a given point in a fixed direction, one can determine whether a point is located within the closed curve by using the even-odd rule.

      Specified by:
      getLineSegmentIntersectionCount in interface ILcdCurve
      Parameters:
      aP1 - the first point of the line segment
      aP2 - the second point of the line segment
      Returns:
      the number of intersections between the curve and the line segment

    • getStartPoint

      public ILcdPoint getStartPoint()
      Description copied from interface: ILcdCurve
      Retrieves the start point of the curve.

      This is equivalent to computePointSFCT(0).

      Specified by:
      getStartPoint in interface ILcdCurve
      Returns:
      the start point of the curve

    • getStartTangent2D

      public double getStartTangent2D()
      Description copied from interface: ILcdCurve
      Returns the angle of the curve's tangent at the start point, in degrees counterclockwise from the direction at 3 o'clock.

      The tangent orientation is from the start point towards the rest of the shape.

      This is the same as getTangent2D(0).

      Specified by:
      getStartTangent2D in interface ILcdCurve
      Returns:
      the curve's angle in the start point

    • getTangent2D

      public double getTangent2D(double aParam)
      Description copied from interface: ILcdCurve
      Returns the angle of the curve's tangent in the point defined by the given parameter, in degrees counterclockwise from the direction at 3 o'clock.

      The tangent orientation is from the point at parameter aParam towards the rest of the shape.

      Specified by:
      getTangent2D in interface ILcdCurve
      Parameters:
      aParam - a value of the closed interval [0,1]
      Returns:
      the curve's angle in the point defined by the given parameter

    • contains2D

      public boolean contains2D(ILcdPoint aPoint)
      Description copied from class: ALcdShape
      Checks whether this ALcdShape contains the given point in the 2D cartesian plane.
      Specified by:
      contains2D in interface ILcdShape
      Overrides:
      contains2D in class ALcdShape
      Parameters:
      aPoint - the point to test.
      Returns:
      the boolean result of the containment test.
      See Also:

    • contains2D

      public boolean contains2D(double x, double y)
      Description copied from interface: ILcdShape
      Checks whether this ILcdShape contains the given point in the 2D space. Only the first two dimensions of the ILcdShape are considered.
      Specified by:
      contains2D in interface ILcdShape
      Overrides:
      contains2D in class ALcd2DEditablePolypoint
      Parameters:
      x - the x coordinate of the point.
      y - the y coordinate of the point.
      Returns:
      the boolean result of the containment test.

    • invalidateBounds

      protected void invalidateBounds()
      Overrides:
      invalidateBounds in class ALcd2DEditablePolypoint

    • clone

      public Object clone()
      Creates and returns a copy of this object.

      The contained editable points list is cloned. If cloning is not possible, a warning is sent to the log and a shallow copy is returned.

      The contained ellipsoid is copied without being cloned.

      The cache, the bounds and the focus point are not copied or cloned at all, but recalculated when needed.

      Specified by:
      clone in interface ILcdCloneable
      Overrides:
      clone in class TLcdLonLatPolypoint
      See Also:

    • equals

      public boolean equals(Object aObject)
      Returns whether the given object has the same class, the same focus point, the same coordinates, and the same ellipsoid.
      Overrides:
      equals in class ALcd2DEditablePolypoint

    • hashCode

      public int hashCode()
      Description copied from class: ALcdShape
      The hash code of this shape is the hash code of its class, in order to be consistent with the ALcdShape.equals(Object) method. Extensions should refine this implementation, based on their properties.
      Overrides:
      hashCode in class ALcd2DEditablePolypoint