Class GeometricUtilities

Method Details

• calcRotationAngleInDegrees

  public static double calcRotationAngleInDegrees​(double centerX, double centerY, double targetX, double targetY)

• calcRotationAngleInDegrees

  public static double calcRotationAngleInDegrees​(java.awt.geom.Point2D centerPt, java.awt.geom.Point2D targetPt)

  Calculates the angle from centerPt to targetPt in degrees. The return should range from [0,360), rotating CLOCKWISE, 0 and 360 degrees represents NORTH, 90 degrees represents EAST, etc... Assumes all points are in the same coordinate space. If they are not, you will need to call SwingUtilities.convertPointToScreen or equivalent on all arguments before passing them to this function.

  Parameters:

  centerPt - Point we are rotating around.

  targetPt - Point we want to calcuate the angle to.

  Returns:

  angle in degrees. This is the angle from centerPt to targetPt.

• contains

  public static boolean contains​(java.awt.geom.Rectangle2D rectangle, java.awt.geom.Point2D p)

  Contains.

  Parameters:

  rectangle - the rectangle

  p - the p

  Returns:

  true, if successful

• distance

  public static double distance​(double p1X, double p1Y, double p2X, double p2Y)

• distance

  public static double distance​(java.awt.geom.Point2D p1, java.awt.geom.Point2D p2)

• distance

  public static double distance​(java.awt.geom.Rectangle2D rect, java.awt.geom.Point2D p)

  Distance.

  Parameters:

  rect - the rect

  p - the p

  Returns:

  the double

• extrude

  public static java.awt.geom.Rectangle2D extrude​(java.awt.geom.Rectangle2D rect, double ext)

• equals

  public static boolean equals​(java.awt.geom.Point2D point1, java.awt.geom.Point2D point2, double epsilon)

• getConnectingLines

  public static java.awt.geom.Line2D[] getConnectingLines​(java.awt.geom.Point2D point, java.awt.geom.Point2D[] rectPoints)

• getConstrainingLines

  public static java.util.List<java.awt.geom.Line2D.Double> getConstrainingLines​(java.awt.geom.Area area)

• getDeltaX

  public static float getDeltaX​(double angle)

• getDeltaY

  public static float getDeltaY​(double angle)

• getDeltaX

  public static double getDeltaX​(double angle, double delta)

• getDeltaY

  public static double getDeltaY​(double angle, double delta)

• getIntersectionPoint

  public static java.awt.geom.Point2D getIntersectionPoint​(java.awt.geom.Line2D lineA, java.awt.geom.Line2D lineB)

  Gets the intersection point.

  Parameters:

  lineA - the line a

  lineB - the line b

  Returns:

  the intersection point

• getIntersectionPoint

  public static java.awt.geom.Point2D getIntersectionPoint​(java.awt.geom.Line2D line, java.awt.geom.Rectangle2D rectangle)

  Intersects.

  Parameters:

  line - the line

  rectangle - the rectangle

  Returns:

  the point2 d

• getIntersectionPoints

  public static java.util.List<java.awt.geom.Point2D> getIntersectionPoints​(java.awt.geom.Line2D line, java.awt.geom.Rectangle2D rectangle)

  Gets the intersection points.

  Parameters:

  line - the line

  rectangle - the rectangle

  Returns:

  the intersection points

• getLines

  public static java.awt.geom.Line2D[] getLines​(java.awt.geom.Rectangle2D rectangle)

  Gets the lines.

  Parameters:

  rectangle - the rectangle

  Returns:

  the lines

• getDiagonal

  public static double getDiagonal​(java.awt.geom.Rectangle2D rect)

• getCenter

  public static java.awt.geom.Point2D getCenter​(java.awt.geom.Line2D line)

• getCenter

  public static java.awt.geom.Point2D getCenter​(java.awt.geom.Point2D p1, java.awt.geom.Point2D p2)

• getCenter

  public static java.awt.geom.Point2D getCenter​(double x1, double y1, double x2, double y2)

• getCenter

  public static java.awt.geom.Point2D getCenter​(java.awt.geom.RectangularShape shape)

  Returns the center of a shape whose geometry is defined by a rectangular frame. Works for any subclass of RectuangularShape, including:
  
  Arc2D
  Ellipse2D
  Rectangle2D
  RoundRectangle2D
  
  

  Parameters:

  shape - the shape to retrieve the center of

  Returns:

  a Point2D representing the center of the shape

  See Also:

  RectangularShape

• getCircle

  public static java.awt.geom.Ellipse2D getCircle​(java.awt.geom.Point2D center, double radius)

• getAveragePosition

  public static java.awt.geom.Point2D getAveragePosition​(java.util.Collection<java.awt.geom.Point2D> points)

• getAveragePosition

  public static java.awt.geom.Point2D getAveragePosition​(java.awt.geom.Point2D... points)

• getPerpendicularIntersection

  public static java.awt.geom.Point2D getPerpendicularIntersection​(java.awt.geom.Point2D point, java.awt.geom.Line2D line)

  Gets the perpendicular intersection.

  Parameters:

  point - the point

  line - the line

  Returns:

  the perpendicular intersection

• getPointOnCircle

  public static java.awt.geom.Point2D getPointOnCircle​(java.awt.geom.Point2D center, double radius, double angle)

• getPoints

  public static java.util.List<java.awt.geom.Point2D> getPoints​(java.awt.geom.Path2D path)

• getPoints

  public static java.util.List<java.awt.geom.Point2D> getPoints​(java.awt.geom.Rectangle2D rectangle)

  Gets the points.

  Parameters:

  rectangle - the rectangle

  Returns:

  the points

• getPointsBetweenPoints

  public static java.util.List<java.awt.geom.Point2D> getPointsBetweenPoints​(java.awt.geom.Point2D point1, java.awt.geom.Point2D point2)

  Gets the points between the specified points using the Bresenham algorithm.

  Parameters:

  point1 - the point1

  point2 - the point2

  Returns:

  the points between points

• intersects

  public static boolean intersects​(java.awt.geom.Rectangle2D a, java.awt.geom.Rectangle2D b)

• intersects

  public static boolean intersects​(java.awt.geom.Ellipse2D a, java.awt.geom.Ellipse2D b)

• project

  public static java.awt.geom.Point2D project​(java.awt.geom.Point2D start, double angle, double delta)

  Project a line from a point with a given length and angle, return the point where the line ends.

  Parameters:

  start - The starting point of the projection.

  angle - The angle of the projection in degrees.

  delta - The distance between starting point and end point.

  Returns:

  The Point2D where the projection ends.

• project

  public static java.awt.geom.Point2D project​(java.awt.geom.Point2D start, java.awt.geom.Point2D end, double scalar)

  Projects a point from end along the vector (end - start) by the given scalar amount.

  Parameters:

  start - the start

  end - the end

  scalar - the scalar

  Returns:

  the point2 d. double

• rayCastPoints

  public static java.awt.geom.Point2D[] rayCastPoints​(java.awt.geom.Point2D point, java.awt.geom.Rectangle2D rectangle)

• scaleRect

  public static java.awt.Shape scaleRect​(java.awt.geom.Rectangle2D shape, int max)

• scaleWithRatio

  public static java.awt.geom.Dimension2D scaleWithRatio​(double width, double height, int max)

• scaleShape

  public static java.awt.Shape scaleShape​(java.awt.Shape shape, double scale)

• shapeIntersects

  public static boolean shapeIntersects​(java.awt.Shape shapeA, java.awt.Shape shapeB)

  Shape intersects. WARNING: USE THIS METHOD WITH CAUTION BECAUSE IT IS A VERY SLOW WAY OF CALCULATING INTERSECTIONS.

  Parameters:

  shapeA - the shape a

  shapeB - the shape b

  Returns:

  true, if successful

• translateShape

  public static java.awt.Shape translateShape​(java.awt.Shape shape, java.awt.geom.Point2D newLocation)

• normalizeAngle

  public static double normalizeAngle​(double angle)

  Normalizes the specified angle to the range between 0-360 degree.

  Parameters:

  angle - The angle that will be normalized.

  Returns:

  The normalized angle.