Module org.jhotdraw8.geom
Package org.jhotdraw8.geom

Class FXTransforms

java.lang.Object
org.jhotdraw8.geom.FXTransforms
public class FXTransforms extends Object
Transforms.
Author:
Werner Randelshofer

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final javafx.scene.transform.Transform
    IDENTITY
    'Immutable' identity transform.

  • Method Summary

    Modifier and Type
    Method
    Description
    static javafx.scene.transform.Transform
    concat(@Nullable javafx.scene.transform.Transform... transforms)
     
    static javafx.scene.transform.Transform
    createProjectPointOnLineTransform(double x1, double y1, double x2, double y2)
    Creates a transformation matrix, which projects a point onto the given line.
    static javafx.scene.transform.Transform
    createReshapeTransform(double sx, double sy, double sw, double sh, double dx, double dy, double dw, double dh)
     
    static javafx.scene.transform.Transform
    createReshapeTransform(javafx.geometry.Bounds src, double destX, double destY, double destW, double destH)
     
    static javafx.scene.transform.Transform
    createReshapeTransform(javafx.geometry.Bounds src, javafx.geometry.Bounds dest)
     
    static javafx.scene.transform.Transform
    createReshapeTransform(javafx.geometry.Rectangle2D src, double destX, double destY, double destW, double destH)
     
    static List<javafx.scene.transform.Transform>
    decompose(javafx.scene.transform.Transform transform)
    Decomposes the given transformation matrix into rotation, followed by scale and then translation.
    static javafx.geometry.Point2D
    deltaTransform(@Nullable javafx.scene.transform.Transform t, double x, double y)
     
    static javafx.geometry.Point2D
    deltaTransform(@Nullable javafx.scene.transform.Transform t, javafx.geometry.Point2D p)
     
    static javafx.geometry.Point2D
    inverseDeltaTransform(@Nullable javafx.scene.transform.Transform t, double x, double y)
     
    static javafx.geometry.Point2D
    inverseDeltaTransform(@Nullable javafx.scene.transform.Transform t, javafx.geometry.Point2D p)
     
    static boolean
    isIdentityOrNull(@Nullable javafx.scene.transform.Transform t)
     
    static javafx.geometry.Point2D
    projectPointOnLine(double ax, double ay, double x1, double y1, double x2, double y2)
     
    static javafx.scene.transform.Transform
    rotate(double tangentX, double tangentY, double pivotX, double pivotY)
    Rotates from tangent vector.
    static javafx.scene.transform.Transform
    rotate(javafx.geometry.Point2D tangent, javafx.geometry.Point2D pivot)
    Rotates from tangent vector.
    static @Nullable AffineTransform
    toAwt(@Nullable javafx.scene.transform.Transform t)
     
    static javafx.geometry.Point2D
    transform(@Nullable javafx.scene.transform.Transform tx, double x, double y)
     
    static javafx.geometry.Bounds
    transform(@Nullable javafx.scene.transform.Transform tx, javafx.geometry.Bounds b)
     
    static javafx.geometry.Point2D
    transform(@Nullable javafx.scene.transform.Transform tx, javafx.geometry.Point2D b)
     
    static void
    transform2DPoints(javafx.scene.transform.Transform t, double[] srcPts, int srcOff, double[] dstPts, int dstOff, int numPts)
     
    static javafx.geometry.Bounds
    transformedBoundingBox(@Nullable javafx.scene.transform.Transform t, javafx.geometry.Bounds b)
    Computes the bounding box in parent coordinates

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details

    • IDENTITY

      public static final javafx.scene.transform.Transform IDENTITY
      'Immutable' identity transform.

      JavaFX Transforms are not actually immutable. Do not change the value of this transform!

  • Method Details

    • concat

      public static javafx.scene.transform.Transform concat(@Nullable javafx.scene.transform.Transform... transforms)

    • createReshapeTransform

      public static javafx.scene.transform.Transform createReshapeTransform(javafx.geometry.Bounds src, javafx.geometry.Bounds dest)

    • createReshapeTransform

      public static javafx.scene.transform.Transform createReshapeTransform(javafx.geometry.Bounds src, double destX, double destY, double destW, double destH)

    • createReshapeTransform

      public static javafx.scene.transform.Transform createReshapeTransform(javafx.geometry.Rectangle2D src, double destX, double destY, double destW, double destH)

    • createReshapeTransform

      public static javafx.scene.transform.Transform createReshapeTransform(double sx, double sy, double sw, double sh, double dx, double dy, double dw, double dh)

    • decompose

      public static List<javafx.scene.transform.Transform> decompose(javafx.scene.transform.Transform transform)
      Decomposes the given transformation matrix into rotation, followed by scale and then translation. Returns the matrix if the decomposition fails. Returns an empty list if the transform is the identity matrix.
      Parameters:
      transform - a transformation
      Returns:
      decomposed transformation

    • deltaTransform

      public static javafx.geometry.Point2D deltaTransform(@Nullable javafx.scene.transform.Transform t, double x, double y)

    • deltaTransform

      public static javafx.geometry.Point2D deltaTransform(@Nullable javafx.scene.transform.Transform t, javafx.geometry.Point2D p)

    • inverseDeltaTransform

      public static javafx.geometry.Point2D inverseDeltaTransform(@Nullable javafx.scene.transform.Transform t, double x, double y)

    • inverseDeltaTransform

      public static javafx.geometry.Point2D inverseDeltaTransform(@Nullable javafx.scene.transform.Transform t, javafx.geometry.Point2D p)

    • toAwt

      public static @Nullable AffineTransform toAwt(@Nullable javafx.scene.transform.Transform t)

    • transform

      public static javafx.geometry.Bounds transform(@Nullable javafx.scene.transform.Transform tx, javafx.geometry.Bounds b)

    • transform

      public static javafx.geometry.Point2D transform(@Nullable javafx.scene.transform.Transform tx, javafx.geometry.Point2D b)

    • transform

      public static javafx.geometry.Point2D transform(@Nullable javafx.scene.transform.Transform tx, double x, double y)

    • rotate

      public static javafx.scene.transform.Transform rotate(javafx.geometry.Point2D tangent, javafx.geometry.Point2D pivot)
      Rotates from tangent vector.

      A tangent vector pointing to (1,0) results in an identity matrix.

      Parameters:
      tangent - a tangent vector
      pivot - the pivot of the rotation
      Returns:
      a rotation transform

    • rotate

      public static javafx.scene.transform.Transform rotate(double tangentX, double tangentY, double pivotX, double pivotY)
      Rotates from tangent vector.

      A tangent vector pointing to (1,0) results in an identity matrix.

      Parameters:
      tangentX - a tangent vector
      tangentY - a tangent vector
      pivotX - the pivot of the rotation
      pivotY - the pivot of the rotation
      Returns:
      a rotation transform

    • createProjectPointOnLineTransform

      public static javafx.scene.transform.Transform createProjectPointOnLineTransform(double x1, double y1, double x2, double y2)
      Creates a transformation matrix, which projects a point onto the given line. The projection is orthogonal to the line. The point will not be clipped off by the line.

      Formula: b = project(a, p1,p2) 

        v = p2 - p1;
  b = vvT / vTv * (a - p1) + p1;
  b = [ vvT / vTv | vvT / vTv * p1 ] * a; // 2 by 3 matrix
      Parameters:
      x1 - x-coordinate of p1 of the line
      y1 - y-coordinate of p1 of the line
      x2 - x-coordinate of p2 of the line
      y2 - y-coordinate of p2 of the line
      Returns:
      the transformation matrix

    • projectPointOnLine

      public static javafx.geometry.Point2D projectPointOnLine(double ax, double ay, double x1, double y1, double x2, double y2)

    • isIdentityOrNull

      public static boolean isIdentityOrNull(@Nullable javafx.scene.transform.Transform t)

    • transform2DPoints

      public static void transform2DPoints(javafx.scene.transform.Transform t, double[] srcPts, int srcOff, double[] dstPts, int dstOff, int numPts)

    • transformedBoundingBox

      public static javafx.geometry.Bounds transformedBoundingBox(@Nullable javafx.scene.transform.Transform t, javafx.geometry.Bounds b)
      Computes the bounding box in parent coordinates
      Parameters:
      b - a box in local coordinates
      Returns:
      bounding box in parent coordinates