Пример #1
0
 void checkTransformation(String geomStr)
     throws IOException, ParseException, NoninvertibleTransformationException {
   Geometry geom = rdr.read(geomStr);
   AffineTransformation trans = AffineTransformation.rotationInstance(Math.PI / 2);
   AffineTransformation inv = trans.getInverse();
   Geometry transGeom = (Geometry) geom.clone();
   transGeom.apply(trans);
   // System.out.println(transGeom);
   transGeom.apply(inv);
   // check if transformed geometry is equal to original
   boolean isEqual = geom.equalsExact(transGeom, 0.0005);
   assertTrue(isEqual);
 }
Пример #2
0
  /**
   * Checks that a transformation produces the expected result
   *
   * @param x the input pt x
   * @param y the input pt y
   * @param trans the transformation
   * @param xp the expected output x
   * @param yp the expected output y
   */
  void checkTransformation(double x, double y, AffineTransformation trans, double xp, double yp) {
    Coordinate p = new Coordinate(x, y);
    Coordinate p2 = new Coordinate();
    trans.transform(p, p2);
    assertEquals(xp, p2.x, .00005);
    assertEquals(yp, p2.y, .00005);

    // if the transformation is invertible, test the inverse
    try {
      AffineTransformation invTrans = trans.getInverse();
      Coordinate pInv = new Coordinate();
      invTrans.transform(p2, pInv);
      assertEquals(x, pInv.x, .00005);
      assertEquals(y, pInv.y, .00005);

      double det = trans.getDeterminant();
      double detInv = invTrans.getDeterminant();
      assertEquals(det, 1.0 / detInv, .00005);

    } catch (NoninvertibleTransformationException ex) {
    }
  }