/** Returns {@code true} if this direct position is equals to the given object. */
@Override
public boolean equals(final Object object) {
if (object instanceof DirectPosition) {
final DirectPosition other = (DirectPosition) object;
if (other.getCoordinateReferenceSystem() == null) {
return Arrays.equals(ordinates, other.getCoordinate());
}
}
return false;
}
/**
* Executes a linear Interpolation between two positions and returns the DirectPosition at the
* distance 'par' on this straight line
*
* <p>This method is NON-ROBUST, e.g. it might suffer by errors caused by the Floating-point
* arithmetic
*
* @param p0 - start position of linear interpolation
* @param p1 - end position of linear interpolation
* @param par - distance on the straight line, for which to search DirectPosition (from p0 to p1)
* @return Position on the straight line at parameter 'par'
*/
public static DirectPositionImpl linearInterpolate(
DirectPosition p0, DirectPosition p1, double par) {
// Test ok
// 0.0 <= factor <= 1.0
// par = 0 => result = dp0
// par = 1 => result = dp1
double[] coord = AlgoPointND.evaluate(p0.getCoordinates(), p1.getCoordinates(), par);
return new DirectPositionImpl(p0.getCoordinateReferenceSystem(), coord);
}
/**
* Make sure that the specified location uses the same CRS as this one.
*
* @param location
* @throws MismatchedReferenceSystemException if the CRS are incompatible.
*/
protected void ensureCompatibleReferenceSystem(DirectPosition location) {
if (crs != null) {
final CoordinateReferenceSystem other = location.getCoordinateReferenceSystem();
if (other != null) {
if (!CRS.equalsIgnoreMetadata(crs, other)) {
throw new MismatchedReferenceSystemException(
Errors.format(ErrorKeys.MISMATCHED_COORDINATE_REFERENCE_SYSTEM));
}
}
}
}
/** Returns a hash value for the given coordinate. */
static int hashCode(final DirectPosition position) {
final int dimension = position.getDimension();
int code = 1;
for (int i = 0; i < dimension; i++) {
final long bits = Double.doubleToLongBits(position.getOrdinate(i));
code = 31 * code + ((int) (bits) ^ (int) (bits >>> 32));
}
final CoordinateReferenceSystem crs = position.getCoordinateReferenceSystem();
if (crs != null) {
code += crs.hashCode();
}
return code;
}
/**
* Returns {@code true} if the specified object is also a {@linkplain DirectPosition direct
* position} with equals {@linkplain #getCoordinate coordinate} and {@linkplain
* #getCoordinateReferenceSystem CRS}.
*
* @param object The object to compare with this position.
* @return {@code true} if the given object is equals to this position.
*/
@Override
public boolean equals(final Object object) {
if (object instanceof DirectPosition) {
final DirectPosition that = (DirectPosition) object;
final int dimension = getDimension();
if (dimension == that.getDimension()) {
for (int i = 0; i < dimension; i++) {
if (!Utilities.equals(this.getOrdinate(i), that.getOrdinate(i))) {
return false;
}
}
if (Utilities.equals(
this.getCoordinateReferenceSystem(), that.getCoordinateReferenceSystem())) {
assert hashCode() == that.hashCode() : this;
return true;
}
}
}
return false;
}
