net.anwiba.spatial.coordinate.CoordinateUtilities Maven / Gradle / Ivy
/*
* #%L
* anwiba spatial
* %%
* Copyright (C) 2007 - 2019 Andreas Bartels
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 2.1 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Lesser Public License for more details.
*
* You should have received a copy of the GNU General Lesser Public
* License along with this program. If not, see
* .
* #L%
*/
// Copyright (c) 2006 by Andreas W. Bartels
package net.anwiba.spatial.coordinate;
import static net.anwiba.commons.utilities.math.MathWrapper.PI;
import static net.anwiba.commons.utilities.math.MathWrapper.abs;
import static net.anwiba.commons.utilities.math.MathWrapper.atan;
import static net.anwiba.commons.utilities.math.MathWrapper.cos;
import static net.anwiba.commons.utilities.math.MathWrapper.log10;
import static net.anwiba.commons.utilities.math.MathWrapper.max;
import static net.anwiba.commons.utilities.math.MathWrapper.min;
import static net.anwiba.commons.utilities.math.MathWrapper.pow;
import static net.anwiba.commons.utilities.math.MathWrapper.sin;
import static net.anwiba.commons.utilities.math.MathWrapper.sqrt;
import net.anwiba.spatial.coordinate.calculator.DefaultCoordinateDistanceCalculator;
import net.anwiba.spatial.coordinate.calculator.ICoordinateDistanceCalculator;
import net.anwiba.spatial.coordinate.calculator.RobustDeterminantCalculator;
import net.anwiba.spatial.coordinate.calculator.SmallPointCalculator;
public class CoordinateUtilities {
public static ICoordinate[] getCoordinates(final ICoordinateSequence sequence) {
final ICoordinate[] coordinates = new ICoordinate[sequence.getNumberOfCoordinates()];
for (int i = 0; i < coordinates.length; i++) {
coordinates[i] = sequence.getCoordinateN(i);
}
return coordinates;
}
public static double calculateArea(final ICoordinateSequence sequence) {
if (sequence == null || sequence.getNumberOfCoordinates() < 3) {
return 0;
}
double sum = 0;
for (int i = 0; i < sequence.getNumberOfCoordinates(); i++) {
final ICoordinate prior = getPrior(sequence, i);
final ICoordinate coordinate = sequence.getCoordinateN(i);
final ICoordinate next = getNext(sequence, i);
sum += coordinate.getXValue() * (prior.getYValue() - next.getYValue());
}
return sum / 2;
}
private static ICoordinate getPrior(final ICoordinateSequence sequence, final int i) {
if (i == 0) {
return sequence.getCoordinateN(sequence.getNumberOfCoordinates() - 1);
}
return sequence.getCoordinateN(i - 1);
}
private static ICoordinate getNext(final ICoordinateSequence sequence, final int i) {
if (i + 1 == sequence.getNumberOfCoordinates()) {
return sequence.getCoordinateN(0);
}
return sequence.getCoordinateN(i + 1);
}
public static double calculateLength(final ICoordinateSequence sequence) {
double sum = 0;
ICoordinate prior = null;
for (final ICoordinate coordinate : sequence.getCoordinates()) {
if (prior != null) {
sum += calculateDistance(prior, coordinate);
}
prior = coordinate;
}
return sum;
}
public static double calculateDistance(final ICoordinate c0, final ICoordinate c1) {
final double sum = pow(c1.getXValue() - c0.getXValue(), 2) + pow(c1.getYValue() - c0.getYValue(), 2);
return sqrt(sum);
}
public static ICoordinate calculateSmallPoint(
final ICoordinate c0,
final ICoordinate c1,
final double s,
final double r) {
return new SmallPointCalculator(c0, c1).calculate(s, r);
}
final static ICoordinateDistanceCalculator coordinateDistanceCalculator = new DefaultCoordinateDistanceCalculator();
public static ICoordinate calculateSmallPoint(final ICoordinate c0, final ICoordinate c1, final double s)
throws CoordinateCalculationException {
final double x0 = c0.getXValue();
final double y0 = c0.getYValue();
if (c1.touch(x0, y0)) {
throw new CoordinateCalculationException("base points are equal"); //$NON-NLS-1$
}
final double x1 = c1.getXValue();
final double y1 = c1.getYValue();
final double d = coordinateDistanceCalculator.calculateDistance(x0, y0, x1, y1);
final double xs = x0 + (x1 - x0) / d * s;
final double ys = y0 + (y1 - y0) / d * s;
if (c0.getDimension() > 2 && c1.getDimension() > 2) {
final double z0 = c0.getZValue();
final double z1 = c1.getZValue();
final double zs = z0 + (z1 - z0) / d * s;
return new Coordinate(xs, ys, zs, false);
}
return new Coordinate(xs, ys);
}
public static ICoordinate calculateBasePoint(
final ICoordinate c0,
final ICoordinate c1,
final ICoordinate coordinate) {
final double x0 = c0.getXValue();
final double y0 = c0.getYValue();
if (c1.touch(x0, y0)) {
return new Coordinate(x0, y0);
}
final double x1 = c1.getXValue();
final double y1 = c1.getYValue();
final double x2 = coordinate.getXValue();
final double y2 = coordinate.getYValue();
if (x0 == x1) {
return new Coordinate(x0, y2);
}
if (y0 == y1) {
return new Coordinate(x2, y0);
}
final double m = (y1 - y0) / (x1 - x0);
final double xs = (m * (y2 - y0) + x2 - x0) / (m * m + 1) + x0;
final double ys = (xs - x0) * m + y0;
return new Coordinate(xs, ys);
}
public static ICoordinate calculateIntersection(
final ICoordinate c0,
final ICoordinate c1,
final ICoordinate c2,
final ICoordinate c3)
throws CoordinateCalculationException {
final double x0 = c0.getXValue();
final double y0 = c0.getYValue();
if (c1.touch(x0, y0)) {
throw new CoordinateCalculationException("base points 0 and 1 are equal"); //$NON-NLS-1$
}
final double x1 = c1.getXValue();
final double y1 = c1.getYValue();
final double x2 = c2.getXValue();
final double y2 = c2.getYValue();
if (c3.touch(x2, y2)) {
throw new CoordinateCalculationException("base points 2 and 3 are equal"); //$NON-NLS-1$
}
final double x3 = c3.getXValue();
final double y3 = c3.getYValue();
if ((x0 == x1 && x2 == x3) || (y0 == y1 && y2 == y3)) {
throw new CoordinateCalculationException("lines are parallel"); //$NON-NLS-1$
}
if (x0 == x1) {
final double m1 = (y3 - y2) / (x3 - x2);
return new Coordinate(x0, y2 + m1 * (x0 - x2));
}
if (x2 == x3) {
final double m0 = (y1 - y0) / (x1 - x0);
return new Coordinate(x2, y0 + m0 * (x3 - x0));
}
final double m0 = (y1 - y0) / (x1 - x0);
final double m1 = (y3 - y2) / (x3 - x2);
final double d = (y0 - y2 - m0 * (x0 - x2)) / (m1 - m0);
return new Coordinate(d + x2, y2 + m1 * d);
}
public static ICoordinate getAvarageCoordinate(final ICoordinate... coordinates) {
if (coordinates.length == 1) {
return coordinates[0];
}
ICoordinate centroid = null;
for (int i = 0; i < coordinates.length; i++) {
final ICoordinate coordinate = coordinates[i];
if (centroid == null) {
centroid = coordinate;
continue;
}
centroid = CoordinateUtilities.getAvarageCoordinate(centroid, coordinate, i + 1);
}
return centroid;
}
public static ICoordinate getAvarageCoordinate(final ICoordinate c0, final ICoordinate c1, final int n) {
if (c0.isMeasured() && c1.isMeasured()) {
final double[] values = new double[min(c0.getDimension(), c1.getDimension()) + 1];
for (int i = 0; i < values.length - 1; i++) {
values[i] = getAvarageValue(c0.getValue(i), c1.getValue(i), n);
}
values[values.length - 1] = getAvarageValue(c0.getMeasuredValue(), c1.getMeasuredValue(), n);
return new Coordinate(values, true);
}
final double[] values = new double[min(c0.getDimension(), c1.getDimension())];
for (int i = 0; i < values.length; i++) {
values[i] = getAvarageValue(c0.getValue(i), c1.getValue(i), n);
}
return new Coordinate(values, false);
}
public static double getAvarageValue(final double m1, final double d, final int n) {
return m1 + ((d - m1) / n);
}
public static boolean isInterior(final ICoordinate c0, final ICoordinate c1, final ICoordinate coordinate) {
final double xmin = min(c0.getXValue(), c1.getXValue());
final double xmax = max(c0.getXValue(), c1.getXValue());
final double xc = coordinate.getXValue();
if (!(xmin <= xc && xc <= xmax)) {
return false;
}
final double ymin = min(c0.getYValue(), c1.getYValue());
final double ymax = max(c0.getYValue(), c1.getYValue());
final double yc = coordinate.getYValue();
if (!(ymin <= yc && yc <= ymax)) {
return false;
}
if (xmin == xmax) {
return true;
}
if (ymin == ymax) {
return true;
}
final double m1 = (c1.getYValue() - c0.getYValue()) / (c1.getXValue() - c0.getXValue());
final double m2 = (yc - c0.getYValue()) / (xc - c0.getXValue());
final double abs = abs(m1 - m2);
return abs < 0.00000001;
}
public static boolean isPointInRing(final ICoordinate coordinate, final ICoordinateSequence ring) {
final double x = coordinate.getXValue();
final double y = coordinate.getYValue();
boolean isInside = false;
ICoordinate previous = null;
for (final ICoordinate next : ring.getCoordinates()) {
if (previous == null) {
previous = next;
continue;
}
final double yp = previous.getYValue();
final double yn = next.getYValue();
if (yp > y && yn <= y || yn > y && yp <= y) {
final double y0 = yp - y;
final double y1 = yn - y;
if (RobustDeterminantCalculator.signOfDet(previous.getXValue() - x, y0, next.getXValue() - x, y1)
/ (y1 - y0) > 0.0) {
if (y == yn) {
continue;
}
isInside = !isInside;
}
}
previous = next;
}
return isInside;
}
public static boolean interact(
final ICoordinate coordinate,
final ICoordinate otherCoordinate,
final double tolerance) {
final double abs = abs(calculateDistance(coordinate, otherCoordinate));
if (Double.isNaN(tolerance) || tolerance == 0) {
final double cLog10 = max(log10(abs(coordinate.getXValue())), log10(abs(coordinate.getYValue())));
final double log10 = log10(abs);
return cLog10 - log10 > 12;
}
return tolerance > abs || (tolerance == 0 && abs == 0);
}
public static boolean isCrossing(
final ICoordinate c0,
final ICoordinate c1,
final ICoordinate c2,
final ICoordinate c3) {
try {
final ICoordinate crossPoint = calculateIntersection(c0, c1, c2, c3);
if (isInsideRectangle(c0, c1, crossPoint) && isInsideRectangle(c2, c3, crossPoint)) {
return true;
}
if ((c0.touch(crossPoint) || c1.touch(crossPoint)) && (c2.touch(crossPoint) || c3.touch(crossPoint))) {
return true;
}
return false;
} catch (final CoordinateCalculationException exception) {
return false;
}
}
public static boolean isInsideRectangle(final ICoordinate c0, final ICoordinate c1, final ICoordinate coordinate) {
final double xmin = min(c0.getXValue(), c1.getXValue());
final double xmax = max(c0.getXValue(), c1.getXValue());
final double xc = coordinate.getXValue();
if (!(xmin <= xc && xc <= xmax)) {
return false;
}
final double ymin = min(c0.getYValue(), c1.getYValue());
final double ymax = max(c0.getYValue(), c1.getYValue());
final double yc = coordinate.getYValue();
if (!(ymin <= yc && yc <= ymax)) {
return false;
}
return true;
}
public static boolean isBetween(
final ICoordinate c0,
final ICoordinate c1,
final ICoordinate coordinate,
final double tolerance) {
if (!EnvelopeUtilities.createEnvelope(EnvelopeUtilities.createEnvelope(c0, c1), tolerance).interact(coordinate)) {
return false;
}
if (interact(coordinate, c0, tolerance)) {
return true;
}
if (interact(coordinate, c1, tolerance)) {
return true;
}
final ICoordinate base = calculateBasePoint(c0, c1, coordinate);
if (interact(coordinate, base, tolerance)) {
if (isInterior(c0, c1, base)) {
return true;
}
}
return false;
}
public static ICoordinate calculatePolarCoordinate(
final ICoordinate coordinate,
final double angel,
final double distance) {
return new Coordinate(
(coordinate.getXValue() + distance * sin(angel)),
(coordinate.getYValue() + distance * cos(angel)));
}
public static double calculateAngle(final ICoordinate c0, final ICoordinate c1) {
final double a = c1.getXValue() - c0.getXValue();
final double b = c1.getYValue() - c0.getYValue();
if (a == 0) {
if (b > 0) {
return 0;
}
return PI;
}
if (b == 0) {
if (a > 0) {
return PI / 2;
}
return PI / 2 * 3;
}
final double alpha = atan(a / b);
if (b < 0) {
return PI + alpha;
}
if (a < 0) {
return PI * 2 + alpha;
}
return alpha;
}
public static ICoordinate getMinimum(final ICoordinate coordinate, final ICoordinate other) {
if (coordinate == null) {
return other;
}
if (other == null) {
return coordinate;
}
final double x = min(coordinate.getXValue(), other.getXValue());
final double y = min(coordinate.getYValue(), other.getYValue());
if (min(coordinate.getDimension(), other.getDimension()) == 2) {
if (coordinate.isMeasured() && other.isMeasured()) {
return new Coordinate(x, y, min(coordinate.getMeasuredValue(), other.getMeasuredValue()), true);
}
return new Coordinate(x, y);
}
if (coordinate.isMeasured() && other.isMeasured()) {
return new Coordinate(
x,
y,
min(coordinate.getZValue(), other.getZValue()),
min(coordinate.getMeasuredValue(), other.getMeasuredValue()));
}
return new Coordinate(x, y, min(coordinate.getZValue(), other.getZValue()), false);
}
public static ICoordinate getMaximum(final ICoordinate coordinate, final ICoordinate other) {
if (coordinate == null) {
return other;
}
if (other == null) {
return coordinate;
}
final double x = max(coordinate.getXValue(), other.getXValue());
final double y = max(coordinate.getYValue(), other.getYValue());
if (min(coordinate.getDimension(), other.getDimension()) == 2) {
if (coordinate.isMeasured() && other.isMeasured()) {
return new Coordinate(x, y, max(coordinate.getMeasuredValue(), other.getMeasuredValue()), true);
}
return new Coordinate(x, y);
}
if (coordinate.isMeasured() && other.isMeasured()) {
return new Coordinate(
x,
y,
max(coordinate.getZValue(), other.getZValue()),
max(coordinate.getMeasuredValue(), other.getMeasuredValue()));
}
return new Coordinate(x, y, max(coordinate.getZValue(), other.getZValue()), false);
}
public static ICoordinate createAdapted(
final ICoordinate coordinate,
final int coordinateValueIndex,
final double value) {
final double[] values = coordinate.getValues();
values[coordinateValueIndex] = value;
return new Coordinate(values, coordinate.isMeasured());
}
public static ICoordinate getMaximum(final ICoordinate... coordinates) {
ICoordinate result = null;
for (final ICoordinate coordinate : coordinates) {
if (result == null) {
result = coordinate;
continue;
}
result = CoordinateUtilities.getMaximum(result, coordinate);
}
return result;
}
public static ICoordinate getMinimum(final ICoordinate... coordinates) {
ICoordinate result = null;
for (final ICoordinate coordinate : coordinates) {
if (result == null) {
result = coordinate;
continue;
}
result = CoordinateUtilities.getMinimum(result, coordinate);
}
return result;
}
}
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