public void testGetCoordinatesBetween() {
try {
// what if the null value is passed
CoordinateSequence[] cs = nullLine.getCoordinatesBetween(0.0, 5.0);
assertTrue("cs.length = " + cs.length + ". Should be 1", cs.length == 1);
assertEquals(cs[0].size(), 0);
arbitraryLine.measureOnLength(false);
// what if from/to is outside of the range of values
double maxM = arbitraryLine.getMaxM();
cs = arbitraryLine.getCoordinatesBetween(maxM + 1.0, maxM + 10.0);
// check for several ascending M-values
int minIdx = (int) (Math.random() * (arbitraryLine.getNumPoints() - 1));
int maxIdx = Math.min((arbitraryLine.getNumPoints() - 1), minIdx + 10);
double minM = ((MCoordinate) arbitraryLine.getCoordinateN(minIdx)).m;
maxM = ((MCoordinate) arbitraryLine.getCoordinateN(maxIdx)).m;
cs = arbitraryLine.getCoordinatesBetween(minM, maxM);
assertNotNull(cs);
assertTrue(cs.length > 0);
Coordinate[] coar = cs[0].toCoordinateArray();
int j = 0;
for (int i = minIdx; i <= maxIdx; i++) {
assertEquals((MCoordinate) arbitraryLine.getCoordinateN(i), coar[j]);
j++;
}
minM = Math.max(0.0, minM - Math.random() * 10);
cs = arbitraryLine.getCoordinatesBetween(minM, maxM);
coar = cs[0].toCoordinateArray();
MCoordinate mctest = (MCoordinate) coar[0];
MCoordinate mcexp = (MCoordinate) arbitraryLine.getCoordinateAtM(minM);
assertEquals(mcexp, mctest);
assertEquals(mctest.m, minM, DoubleComparator.defaultNumericalPrecision());
maxM = Math.min(arbitraryLine.getLength(), maxM + Math.random() * 10);
cs = arbitraryLine.getCoordinatesBetween(minM, maxM);
coar = cs[0].toCoordinateArray();
mctest = (MCoordinate) coar[coar.length - 1];
mcexp = (MCoordinate) arbitraryLine.getCoordinateAtM(maxM);
assertEquals(mcexp.x, mctest.x, Math.ulp(mcexp.x) * 100);
assertEquals(mcexp.y, mctest.y, Math.ulp(mcexp.y) * 100);
assertEquals(mctest.m, maxM, DoubleComparator.defaultNumericalPrecision());
} catch (Exception e) {
e.printStackTrace();
assertTrue(false); // should never reach here
}
}
public void testGetCoordinateAtM() {
// what if null string
try {
Coordinate mc = nullLine.getCoordinateAtM(2);
assertNull(mc);
// get two neighbouring points along the arbitraryline
arbitraryLine.measureOnLength(false);
int elem1Indx = (int) (Math.random() * (arbitraryLine.getNumPoints() - 1));
int elem2Indx = 0;
if (elem1Indx == arbitraryLine.getNumPoints() - 1) {
elem2Indx = elem1Indx - 1;
} else {
elem2Indx = elem1Indx + 1;
}
// if m is value of a coordinate, the returned coordinate should
// equal that coordinate
MCoordinate mco1 = (MCoordinate) arbitraryLine.getCoordinateN(elem1Indx);
MCoordinate mcotest = (MCoordinate) arbitraryLine.getCoordinateAtM(mco1.m);
assertNotSame(mco1, mcotest);
assertEquals(mco1.x, mcotest.x, Math.ulp(100 * mco1.x));
assertEquals(mco1.y, mcotest.y, Math.ulp(100 * mco1.y));
assertEquals(mco1.m, mcotest.m, Math.ulp(100 * mco1.m));
MCoordinate mco2 = (MCoordinate) arbitraryLine.getCoordinateN(elem2Indx);
double offset = Math.random();
double newM = mco1.m + offset * (mco2.m - mco1.m);
MCoordinate mcexp =
new MCoordinate(
mco1.x + offset * (mco2.x - mco1.x),
mco1.y + offset * (mco2.y - mco1.y),
Double.NaN,
mco1.m + offset * (mco2.m - mco1.m));
MCoordinate mctest = (MCoordinate) arbitraryLine.getCoordinateAtM(newM);
assertEquals(mcexp.x, mctest.x, 0.0001);
assertEquals(mcexp.y, mctest.y, 0.0001);
assertEquals(mcexp.m, mctest.m, 0.0001);
} catch (Exception e) {
System.err.println(e);
}
}
