public void testGetMatCoordinate() {
try {
// what in case of the null string
assertTrue(Double.isNaN(nullLine.getMatCoordinate(new Coordinate(1.0, 1.0), 1.0)));
// 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 a coordinate of the geometry is passed, it should return
// exactly that m-value
MCoordinate mco1 = (MCoordinate) arbitraryLine.getCoordinateN(elem1Indx);
double m = arbitraryLine.getMatCoordinate(mco1, 0.00001);
assertEquals(mco1.m, m, DoubleComparator.defaultNumericalPrecision());
// check for a coordinate between mco1 and mco2 (neighbouring
// coordinates)
MCoordinate mco2 = (MCoordinate) arbitraryLine.getCoordinateN(elem2Indx);
double offset = Math.random();
double expectedM = mco1.m + offset * (mco2.m - mco1.m);
Coordinate mctest =
new Coordinate(mco1.x + offset * (mco2.x - mco1.x), mco1.y + offset * (mco2.y - mco1.y));
double testM = arbitraryLine.getMatCoordinate(mctest, offset);
assertEquals(expectedM, testM, DoubleComparator.defaultNumericalPrecision());
} catch (Exception e) {
e.printStackTrace();
assertTrue(false); // should never reach here
}
}
