/**
* After a call to {@code transform}, applies the <em>inverse</em> transform on {@code dstPts} and
* compares the result with {@code srcPts}. The maximal difference (in absolute value) is
* returned. This method is used for assertions.
*/
private float maxError(
final float[] srcPts1,
final double[] srcPts2,
int srcOff,
final float[] dstPts1,
final double[] dstPts2,
int dstOff,
int numPts) {
float max = 0f;
if (inverse == null) {
inverse();
if (inverse == null) {
return max; // Custom user's subclass; can't do the test.
}
}
final int sourceDim = getSourceDimensions();
final float[] tmp = new float[numPts * sourceDim];
inverse.transform(dstPts1, dstPts2, dstOff, tmp, null, 0, numPts);
for (int i = 0; i < tmp.length; i++, srcOff++) {
final float expected = (srcPts2 != null) ? (float) srcPts2[srcOff] : srcPts1[srcOff];
float error = abs(tmp[i] - expected);
switch (i % sourceDim) {
case 0:
error -= 360 * floor(error / 360);
break; // Rool Longitude
case 2:
continue; // Ignore height because inacurate.
}
if (error > max) {
max = error;
}
}
return max;
}
/** Creates the inverse transform of this object. */
@Override
public MathTransform inverse() {
if (inverse == null) {
inverse =
new MolodenskiTransform(
abridged, a + da, b + db, target3D, a, b, source3D, -dx, -dy, -dz);
inverse.inverse = this;
}
return inverse;
}