iter.startPixels();
final double[] row=samples[j++];
int i=0; do {
row[i++] = iter.getSampleDouble(band);
}
while (!iter.nextPixelDone());
assert i == row.length;
}
while (!iter.nextLineDone());
assert j == samples.length;
float dx = (float)(x-x0); if (dx==1) dx=ONE_EPSILON;