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package tim.prune.function.compress.methods;
import tim.prune.data.NumberUtils;
import tim.prune.function.compress.CompressionMethodType;
import tim.prune.function.compress.TrackDetails;
/** Compression of nearby points using a span factor parameter */
public class NearbyFactorMethod extends NearbyPointsMethod
{
private final int _factor;
public NearbyFactorMethod(int factor) {
_factor = factor;
}
public NearbyFactorMethod(String inString) {
_factor = NumberUtils.getIntOrZero(recogniseString(inString) ? inString.substring(4) : inString);
}
public CompressionMethodType getType() {
return CompressionMethodType.NEARBY_WITH_FACTOR;
}
public String getParam() {
return "" + Math.abs(_factor);
}
public String getSettingsString() {
return getType().getKey() + _factor;
}
static boolean recogniseString(String inString) {
return recogniseString(inString, CompressionMethodType.NEARBY_WITH_FACTOR);
}
/** @return the radian threshold based on the track's extents */
protected double getRadianThreshold(TrackDetails inDetails)
{
// Parse parameter
double param = _factor <= 0 ? 1.0 : (1.0 / _factor);
if (param <= 0.0 || param >= 1.0) {
// Parameter isn't valid, don't delete any
return 0.0;
}
return inDetails.getMaxRadians() * param;
}
}
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