X-Git-Url: http://gitweb.fperrin.net/?p=GpsPrune.git;a=blobdiff_plain;f=src%2Ftim%2Fprune%2Fdata%2FDoubleRange.java;fp=src%2Ftim%2Fprune%2Fdata%2FDoubleRange.java;h=3f252eed6cd2bcfe00bcdc272c2f1f82404dcbba;hp=0000000000000000000000000000000000000000;hb=ce6f2161b8596f7018d6a76bff79bc9e571f35fd;hpb=2d8cb72e84d5cc1089ce77baf1e34ea3ea2f8465

diff --git a/src/tim/prune/data/DoubleRange.java b/src/tim/prune/data/DoubleRange.java
new file mode 100644
index 0000000..3f252ee
--- /dev/null
+++ b/src/tim/prune/data/DoubleRange.java
@@ -0,0 +1,112 @@
+package tim.prune.data;
+
+/**
+ * Represents a range of doubles, holding the maximum and
+ * minimum values.  Values can be positive or negative
+ */
+public class DoubleRange
+{
+	private boolean _empty = true;
+	private double _min = 0.0, _max = 0.0;
+
+
+	/** Empty constructor, cleared to zeroes */
+	public DoubleRange() {}
+
+	/**
+	 * Constructor giving two initial values
+	 * @param inValue1 first value
+	 * @param inValue2 second value
+	 */
+	public DoubleRange(double inValue1, double inValue2)
+	{
+		addValue(inValue1);
+		addValue(inValue2);
+	}
+
+	/**
+	 * Clear for a new calculation
+	 */
+	public void clear()
+	{
+		_min = _max = 0.0;
+		_empty = true;
+	}
+
+
+	/**
+	 * Add a value to the range
+	 * @param inValue value to add
+	 */
+	public void addValue(double inValue)
+	{
+		if (inValue < _min || _empty) _min = inValue;
+		if (inValue > _max || _empty) _max = inValue;
+		_empty = false;
+	}
+
+	/**
+	 * Combine this range with another one
+	 * @param inOtherRange other range to add to this one
+	 */
+	public void combine(DoubleRange inOtherRange)
+	{
+		if (inOtherRange != null && inOtherRange.getRange() > 1.0)
+		{
+			addValue(inOtherRange.getMinimum());
+			addValue(inOtherRange.getMaximum());
+		}
+	}
+
+	/**
+	 * @return true if data values were found
+	 */
+	public boolean hasData()
+	{
+		return (!_empty);
+	}
+
+
+	/**
+	 * @return minimum value, or 0.0 if none found
+	 */
+	public double getMinimum()
+	{
+		return _min;
+	}
+
+
+	/**
+	 * @return maximum value, or 0.0 if none found
+	 */
+	public double getMaximum()
+	{
+		return _max;
+	}
+
+	/**
+	 * @return range, as maximum - minimum
+	 */
+	public double getRange()
+	{
+		return _max - _min;
+	}
+
+	/**
+	 * @return mid value, halfway between min and max
+	 */
+	public double getMidValue()
+	{
+		return (_max + _min) / 2.0;
+	}
+
+	/**
+	 * Copy this range into a new object, which can then be modified without changing this one
+	 * @return deep copy of this object
+	 */
+	public DoubleRange copy()
+	{
+		if (_empty) return new DoubleRange();
+		return new DoubleRange(_min, _max);
+	}
+}