X-Git-Url: http://gitweb.fperrin.net/?p=GpsPrune.git;a=blobdiff_plain;f=src%2Ftim%2Fprune%2Ffunction%2Fcompress%2FXYpoint.java;fp=src%2Ftim%2Fprune%2Ffunction%2Fcompress%2FXYpoint.java;h=b3d93d1e1b2cc3e55028db777ac2a872014e60f8;hp=0000000000000000000000000000000000000000;hb=ce6f2161b8596f7018d6a76bff79bc9e571f35fd;hpb=2d8cb72e84d5cc1089ce77baf1e34ea3ea2f8465

diff --git a/src/tim/prune/function/compress/XYpoint.java b/src/tim/prune/function/compress/XYpoint.java
new file mode 100644
index 0000000..b3d93d1
--- /dev/null
+++ b/src/tim/prune/function/compress/XYpoint.java
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+package tim.prune.function.compress;
+
+/**
+ * Basic class to hold x and y coordinates
+ * for a point or a vector
+ */
+public class XYpoint
+{
+	// x and y coordinates
+	public double x = 0.0, y = 0.0;
+
+	/**
+	 * Empty constructor
+	 */
+	public XYpoint() {
+		this(0.0, 0.0);
+	}
+
+	/**
+	 * Constructor
+	 * @param inX x value
+	 * @param inY y value
+	 */
+	public XYpoint(double inX, double inY) {
+		x = inX; y = inY;
+	}
+
+	/**
+	 * @param inOther other vector
+	 * @return scalar dot product
+	 */
+	public double dot(XYpoint inOther) {
+		return (x * inOther.x + y * inOther.y);
+	}
+
+	/** @return length of vector */
+	public double len() {return Math.sqrt(len2());}
+
+	/** @return squared length of vector */
+	public double len2() {return (x*x + y*y);}
+
+	/**
+	 * @param inOther other point object
+	 * @return vector from this one to the other one
+	 */
+	public XYpoint vectorTo(XYpoint inOther) {
+		return new XYpoint(inOther.x - x, inOther.y - y);
+	}
+}