From 5fdb8554aa59432924c6cf2cf4e8c178c5856deb Mon Sep 17 00:00:00 2001
From: student <student@localhost>
Date: Wed, 11 Apr 2018 17:06:20 -0400
Subject: Update

---
 CSMath/src/bezier/geom/TDHPoint.java | 85 ++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 CSMath/src/bezier/geom/TDHPoint.java

(limited to 'CSMath/src/bezier/geom/TDHPoint.java')

diff --git a/CSMath/src/bezier/geom/TDHPoint.java b/CSMath/src/bezier/geom/TDHPoint.java
new file mode 100644
index 0000000..40553a9
--- /dev/null
+++ b/CSMath/src/bezier/geom/TDHPoint.java
@@ -0,0 +1,85 @@
+package bezier.geom;
+
+/**
+ * A two-dimensional homogeneous point.
+ * 
+ * @author bjculkin
+ *
+ */
+public class TDHPoint extends TDPoint {
+	/**
+	 * The homogeneous coordinate for the point.
+	 */
+	public final double z;
+
+	/**
+	 * Create a new two-dimensional homogeneous point.
+	 * 
+	 * @param x
+	 *            The x coordinate.
+	 * @param y
+	 *            The y coordinate.
+	 * @param z
+	 *            The homogeneous coordinate.
+	 */
+	public TDHPoint(double x, double y, double z) {
+		super(x, y);
+
+		this.z = z;
+	}
+
+	/**
+	 * Create a new two-dimensional homogeneous point.
+	 * 
+	 * The homogeneous coordinate is set to 1.
+	 * 
+	 * @param x
+	 *            The x coordinate.
+	 * @param y
+	 *            The y coordinate.
+	 */
+	public TDHPoint(double x, double y) {
+		this(x, y, 1);
+	}
+
+	/**
+	 * Convert this point to a plain two-dimensional point.
+	 * 
+	 * @return A two-dimensional version of this point.
+	 */
+	public TDPoint toTDPoint() {
+		/*
+		 * Convert back down by dividing each coordinate by the homogeneous value.
+		 */
+		return new TDPoint(x / z, y / z);
+	}
+
+	@Override
+	public int hashCode() {
+		final int prime = 31;
+		int result = super.hashCode();
+		long temp;
+		temp = Double.doubleToLongBits(z);
+		result = prime * result + (int) (temp ^ (temp >>> 32));
+		return result;
+	}
+
+	@Override
+	public boolean equals(Object obj) {
+		if (this == obj)
+			return true;
+		if (!super.equals(obj))
+			return false;
+		if (getClass() != obj.getClass())
+			return false;
+		TDHPoint other = (TDHPoint) obj;
+		if (Double.doubleToLongBits(z) != Double.doubleToLongBits(other.z))
+			return false;
+		return true;
+	}
+
+	@Override
+	public String toString() {
+		return "TDHPoint [z=" + z + ", x=" + x + ", y=" + y + "]";
+	}
+}
\ No newline at end of file
-- 
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