From 48f781fb6e61539ba9d17efcfd9f9e38245cf6c0 Mon Sep 17 00:00:00 2001
From: bculkin2442 <bjculkin@mix.wvu.edu>
Date: Wed, 23 May 2018 16:42:38 -0400
Subject: Refactor package structure

---
 CSMath/src/bezier/geom/transform/TDHRotation.java | 57 +++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 CSMath/src/bezier/geom/transform/TDHRotation.java

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

diff --git a/CSMath/src/bezier/geom/transform/TDHRotation.java b/CSMath/src/bezier/geom/transform/TDHRotation.java
new file mode 100644
index 0000000..a8c4cd6
--- /dev/null
+++ b/CSMath/src/bezier/geom/transform/TDHRotation.java
@@ -0,0 +1,57 @@
+package bezier.geom.transform;
+
+import bezier.geom.TDHPoint;
+
+public class TDHRotation implements TDHTransform {
+	public final double theta;
+
+	public TDHRotation(double theta) {
+		this.theta = theta;
+	}
+
+	@Override
+	public TDHPoint transform(TDHPoint punkt) {
+		double x = (punkt.x * Math.cos(theta)) - (punkt.y * Math.sin(theta));
+		double y = (punkt.x * Math.sin(theta)) - (punkt.y * Math.cos(theta));
+
+		return new TDHPoint(x, y, punkt.z);
+	}
+
+	public double[][] matrix() {
+		return new double[][] { new double[] { Math.cos(theta), Math.sin(theta), 0 },
+				new double[] { -Math.sin(theta), Math.cos(theta), 0 }, new double[] { 0, 0, 1 } };
+	}
+
+	public TDHTransform invert() {
+		return new TDHRotation(-theta);
+	}
+
+	@Override
+	public int hashCode() {
+		final int prime = 31;
+		int result = 1;
+		long temp;
+		temp = Double.doubleToLongBits(theta);
+		result = prime * result + (int) (temp ^ (temp >>> 32));
+		return result;
+	}
+
+	@Override
+	public boolean equals(Object obj) {
+		if (this == obj)
+			return true;
+		if (obj == null)
+			return false;
+		if (getClass() != obj.getClass())
+			return false;
+		TDHRotation other = (TDHRotation) obj;
+		if (Double.doubleToLongBits(theta) != Double.doubleToLongBits(other.theta))
+			return false;
+		return true;
+	}
+
+	@Override
+	public String toString() {
+		return "TDHRotation [theta=" + theta + "]";
+	}
+}
\ No newline at end of file
-- 
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