AE2 First Commit, the dawn of 1.7 hast arrived.

2013-12-27 16:59:59 -06:00
commit e9acdcbee2
468 changed files with 47440 additions and 0 deletions
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+package appeng.util.math;
+
+import org.lwjgl.util.vector.Quaternion;
+import org.lwjgl.util.vector.Vector3f;
+
+public class Helper
+{
+
+	public static final Helper instance = new Helper();
+
+	public Quaternion getRotation(Vector3f vForward, Vector3f vUp)
+	{
+		Vector3f vRight = new Vector3f();
+		Vector3f.cross( vUp, vForward, vRight );
+
+		/*
+		 * vRight.x vRight.y, vRight.z, vUp.x, vUp.y, vUp.z, vForward.x,
+		 * vForward.y, vForward.z
+		 */
+
+		Quaternion qrot = new Quaternion();
+		qrot.w = (float) Math.sqrt( 1.0f + vRight.x + vUp.y + vForward.z ) / 2.0f;
+		double dfWScale = qrot.w * 4.0;
+		qrot.x = (float) ((vForward.y - vUp.z) / dfWScale);
+		qrot.y = (float) ((vRight.z - vForward.x) / dfWScale);
+		qrot.z = (float) ((vUp.x - vRight.y) / dfWScale);
+
+		return qrot;
+	}
+}