--- /dev/null
+/*
+ Copyright (C) 1997,1998,1999
+ Kenji Hiranabe, Eiwa System Management, Inc.
+
+ This program is free software.
+ Implemented by Kenji Hiranabe(hiranabe@esm.co.jp),
+ conforming to the Java(TM) 3D API specification by Sun Microsystems.
+
+ Permission to use, copy, modify, distribute and sell this software
+ and its documentation for any purpose is hereby granted without fee,
+ provided that the above copyright notice appear in all copies and
+ that both that copyright notice and this permission notice appear
+ in supporting documentation. Kenji Hiranabe and Eiwa System Management,Inc.
+ makes no representations about the suitability of this software for any
+ purpose. It is provided "AS IS" with NO WARRANTY.
+*/
+package javajs.util;
+
+import java.io.Serializable;
+
+import javajs.api.JSONEncodable;
+import javajs.util.T3;
+
+
+
+/**
+ * A 4 element axis angle represented by single precision floating point
+ * x,y,z,angle components. An axis angle is a rotation of angle (radians) about
+ * the vector (x,y,z).
+ *
+ * @version specification 1.1, implementation $Revision: 1.9 $, $Date:
+ * 2006/07/28 17:01:32 $
+ * @author Kenji hiranabe
+ *
+ * additions by Bob Hanson hansonr@stolaf.edu 9/30/2012
+ * for unique constructor and method names
+ * for the optimization of compiled JavaScript using Java2Script
+ */
+public class A4 implements JSONEncodable, Serializable {
+
+ /*
+ * I assumed that the length of the axis vector is not significant.
+ */
+
+ /**
+ * The x coordinate.
+ */
+ public float x;
+
+ /**
+ * The y coordinate.
+ */
+ public float y;
+
+ /**
+ * The z coordinate.
+ */
+ public float z;
+
+ /**
+ * The angle.
+ */
+ public float angle;
+
+ /**
+ * Constructs and initializes a AxisAngle4f to (0,0,1,0).
+ */
+ public A4() {
+ z = 1.0f;
+ }
+
+ /**
+ * Constructs and initializes an AxisAngle4f from the specified x, y, z, and
+ * angle.
+ *
+ * @param x
+ * the x coordinate
+ * @param y
+ * the y coordinate
+ * @param z
+ * the z coordinate
+ * @param angle
+ * the angle.
+ * @return a
+ */
+ public static A4 new4(float x, float y, float z, float angle) {
+ A4 a = new A4();
+ a.set4(x, y, z, angle);
+ return a;
+ }
+
+ /**
+ * Constructs and initializes a AxisAngle4f from the specified AxisAngle4f.
+ *
+ * @param a1
+ * the AxisAngle4f containing the initialization x y z angle data
+ * @return a
+ */
+ public static A4 newAA(A4 a1) {
+ A4 a = new A4();
+ a.set4(a1.x, a1.y, a1.z, a1.angle);
+ return a;
+ }
+
+ /**
+ * Constructs and initializes an AxisAngle4f from the specified axis and
+ * angle.
+ *
+ * @param axis
+ * the axis
+ * @param angle
+ * the angle
+ * @return a
+ */
+ public static A4 newVA(V3 axis, float angle) {
+ A4 a = new A4();
+ a.setVA(axis, angle);
+ return a;
+ }
+
+ /**
+ * Sets the value of this AxisAngle4f to the specified axis and angle.
+ *
+ * @param axis
+ * the axis
+ * @param angle
+ * the angle
+ * @since Java 3D 1.2
+ */
+ public final void setVA(V3 axis, float angle) {
+ x = axis.x;
+ y = axis.y;
+ z = axis.z;
+ this.angle = angle;
+ }
+
+ /**
+ * Sets the value of this axis angle to the specified x,y,z,angle.
+ *
+ * @param x
+ * the x coordinate
+ * @param y
+ * the y coordinate
+ * @param z
+ * the z coordinate
+ * @param angle
+ * the angle
+ */
+ public final void set4(float x, float y, float z, float angle) {
+ this.x = x;
+ this.y = y;
+ this.z = z;
+ this.angle = angle;
+ }
+
+ /**
+ * Sets the value of this axis angle to the value of axis angle t1.
+ *
+ * @param a
+ * the axis angle to be copied
+ */
+ public final void setAA(A4 a) {
+ x = a.x;
+ y = a.y;
+ z = a.z;
+ angle = a.angle;
+ }
+
+
+ /**
+ * Sets the value of this axis-angle to the rotational component of the passed
+ * matrix.
+ *
+ * @param m1
+ * the matrix3f
+ */
+ public final void setM(M3 m1) {
+ setFromMat(m1.m00, m1.m01, m1.m02, m1.m10, m1.m11, m1.m12, m1.m20, m1.m21,
+ m1.m22);
+ }
+
+ // helper method
+ private void setFromMat(double m00, double m01, double m02, double m10,
+ double m11, double m12, double m20, double m21,
+ double m22) {
+ // assuming M is normalized.
+
+ double cos = (m00 + m11 + m22 - 1.0) * 0.5;
+ x = (float) (m21 - m12);
+ y = (float) (m02 - m20);
+ z = (float) (m10 - m01);
+ double sin = 0.5 * Math.sqrt(x * x + y * y + z * z);
+ if (sin == 0 && cos == 1) {
+ x = y = 0;
+ z = 1;
+ angle = 0;
+ } else {
+ angle = (float) Math.atan2(sin, cos);
+ }
+
+ // no need to normalize
+ // x /= n;
+ // y /= n;
+ // z /= n;
+ }
+
+ /**
+ * Returns a hash number based on the data values in this object. Two
+ * different AxisAngle4f objects with identical data values (ie, returns true
+ * for equals(AxisAngle4f) ) will return the same hash number. Two vectors
+ * with different data members may return the same hash value, although this
+ * is not likely.
+ */
+ @Override
+ public int hashCode() {
+ return T3.floatToIntBits(x) ^ T3.floatToIntBits(y)
+ ^ T3.floatToIntBits(z) ^ T3.floatToIntBits(angle);
+ }
+
+ /**
+ * Returns true if the Object o is of type AxisAngle4f and all of the data
+ * members of o1 are equal to the corresponding data members in this
+ * AxisAngle4f.
+ *
+ * @param o
+ * the object with which the comparison is made.
+ * @return T/F
+ */
+ @Override
+ public boolean equals(Object o) {
+ if (!(o instanceof A4))
+ return false;
+ A4 a1 = (A4) o;
+ return x == a1.x && y == a1.y && z == a1.z && angle == a1.angle;
+ }
+
+ /**
+ * Returns a string that contains the values of this AxisAngle4f. The form is
+ * (x,y,z,angle).
+ *
+ * @return the String representation
+ */
+ @Override
+ public String toString() {
+ return "(" + x + ", " + y + ", " + z + ", " + angle + ")";
+ }
+
+ @Override
+ public String toJSON() {
+ return "[" + x + "," + y + "," + z + "," + (float) (angle * 180.0 / Math.PI) + "]";
+ }
+}