2 Copyright (C) 1997,1998,1999
3 Kenji Hiranabe, Eiwa System Management, Inc.
5 This program is free software.
6 Implemented by Kenji Hiranabe(hiranabe@esm.co.jp),
7 conforming to the Java(TM) 3D API specification by Sun Microsystems.
9 Permission to use, copy, modify, distribute and sell this software
10 and its documentation for any purpose is hereby granted without fee,
11 provided that the above copyright notice appear in all copies and
12 that both that copyright notice and this permission notice appear
13 in supporting documentation. Kenji Hiranabe and Eiwa System Management,Inc.
14 makes no representations about the suitability of this software for any
15 purpose. It is provided "AS IS" with NO WARRANTY.
19 import java.io.Serializable;
21 import javajs.api.JSONEncodable;
24 * A generic 3 element tuple that is represented by single precision floating
25 * point x,y and z coordinates.
27 * @version specification 1.1, implementation $Revision: 1.10 $, $Date:
28 * 2006/09/08 20:20:20 $
29 * @author Kenji hiranabe
31 * additions by Bob Hanson hansonr@stolaf.edu 9/30/2012
32 * for unique constructor and method names
33 * for the optimization of compiled JavaScript using Java2Script
35 public abstract class T3 implements JSONEncodable, Serializable {
47 * Sets the value of this tuple to the specified xyz coordinates.
56 public final void set(float x, float y, float z) {
63 * Sets the value of this tuple from the 3 values specified in the array.
66 * the array of length 3 containing xyz in order
68 public final void setA(float t[]) {
69 // ArrayIndexOutOfBounds is thrown if t.length < 3
76 * Sets the value of this tuple to the value of the Tuple3f argument.
79 * the tuple to be copied
81 public final void setT(T3 t1) {
88 * Sets the value of this tuple to the vector sum of tuples t1 and t2.
95 public final void add2(T3 t1, T3 t2) {
102 * Sets the value of this tuple to the vector sum of itself and tuple t1.
107 public final void add(T3 t1) {
114 * Computes the square of the distance between this point and point p1.
118 * @return the square of distance between these two points as a float
120 public final float distanceSquared(T3 p1) {
121 double dx = x - p1.x;
122 double dy = y - p1.y;
123 double dz = z - p1.z;
124 return (float) (dx * dx + dy * dy + dz * dz);
128 * Returns the distance between this point and point p1.
132 * @return the distance between these two points
134 public final float distance(T3 p1) {
135 return (float) Math.sqrt(distanceSquared(p1));
139 * Sets the value of this tuple to the vector difference of tuple t1 and t2
147 public final void sub2(T3 t1, T3 t2) {
154 * Sets the value of this tuple to the vector difference of itself and tuple
155 * t1 (this = this - t1).
160 public final void sub(T3 t1) {
167 * Sets the value of this tuple to the scalar multiplication of itself.
172 public final void scale(float s) {
185 public final void add3(float a, float b, float c) {
193 * {x*p.x, y*p.y, z*p.z) used for three-way scaling
197 public final void scaleT(T3 p) {
205 * Sets the value of this tuple to the scalar multiplication of tuple t1 and
206 * then adds tuple t2 (this = s*t1 + t2).
211 * the tuple to be multipled
213 * the tuple to be added
215 public final void scaleAdd2(float s, T3 t1, T3 t2) {
223 * average of two tuples
228 public void ave(T3 a, T3 b) {
229 x = (a.x + b.x) / 2f;
230 y = (a.y + b.y) / 2f;
231 z = (a.z + b.z) / 2f;
235 * Vector dot product. Was in Vector3f; more useful here, though.
241 public final float dot(T3 v) {
242 return x * v.x + y * v.y + z * v.z;
246 * Returns the squared length of this vector.
247 * Was in Vector3f; more useful here, though.
249 * @return the squared length of this vector
251 public final float lengthSquared() {
252 return x * x + y * y + z * z;
256 * Returns the length of this vector.
257 * Was in Vector3f; more useful here, though.
259 * @return the length of this vector
261 public final float length() {
262 return (float) Math.sqrt(lengthSquared());
266 * Normalizes this vector in place.
267 * Was in Vector3f; more useful here, though.
269 public final void normalize() {
272 // zero-div may occur.
279 * Sets this tuple to be the vector cross product of vectors v1 and v2.
286 public final void cross(T3 v1, T3 v2) {
287 set(v1.y * v2.z - v1.z * v2.y, v1.z * v2.x - v1.x * v2.z, v1.x * v2.y
292 * Returns a hash number based on the data values in this object. Two
293 * different Tuple3f objects with identical data values (ie, returns true for
294 * equals(Tuple3f) ) will return the same hash number. Two vectors with
295 * different data members may return the same hash value, although this is not
299 public int hashCode() {
301 bits = 31L * bits + floatToIntBits0(x);
302 bits = 31L * bits + floatToIntBits0(y);
303 bits = 31L * bits + floatToIntBits0(z);
304 return (int) (bits ^ (bits >> 32));
307 public static int floatToIntBits0(float f) {
308 return (f == 0 ? 0 : Float.floatToIntBits(f));
312 * Returns true if all of the data members of Tuple3f t1 are equal to the
313 * corresponding data members in this
316 * the vector with which the comparison is made.
319 public boolean equals(Object t1) {
320 if (!(t1 instanceof T3))
323 return (x == t2.x && y == t2.y && z == t2.z);
327 * Returns a string that contains the values of this Tuple3f. The form is
330 * @return the String representation
333 public String toString() {
334 return "{" + x + ", " + y + ", " + z + "}";
338 public String toJSON() {
339 return "[" + x + "," + y + "," + z + "]";