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