1 /*
2 * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package javafx.animation;
27
28 import com.sun.javafx.animation.TickCalculation;
29 import com.sun.scenario.animation.shared.InterpolationInterval;
30 import javafx.beans.property.Property;
31 import javafx.beans.property.SimpleLongProperty;
32 import javafx.util.Duration;
33 import static org.junit.Assert.assertEquals;
34
35 import org.junit.Test;
36
37 public class InterpolatorTest {
38
39 private static final double EPSILON = 1e-12;
40 private static final float EPSILON_FLOAT = 1e-6f;
41 private static final DummyInterpolatable START = new DummyInterpolatable(0);
42 private static final DummyInterpolatable END = new DummyInterpolatable(10);
43
44 @Test
45 public void testInterpolateWithObjects() {
46 final DummyInterpolatable i1 = new DummyInterpolatable(1);
47 final DummyInterpolatable i2 = new DummyInterpolatable(4);
48 final Object o = new Object();
49
50 assertEquals(Double.valueOf(2.5), (Double)Interpolator.LINEAR.interpolate(Double.valueOf(1), Integer.valueOf(4), 0.5), EPSILON);
51 assertEquals(Double.valueOf(2.5), (Double)Interpolator.LINEAR.interpolate(Integer.valueOf(4), Double.valueOf(1), 0.5), EPSILON);
52 assertEquals(Float.valueOf(2.5f), (Float)Interpolator.LINEAR.interpolate(Float.valueOf(1), Integer.valueOf(4), 0.5), EPSILON_FLOAT);
53 assertEquals(Float.valueOf(2.5f), (Float)Interpolator.LINEAR.interpolate(Integer.valueOf(4), Float.valueOf(1), 0.5), EPSILON_FLOAT);
54 assertEquals(Long.valueOf(3L), Interpolator.LINEAR.interpolate(Long.valueOf(1), Integer.valueOf(4), 0.5));
55 assertEquals(Long.valueOf(3L), Interpolator.LINEAR.interpolate(Integer.valueOf(4), Long.valueOf(1), 0.5));
56 assertEquals(Integer.valueOf(3), Interpolator.LINEAR.interpolate(Integer.valueOf(1), Integer.valueOf(4), 0.5));
57 assertEquals(2.5, ((DummyInterpolatable)Interpolator.LINEAR.interpolate(i1, i2, 0.5)).value, EPSILON);
58
59 assertEquals(o, Interpolator.LINEAR.interpolate(o, Integer.MIN_VALUE, 1.0-2*EPSILON));
60 assertEquals(Integer.MIN_VALUE, Interpolator.LINEAR.interpolate(o, Integer.MIN_VALUE, 1.0));
61
62 assertEquals(Integer.MIN_VALUE, Interpolator.LINEAR.interpolate(Integer.MIN_VALUE, o, 1.0-2*EPSILON));
63 assertEquals(o, Interpolator.LINEAR.interpolate(Integer.MIN_VALUE, o, 1.0));
64
65 assertEquals(i1, Interpolator.LINEAR.interpolate(i1, o, 1.0-2*EPSILON));
66 assertEquals(o, Interpolator.LINEAR.interpolate(i1, o, 1.0));
67 }
68
69 @Test
70 public void testDISCRETE() {
71 assertEquals(false, Interpolator.DISCRETE.interpolate(false, true, 1.0-2*EPSILON));
72 assertEquals(true, Interpolator.DISCRETE.interpolate(false, true, 1.0));
73
74 assertEquals(1.0, Interpolator.DISCRETE.interpolate(1.0, 2.0, 1.0-2*EPSILON), EPSILON);
75 assertEquals(2.0, Interpolator.DISCRETE.interpolate(1.0, 2.0, 1.0), EPSILON);
76
77 assertEquals(-3, Interpolator.DISCRETE.interpolate(-3, 7, 1.0-2*EPSILON));
78 assertEquals( 7, Interpolator.DISCRETE.interpolate(-3, 7, 1.0));
79
80 assertEquals( 12L, Interpolator.DISCRETE.interpolate(12L, -201L, 1.0-2*EPSILON));
81 assertEquals(-201L, Interpolator.DISCRETE.interpolate(12L, -201L, 1.0));
82
83 assertEquals( 0, ((DummyInterpolatable)Interpolator.DISCRETE.interpolate(START, END, 1.0-2*EPSILON)).value, EPSILON);
84 assertEquals(10, ((DummyInterpolatable)Interpolator.DISCRETE.interpolate(START, END, 1.0)).value, EPSILON);
85 }
86
87 @Test
88 public void testLINEAR() {
89 assertEquals(false, Interpolator.LINEAR.interpolate(false, true, 0.0));
90 assertEquals(false, Interpolator.LINEAR.interpolate(false, true, 0.1));
91 assertEquals(false, Interpolator.LINEAR.interpolate(false, true, 0.5));
92 assertEquals(false, Interpolator.LINEAR.interpolate(false, true, 0.9));
93 assertEquals(true, Interpolator.LINEAR.interpolate(false, true, 1.0));
94
95 assertEquals(1.0, Interpolator.LINEAR.interpolate(1.0, 2.0, 0.0), EPSILON);
96 assertEquals(1.1, Interpolator.LINEAR.interpolate(1.0, 2.0, 0.1), EPSILON);
97 assertEquals(1.5, Interpolator.LINEAR.interpolate(1.0, 2.0, 0.5), EPSILON);
98 assertEquals(1.9, Interpolator.LINEAR.interpolate(1.0, 2.0, 0.9), EPSILON);
99 assertEquals(2.0, Interpolator.LINEAR.interpolate(1.0, 2.0, 1.0), EPSILON);
100
101 assertEquals(-3, Interpolator.LINEAR.interpolate(-3, 7, 0.0));
102 assertEquals(-2, Interpolator.LINEAR.interpolate(-3, 7, 0.1));
103 assertEquals( 2, Interpolator.LINEAR.interpolate(-3, 7, 0.5));
104 assertEquals( 6, Interpolator.LINEAR.interpolate(-3, 7, 0.9));
105 assertEquals( 7, Interpolator.LINEAR.interpolate(-3, 7, 1.0));
106
107 assertEquals(-3L, Interpolator.LINEAR.interpolate(-3L, 7L, 0.0));
108 assertEquals(-2L, Interpolator.LINEAR.interpolate(-3L, 7L, 0.1));
109 assertEquals( 2L, Interpolator.LINEAR.interpolate(-3L, 7L, 0.5));
110 assertEquals( 6L, Interpolator.LINEAR.interpolate(-3L, 7L, 0.9));
111 assertEquals( 7L, Interpolator.LINEAR.interpolate(-3L, 7L, 1.0));
112
113 assertEquals( 0, ((DummyInterpolatable)Interpolator.LINEAR.interpolate(START, END, 0.0)).value, EPSILON);
114 assertEquals( 1, ((DummyInterpolatable)Interpolator.LINEAR.interpolate(START, END, 0.1)).value, EPSILON);
115 assertEquals( 5, ((DummyInterpolatable)Interpolator.LINEAR.interpolate(START, END, 0.5)).value, EPSILON);
116 assertEquals( 9, ((DummyInterpolatable)Interpolator.LINEAR.interpolate(START, END, 0.9)).value, EPSILON);
117 assertEquals(10, ((DummyInterpolatable)Interpolator.LINEAR.interpolate(START, END, 1.0)).value, EPSILON);
118 }
119
120 @Test
121 public void testEASE_BOTH() {
122 // Expected results calculated with JavaFX SDK 1.3
123
124 assertEquals(false, Interpolator.EASE_BOTH.interpolate(false, true, 0.0));
125 assertEquals(false, Interpolator.EASE_BOTH.interpolate(false, true, 0.1));
126 assertEquals(false, Interpolator.EASE_BOTH.interpolate(false, true, 0.5));
127 assertEquals(false, Interpolator.EASE_BOTH.interpolate(false, true, 0.9));
128 assertEquals(true, Interpolator.EASE_BOTH.interpolate(false, true, 1.0));
129
130 assertEquals(1.0, Interpolator.EASE_BOTH.interpolate(1.0, 2.0, 0.0), EPSILON);
131 assertEquals(1.125, Interpolator.EASE_BOTH.interpolate(1.0, 2.0, 0.2), EPSILON);
132 assertEquals(1.5, Interpolator.EASE_BOTH.interpolate(1.0, 2.0, 0.5), EPSILON);
133 assertEquals(1.875, Interpolator.EASE_BOTH.interpolate(1.0, 2.0, 0.8), EPSILON);
134 assertEquals(2.0, Interpolator.EASE_BOTH.interpolate(1.0, 2.0, 1.0), EPSILON);
135
136 assertEquals(-3, Interpolator.EASE_BOTH.interpolate(-3, 7, 0.0));
137 assertEquals(-2, Interpolator.EASE_BOTH.interpolate(-3, 7, 0.2));
138 assertEquals( 2, Interpolator.EASE_BOTH.interpolate(-3, 7, 0.5));
139 assertEquals( 6, Interpolator.EASE_BOTH.interpolate(-3, 7, 0.8));
140 assertEquals( 7, Interpolator.EASE_BOTH.interpolate(-3, 7, 1.0));
141
142 assertEquals(-3L, Interpolator.EASE_BOTH.interpolate(-3L, 7L, 0.0));
143 assertEquals(-2L, Interpolator.EASE_BOTH.interpolate(-3L, 7L, 0.2));
144 assertEquals( 2L, Interpolator.EASE_BOTH.interpolate(-3L, 7L, 0.5));
145 assertEquals( 6L, Interpolator.EASE_BOTH.interpolate(-3L, 7L, 0.8));
146 assertEquals( 7L, Interpolator.EASE_BOTH.interpolate(-3L, 7L, 1.0));
147
148 assertEquals( 0, ((DummyInterpolatable)Interpolator.EASE_BOTH.interpolate(START, END, 0.0)).value, EPSILON);
149 assertEquals( 1.25, ((DummyInterpolatable)Interpolator.EASE_BOTH.interpolate(START, END, 0.2)).value, EPSILON);
150 assertEquals( 5, ((DummyInterpolatable)Interpolator.EASE_BOTH.interpolate(START, END, 0.5)).value, EPSILON);
151 assertEquals( 8.75, ((DummyInterpolatable)Interpolator.EASE_BOTH.interpolate(START, END, 0.8)).value, EPSILON);
152 assertEquals(10, ((DummyInterpolatable)Interpolator.EASE_BOTH.interpolate(START, END, 1.0)).value, EPSILON);
153 }
154
155 @Test
156 public void testEASE_IN() {
157 // Expected results calculated with JavaFX SDK 1.3
158
159 assertEquals(false, Interpolator.EASE_IN.interpolate(false, true, 0.0));
160 assertEquals(false, Interpolator.EASE_IN.interpolate(false, true, 0.1));
161 assertEquals(false, Interpolator.EASE_IN.interpolate(false, true, 0.5));
162 assertEquals(false, Interpolator.EASE_IN.interpolate(false, true, 0.9));
163 assertEquals(true, Interpolator.EASE_IN.interpolate(false, true, 1.0));
164
165 assertEquals(1.0, Interpolator.EASE_IN.interpolate(1.0, 2.0, 0.0), EPSILON);
166 assertEquals(1.1111111111111112, Interpolator.EASE_IN.interpolate(1.0, 2.0, 0.2), EPSILON);
167 assertEquals(1.4444444444444444, Interpolator.EASE_IN.interpolate(1.0, 2.0, 0.5), EPSILON);
168 assertEquals(1.777777777777778, Interpolator.EASE_IN.interpolate(1.0, 2.0, 0.8), EPSILON);
169 assertEquals(2.0, Interpolator.EASE_IN.interpolate(1.0, 2.0, 1.0), EPSILON);
170
171 assertEquals(-3, Interpolator.EASE_IN.interpolate(-3, 7, 0.0));
172 assertEquals(-2, Interpolator.EASE_IN.interpolate(-3, 7, 0.2));
173 assertEquals( 1, Interpolator.EASE_IN.interpolate(-3, 7, 0.5));
174 assertEquals( 5, Interpolator.EASE_IN.interpolate(-3, 7, 0.8));
175 assertEquals( 7, Interpolator.EASE_IN.interpolate(-3, 7, 1.0));
176
177 assertEquals(-3L, Interpolator.EASE_IN.interpolate(-3L, 7L, 0.0));
178 assertEquals(-2L, Interpolator.EASE_IN.interpolate(-3L, 7L, 0.2));
179 assertEquals( 1L, Interpolator.EASE_IN.interpolate(-3L, 7L, 0.5));
180 assertEquals( 5L, Interpolator.EASE_IN.interpolate(-3L, 7L, 0.8));
181 assertEquals( 7L, Interpolator.EASE_IN.interpolate(-3L, 7L, 1.0));
182
183 assertEquals( 0, ((DummyInterpolatable)Interpolator.EASE_IN.interpolate(START, END, 0.0)).value, EPSILON);
184 assertEquals( 1.1111111111111114, ((DummyInterpolatable)Interpolator.EASE_IN.interpolate(START, END, 0.2)).value, EPSILON);
185 assertEquals( 4.444444444444445, ((DummyInterpolatable)Interpolator.EASE_IN.interpolate(START, END, 0.5)).value, EPSILON);
186 assertEquals( 7.777777777777779, ((DummyInterpolatable)Interpolator.EASE_IN.interpolate(START, END, 0.8)).value, EPSILON);
187 assertEquals(10, ((DummyInterpolatable)Interpolator.EASE_IN.interpolate(START, END, 1.0)).value, EPSILON);
188 }
189
190 @Test
191 public void testEASE_OUT() {
192 // Expected results calculated with JavaFX SDK 1.3
193
194 assertEquals(false, Interpolator.EASE_OUT.interpolate(false, true, 0.0));
195 assertEquals(false, Interpolator.EASE_OUT.interpolate(false, true, 0.1));
196 assertEquals(false, Interpolator.EASE_OUT.interpolate(false, true, 0.5));
197 assertEquals(false, Interpolator.EASE_OUT.interpolate(false, true, 0.9));
198 assertEquals(true, Interpolator.EASE_OUT.interpolate(false, true, 1.0));
199
200 assertEquals(1.0, Interpolator.EASE_OUT.interpolate(1.0, 2.0, 0.0), EPSILON);
201 assertEquals(1.2222222222222223, Interpolator.EASE_OUT.interpolate(1.0, 2.0, 0.2), EPSILON);
202 assertEquals(1.5555555555555556, Interpolator.EASE_OUT.interpolate(1.0, 2.0, 0.5), EPSILON);
203 assertEquals(1.8888888888888888, Interpolator.EASE_OUT.interpolate(1.0, 2.0, 0.8), EPSILON);
204 assertEquals(2.0, Interpolator.EASE_OUT.interpolate(1.0, 2.0, 1.0), EPSILON);
205
206 assertEquals(-3, Interpolator.EASE_OUT.interpolate(-3, 7, 0.0));
207 assertEquals(-1, Interpolator.EASE_OUT.interpolate(-3, 7, 0.2));
208 assertEquals( 3, Interpolator.EASE_OUT.interpolate(-3, 7, 0.5));
209 assertEquals( 6, Interpolator.EASE_OUT.interpolate(-3, 7, 0.8));
210 assertEquals( 7, Interpolator.EASE_OUT.interpolate(-3, 7, 1.0));
211
212 assertEquals(-3L, Interpolator.EASE_OUT.interpolate(-3L, 7L, 0.0));
213 assertEquals(-1L, Interpolator.EASE_OUT.interpolate(-3L, 7L, 0.2));
214 assertEquals( 3L, Interpolator.EASE_OUT.interpolate(-3L, 7L, 0.5));
215 assertEquals( 6L, Interpolator.EASE_OUT.interpolate(-3L, 7L, 0.8));
216 assertEquals( 7L, Interpolator.EASE_OUT.interpolate(-3L, 7L, 1.0));
217
218 assertEquals( 0, ((DummyInterpolatable)Interpolator.EASE_OUT.interpolate(START, END, 0.0)).value, EPSILON);
219 assertEquals( 2.2222222222222223, ((DummyInterpolatable)Interpolator.EASE_OUT.interpolate(START, END, 0.2)).value, EPSILON);
220 assertEquals( 5.555555555555555, ((DummyInterpolatable)Interpolator.EASE_OUT.interpolate(START, END, 0.5)).value, EPSILON);
221 assertEquals( 8.88888888888889, ((DummyInterpolatable)Interpolator.EASE_OUT.interpolate(START, END, 0.8)).value, EPSILON);
222 assertEquals(10, ((DummyInterpolatable)Interpolator.EASE_OUT.interpolate(START, END, 1.0)).value, EPSILON);
223 }
224
225 @Test
226 public void testSPLINE_Concave() {
227 Interpolator i = Interpolator.SPLINE(0.0, 0.5, 0.5, 1.0);
228 assertEquals(1.0, i.interpolate(1.0, 2.0, 0.0), EPSILON);
229 assertEquals(1.5573742287206063, i.interpolate(1.0, 2.0, 0.2), EPSILON);
230 assertEquals(1.8400223953585164, i.interpolate(1.0, 2.0, 0.5), EPSILON);
231 assertEquals(1.9742173260814238, i.interpolate(1.0, 2.0, 0.8), EPSILON);
232 assertEquals(2.0, i.interpolate(1.0, 2.0, 1.0), EPSILON);
233 }
234
235 @Test
236 public void testSPLINE_Convex() {
237 Interpolator i = Interpolator.SPLINE(0.5, 0.0, 1.0, 0.5);
238 assertEquals(1.0, i.interpolate(1.0, 2.0, 0.0), EPSILON);
239 assertEquals(1.0257826739185762, i.interpolate(1.0, 2.0, 0.2), EPSILON);
240 assertEquals(1.1599776046414838, i.interpolate(1.0, 2.0, 0.5), EPSILON);
241 assertEquals(1.4426257712793937, i.interpolate(1.0, 2.0, 0.8), EPSILON);
242 assertEquals(2.0, i.interpolate(1.0, 2.0, 1.0), EPSILON);
243 }
244
245 @Test
246 public void testSPLINE_WithInflectionPoint() {
247 Interpolator i = Interpolator.SPLINE(0.0, 1.0, 1.0, 0.0);
248
249 assertEquals(1.0, i.interpolate(1.0, 2.0, 0.0), EPSILON);
250 assertEquals(1.4614221762502215, i.interpolate(1.0, 2.0, 0.2), EPSILON);
251 assertEquals(1.5, i.interpolate(1.0, 2.0, 0.5), EPSILON);
252 assertEquals(1.5385778237497787, i.interpolate(1.0, 2.0, 0.8), EPSILON);
253 assertEquals(2.0, i.interpolate(1.0, 2.0, 1.0), EPSILON);
254 }
255
256 @Test
257 public void testSPLINE_Linear() {
258 Interpolator i = Interpolator.SPLINE(1/3, 1/3, 2/3, 2/3);
259
260 assertEquals(1.0, i.interpolate(1.0, 2.0, 0.0), EPSILON);
261 assertEquals(1.2, i.interpolate(1.0, 2.0, 0.2), EPSILON);
262 assertEquals(1.5, i.interpolate(1.0, 2.0, 0.5), EPSILON);
263 assertEquals(1.8, i.interpolate(1.0, 2.0, 0.8), EPSILON);
264 assertEquals(2.0, i.interpolate(1.0, 2.0, 1.0), EPSILON);
265 }
266
267 @Test
268 public void testTANGENT_Linear() {
269 SimpleLongProperty property = new SimpleLongProperty();
270
271 Interpolator i0 = Interpolator.TANGENT(Duration.seconds(1), 20);
272 Interpolator i1 = Interpolator.TANGENT(Duration.seconds(1), 40);
273
274 InterpolationInterval interval = InterpolationInterval.create(new KeyValue(property, 60L, i1),
275 TickCalculation.fromDuration(Duration.seconds(3)),
276 new KeyValue(property, 0L, i0), TickCalculation.fromDuration(Duration.seconds(3)));
277
278 interval.interpolate(1.0/3.0);
279 assertEquals(20L, (long)property.getValue());
280 interval.interpolate(1.0/2.0);
281 assertEquals(30L, (long)property.getValue());
282 interval.interpolate(2.0/3.0);
283 assertEquals(40L, (long)property.getValue());
284 }
285
286 private static class DummyInterpolatable implements Interpolatable<DummyInterpolatable> {
287
288 final double value;
289
290 private DummyInterpolatable(double value) {
291 this.value = value;
292 }
293
294 @Override
295 public DummyInterpolatable interpolate(DummyInterpolatable endVal, double t) {
296 if (Math.abs(t) < EPSILON) {
297 return this;
298 } else if (Math.abs(t-1.0) < EPSILON) {
299 return endVal;
300 } else {
301 return new DummyInterpolatable(value + t * (endVal.value - value));
302 }
303 }
304 }
305 }