1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package android.transition.cts; 17 18 import android.graphics.Path; 19 import android.graphics.PathMeasure; 20 import android.transition.ArcMotion; 21 22 import junit.framework.TestCase; 23 24 public class ArcMotionTest extends PathMotionTest { 25 26 public void test90Quadrants() throws Throwable { 27 ArcMotion arcMotion = new ArcMotion(); 28 arcMotion.setMaximumAngle(90); 29 30 Path expected = arcWithPoint(0, 100, 100, 0, 100, 100); 31 Path path = arcMotion.getPath(0, 100, 100, 0); 32 assertPathMatches(expected, path); 33 34 expected = arcWithPoint(100, 0, 0, -100, 100, -100); 35 path = arcMotion.getPath(100, 0, 0, -100); 36 assertPathMatches(expected, path); 37 38 expected = arcWithPoint(0, -100, -100, 0, -100, -100); 39 path = arcMotion.getPath(0, -100, -100, 0); 40 assertPathMatches(expected, path); 41 42 expected = arcWithPoint(-100, 0, 0, 100, -100, 100); 43 path = arcMotion.getPath(-100, 0, 0, 100); 44 assertPathMatches(expected, path); 45 } 46 47 public void test345Triangles() throws Throwable { 48 // 3-4-5 triangles are easy to calculate the control points 49 ArcMotion arcMotion = new ArcMotion(); 50 arcMotion.setMaximumAngle(90); 51 Path expected; 52 Path path; 53 54 expected = arcWithPoint(0, 120, 160, 0, 125, 120); 55 path = arcMotion.getPath(0, 120, 160, 0); 56 assertPathMatches(expected, path); 57 58 expected = arcWithPoint(0, 160, 120, 0, 120, 125); 59 path = arcMotion.getPath(0, 160, 120, 0); 60 assertPathMatches(expected, path); 61 62 expected = arcWithPoint(-120, 0, 0, 160, -120, 125); 63 path = arcMotion.getPath(-120, 0, 0, 160); 64 assertPathMatches(expected, path); 65 66 expected = arcWithPoint(-160, 0, 0, 120, -125, 120); 67 path = arcMotion.getPath(-160, 0, 0, 120); 68 assertPathMatches(expected, path); 69 70 expected = arcWithPoint(0, -120, -160, 0, -125, -120); 71 path = arcMotion.getPath(0, -120, -160, 0); 72 assertPathMatches(expected, path); 73 74 expected = arcWithPoint(0, -160, -120, 0, -120, -125); 75 path = arcMotion.getPath(0, -160, -120, 0); 76 assertPathMatches(expected, path); 77 78 expected = arcWithPoint(120, 0, 0, -160, 120, -125); 79 path = arcMotion.getPath(120, 0, 0, -160); 80 assertPathMatches(expected, path); 81 82 expected = arcWithPoint(160, 0, 0, -120, 125, -120); 83 path = arcMotion.getPath(160, 0, 0, -120); 84 assertPathMatches(expected, path); 85 } 86 87 private Path arcWithPoint(float startX, float startY, float endX, float endY, 88 float eX, float eY) { 89 float c1x = (eX + startX)/2; 90 float c1y = (eY + startY)/2; 91 float c2x = (eX + endX)/2; 92 float c2y = (eY + endY)/2; 93 Path path = new Path(); 94 path.moveTo(startX, startY); 95 path.cubicTo(c1x, c1y, c2x, c2y, endX, endY); 96 return path; 97 } 98 99 public void testMaximumAngle() throws Throwable { 100 ArcMotion arcMotion = new ArcMotion(); 101 arcMotion.setMaximumAngle(45f); 102 assertEquals(45f, arcMotion.getMaximumAngle()); 103 104 float ratio = (float) Math.tan(Math.PI/8); 105 float ex = 50 + (50 * ratio); 106 float ey = ex; 107 108 Path expected = arcWithPoint(0, 100, 100, 0, ex, ey); 109 Path path = arcMotion.getPath(0, 100, 100, 0); 110 assertPathMatches(expected, path); 111 } 112 113 public void testMinimumHorizontalAngle() throws Throwable { 114 ArcMotion arcMotion = new ArcMotion(); 115 arcMotion.setMinimumHorizontalAngle(45); 116 assertEquals(45f, arcMotion.getMinimumHorizontalAngle()); 117 118 float ey = (float)(Math.tan(Math.PI/8) * 50); 119 float ex = 50; 120 Path expected = arcWithPoint(0, 0, 100, 0, ex, ey); 121 Path path = arcMotion.getPath(0, 0, 100, 0); 122 assertPathMatches(expected, path); 123 124 // Pretty much the same, but follows a different path. 125 expected = arcWithPoint(0, 0, 100.001f, 0, ex, ey); 126 path = arcMotion.getPath(0, 0, 100.001f, 0); 127 assertPathMatches(expected, path); 128 } 129 130 public void testMinimumVerticalAngle() throws Throwable { 131 ArcMotion arcMotion = new ArcMotion(); 132 arcMotion.setMinimumVerticalAngle(45); 133 assertEquals(45f, arcMotion.getMinimumVerticalAngle()); 134 135 float ex = (float)(Math.tan(Math.PI/8) * 50); 136 float ey = 50; 137 Path expected = arcWithPoint(0, 0, 0, 100, ex, ey); 138 Path path = arcMotion.getPath(0, 0, 0, 100); 139 assertPathMatches(expected, path); 140 141 // Pretty much the same, but follows a different path. 142 expected = arcWithPoint(0, 0, 0, 100.001f, ex, ey); 143 path = arcMotion.getPath(0, 0, 0, 100.001f); 144 assertPathMatches(expected, path); 145 } 146 } 147 148
