diff options
Diffstat (limited to 'src/main/java/cc/polyfrost/oneconfig/gui/animations')
| -rw-r--r-- | src/main/java/cc/polyfrost/oneconfig/gui/animations/Animation.java | 2 | ||||
| -rw-r--r-- | src/main/java/cc/polyfrost/oneconfig/gui/animations/CubicBezier.java | 102 |
2 files changed, 103 insertions, 1 deletions
diff --git a/src/main/java/cc/polyfrost/oneconfig/gui/animations/Animation.java b/src/main/java/cc/polyfrost/oneconfig/gui/animations/Animation.java index 30fcc4e..77556b5 100644 --- a/src/main/java/cc/polyfrost/oneconfig/gui/animations/Animation.java +++ b/src/main/java/cc/polyfrost/oneconfig/gui/animations/Animation.java @@ -33,7 +33,7 @@ public abstract class Animation { */ public float get(float deltaTime) { timePassed += deltaTime; - if (timePassed >= duration) timePassed = duration; + if (timePassed >= duration) return start + change; return animate(timePassed / duration) * change + start; } diff --git a/src/main/java/cc/polyfrost/oneconfig/gui/animations/CubicBezier.java b/src/main/java/cc/polyfrost/oneconfig/gui/animations/CubicBezier.java new file mode 100644 index 0000000..f7848da --- /dev/null +++ b/src/main/java/cc/polyfrost/oneconfig/gui/animations/CubicBezier.java @@ -0,0 +1,102 @@ +/* This file contains an adaptation of code from The Android Open Source + * Project found at <https://cs.android.com/> + * For the avoidance of doubt, this file is still licensed under the terms + * of OneConfig's Licensing. + * + * LICENSE NOTICE FOR ADAPTED CODE + * + * Copyright 2019 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use the file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * Significant changes (as required by the Apache 2.0): + * - Changed variable names + * - Code adapted from Kotlin to Java + * - Removed variables defining premade easing functions + * - Added constructor for JDT and OneConfig's animation system + * + * As per the terms of the Apache 2.0 License, a copy of the License + * is found at `src/main/resources/licenses/Android-License.txt`. + */ + +package cc.polyfrost.oneconfig.gui.animations; + +public class CubicBezier extends Animation { + private static final float CubicErrorBound = 0.001f; + protected final float P0; + protected final float P1; + protected final float P2; + protected final float P3; + + /** + * @param P0 First control point X + * @param P1 First control point Y + * @param P2 Second control point X + * @param P3 Second control point Y + * @param duration The duration of the animation + * @param start The start of the animation + * @param end The end of the animation + * @param reverse Reverse the animation + */ + public CubicBezier(float P0, float P1, float P2, float P3, float duration, float start, float end, boolean reverse) { + super(duration, start, end, reverse); + this.P0 = P0; + this.P1 = P1; + this.P2 = P2; + this.P3 = P3; + } + + /** + * This constructor should be used with JDT's getCubicBezier method + * + * @param points The control points + * @param duration The duration of the animation + * @param start The start of the animation + * @param end The end of the animation + * @param reverse Reverse the animation + */ + public CubicBezier(float[] points, float duration, float start, float end, boolean reverse) { + this(points[0], points[1], points[2], points[3], duration, start, end, reverse); + } + + /** + * Adapted from <a href="https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:compose/animation/animation-core/src/commonMain/kotlin/androidx/compose/animation/core/Easing.kt">Android</a> + * Under Apache 2.0 license + * + * @param x The current point + * @return The value + */ + @Override + protected float animate(float x) { + float start = 0.0f; + float end = 1.0f; + while (true) { + float midpoint = (start + end) / 2; + float estimate = evaluateCubic(P0, P2, midpoint); + if (Math.abs(x - estimate) < CubicErrorBound) + return evaluateCubic(P1, P3, midpoint); + if (estimate < x) start = midpoint; + else end = midpoint; + } + } + + /** + * Adapted from <a href="https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:compose/animation/animation-core/src/commonMain/kotlin/androidx/compose/animation/core/Easing.kt">Android</a> + * Under Apache 2.0 license + */ + private float evaluateCubic(float a, float b, float m) { + return 3 * a * (1 - m) * (1 - m) * m + + 3 * b * (1 - m) * /* */ m * m + + /* */ m * m * m; + } +} |