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/*
* This file is part of OneConfig.
* OneConfig - Next Generation Config Library for Minecraft: Java Edition
* Copyright (C) 2021, 2022 Polyfrost.
* <https://polyfrost.cc> <https://github.com/Polyfrost/>
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* OneConfig is licensed under the terms of version 3 of the GNU Lesser
* General Public License as published by the Free Software Foundation, AND
* under the Additional Terms Applicable to OneConfig, as published by Polyfrost,
* either version 1.0 of the Additional Terms, or (at your option) any later
* version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License. If not, see <https://www.gnu.org/licenses/>. You should
* have also received a copy of the Additional Terms Applicable
* to OneConfig, as published by Polyfrost. If not, see
* <https://polyfrost.cc/legal/oneconfig/additional-terms>
*/
package cc.polyfrost.oneconfig.gui.animations;
import cc.polyfrost.oneconfig.utils.gui.GuiUtils;
public abstract class Animation {
protected final boolean reverse;
protected final float duration;
protected final float start;
protected final float change;
protected float timePassed = 0;
/**
* @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 Animation(float duration, float start, float end, boolean reverse) {
this.duration = duration;
if (reverse) {
float temp = start;
start = end;
end = temp;
}
this.start = start;
this.change = end - start;
this.reverse = reverse;
}
/**
* @param deltaTime The time since the last frame
* @return The new value
*/
public float get(float deltaTime) {
timePassed += deltaTime;
if (timePassed >= duration) return start + change;
return animate(timePassed / duration) * change + start;
}
/**
* @return The new value
*/
public float get() {
return get(GuiUtils.getDeltaTime());
}
/**
* @return If the animation is finished or not
*/
public boolean isFinished() {
return timePassed >= duration;
}
/**
* @return If the animation is reversed
*/
public boolean isReversed() {
return reverse;
}
/**
* @return The start position of the animation
*/
public float getStart() {
return start;
}
/**
* @return The end position of the animation
*/
public float getEnd() {
return start + change;
}
protected abstract float animate(float x);
}
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