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mik9/Interpolators.java

Created March 13, 2014 13:01
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  1. mik9 created this gist Mar 13, 2014.
    132 changes: 132 additions & 0 deletions Interpolators.java
    View file
    Original file line number Diff line number Diff line change
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    /*
    * Copyright (C) 2011 The Android Open Source Project
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this 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.
    */

    package com.example.app;

    import android.view.animation.Interpolator;

    class Interpolators {
    private static final float DOMAIN = 1.0f;
    private static final float DURATION = 1.0f;
    private static final float START = 0.0f;

    static class Linear {
    public static final Interpolator easeNone = new Interpolator() {
    public float getInterpolation(float input) {
    return input;
    }
    };
    }

    static class Cubic {
    public static final Interpolator easeIn = new Interpolator() {
    public float getInterpolation(float input) {
    return DOMAIN*(input/=DURATION)*input*input + START;
    }
    };
    public static final Interpolator easeOut = new Interpolator() {
    public float getInterpolation(float input) {
    return DOMAIN*((input=input/DURATION-1)*input*input + 1) + START;
    }
    };
    public static final Interpolator easeInOut = new Interpolator() {
    public float getInterpolation(float input) {
    return ((input/=DURATION/2) < 1.0f) ?
    (DOMAIN/2*input*input*input + START)
    : (DOMAIN/2*((input-=2)*input*input + 2) + START);
    }
    };
    }

    static class Quad {
    public static final Interpolator easeIn = new Interpolator() {
    public float getInterpolation (float input) {
    return DOMAIN*(input/=DURATION)*input + START;
    }
    };
    public static final Interpolator easeOut = new Interpolator() {
    public float getInterpolation(float input) {
    return -DOMAIN *(input/=DURATION)*(input-2) + START;
    }
    };
    public static final Interpolator easeInOut = new Interpolator() {
    public float getInterpolation(float input) {
    return ((input/=DURATION/2) < 1) ?
    (DOMAIN/2*input*input + START)
    : (-DOMAIN/2 * ((--input)*(input-2) - 1) + START);
    }
    };
    }

    static class Quart {
    public static final Interpolator easeIn = new Interpolator() {
    public float getInterpolation(float input) {
    return DOMAIN*(input/=DURATION)*input*input*input + START;
    }
    };
    public static final Interpolator easeOut = new Interpolator() {
    public float getInterpolation(float input) {
    return -DOMAIN * ((input=input/DURATION-1)*input*input*input - 1) + START;
    }
    };
    public static final Interpolator easeInOut = new Interpolator() {
    public float getInterpolation(float input) {
    return ((input/=DURATION/2) < 1) ?
    (DOMAIN/2*input*input*input*input + START)
    : (-DOMAIN/2 * ((input-=2)*input*input*input - 2) + START);
    }
    };
    }

    static class Quint {
    public static final Interpolator easeIn = new Interpolator() {
    public float getInterpolation(float input) {
    return DOMAIN*(input/=DURATION)*input*input*input*input + START;
    }
    };
    public static final Interpolator easeOut = new Interpolator() {
    public float getInterpolation(float input) {
    return DOMAIN*((input=input/DURATION-1)*input*input*input*input + 1) + START;
    }
    };
    public static final Interpolator easeInOut = new Interpolator() {
    public float getInterpolation(float input) {
    return ((input/=DURATION/2) < 1) ?
    (DOMAIN/2*input*input*input*input*input + START)
    : (DOMAIN/2*((input-=2)*input*input*input*input + 2) + START);
    }
    };
    }

    static class Sine {
    public static final Interpolator easeIn = new Interpolator() {
    public float getInterpolation(float input) {
    return -DOMAIN * (float) Math.cos(input/DURATION * (Math.PI/2)) + DOMAIN + START;
    }
    };
    public static final Interpolator easeOut = new Interpolator() {
    public float getInterpolation(float input) {
    return DOMAIN * (float) Math.sin(input/DURATION * (Math.PI/2)) + START;
    }
    };
    public static final Interpolator easeInOut = new Interpolator() {
    public float getInterpolation(float input) {
    return -DOMAIN/2 * ((float)Math.cos(Math.PI*input/DURATION) - 1.0f) + START;
    }
    };
    }

    }