Sine

Kind of class:	class
Inherits from:	none
Author:	Arthur Clemens
Classpath:	org.asapframework.util.transitions.tween.Sine
File last modified:	Thursday, 12 October 2006, 11:19:40

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/*
Copyright 2005-2006 by the authors of asapframework, http://asapframework.org

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.
*/

/**
Sine tween functions.
@author Arthur Clemens
*/

class org.asapframework.util.transitions.tween.Sine {

    /**
    @param t : current time
    @param b : beginning value
    @param c : total change
    @param d : duration
    */
    static function easeIn (t:Number, b:Number, c:Number, d:Number) : Number {
        return -c * Math.cos(t/d * (Math.PI/2)) + c + b;
    }
    
    /**
    @param t : current time
    @param b : beginning value
    @param c : total change
    @param d : duration
    */
    static function easeOut (t:Number, b:Number, c:Number, d:Number) : Number {
        return c * Math.sin(t/d * (Math.PI/2)) + b;
    }
    
    /**
    @param t : current time
    @param b : beginning value
    @param c : total change
    @param d : duration
    */
    static function easeInOut (t:Number, b:Number, c:Number, d:Number) : Number {
        return -c/2 * (Math.cos(Math.PI*t/d) - 1) + b;
    }

}

Sine tween functions.

Summary

Class methods

easeIn (t:Number, b:Number, c:Number, d:Number) : Number
easeOut (t:Number, b:Number, c:Number, d:Number) : Number
easeInOut (t:Number, b:Number, c:Number, d:Number) : Number

Class methods

easeIn

static function easeIn (

t:Number, b:Number, c:Number, d:Number) : Number

Parameters:

current time

beginning value

total change

duration

easeInOut

static function easeInOut (

t:Number, b:Number, c:Number, d:Number) : Number

Parameters:

current time

beginning value

total change

duration

easeOut

static function easeOut (

t:Number, b:Number, c:Number, d:Number) : Number

Parameters:

current time

beginning value

total change

duration