/*
 * cocos2d for iPhone: http://www.cocos2d-iphone.org
 *
 * Copyright 2009 lhunath (Maarten Billemont)
 * Copyright (c) 2013-2014 Cocos2D Authors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 */

#import "CCActionTween.h"


@implementation CCActionTween

+ (id)actionWithDuration:(CCTime)aDuration key:(NSString *)aKey from:(float)aFrom to:(float)aTo {

	return [[[self class] alloc] initWithDuration:aDuration key:aKey from:aFrom to:aTo];
}

- (id)initWithDuration:(CCTime)aDuration key:(NSString *)key from:(float)from to:(float)to {

	if ((self = [super initWithDuration:aDuration])) {

		_key	= [key copy];
		_to		= to;
		_from	= from;

	}

	return self;
}

-(id) copyWithZone: (NSZone*) zone
{
    CCAction *copy = [[[self class] allocWithZone: zone] initWithDuration: [self duration] key:_key from:_from to:_to];
    return copy;
}

- (void)startWithTarget:aTarget
{
	[super startWithTarget:aTarget];
	_delta = _to - _from;
}

- (void) update:(CCTime) dt
{
	[_target setValue:[NSNumber numberWithFloat:_to  - _delta * (1 - dt)] forKey:_key];
}

- (CCActionInterval *) reverse
{
	return [[self class] actionWithDuration:_duration key:_key from:_to to:_from];
}


@end
