/libs/cocos2d/CCPropertyAction.m

 1/*
 2 * cocos2d for iPhone: http://www.cocos2d-iphone.org
 3 *
 4 * Copyright 2009 lhunath (Maarten Billemont)
 5 *
 6 * Permission is hereby granted, free of charge, to any person obtaining a copy
 7 * of this software and associated documentation files (the "Software"), to deal
 8 * in the Software without restriction, including without limitation the rights
 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 * 
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 * 
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 *
24 */
25
26#import "CCPropertyAction.h"
27
28
29@implementation CCPropertyAction
30
31+ (id)actionWithDuration:(ccTime)aDuration key:(NSString *)aKey from:(float)aFrom to:(float)aTo {
32
33	return [[[[self class] alloc] initWithDuration:aDuration key:aKey from:aFrom to:aTo] autorelease];
34}
35
36
37- (id)initWithDuration:(ccTime)aDuration key:(NSString *)key from:(float)from to:(float)to {
38    
39	if ((self = [super initWithDuration:aDuration])) {
40    
41		key_	= [key copy];
42		to_		= to;
43		from_	= from;
44
45	}
46    
47	return self;
48}
49
50- (void) dealloc
51{
52	[key_ release];
53	[super dealloc];
54}
55
56- (void)startWithTarget:aTarget
57{
58    
59	[super startWithTarget:aTarget];
60    
61	delta_ = to_ - from_;
62}
63
64- (void) update:(ccTime) dt {
65    
66	[target setValue:[NSNumber numberWithFloat:to_  - delta_ * (1 - dt)] forKey:key_];
67}
68
69- (CCIntervalAction *) reverse
70{
71	return [[self class] actionWithDuration:duration key:key_ from:to_ to:from_];
72}
73
74
75@end