From 9cd57b731ab1c666d4a1cb725538fdc137763d12 Mon Sep 17 00:00:00 2001
From: Starla Insigna <starla4444@gmail.com>
Date: Sat, 30 Jul 2011 11:19:14 -0400
Subject: Initial commit (version 0.2.1)

---
 libs/cocos2d/CCParallaxNode.m | 161 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 161 insertions(+)
 create mode 100755 libs/cocos2d/CCParallaxNode.m

(limited to 'libs/cocos2d/CCParallaxNode.m')

diff --git a/libs/cocos2d/CCParallaxNode.m b/libs/cocos2d/CCParallaxNode.m
new file mode 100755
index 0000000..9d39cc8
--- /dev/null
+++ b/libs/cocos2d/CCParallaxNode.m
@@ -0,0 +1,161 @@
+/*
+ * cocos2d for iPhone: http://www.cocos2d-iphone.org
+ *
+ * Copyright (c) 2009-2010 Ricardo Quesada
+ * Copyright (c) 2011 Zynga Inc.
+ * 
+ * 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 "CCParallaxNode.h"
+#import "Support/CGPointExtension.h"
+#import "Support/ccCArray.h"
+
+@interface CGPointObject : NSObject
+{
+	CGPoint	ratio_;
+	CGPoint offset_;
+	CCNode *child_;	// weak ref
+}
+@property (readwrite) CGPoint ratio;
+@property (readwrite) CGPoint offset;
+@property (readwrite,assign) CCNode *child;
++(id) pointWithCGPoint:(CGPoint)point offset:(CGPoint)offset;
+-(id) initWithCGPoint:(CGPoint)point offset:(CGPoint)offset;
+@end
+@implementation CGPointObject
+@synthesize ratio = ratio_;
+@synthesize offset = offset_;
+@synthesize child=child_;
+
++(id) pointWithCGPoint:(CGPoint)ratio offset:(CGPoint)offset
+{
+	return [[[self alloc] initWithCGPoint:ratio offset:offset] autorelease];
+}
+-(id) initWithCGPoint:(CGPoint)ratio offset:(CGPoint)offset
+{
+	if( (self=[super init])) {
+		ratio_ = ratio;
+		offset_ = offset;
+	}
+	return self;
+}
+@end
+
+@implementation CCParallaxNode
+
+@synthesize parallaxArray = parallaxArray_;
+
+-(id) init
+{
+	if( (self=[super init]) ) {
+		parallaxArray_ = ccArrayNew(5);		
+		lastPosition = CGPointMake(-100,-100);
+	}
+	return self;
+}
+
+- (void) dealloc
+{
+	if( parallaxArray_ ) {
+		ccArrayFree(parallaxArray_);
+		parallaxArray_ = nil;
+	}
+	[super dealloc];
+}
+
+-(void) addChild:(CCNode*)child z:(NSInteger)z tag:(NSInteger)tag
+{
+	NSAssert(NO,@"ParallaxNode: use addChild:z:parallaxRatio:positionOffset instead");
+}
+
+-(void) addChild: (CCNode*) child z:(NSInteger)z parallaxRatio:(CGPoint)ratio positionOffset:(CGPoint)offset
+{
+	NSAssert( child != nil, @"Argument must be non-nil");
+	CGPointObject *obj = [CGPointObject pointWithCGPoint:ratio offset:offset];
+	obj.child = child;
+	ccArrayAppendObjectWithResize(parallaxArray_, obj);
+	
+	CGPoint pos = self.position;
+	pos.x = pos.x * ratio.x + offset.x;
+	pos.y = pos.y * ratio.y + offset.y;
+	child.position = pos;
+	
+	[super addChild: child z:z tag:child.tag];
+}
+
+-(void) removeChild:(CCNode*)node cleanup:(BOOL)cleanup
+{
+	for( unsigned int i=0;i < parallaxArray_->num;i++) {
+		CGPointObject *point = parallaxArray_->arr[i];
+		if( [point.child isEqual:node] ) {
+			ccArrayRemoveObjectAtIndex(parallaxArray_, i);
+			break;
+		}
+	}
+	[super removeChild:node cleanup:cleanup];
+}
+
+-(void) removeAllChildrenWithCleanup:(BOOL)cleanup
+{
+	ccArrayRemoveAllObjects(parallaxArray_);
+	[super removeAllChildrenWithCleanup:cleanup];
+}
+
+-(CGPoint) absolutePosition_
+{
+	CGPoint ret = position_;
+	
+	CCNode *cn = self;
+	
+	while (cn.parent != nil) {
+		cn = cn.parent;
+		ret = ccpAdd( ret,  cn.position );
+	}
+	
+	return ret;
+}
+
+/*
+ The positions are updated at visit because:
+   - using a timer is not guaranteed that it will called after all the positions were updated
+   - overriding "draw" will only precise if the children have a z > 0
+*/
+-(void) visit
+{
+//	CGPoint pos = position_;
+//	CGPoint	pos = [self convertToWorldSpace:CGPointZero];
+	CGPoint pos = [self absolutePosition_];
+	if( ! CGPointEqualToPoint(pos, lastPosition) ) {
+		
+		for(unsigned int i=0; i < parallaxArray_->num; i++ ) {
+
+			CGPointObject *point = parallaxArray_->arr[i];
+			float x = -pos.x + pos.x * point.ratio.x + point.offset.x;
+			float y = -pos.y + pos.y * point.ratio.y + point.offset.y;			
+			point.child.position = ccp(x,y);
+		}
+		
+		lastPosition = pos;
+	}
+	
+	[super visit];
+}
+@end
-- 
cgit 1.4.1