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+/*
+ * cocos2d for iPhone: http://www.cocos2d-iphone.org
+ *
+ * Copyright (c) 2009 Valentin Milea
+ *
+ * Copyright (c) 2008-2010 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 "CCNode.h"
+#import "CCGrid.h"
+#import "CCDirector.h"
+#import "CCActionManager.h"
+#import "CCCamera.h"
+#import "CCScheduler.h"
+#import "ccConfig.h"
+#import "ccMacros.h"
+#import "Support/CGPointExtension.h"
+#import "Support/ccCArray.h"
+#import "Support/TransformUtils.h"
+#import "ccMacros.h"
+
+#import <Availability.h>
+#ifdef __IPHONE_OS_VERSION_MAX_ALLOWED
+#import "Platforms/iOS/CCDirectorIOS.h"
+#endif
+
+
+#if CC_COCOSNODE_RENDER_SUBPIXEL
+#define RENDER_IN_SUBPIXEL
+#else
+#define RENDER_IN_SUBPIXEL (NSInteger)
+#endif
+
+@interface CCNode ()
+// lazy allocs
+-(void) childrenAlloc;
+// helper that reorder a child
+-(void) insertChild:(CCNode*)child z:(NSInteger)z;
+// used internally to alter the zOrder variable. DON'T call this method manually
+-(void) _setZOrder:(NSInteger) z;
+-(void) detachChild:(CCNode *)child cleanup:(BOOL)doCleanup;
+@end
+
+@implementation CCNode
+
+@synthesize children = children_;
+@synthesize visible = visible_;
+@synthesize parent = parent_;
+@synthesize grid = grid_;
+@synthesize zOrder = zOrder_;
+@synthesize tag = tag_;
+@synthesize vertexZ = vertexZ_;
+@synthesize isRunning = isRunning_;
+@synthesize userData = userData_;
+
+#pragma mark CCNode - Transform related properties
+
+@synthesize rotation = rotation_, scaleX = scaleX_, scaleY = scaleY_;
+@synthesize skewX = skewX_, skewY = skewY_;
+@synthesize position = position_, positionInPixels = positionInPixels_;
+@synthesize anchorPoint = anchorPoint_, anchorPointInPixels = anchorPointInPixels_;
+@synthesize contentSize = contentSize_, contentSizeInPixels = contentSizeInPixels_;
+@synthesize isRelativeAnchorPoint = isRelativeAnchorPoint_;
+
+// getters synthesized, setters explicit
+
+-(void) setSkewX:(float)newSkewX
+{
+        skewX_ = newSkewX;
+        isTransformDirty_ = isInverseDirty_ = YES;
+#if CC_NODE_TRANSFORM_USING_AFFINE_MATRIX
+        isTransformGLDirty_ = YES;
+#endif
+}
+
+-(void) setSkewY:(float)newSkewY
+{
+        skewY_ = newSkewY;
+        isTransformDirty_ = isInverseDirty_ = YES;
+#if CC_NODE_TRANSFORM_USING_AFFINE_MATRIX
+        isTransformGLDirty_ = YES;
+#endif
+}
+
+-(void) setRotation: (float)newRotation
+{
+        rotation_ = newRotation;
+        isTransformDirty_ = isInverseDirty_ = YES;
+#if CC_NODE_TRANSFORM_USING_AFFINE_MATRIX
+        isTransformGLDirty_ = YES;
+#endif
+}
+
+-(void) setScaleX: (float)newScaleX
+{
+        scaleX_ = newScaleX;
+        isTransformDirty_ = isInverseDirty_ = YES;
+#if CC_NODE_TRANSFORM_USING_AFFINE_MATRIX
+        isTransformGLDirty_ = YES;
+#endif  
+}
+
+-(void) setScaleY: (float)newScaleY
+{
+        scaleY_ = newScaleY;
+        isTransformDirty_ = isInverseDirty_ = YES;
+#if CC_NODE_TRANSFORM_USING_AFFINE_MATRIX
+        isTransformGLDirty_ = YES;
+#endif  
+}
+
+-(void) setPosition: (CGPoint)newPosition
+{
+        position_ = newPosition;
+        if( CC_CONTENT_SCALE_FACTOR() == 1 )
+                positionInPixels_ = position_;
+        else
+                positionInPixels_ = ccpMult( newPosition,  CC_CONTENT_SCALE_FACTOR() );
+        
+        isTransformDirty_ = isInverseDirty_ = YES;
+#if CC_NODE_TRANSFORM_USING_AFFINE_MATRIX
+        isTransformGLDirty_ = YES;
+#endif  
+}
+
+-(void) setPositionInPixels:(CGPoint)newPosition
+{
+        positionInPixels_ = newPosition;
+
+        if( CC_CONTENT_SCALE_FACTOR() == 1 )
+                position_ = positionInPixels_;
+        else
+                position_ = ccpMult( newPosition, 1/CC_CONTENT_SCALE_FACTOR() );
+        
+        isTransformDirty_ = isInverseDirty_ = YES;
+#if CC_NODE_TRANSFORM_USING_AFFINE_MATRIX
+        isTransformGLDirty_ = YES;
+#endif  
+}
+
+-(void) setIsRelativeAnchorPoint: (BOOL)newValue
+{
+        isRelativeAnchorPoint_ = newValue;
+        isTransformDirty_ = isInverseDirty_ = YES;
+#if CC_NODE_TRANSFORM_USING_AFFINE_MATRIX
+        isTransformGLDirty_ = YES;
+#endif  
+}
+
+-(void) setAnchorPoint:(CGPoint)point
+{
+        if( ! CGPointEqualToPoint(point, anchorPoint_) ) {
+                anchorPoint_ = point;
+                anchorPointInPixels_ = ccp( contentSizeInPixels_.width * anchorPoint_.x, contentSizeInPixels_.height * anchorPoint_.y );
+                isTransformDirty_ = isInverseDirty_ = YES;
+#if CC_NODE_TRANSFORM_USING_AFFINE_MATRIX
+                isTransformGLDirty_ = YES;
+#endif          
+        }
+}
+
+-(void) setContentSize:(CGSize)size
+{
+        if( ! CGSizeEqualToSize(size, contentSize_) ) {
+                contentSize_ = size;
+                
+                if( CC_CONTENT_SCALE_FACTOR() == 1 )
+                        contentSizeInPixels_ = contentSize_;
+                else
+                        contentSizeInPixels_ = CGSizeMake( size.width * CC_CONTENT_SCALE_FACTOR(), size.height * CC_CONTENT_SCALE_FACTOR() );
+                
+                anchorPointInPixels_ = ccp( contentSizeInPixels_.width * anchorPoint_.x, contentSizeInPixels_.height * anchorPoint_.y );
+                isTransformDirty_ = isInverseDirty_ = YES;
+#if CC_NODE_TRANSFORM_USING_AFFINE_MATRIX
+                isTransformGLDirty_ = YES;
+#endif          
+        }
+}
+
+-(void) setContentSizeInPixels:(CGSize)size
+{
+        if( ! CGSizeEqualToSize(size, contentSizeInPixels_) ) {
+                contentSizeInPixels_ = size;
+
+                if( CC_CONTENT_SCALE_FACTOR() == 1 )
+                        contentSize_ = contentSizeInPixels_;
+                else
+                        contentSize_ = CGSizeMake( size.width / CC_CONTENT_SCALE_FACTOR(), size.height / CC_CONTENT_SCALE_FACTOR() );
+                
+                anchorPointInPixels_ = ccp( contentSizeInPixels_.width * anchorPoint_.x, contentSizeInPixels_.height * anchorPoint_.y );
+                isTransformDirty_ = isInverseDirty_ = YES;
+#if CC_NODE_TRANSFORM_USING_AFFINE_MATRIX
+                isTransformGLDirty_ = YES;
+#endif          
+        }
+}
+
+- (CGRect) boundingBox
+{
+        CGRect ret = [self boundingBoxInPixels];
+        return CC_RECT_PIXELS_TO_POINTS( ret );
+}
+
+- (CGRect) boundingBoxInPixels
+{
+        CGRect rect = CGRectMake(0, 0, contentSizeInPixels_.width, contentSizeInPixels_.height);
+        return CGRectApplyAffineTransform(rect, [self nodeToParentTransform]);
+}
+
+-(void) setVertexZ:(float)vertexZ
+{
+        vertexZ_ = vertexZ * CC_CONTENT_SCALE_FACTOR();
+}
+
+-(float) scale
+{
+        NSAssert( scaleX_ == scaleY_, @"CCNode#scale. ScaleX != ScaleY. Don't know which one to return");
+        return scaleX_;
+}
+
+-(void) setScale:(float) s
+{
+        scaleX_ = scaleY_ = s;
+        isTransformDirty_ = isInverseDirty_ = YES;
+#if CC_NODE_TRANSFORM_USING_AFFINE_MATRIX
+        isTransformGLDirty_ = YES;
+#endif  
+}
+
+#pragma mark CCNode - Init & cleanup
+
++(id) node
+{
+        return [[[self alloc] init] autorelease];
+}
+
+-(id) init
+{
+        if ((self=[super init]) ) {
+                
+                isRunning_ = NO;
+                
+                skewX_ = skewY_ = 0.0f;
+                rotation_ = 0.0f;
+                scaleX_ = scaleY_ = 1.0f;
+                positionInPixels_ = position_ = CGPointZero;
+                anchorPointInPixels_ = anchorPoint_ = CGPointZero;
+                contentSizeInPixels_ = contentSize_ = CGSizeZero;
+                
+                
+                // "whole screen" objects. like Scenes and Layers, should set isRelativeAnchorPoint to NO
+                isRelativeAnchorPoint_ = YES; 
+                
+                isTransformDirty_ = isInverseDirty_ = YES;
+#if CC_NODE_TRANSFORM_USING_AFFINE_MATRIX
+                isTransformGLDirty_ = YES;
+#endif
+                
+                vertexZ_ = 0;
+                
+                grid_ = nil;
+                
+                visible_ = YES;
+                
+                tag_ = kCCNodeTagInvalid;
+                
+                zOrder_ = 0;
+                
+                // lazy alloc
+                camera_ = nil;
+                
+                // children (lazy allocs)
+                children_ = nil;
+                
+                // userData is always inited as nil
+                userData_ = nil;
+
+                //initialize parent to nil
+                parent_ = nil;
+        }
+        
+        return self;
+}
+
+- (void)cleanup
+{
+        // actions
+        [self stopAllActions];
+        [self unscheduleAllSelectors];
+        
+        // timers
+        [children_ makeObjectsPerformSelector:@selector(cleanup)];
+}
+
+- (NSString*) description
+{
+        return [NSString stringWithFormat:@"<%@ = %08X | Tag = %i>", [self class], self, tag_];
+}
+
+- (void) dealloc
+{
+        CCLOGINFO( @"cocos2d: deallocing %@", self);
+        
+        // attributes
+        [camera_ release];
+        
+        [grid_ release];
+        
+        // children
+        CCNode *child;
+        CCARRAY_FOREACH(children_, child)
+                child.parent = nil;
+        
+        [children_ release];
+        
+        [super dealloc];
+}
+
+#pragma mark CCNode Composition
+
+-(void) childrenAlloc
+{
+        children_ = [[CCArray alloc] initWithCapacity:4];
+}
+
+// camera: lazy alloc
+-(CCCamera*) camera
+{
+        if( ! camera_ ) {
+                camera_ = [[CCCamera alloc] init];
+                
+                // by default, center camera at the Sprite's anchor point
+                //              [camera_ setCenterX:anchorPointInPixels_.x centerY:anchorPointInPixels_.y centerZ:0];
+                //              [camera_ setEyeX:anchorPointInPixels_.x eyeY:anchorPointInPixels_.y eyeZ:1];
+                
+                //              [camera_ setCenterX:0 centerY:0 centerZ:0];
+                //              [camera_ setEyeX:0 eyeY:0 eyeZ:1];
+                
+        }
+        
+        return camera_;
+}
+
+-(CCNode*) getChildByTag:(NSInteger) aTag
+{
+        NSAssert( aTag != kCCNodeTagInvalid, @"Invalid tag");
+        
+        CCNode *node;
+        CCARRAY_FOREACH(children_, node){
+                if( node.tag == aTag )
+                        return node;
+        }
+        // not found
+        return nil;
+}
+
+/* "add" logic MUST only be on this method
+ * If a class want's to extend the 'addChild' behaviour it only needs
+ * to override this method
+ */
+-(void) addChild: (CCNode*) child z:(NSInteger)z tag:(NSInteger) aTag
+{       
+        NSAssert( child != nil, @"Argument must be non-nil");
+        NSAssert( child.parent == nil, @"child already added. It can't be added again");
+        
+        if( ! children_ )
+                [self childrenAlloc];
+        
+        [self insertChild:child z:z];
+        
+        child.tag = aTag;
+        
+        [child setParent: self];
+        
+        if( isRunning_ ) {
+                [child onEnter];
+                [child onEnterTransitionDidFinish];
+        }
+}
+
+-(void) addChild: (CCNode*) child z:(NSInteger)z
+{
+        NSAssert( child != nil, @"Argument must be non-nil");
+        [self addChild:child z:z tag:child.tag];
+}
+
+-(void) addChild: (CCNode*) child
+{
+        NSAssert( child != nil, @"Argument must be non-nil");
+        [self addChild:child z:child.zOrder tag:child.tag];
+}
+
+-(void) removeFromParentAndCleanup:(BOOL)cleanup
+{
+        [parent_ removeChild:self cleanup:cleanup];
+}
+
+/* "remove" logic MUST only be on this method
+ * If a class want's to extend the 'removeChild' behavior it only needs
+ * to override this method
+ */
+-(void) removeChild: (CCNode*)child cleanup:(BOOL)cleanup
+{
+        // explicit nil handling
+        if (child == nil)
+                return;
+        
+        if ( [children_ containsObject:child] )
+                [self detachChild:child cleanup:cleanup];
+}
+
+-(void) removeChildByTag:(NSInteger)aTag cleanup:(BOOL)cleanup
+{
+        NSAssert( aTag != kCCNodeTagInvalid, @"Invalid tag");
+        
+        CCNode *child = [self getChildByTag:aTag];
+        
+        if (child == nil)
+                CCLOG(@"cocos2d: removeChildByTag: child not found!");
+        else
+                [self removeChild:child cleanup:cleanup];
+}
+
+-(void) removeAllChildrenWithCleanup:(BOOL)cleanup
+{
+        // not using detachChild improves speed here
+        CCNode *c;
+        CCARRAY_FOREACH(children_, c)
+        {
+                // IMPORTANT:
+                //  -1st do onExit
+                //  -2nd cleanup
+                if (isRunning_)
+                        [c onExit];
+                
+                if (cleanup)
+                        [c cleanup];
+                
+                // set parent nil at the end (issue #476)
+                [c setParent:nil];
+        }
+        
+        [children_ removeAllObjects];
+}
+
+-(void) detachChild:(CCNode *)child cleanup:(BOOL)doCleanup
+{
+        // IMPORTANT:
+        //  -1st do onExit
+        //  -2nd cleanup
+        if (isRunning_)
+                [child onExit];
+        
+        // If you don't do cleanup, the child's actions will not get removed and the
+        // its scheduledSelectors_ dict will not get released!
+        if (doCleanup)
+                [child cleanup];
+        
+        // set parent nil at the end (issue #476)
+        [child setParent:nil];
+        
+        [children_ removeObject:child];
+}
+
+// used internally to alter the zOrder variable. DON'T call this method manually
+-(void) _setZOrder:(NSInteger) z
+{
+        zOrder_ = z;
+}
+
+// helper used by reorderChild & add
+-(void) insertChild:(CCNode*)child z:(NSInteger)z
+{
+        NSUInteger index=0;
+        CCNode *a = [children_ lastObject];
+        
+        // quick comparison to improve performance
+        if (!a || a.zOrder <= z)
+                [children_ addObject:child];
+        
+        else
+        {
+                CCARRAY_FOREACH(children_, a) {
+                        if ( a.zOrder > z ) {
+                                [children_ insertObject:child atIndex:index];
+                                break;
+                        }
+                        index++;
+                }
+        }
+        
+        [child _setZOrder:z];
+}
+
+-(void) reorderChild:(CCNode*) child z:(NSInteger)z
+{
+        NSAssert( child != nil, @"Child must be non-nil");
+        
+        [child retain];
+        [children_ removeObject:child];
+        
+        [self insertChild:child z:z];
+        
+        [child release];
+}
+
+#pragma mark CCNode Draw
+
+-(void) draw
+{
+        // override me
+        // Only use this function to draw your staff.
+        // DON'T draw your stuff outside this method
+}
+
+-(void) visit
+{
+        // quick return if not visible
+        if (!visible_)
+                return;
+        
+        glPushMatrix();
+        
+        if ( grid_ && grid_.active) {
+                [grid_ beforeDraw];
+                [self transformAncestors];
+        }
+
+        [self transform];
+        
+        if(children_) {
+                ccArray *arrayData = children_->data;
+                NSUInteger i = 0;
+                
+                // draw children zOrder < 0
+                for( ; i < arrayData->num; i++ ) {
+                        CCNode *child = arrayData->arr[i];
+                        if ( [child zOrder] < 0 )
+                                [child visit];
+                        else
+                                break;
+                }
+                
+                // self draw
+                [self draw];
+                
+                // draw children zOrder >= 0
+                for( ; i < arrayData->num; i++ ) {
+                        CCNode *child =  arrayData->arr[i];
+                        [child visit];
+                }
+
+        } else
+                [self draw];
+        
+        if ( grid_ && grid_.active)
+                [grid_ afterDraw:self];
+        
+        glPopMatrix();
+}
+
+#pragma mark CCNode - Transformations
+
+-(void) transformAncestors
+{
+        if( parent_ ) {
+                [parent_ transformAncestors];
+                [parent_ transform];
+        }
+}
+
+-(void) transform
+{       
+        // transformations
+        
+#if CC_NODE_TRANSFORM_USING_AFFINE_MATRIX
+        // BEGIN alternative -- using cached transform
+        //
+        if( isTransformGLDirty_ ) {
+                CGAffineTransform t = [self nodeToParentTransform];
+                CGAffineToGL(&t, transformGL_);
+                isTransformGLDirty_ = NO;
+        }
+        
+        glMultMatrixf(transformGL_);
+        if( vertexZ_ )
+                glTranslatef(0, 0, vertexZ_);
+        
+        // XXX: Expensive calls. Camera should be integrated into the cached affine matrix
+        if ( camera_ && !(grid_ && grid_.active) )
+        {
+                BOOL translate = (anchorPointInPixels_.x != 0.0f || anchorPointInPixels_.y != 0.0f);
+                
+                if( translate )
+                        ccglTranslate(RENDER_IN_SUBPIXEL(anchorPointInPixels_.x), RENDER_IN_SUBPIXEL(anchorPointInPixels_.y), 0);
+                
+                [camera_ locate];
+                
+                if( translate )
+                        ccglTranslate(RENDER_IN_SUBPIXEL(-anchorPointInPixels_.x), RENDER_IN_SUBPIXEL(-anchorPointInPixels_.y), 0);
+        }
+        
+        
+        // END alternative
+        
+#else
+        // BEGIN original implementation
+        // 
+        // translate
+        if ( isRelativeAnchorPoint_ && (anchorPointInPixels_.x != 0 || anchorPointInPixels_.y != 0 ) )
+                glTranslatef( RENDER_IN_SUBPIXEL(-anchorPointInPixels_.x), RENDER_IN_SUBPIXEL(-anchorPointInPixels_.y), 0);
+        
+        if (anchorPointInPixels_.x != 0 || anchorPointInPixels_.y != 0)
+                glTranslatef( RENDER_IN_SUBPIXEL(positionInPixels_.x + anchorPointInPixels_.x), RENDER_IN_SUBPIXEL(positionInPixels_.y + anchorPointInPixels_.y), vertexZ_);
+        else if ( positionInPixels_.x !=0 || positionInPixels_.y !=0 || vertexZ_ != 0)
+                glTranslatef( RENDER_IN_SUBPIXEL(positionInPixels_.x), RENDER_IN_SUBPIXEL(positionInPixels_.y), vertexZ_ );
+        
+        // rotate
+        if (rotation_ != 0.0f )
+                glRotatef( -rotation_, 0.0f, 0.0f, 1.0f );
+        
+        // skew
+        if ( (skewX_ != 0.0f) || (skewY_ != 0.0f) ) {
+                CGAffineTransform skewMatrix = CGAffineTransformMake( 1.0f, tanf(CC_DEGREES_TO_RADIANS(skewY_)), tanf(CC_DEGREES_TO_RADIANS(skewX_)), 1.0f, 0.0f, 0.0f );
+                GLfloat glMatrix[16];
+                CGAffineToGL(&skewMatrix, glMatrix);                                                                                                                     
+                glMultMatrixf(glMatrix);
+        }
+        
+        // scale
+        if (scaleX_ != 1.0f || scaleY_ != 1.0f)
+                glScalef( scaleX_, scaleY_, 1.0f );
+        
+        if ( camera_ && !(grid_ && grid_.active) )
+                [camera_ locate];
+        
+        // restore and re-position point
+        if (anchorPointInPixels_.x != 0.0f || anchorPointInPixels_.y != 0.0f)
+                glTranslatef(RENDER_IN_SUBPIXEL(-anchorPointInPixels_.x), RENDER_IN_SUBPIXEL(-anchorPointInPixels_.y), 0);
+        
+        //
+        // END original implementation
+#endif
+        
+}
+
+#pragma mark CCNode SceneManagement
+
+-(void) onEnter
+{
+        [children_ makeObjectsPerformSelector:@selector(onEnter)];      
+        [self resumeSchedulerAndActions];
+        
+        isRunning_ = YES;
+}
+
+-(void) onEnterTransitionDidFinish
+{
+        [children_ makeObjectsPerformSelector:@selector(onEnterTransitionDidFinish)];
+}
+
+-(void) onExit
+{
+        [self pauseSchedulerAndActions];
+        isRunning_ = NO;        
+        
+        [children_ makeObjectsPerformSelector:@selector(onExit)];
+}
+
+#pragma mark CCNode Actions
+
+-(CCAction*) runAction:(CCAction*) action
+{
+        NSAssert( action != nil, @"Argument must be non-nil");
+        
+        [[CCActionManager sharedManager] addAction:action target:self paused:!isRunning_];
+        return action;
+}
+
+-(void) stopAllActions
+{
+        [[CCActionManager sharedManager] removeAllActionsFromTarget:self];
+}
+
+-(void) stopAction: (CCAction*) action
+{
+        [[CCActionManager sharedManager] removeAction:action];
+}
+
+-(void) stopActionByTag:(NSInteger)aTag
+{
+        NSAssert( aTag != kCCActionTagInvalid, @"Invalid tag");
+        [[CCActionManager sharedManager] removeActionByTag:aTag target:self];
+}
+
+-(CCAction*) getActionByTag:(NSInteger) aTag
+{
+        NSAssert( aTag != kCCActionTagInvalid, @"Invalid tag");
+        return [[CCActionManager sharedManager] getActionByTag:aTag target:self];
+}
+
+-(NSUInteger) numberOfRunningActions
+{
+        return [[CCActionManager sharedManager] numberOfRunningActionsInTarget:self];
+}
+
+#pragma mark CCNode - Scheduler
+
+-(void) scheduleUpdate
+{
+        [self scheduleUpdateWithPriority:0];
+}
+
+-(void) scheduleUpdateWithPriority:(NSInteger)priority
+{
+        [[CCScheduler sharedScheduler] scheduleUpdateForTarget:self priority:priority paused:!isRunning_];
+}
+
+-(void) unscheduleUpdate
+{
+        [[CCScheduler sharedScheduler] unscheduleUpdateForTarget:self];
+}
+
+-(void) schedule:(SEL)selector
+{
+        [self schedule:selector interval:0];
+}
+
+-(void) schedule:(SEL)selector interval:(ccTime)interval
+{
+        NSAssert( selector != nil, @"Argument must be non-nil");
+        NSAssert( interval >=0, @"Arguemnt must be positive");
+        
+        [[CCScheduler sharedScheduler] scheduleSelector:selector forTarget:self interval:interval paused:!isRunning_];
+}
+
+-(void) unschedule:(SEL)selector
+{
+        // explicit nil handling
+        if (selector == nil)
+                return;
+        
+        [[CCScheduler sharedScheduler] unscheduleSelector:selector forTarget:self];
+}
+
+-(void) unscheduleAllSelectors
+{
+        [[CCScheduler sharedScheduler] unscheduleAllSelectorsForTarget:self];
+}
+- (void) resumeSchedulerAndActions
+{
+        [[CCScheduler sharedScheduler] resumeTarget:self];
+        [[CCActionManager sharedManager] resumeTarget:self];
+}
+
+- (void) pauseSchedulerAndActions
+{
+        [[CCScheduler sharedScheduler] pauseTarget:self];
+        [[CCActionManager sharedManager] pauseTarget:self];
+}
+
+#pragma mark CCNode Transform
+
+- (CGAffineTransform)nodeToParentTransform
+{
+        if ( isTransformDirty_ ) {
+                
+                transform_ = CGAffineTransformIdentity;
+                
+                if ( !isRelativeAnchorPoint_ && !CGPointEqualToPoint(anchorPointInPixels_, CGPointZero) )
+                        transform_ = CGAffineTransformTranslate(transform_, anchorPointInPixels_.x, anchorPointInPixels_.y);
+
+                if( ! CGPointEqualToPoint(positionInPixels_, CGPointZero) )
+                        transform_ = CGAffineTransformTranslate(transform_, positionInPixels_.x, positionInPixels_.y);
+                
+                if( rotation_ != 0 )
+                        transform_ = CGAffineTransformRotate(transform_, -CC_DEGREES_TO_RADIANS(rotation_));
+                
+                if( skewX_ != 0 || skewY_ != 0 ) {
+                        // create a skewed coordinate system
+                        CGAffineTransform skew = CGAffineTransformMake(1.0f, tanf(CC_DEGREES_TO_RADIANS(skewY_)), tanf(CC_DEGREES_TO_RADIANS(skewX_)), 1.0f, 0.0f, 0.0f);
+                        // apply the skew to the transform
+                        transform_ = CGAffineTransformConcat(skew, transform_);
+                }
+                
+                if( ! (scaleX_ == 1 && scaleY_ == 1) ) 
+                        transform_ = CGAffineTransformScale(transform_, scaleX_, scaleY_);
+                
+                if( ! CGPointEqualToPoint(anchorPointInPixels_, CGPointZero) )
+                        transform_ = CGAffineTransformTranslate(transform_, -anchorPointInPixels_.x, -anchorPointInPixels_.y);
+                                
+                isTransformDirty_ = NO;
+        }
+        
+        return transform_;
+}
+
+- (CGAffineTransform)parentToNodeTransform
+{
+        if ( isInverseDirty_ ) {
+                inverse_ = CGAffineTransformInvert([self nodeToParentTransform]);
+                isInverseDirty_ = NO;
+        }
+        
+        return inverse_;
+}
+
+- (CGAffineTransform)nodeToWorldTransform
+{
+        CGAffineTransform t = [self nodeToParentTransform];
+        
+        for (CCNode *p = parent_; p != nil; p = p.parent)
+                t = CGAffineTransformConcat(t, [p nodeToParentTransform]);
+        
+        return t;
+}
+
+- (CGAffineTransform)worldToNodeTransform
+{
+        return CGAffineTransformInvert([self nodeToWorldTransform]);
+}
+
+- (CGPoint)convertToNodeSpace:(CGPoint)worldPoint
+{
+        CGPoint ret;
+        if( CC_CONTENT_SCALE_FACTOR() == 1 )
+                ret = CGPointApplyAffineTransform(worldPoint, [self worldToNodeTransform]);
+        else {
+                ret = ccpMult( worldPoint, CC_CONTENT_SCALE_FACTOR() );
+                ret = CGPointApplyAffineTransform(ret, [self worldToNodeTransform]);
+                ret = ccpMult( ret, 1/CC_CONTENT_SCALE_FACTOR() );
+        }
+        
+        return ret;
+}
+
+- (CGPoint)convertToWorldSpace:(CGPoint)nodePoint
+{
+        CGPoint ret;
+        if( CC_CONTENT_SCALE_FACTOR() == 1 )
+                ret = CGPointApplyAffineTransform(nodePoint, [self nodeToWorldTransform]);
+        else {
+                ret = ccpMult( nodePoint, CC_CONTENT_SCALE_FACTOR() );
+                ret = CGPointApplyAffineTransform(ret, [self nodeToWorldTransform]);
+                ret = ccpMult( ret, 1/CC_CONTENT_SCALE_FACTOR() );
+        }
+        
+        return ret;
+}
+
+- (CGPoint)convertToNodeSpaceAR:(CGPoint)worldPoint
+{
+        CGPoint nodePoint = [self convertToNodeSpace:worldPoint];
+        CGPoint anchorInPoints;
+        if( CC_CONTENT_SCALE_FACTOR() == 1 )
+                anchorInPoints = anchorPointInPixels_;
+        else
+                anchorInPoints = ccpMult( anchorPointInPixels_, 1/CC_CONTENT_SCALE_FACTOR() );
+           
+        return ccpSub(nodePoint, anchorInPoints);
+}
+
+- (CGPoint)convertToWorldSpaceAR:(CGPoint)nodePoint
+{
+        CGPoint anchorInPoints;
+        if( CC_CONTENT_SCALE_FACTOR() == 1 )
+                anchorInPoints = anchorPointInPixels_;
+        else
+                anchorInPoints = ccpMult( anchorPointInPixels_, 1/CC_CONTENT_SCALE_FACTOR() );
+        
+        nodePoint = ccpAdd(nodePoint, anchorInPoints);
+        return [self convertToWorldSpace:nodePoint];
+}
+
+- (CGPoint)convertToWindowSpace:(CGPoint)nodePoint
+{
+    CGPoint worldPoint = [self convertToWorldSpace:nodePoint];
+        return [[CCDirector sharedDirector] convertToUI:worldPoint];
+}
+
+// convenience methods which take a UITouch instead of CGPoint
+
+#ifdef __IPHONE_OS_VERSION_MAX_ALLOWED
+
+- (CGPoint)convertTouchToNodeSpace:(UITouch *)touch
+{
+        CGPoint point = [touch locationInView: [touch view]];
+        point = [[CCDirector sharedDirector] convertToGL: point];
+        return [self convertToNodeSpace:point];
+}
+
+- (CGPoint)convertTouchToNodeSpaceAR:(UITouch *)touch
+{
+        CGPoint point = [touch locationInView: [touch view]];
+        point = [[CCDirector sharedDirector] convertToGL: point];
+        return [self convertToNodeSpaceAR:point];
+}
+
+#endif // __IPHONE_OS_VERSION_MAX_ALLOWED
+
+
+@end