CCSpriteMultiTouch added

Extensions/CCSpriteMultiTouch/CCSpriteMultiTouch.h

@@ -0,0 +1,52 @@
+/*
+ * cocos2d for iPhone: http://www.cocos2d-iphone.org
+ *
+ * Copyright (c) 2008-2010 Ricardo Quesada
+ * Copyright (c) 2011 Zynga Inc.
+ * 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 <Foundation/Foundation.h>
+#import "cocos2d.h"
+
+//----------------------------------------------------------------------
+
+@interface CCSpriteMultiTouch : CCSprite
+
+//----------------------------------------------------------------------
+
+@property (nonatomic, readonly) NSUInteger touchCount;                  // number of active touches in sprite
+
+// defines how many touches it takes to activate drag, scale or rotate
+// 0 (zero) disables the functionality, and is default
+@property (nonatomic) NSUInteger touchCountForDrag;
+@property (nonatomic) NSUInteger touchCountForScale;
+@property (nonatomic) NSUInteger touchCountForRotate;
+
+//----------------------------------------------------------------------
+
+- (void)touchDrag;
+- (void)touchScale;
+- (void)touchRotate;
+
+//----------------------------------------------------------------------
+
+@end

Extensions/CCSpriteMultiTouch/CCSpriteMultiTouch.m

@@ -0,0 +1,204 @@
+/*
+ * cocos2d for iPhone: http://www.cocos2d-iphone.org
+ *
+ * Copyright (c) 2008-2010 Ricardo Quesada
+ * Copyright (c) 2011 Zynga Inc.
+ * 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 "CCSpriteMultiTouch.h"
+
+//----------------------------------------------------------------------
+
+#define CCSpriteMultiTouchMaxTouches 3
+#define CCSpriteMultiTouchFuntionDisable 0
+
+//----------------------------------------------------------------------
+
+@implementation CCSpriteMultiTouch
+{
+    // must be weak, to avoid retaining touches
+    __weak UITouch *_touch[CCSpriteMultiTouchMaxTouches];
+    // variables used internally to
+    CGPoint _dragCentre;
+    CGPoint _scaleCentre;
+    float _scaleStartDistance;
+    float _scaleStartScale;
+    CGPoint _rotationCentre;
+    float _rotationLast;
+}
+
+//----------------------------------------------------------------------
+
+- (instancetype)init
+{
+    self = [super init];
+    // initialize
+    _touchCountForDrag = CCSpriteMultiTouchFuntionDisable;
+    _touchCountForScale = CCSpriteMultiTouchFuntionDisable;
+    _touchCountForRotate = CCSpriteMultiTouchFuntionDisable;
+    _touchCount = 0;
+    // done
+    return(self);
+}
+
+//----------------------------------------------------------------------
+// helper functions
+
+// calculates the centre of all current touches
+- (CGPoint)centre
+{
+    CGPoint sum = CGPointZero;
+
+    for (int index = 0; index < _touchCount; index ++)
+    {
+        CGPoint pos = [_touch[index] locationInView:[CCDirector sharedDirector].view];
+        pos = [[CCDirector sharedDirector] convertToGL:pos];
+        sum = ccpAdd(sum, pos);
+    }
+    return(ccpMult(sum, 1.0f / (float)_touchCount));
+}
+
+// calculates the average distance of oll touches from touch centre
+- (float)distance:(CGPoint)centre
+{
+    float sum = 0;
+    for (int index = 0; index < _touchCount; index ++)
+    {
+        CGPoint pos = [_touch[index] locationInView:[CCDirector sharedDirector].view];
+        pos = [[CCDirector sharedDirector] convertToGL:pos];
+        sum = sum + ccpDistance(centre, pos);
+    }
+    return(sum / (float)_touchCount);
+}
+
+// calculates the average rotation of all touches, relative to touch centre
+- (float)rotation:(CGPoint)centre
+{
+    float sum = 0;
+    for (int index = 0; index < _touchCount; index ++)
+    {
+        CGPoint pos = [_touch[index] locationInView:[CCDirector sharedDirector].view];
+        pos = [[CCDirector sharedDirector] convertToGL:pos];
+        sum = sum + ccpToAngle(ccpSub(pos, centre));
+    }
+    return(sum / (float)_touchCount);
+}
+
+//----------------------------------------------------------------------
+
+- (void)touchBegan:(UITouch *)touch withEvent:(UIEvent *)event
+{
+    // if max touches exceeded, drop the touch
+    if (_touchCount == CCSpriteMultiTouchMaxTouches)
+    {
+        [super touchBegan:touch withEvent:event];
+        return;
+    }
+
+    // add the touch to the list
+    _touch[_touchCount] = touch;
+    _touchCount ++;
+    CCLOG(@"touches : %d", (int)_touchCount);
+
+    // check if drag function activates
+    if (_touchCount == _touchCountForDrag) _dragCentre = [self centre];
+
+    // check for scale function
+    if (_touchCount == _touchCountForScale)
+    {
+        _scaleCentre = [self centre];
+        _scaleStartDistance = [self distance:_scaleCentre];
+        _scaleStartScale = self.scale;
+    }
+
+    // check for rotate function
+    if (_touchCount == _touchCountForRotate)
+    {
+        _rotationCentre = [self centre];
+        _rotationLast = [self rotation:_rotationCentre];
+    }
+}
+
+//----------------------------------------------------------------------
+
+- (void)touchMoved:(UITouch *)touch withEvent:(UIEvent *)event
+{
+    // check for dragging
+    if (_touchCount == _touchCountForDrag) [self touchDrag];
+
+    // check for scaling
+    if (_touchCount == _touchCountForScale) [self touchScale];
+
+    // check for rotation
+    if (_touchCount == _touchCountForRotate) [self touchRotate];
+}
+
+//----------------------------------------------------------------------
+
+- (void)touchEnded:(UITouch *)touch withEvent:(UIEvent *)event
+{
+    // remove the touch from the list
+    for (int index = 0; index < _touchCount; index ++)
+    {
+        if (_touch[index] == touch)
+        {
+            _touch[index] = _touch[_touchCount - 1];
+            _touchCount --;
+            return;
+        }
+    }
+}
+
+//----------------------------------------------------------------------
+
+- (void)touchDrag
+{
+    // OBS !!
+    // dragging (for now) only supports defualt positioning
+    CGPoint pos = [self centre];
+    CGPoint movement = ccpSub(pos, _dragCentre);
+    self.position = ccpAdd(self.position, movement);
+    _dragCentre = pos;
+}
+
+//----------------------------------------------------------------------
+
+- (void)touchScale
+{
+    _scaleCentre = [self centre];
+    float distance = [self distance:_scaleCentre];
+    self.scale = _scaleStartScale * (distance / _scaleStartDistance);
+}
+
+//----------------------------------------------------------------------
+
+- (void)touchRotate
+{
+    _rotationCentre = [self centre];
+    float rotation = [self rotation:_rotationCentre];
+    self.rotation = self.rotation - 180.0f / M_PI * (rotation - _rotationLast);
+    _rotationLast = rotation;
+}
+
+//----------------------------------------------------------------------
+
+@end

Extensions/CCSpriteMultiTouch/README.md

@@ -0,0 +1,17 @@
+CCSpriteMultiTouch
+==================
+
+Type of class  : Descendant of CCSprite
+Uses extension : [NONE]
+
+A sprite, capable of handling multitouch. The sprite can calculate movement, rotation and scale.
+
+To enable drag, scale and rotation, set the properties touchCountForDrag, touchCountForScale and touchCountForRotate, to something different than zero. Override the methods touchDrag, touchScale and touchRotate, to perform custom operations.  
+
+Remember to set multitouchEnabled for the node, otherwise only first touch will be accepted.
+
+The #define CCSpriteMultiTouchMaxTouches, defines the maximum number of touches, accepted on the sprite (default 3)
+
+OBS!!
+=====  
+Dragging for now only supports CCPositionTypePoints

cocos2d-iphone-ext.xcodeproj/project.pbxproj

@@ -7,6 +7,9 @@
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+				0E21D30A198A484600E84AB1 /* CCSpriteMultiTouch.h */,
+				0E21D30B198A484600E84AB1 /* CCSpriteMultiTouch.m */,
+			);
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 				A6994F83194A2FAC00B97481 /* CCTransformationNodeTest.m */,
 				A6994F80194A2F3D00B97481 /* CCCropNodeTest.m */,
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