10 #import "SDL_uikitappdelegate.h"

    12 #import "SDL_mouse.h"

    13 #import "CGPointUtils.h"

   100 #pragma mark -

   101 #pragma mark Custom SDL_UIView input handling

   102 #define kMinimumPinchDelta      50

   103 #define kMinimumGestureLength	10

   104 #define kMaximumVariance        3

   105 

   106 // we override default touch input to implement our own gestures

   107 -(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

   108 	NSArray *twoTouches;

   109 	UITouch *touch = [touches anyObject];

   110 	

   111 	switch ([touches count]) {

   112 		case 1:

   113 			gestureStartPoint = [touch locationInView:self.view];

   114 			initialDistanceForPinching = 0;

   115 			switch ([touch tapCount]) {

   116 				case 1:

   117 					NSLog(@"X:%d Y:%d", (int)gestureStartPoint.x, (int)gestureStartPoint.y );

   118 					SDL_WarpMouseInWindow([SDLUIKitDelegate sharedAppDelegate].window, 

   119 							      (int)gestureStartPoint.y, 320 - (int)gestureStartPoint.x);

   120 					HW_click();

   121 					break;

   122 				case 2:

   123 					HW_ammoMenu();

   124 					break;

   125 				default:

   126 					break;

   127 			}

   128 			break;

   129 		case 2:

   130 			if (2 == [touch tapCount]) {

   131 				HW_zoomReset();

   132 			}

   133 			

   134 			// pinching

   135 			twoTouches = [touches allObjects];

   136 			UITouch *first = [twoTouches objectAtIndex:0];

   137 			UITouch *second = [twoTouches objectAtIndex:1];

   138 			initialDistanceForPinching = distanceBetweenPoints([first locationInView:self.view], [second locationInView:self.view]);

   139 			break;

   140 		default:

   141 			break;

   142 	}

   143 

   144 }

   145 

   146 -(void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {

   147 	initialDistanceForPinching = 0;

   148 	gestureStartPoint.x = 0;

   149 	gestureStartPoint.y = 0;

   150 	HW_allKeysUp();

   151 }

   152 

   153 -(void) touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {

   154 	// this can happen if the user puts more than 5 touches on the screen at once, or perhaps in other circumstances.

   155 	// Usually (it seems) all active touches are canceled.

   156 	[self touchesEnded:touches withEvent:event];

   157 }

   158 

   159 -(void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {

   160 	NSArray *twoTouches;

   161 	CGPoint currentPosition;

   162 	UITouch *touch = [touches anyObject];

   163 

   164 	switch ([touches count]) {

   165 		case 1:

   166 			currentPosition = [touch locationInView:self.view];

   167 			// panning

   168 			SDL_WarpMouseInWindow([SDLUIKitDelegate sharedAppDelegate].window, 

   169 							(int)gestureStartPoint.y, 320 - (int)gestureStartPoint.x);

   170 			// remember that we have x and y inverted

   171 			/* temporarily disabling hog movements for camera panning testing

   172 			CGFloat vertDiff = gestureStartPoint.x - currentPosition.x;

   173 			CGFloat horizDiff = gestureStartPoint.y - currentPosition.y;

   174 			CGFloat deltaX = fabsf(vertDiff);

   175 			CGFloat deltaY = fabsf(horizDiff);

   176 			

   177 			if (deltaY >= kMinimumGestureLength && deltaX <= kMaximumVariance) {

   178 				NSLog(@"Horizontal swipe detected, begX:%f curX:%f", gestureStartPoint.x, currentPosition.x);

   179 				if (horizDiff > 0) HW_walkLeft();

   180 				else HW_walkRight();

   181 			} else if (deltaX >= kMinimumGestureLength && deltaY <= kMaximumVariance){

   182 				NSLog(@"Vertical swipe detected, begY:%f curY:%f", gestureStartPoint.y, currentPosition.y);

   183 				if (vertDiff < 0) HW_aimUp();

   184 				else HW_aimDown();

   185 			}

   186 			*/

   187 			break;

   188 		case 2:

   189 			twoTouches = [touches allObjects];

   190 			UITouch *first = [twoTouches objectAtIndex:0];

   191 			UITouch *second = [twoTouches objectAtIndex:1];

   192 			CGFloat currentDistanceOfPinching = distanceBetweenPoints([first locationInView:self.view], [second locationInView:self.view]);

   193 			

   194 			if (0 == initialDistanceForPinching) 

   195 				initialDistanceForPinching = currentDistanceOfPinching;

   196 

   197 			if (currentDistanceOfPinching < initialDistanceForPinching + kMinimumPinchDelta)

   198 				HW_zoomOut();

   199 			else if (currentDistanceOfPinching > initialDistanceForPinching + kMinimumPinchDelta)

   200 				HW_zoomIn();

   201 

   202 			currentDistanceOfPinching = initialDistanceForPinching;

   203 			break;

   204 		default:

   205 			break;

   206 	}

   207 }

   208 

   209