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lobster / code / ios / LobsterViewController.mm

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//
//  LobsterViewController.m
//  Lobster
//
//  Created by Yahor Tsirkoun on 3/25/11.
//  Copyright 2011 __MyCompanyName__. All rights reserved.
//

#import <QuartzCore/QuartzCore.h>

#import "LobsterViewController.h"
#import "EAGLView.h"
#import <sys/time.h>

@interface LobsterViewController ()
@property (nonatomic, retain) EAGLContext *context;
@property (nonatomic, assign) CADisplayLink *displayLink;
@end

@implementation LobsterViewController

@synthesize animating, context, displayLink;

// We need LobsterViewController to be a singleton to implement functions like lobster_time()
static LobsterViewController* instance = NULL;

+ (LobsterViewController*)sharedInstance
{	
	// instance is created via awakeFromNib() method, not by a first shaderInstance call
	return instance;	
}

// time in seconds since Unix epoch
double getUnixTime()
{
	timeval tv;
	gettimeofday(&tv, NULL);
	
	return tv.tv_sec + tv.tv_usec / 1000000.0;
}

// local time
tm getLocalTime()
{
	timeval tv;
	gettimeofday(&tv, NULL);
	
	// it's better to copy result of localtime cause pointer data will change on next localtime() call
	tm result;
	result = *(localtime(&tv.tv_sec));
	
	return result;
}

- (void)awakeFromNib
{
	lobster_log("LobsterViewController::awakeFromNib");
	
	// Save this instance to singleton
	instance = self;
    
    // Random seed
    srand(getLocalTime().tm_sec);
	
	// Create application, it will be initialized later
	application = createApplication();
	if (!application)
	{
		[self release];
		lobster_log("createApplication() returned NULL");
		return;
	}
	
    EAGLContext *aContext = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES1];
    
    if (!aContext)
        lobster_log("Failed to create ES context");
    else if (![EAGLContext setCurrentContext:aContext])
        lobster_log("Failed to set ES context current");
    
	self.context = aContext;
	[aContext release];

    [(EAGLView*)self.view setContext:context];
	application->screenFramebuffer = [(EAGLView*)self.view createFramebuffer];
    //[(EAGLView*)self.view setFramebuffer];
	[self maximize];
	
	if (!application->init())
	{
		lobster_log("Failed to initialize payload application");
		[self release];
	}
	
	mainScreenScale = 1.0f;
	if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)])
	{
		mainScreenScale = [[UIScreen mainScreen] scale];
	}
	
	GameCenter::getInstance().init();
    
    animating = FALSE;
    animationFrameInterval = 1;
    self.displayLink = nil;
	
	self->appBaseTime = 0.0;
	self->appMinimizeTime = 0.0;
}

- (void)dealloc
{
	lobster_log("LobsterViewController::dealloc");
	
    // Tear down context.
    if ([EAGLContext currentContext] == context)
        [EAGLContext setCurrentContext:nil];
    
    [context release];
    
    [super dealloc];
}

// Time in seconds from applicaton launch which pauses when application is inactve
- (double)applicationTime
{
	return getUnixTime() - self->appBaseTime;
}

- (BOOL)canBecomeFirstResponder 
{
	lobster_log("LobsterViewController::canBecomeFirstResponder");
	
	// to recieve motion events view must be a first responder
    return YES;
}

- (void)viewWillAppear:(BOOL)animated
{
	lobster_log("LobsterViewController::viewWillAppear");
	
    [self maximize];
    [self drawFrame];
    
    [super viewWillAppear:animated];
}

- (void)viewDidAppear:(BOOL)animated 
{
	lobster_log("LobsterViewController::viewDidAppear");
	
	self->activeTouches.clear();
	
	// view must become first responder to recieve motion events
    [self becomeFirstResponder];
}

- (void)viewWillDisappear:(BOOL)animated
{
	lobster_log("LobsterViewController::viewWillDisappear");
	
    [self minimize];
    
    [super viewWillDisappear:animated];
}

- (void)viewDidUnload
{
	lobster_log("LobsterViewController::viewDidUnload");
	
	[super viewDidUnload];

    // Tear down context.
    if ([EAGLContext currentContext] == context)
        [EAGLContext setCurrentContext:nil];
	
	[context release];	
}

- (NSInteger)animationFrameInterval
{
    return animationFrameInterval;
}

- (void)setAnimationFrameInterval:(NSInteger)frameInterval
{
    /*
	 Frame interval defines how many display frames must pass between each time the display link fires.
	 The display link will only fire 30 times a second when the frame internal is two on a display that refreshes 60 times a second. The default frame interval setting of one will fire 60 times a second when the display refreshes at 60 times a second. A frame interval setting of less than one results in undefined behavior.
	 */
    if (frameInterval >= 1)
    {
        animationFrameInterval = frameInterval;
        
        if (animating)
        {
            [self minimize];
            [self maximize];
        }
    }
}

- (void)maximize
{
	if (!animating)
	{
		self->appBaseTime += getUnixTime() - self->appMinimizeTime;
		application->maximize();
	
        CADisplayLink *aDisplayLink = [CADisplayLink displayLinkWithTarget:self selector:@selector(drawFrame)];
        [aDisplayLink setFrameInterval:animationFrameInterval];
        [aDisplayLink addToRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
        self.displayLink = aDisplayLink;
        
        animating = TRUE;
    }
}

- (void)minimize
{
	if (animating)
	{
		application->minimize();
		self->appMinimizeTime = getUnixTime();
	
        [self.displayLink invalidate];
        self.displayLink = nil;
        animating = FALSE;
    }
}

- (void)drawFrame
{
	static double currentTime = 0.0;
	static double previousTime = 0.0;
	
	if (!animating)
		return;
	
	// update by timer
	currentTime = lobster_time();
	application->timer(currentTime, currentTime - previousTime);
	previousTime = currentTime;
	
    [(EAGLView *)self.view setFramebuffer];
    
    application->render();
    
    [(EAGLView *)self.view presentFramebuffer];
}

- (void)didReceiveMemoryWarning
{
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];
    
    // Release any cached data, images, etc. that aren't in use.
}

/**
 * debugTouchesHandler
 *
 * debug method for debug printing info about touches
 * @param type of event. Must be 0 for touchesBegan, 1 - touchesMoved, 2 - touchesEnded
 * @param touches to handle
 * @param event for that touches
 */
- (void)debugTouchesHandler:(int)type withTouches:(NSSet*)touches withEvent:(UIEvent*)event
{
	touches = [event allTouches];
	
	static char* names[] = { "touchesBegan", "touchesMoved", "touchesEnded" };
	
	switch ([touches count])
	{
		case 0:
		{
			lobster_log("%s: {}\n", names[type]);
			break;
		}
		case 1:
		{
			lobster_log("%s: {%x}\n", names[type], [[touches allObjects] objectAtIndex:0]);
			break;
		}
		case 2:
		{
			lobster_log("%s: {%x, %x}\n", names[type], [[touches allObjects] objectAtIndex:0], [[touches allObjects] objectAtIndex:1]);
			break;
		}
		case 3:
		{
			lobster_log("%s: {%x, %x, %x}\n", names[type], [[touches allObjects] objectAtIndex:0], [[touches allObjects] objectAtIndex:1], [[touches allObjects] objectAtIndex:2]);
			break;
		}
		case 4:
		{
			lobster_log("%s: {%x, %x, %x, %x}\n", names[type], [[touches allObjects] objectAtIndex:0], [[touches allObjects] objectAtIndex:1], [[touches allObjects] objectAtIndex:2], [[touches allObjects] objectAtIndex:3]);
			break;
		}
		case 5:
		{
			lobster_log("%s: {%x, %x, %x, %x, %x}\n", names[type], [[touches allObjects] objectAtIndex:0], [[touches allObjects] objectAtIndex:1], [[touches allObjects] objectAtIndex:2], [[touches allObjects] objectAtIndex:3], [[touches allObjects] objectAtIndex:4]);
			break;
		}
	}
}

/**
 * touchesHandler
 *
 * debug method for debug printing info about touches
 * @param type of event. Must be 0 for touchesBegan, 1 - touchesMoved, 2 - touchesEnded
 * @param touches to handle
 * @param event for that touches
 */
- (void)touchesHandler:(int)type withTouches:(NSSet*)touches withEvent:(UIEvent*)event
{
	//[self debugTouchesHandler:type withTouches:touches withEvent:event];
	
	touches = [event allTouches];
	
	// End out dated touches
	for (std::map<UITouch*, Touch>::iterator it = activeTouches.begin(); it != activeTouches.end(); ++it)
	{
		if (it->second.id != -1 && ![touches containsObject:it->first])
		{
			//lobster_log("touchEnd: %d\n", it->second.id);
			application->touchEnd(it->second);
			it->second.id = -1;
		}
	}
	
	// Process active touches
	for (int i = 0; i < [touches count]; i++)
	{
		UITouch* uitouch = [[touches allObjects] objectAtIndex:i];
		CGPoint touchPoint = [uitouch locationInView:uitouch.view];
		
        touchPoint.x *= self->mainScreenScale;
		touchPoint.y *= self->mainScreenScale;
        
		//lobster_log("processing toch - %x\n", uitouch);
		
		if (activeTouches.find(uitouch) == activeTouches.end())
		{
			//lobster_log("new touch - %x\n", uitouch);
			Touch& touch = activeTouches[uitouch];
			touch.id = -1;
		}
		
		Touch& touch = activeTouches[uitouch];
		
		// Beginning of new touch
		if (touch.id == -1)
		{
			touch.id = touchCount++;
			
			touch.x = touch.beginX = touchPoint.x;
			touch.y = touch.beginY = touchPoint.y;
			
			//lobster_log("touchBegin: %d\n", touch.id);
			application->touchBegin(touch);
		}
        
        touch.x = touchPoint.x;
        touch.y = touchPoint.y;
		
		if (type != 2)
		{
			//lobster_log("touchMove: %d\n", touch.id);
			application->touchMove(touch);
		}
		else 
		{
			//lobster_log("touchEnd: %d\n", touch.id);
			application->touchEnd(touch);
			touch.id = -1;
		}
	}
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
	[self touchesHandler:0 withTouches:touches withEvent:event];
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
	[self touchesHandler:1 withTouches:touches withEvent:event];
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
	[self touchesHandler:2 withTouches:touches withEvent:event];
}

// motions
- (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent*)event
{
	lobster_log("LobsterViewController::motionBegan");
}

- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent*)event
{
	lobster_log("LobsterViewController::motionEnded");
	
	if (motion == UIEventSubtypeMotionShake)
	{
		lobster_log("LobsterViewController::shake");
		self->application->shake();
	}
}

- (void)motionCancelled:(UIEventSubtype)motion withEvent:(UIEvent*)event
{	
	lobster_log("LobsterViewController::motionCancelled");
}

// Called when GameCenter ends showing leaderboard
- (void)leaderboardViewControllerDidFinish:(GKLeaderboardViewController*)viewController
{
	[self dismissModalViewControllerAnimated:YES];
	lobster_log("leaderboardViewControllerDidFinish");
}

// Called when GameCenter ends showing achievements screen
- (void)achievementViewControllerDidFinish:(GKAchievementViewController*)viewController
{
    [self dismissModalViewControllerAnimated:YES];
	lobster_log("achievementViewControllerDidFinish");
}

- (void)alertView:(UIAlertView*)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
	lobster_log("alertView callback");
	activeTouches.clear();
}

@end