столкновение с движущимися объектами

Question

Я попытался написать столкновение с движущимися «поплавками», но не получилось. Что-то может быть в неправильном месте кода «столкновения»?

// 
// FruitsView.m 
// 

#import "FruitsView.h" 
#import "Constants.h" 
#import "Utilities.h" 

#define kFloat1Speed 0.15 
#define kFloat2Speed 0.3 
#define kFloat3Speed 0.2 

@interface FruitsView (Private) 
- (void) stopTimer; 
@end 

@implementation FruitsView 
@synthesize apple, float1, float2, float3, posFloat1, posFloat2, posFloat3; 


-(void)onTimer { 

float1.center = CGPointMake(float1.center.x+posFloat1.x,float1.cen ter.y+posFloat1.y); 

if(float1.center.x > 380 || float1.center.x < -60) 
posFloat1.x = -posFloat1.x; 
if(float1.center.y > 100 || float1.center.y < -40) 
posFloat1.y = -posFloat1.y; 

float2.center = CGPointMake(float2.center.x+posFloat2.x,float2.cen ter.y+posFloat2.y); 

if(float2.center.x > 380 || float2.center.x < -50) 
posFloat2.x = -posFloat2.x; 
if(float2.center.y > 150 || float2.center.y < -30) 
posFloat2.y = -posFloat2.y; 

float3.center = CGPointMake(float3.center.x+posFloat3.x,float3.cen ter.y+posFloat3.y); 

if(float3.center.x > 380 || float3.center.x < -70) 
posFloat3.x = -posFloat3.x; 
if(float3.center.y > 100 || float3.center.y < -20) 
posFloat3.y = -posFloat3.y; 


if(CGRectIntersectsRect(apple.frame,float1.frame)) { 
if(apple.center.y > float1.center.y) { 
posApple.y = -posApple.y; 
} 
} 

if(CGRectIntersectsRect(apple.frame,float2.frame)) { 
if(apple.center.y > float2.center.y) { 
posFloat2.y = -posFloat2.y; 
} 
} 

if(CGRectIntersectsRect(apple.frame,float3.frame)) { 
if(apple.center.y > float3.center.y) { 
posFloat3.y = -posFloat3.y; 
} 
} 
} 

#pragma mark Initialisation/destruction 

- (void)awakeFromNib { 

[NSTimer scheduledTimerWithTimeInterval:0.0001 target:self selector:@selector(onTimer) userInfo:nil repeats:YES]; 

posFloat1 = CGPointMake(kFloat1Speed, 0); 
posFloat2 = CGPointMake(kFloat2Speed, 0); 
posFloat3 = CGPointMake(kFloat3Speed, 0); 

timer = nil; 
modeLock = lockNotYetChosen; 

defaultSize = self.bounds.size.width; 

modal = self.tag; 

[[UIAccelerometer sharedAccelerometer] setDelegate:self]; 

[UIView beginAnimations:nil context:nil]; 
[UIView setAnimationRepeatCount:1]; 
eadbea.transform = CGAffineTransformMakeScale(0.5,0.5); 
[UIView commitAnimations]; 

[UIView beginAnimations:nil context:nil]; 
[UIView setAnimationRepeatCount:1]; 
apple.transform = CGAffineTransformMakeScale(0.5,0.5); 
[UIView commitAnimations]; 
} 

#pragma mark Background animation processing 

- (void) startTimer { 
if (!timer) { 
timer = [[NSTimer scheduledTimerWithTimeInterval:1.0/60.0 target:self selector:@selector(timerTick:) userInfo:nil repeats:YES] retain]; 
} 
} 


- (void) stopTimer { 
[timer invalidate]; 
[timer release]; 
timer = nil; 
} 

- (void) check:(CGPoint*)position delta:(CGSize*)delta halfSize:(CGSize)halfSize forBouncingAgainst:(CGSize)containerSize { 

if ((position->x - halfSize.width)<0) 
{ 
delta->width = fabsf(delta->width)*BOUNCE_DAMPING; 
position->x = halfSize.width; 
} 
if ((position->x + halfSize.width)>containerSize.width) 
{ 
delta->width = fabsf(delta->width)*-BOUNCE_DAMPING; 
position->x = containerSize.width - halfSize.width; 
} 
if ((position->y - halfSize.height)<0) 
{ 
delta->height = fabsf(delta->height)*BOUNCE_DAMPING; 
position->y = halfSize.height; 
} 
if ((position->y + halfSize.height)>containerSize.height) 
{ 
delta->height = fabsf(delta->height)*-BOUNCE_DAMPING; 
position->y = containerSize.height - halfSize.height; 
} 
} 


- (void) timerTick: (NSTimer*)timer { 

dragDelta = CGSizeScale(dragDelta, INERTIAL_DAMPING); 

if ((fabsf(dragDelta.width)>DELTA_ZERO_THRESHOLD) || (fabsf(dragDelta.height)>DELTA_ZERO_THRESHOLD)) 
{ 
CGPoint ctr = CGPointApplyDelta(self.center, dragDelta); 

CGSize halfSize = CGSizeMake(self.bounds.size.width/4, self.bounds.size.height/4); 
[self check:&ctr delta:&dragDelta halfSize:halfSize forBouncingAgainst:self.superview.bounds.size]; 

self.center = ctr; 
} 
else 
{ 
[self stopTimer]; 
} 
} 

#pragma mark Input Handling 

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { 
NSSet* allTouches = [event touchesForView:self]; 
if ([allTouches count]==1) 
{ 
if (modeLock>lockNotYetChosen) return; 

UITouch* anyTouch = [touches anyObject]; 
lastMove = anyTouch.timestamp; 
CGPoint now = [anyTouch locationInView: self.superview]; 
CGPoint then = [anyTouch previousLocationInView: self.superview]; 
dragDelta = CGPointDelta(now, then); 

self.center = CGPointApplyDelta(self.center, dragDelta); 
[self stopTimer]; 
} 
} 

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

NSSet* allTouches = [event touchesForView:self]; 
if ([touches count]==[allTouches count]) 
{ 
modeLock = lockNotYetChosen; 

if ((event.timestamp - lastMove) > MOVEMENT_PAUSE_THRESHOLD) 
return; 
if ((fabsf(dragDelta.width)>INERTIA_THRESHOLD) || (fabsf(dragDelta.height)>INERTIA_THRESHOLD)) 
{ 
[self startTimer]; 
} 
} 
} 

- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event { 
modeLock = lockNotYetChosen; 
[self stopTimer]; 
} 

- (void)dealloc 
{ 
[float1 release]; 
[float2 release]; 
[float3 release]; 
[apple release]; 
[bear_head release]; 
[self stopTimer]; 
[super dealloc]; 
} 

@end 

Answer 1

Вместо того, чтобы делать все поплавки, просто использовать два NSRect и проверить, если они пересекаются с помощью NSIntersectionRect(rectA, rectB). Тогда вы могли бы сделать что-то вроде if(!NSIsEmptyRect(NSIntersectionRect(playerRect, monsterRect))) gameOver();

Приветствий

Nik