I've been trying to prevent my sprite that is controlled by a UIPanGestureRecognizer from leaving the screen. I've tried creating this with this code but the player is still able to leave the screen.
-(id)initWithSize:(CGSize)size {
if (self = [super initWithSize:size]) {
self.physicsBody = [SKPhysicsBody bodyWithEdgeLoopFromRect:self.frame];
self.physicsBody.categoryBitMask = wallCategory;
player = [SKSpriteNode spriteNodeWithImageNamed:#"thePlayer.png"];
player.size = CGSizeMake(35, 35);
player.position = CGPointMake(self.frame.size.width/2, self.frame.size.height/2);
player.name = kPlayerName;
player.physicsBody = [SKPhysicsBody bodyWithCircleOfRadius:player.size.width/2];
player.physicsBody.dynamic = NO;
player.physicsBody.usesPreciseCollisionDetection = YES;
player.physicsBody.categoryBitMask = playerCategory;
player.physicsBody.restitution = 0;
player.physicsBody.collisionBitMask = enemyCategory | wallCategory;
player.physicsBody.contactTestBitMask = enemyCategory | bonusCategory;
[self addChild:player];
}
- (void)didMoveToView:(SKView *)view
{
[super didMoveToView:view];
if (!pan) {
pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:#selector(dragPlayer:)];
pan.minimumNumberOfTouches = 1;
pan.delegate = self;
[self.view addGestureRecognizer:pan];
}
}
-(void)dragPlayer: (UIPanGestureRecognizer *)gesture {
CGPoint trans = [gesture translationInView:self.view];
SKAction *moveAction = [SKAction moveByX:trans.x y:-trans.y duration:0];
[player runAction:moveAction];
[gesture setTranslation:CGPointMake(0, 0) inView:self.view];
}
Any ideas?
Related
I am trying to detect the collision between the ball node and either one of the paddle nodes but the message to confirm the collision is not being fired.
Could somebody help me understand where I am going wrong?
//categories for detecting contacts between nodes
static const uint32_t ballCategory = 0x1 << 0;
static const uint32_t paddleCategory = 0x1 << 1;
#interface GameScene ()
#property BOOL contentCreated;
#property(nonatomic) UITouch *playerOnePaddleControlTouch;
#property(nonatomic, weak) UITouch *paddleTouch;
#property(nonatomic) SKSpriteNode *paddleOneNode;
#property(nonatomic) SKSpriteNode *paddleTwoNode;
#property(nonatomic) SKSpriteNode *ballNode;
#property(nonatomic) SKLabelNode *playerOneScoreNode;
#property(nonatomic) SKLabelNode *playerTwoScoreNode;
#property(nonatomic) NSInteger playerOneScore;
#property(nonatomic) NSInteger playerTwoScore;
#end
#implementation GameScene
- (void)didMoveToView:(SKView *)view
{
if (!self.contentCreated)
{
[self createSceneContents];
self.contentCreated = YES;
}
}
- (void) createSceneContents
{
self.backgroundColor = [SKColor blackColor];
self.scaleMode = SKSceneScaleModeAspectFit;
[self addChild: [self newGameNode]];
self.physicsWorld.gravity = CGVectorMake(0, 0);
self.physicsWorld.contactDelegate = self;
// Create border around screen
SKPhysicsBody* borderBody = [SKPhysicsBody bodyWithEdgeLoopFromRect:self.frame];
self.physicsBody = borderBody;
self.physicsBody.friction = 0;
// Create Paddle One
SKSpriteNode *paddleOne = [self newPaddle];
paddleOne.position = CGPointMake(CGRectGetMidX(self.frame)/8, CGRectGetMidY(self.frame));
paddleOne.name = #"paddleOne";
paddleOne.physicsBody.categoryBitMask = paddleCategory;
paddleOne.physicsBody.contactTestBitMask = ballCategory;
[self addChild:paddleOne];
// Create Paddle Two
SKSpriteNode *paddleTwo = [self newPaddle];
paddleTwo.position = CGPointMake((CGRectGetMaxX(self.frame) - CGRectGetMidX(self.frame) / 8), CGRectGetMidY(self.frame));
paddleTwo.name = #"paddleTwo";
paddleTwo.physicsBody.categoryBitMask = paddleCategory;
paddleTwo.physicsBody.contactTestBitMask = ballCategory;
[self addChild:paddleTwo];
// Create ball
SKSpriteNode *ball = [self newBall];
ball.position = CGPointMake(CGRectGetMidX(self.frame), CGRectGetMidY(self.frame));
[self addChild:ball];
ball.physicsBody = [SKPhysicsBody bodyWithCircleOfRadius:ball.frame.size.width/2];
ball.physicsBody.friction = 1.0f; //normally 1.0f
ball.physicsBody.restitution = 1.0f; //normally 1.0f
ball.physicsBody.linearDamping = 0.0f; //normally 0.0f
ball.physicsBody.allowsRotation = NO;
ball.physicsBody.categoryBitMask = ballCategory;
ball.physicsBody.contactTestBitMask = paddleCategory;
[ball.physicsBody applyImpulse:CGVectorMake(1.0f, -1.0f)];
// Create score labels
self.playerOneScoreNode = [SKLabelNode labelNodeWithFontNamed:#"Helvetica"];
self.playerTwoScoreNode = [SKLabelNode labelNodeWithFontNamed:#"Helvetica"];
self.playerOneScoreNode.fontColor = self.playerOneScoreNode.fontColor = [SKColor whiteColor];
self.playerOneScoreNode.fontSize = self.playerTwoScoreNode.fontSize = 90;
self.playerOneScoreNode.position = CGPointMake((CGRectGetWidth(self.frame))* 0.25, (CGRectGetHeight(self.frame)) - 80);
self.playerTwoScoreNode.position = CGPointMake((CGRectGetWidth(self.frame)) * 0.75, (CGRectGetHeight(self.frame)) - 80);
[self addChild:self.playerOneScoreNode];
[self addChild:self.playerTwoScoreNode];
// Set Scores to 0
self.playerOneScore = 7;
self.playerTwoScore = 0;
self.playerOneScoreNode.text = [NSString stringWithFormat:#"%ld",self.playerOneScore];
self.playerTwoScoreNode.text = [NSString stringWithFormat:#"%ld",self.playerTwoScore];
}
- (SKSpriteNode *)newPaddle
{
SKSpriteNode *paddle = [[SKSpriteNode alloc]initWithColor:[SKColor whiteColor] size:CGSizeMake(16,64)];
return paddle;
}
- (SKSpriteNode *)newBall
{
SKSpriteNode *ball = [[SKSpriteNode alloc]initWithColor:[SKColor redColor] size:CGSizeMake(16, 16)];
return ball;
}
- (SKLabelNode *) newGameNode
{
SKLabelNode *gameNode = [SKLabelNode labelNodeWithFontNamed:#"Chalkduster"];
gameNode.text = #" Pong";
gameNode.fontSize = 50;
gameNode.position = CGPointMake(CGRectGetMidX(self.frame), CGRectGetMidY(self.frame));
gameNode.fontColor = [SKColor blueColor];
return gameNode;
}
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
self.paddleTouch = [touches anyObject];
UITouch *touch = [touches anyObject];
CGPoint touchPoint = [touch locationInNode:self];
SKNode *paddleOne = [self childNodeWithName:#"paddleOne"];
SKNode *paddleTwo = [self childNodeWithName:#"paddleTwo"];
if (touchPoint.x < CGRectGetMidX(self.frame)) {
paddleOne.position = CGPointMake(paddleOne.position.x, touchPoint.y);
}
else
{
paddleTwo.position = CGPointMake(paddleTwo.position.x, touchPoint.y);
}
}
- (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
if (self.paddleTouch) {
UITouch *touch = [touches anyObject];
CGPoint touchPoint = [touch locationInNode:self];
CGPoint previousPoint = [touch previousLocationInNode:self];
SKSpriteNode *paddleOne = (SKSpriteNode*)[self childNodeWithName:#"paddleOne"];
SKSpriteNode *paddleTwo = (SKSpriteNode*)[self childNodeWithName:#"paddleTwo"];
int paddleOneY = paddleOne.position.y + (touchPoint.y - previousPoint.y);
int paddleTwoY = paddleTwo.position.y + (touchPoint.y - previousPoint.y);
if (touchPoint.x < CGRectGetMidX(self.frame)) {
paddleOne.position = CGPointMake(paddleOne.position.x, paddleOneY);
}
else
{
paddleTwo.position = CGPointMake(paddleTwo.position.x, paddleTwoY);
}
}
}
// React to collision's between nodes/bodies
// Currently not working....need to understand this set of code.
-(void)didBeginContact:(SKPhysicsContact *)contact
{
SKPhysicsBody *firstBody;
SKPhysicsBody *secondBody;
if (contact.bodyA.categoryBitMask < contact.bodyB.categoryBitMask)
{
firstBody = contact.bodyA;
secondBody = contact.bodyB;
}
else
{
firstBody = contact.bodyB;
secondBody = contact.bodyA;
}
if (firstBody.categoryBitMask == ballCategory && secondBody.categoryBitMask == paddleCategory)
{
NSLog(#"Ball has touched Paddle");
}
}
#end
Your paddleOne and paddleTwo does not have SKPhysicsBody.
Add these (change size of physics body if needed)
paddleOne.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize: paddleOne.size];
paddleTwo.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize: paddleTwo.size];
didBeginContact doesnt get called for some reason. How can I fix this? Thanks! I set the category bitmasks and the skphysicsContactDelegate, yet it is still not registering contacts. I've been stuck at this for some time now.
#import "MyScene.h"
#import "FuelNode.h"
#import "SKSpriteNode+DebugDraw.h"
typedef NS_OPTIONS(uint32_t, CollisionCategory) {
CollisionCategoryPlayer = 1 << 0,
CollisionCategoryFuel = 1 << 1,
};
#interface MyScene() <SKPhysicsContactDelegate>
#end
#implementation MyScene
{
SKNode *_playerNode;
SKNode *_backgroundNode;
SKNode *_foreGround;
}
-(id)initWithSize:(CGSize)size
{
if (self = [super initWithSize:size]) {
self.physicsWorld.contactDelegate = self;
_backgroundNode = [self createBackground];
[self addChild:_backgroundNode];
_foreGround = [SKNode node];
[self addChild:_foreGround];
//add a fuelNode
FuelNode *fuel = [self createFuelAtPosition:CGPointMake(160, 440)];
[_foreGround addChild:fuel];
_playerNode = [self createPlayer];
[_foreGround addChild:_playerNode];
SKAction *actionMove = [SKAction moveToY:-100 duration:3.0];
[fuel runAction:actionMove];
NSLog(#"yea");
}
return self;
}
-(SKNode *)createPlayer
{
CGSize playerPhysicsBody;
//Create player
SKNode *playerNode = [SKNode node];
SKSpriteNode *player = [SKSpriteNode spriteNodeWithImageNamed:#"wship-3.png"];
player.position = CGPointMake(self.size.width/2, 120);
[playerNode addChild:player];
//Add physics
playerPhysicsBody = CGSizeMake(player.size.width/2, player.size.height/2);
playerNode.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:playerPhysicsBody];
playerNode.physicsBody.dynamic = NO;
//Setup collision settings
playerNode.physicsBody.usesPreciseCollisionDetection = YES;
playerNode.physicsBody.categoryBitMask = CollisionCategoryPlayer;
playerNode.physicsBody.collisionBitMask = 0;
playerNode.physicsBody.contactTestBitMask = CollisionCategoryFuel;
[player attachDebugRectWithSize:playerPhysicsBody];
return playerNode;
}
-(SKNode *)createBackground
{
//Create background
SKNode *bgNode = [SKNode node];
SKSpriteNode *bg = [SKSpriteNode spriteNodeWithImageNamed:#"purple"];
bg.anchorPoint = CGPointZero;
[bgNode addChild:bg];
return bgNode;
}
- (FuelNode *)createFuelAtPosition:(CGPoint)position
{
// 1
FuelNode *node = [FuelNode node];
[node setPosition:position];
[node setName:#"NODE_FUEL"];
// 2
SKSpriteNode *sprite;
sprite = [SKSpriteNode spriteNodeWithImageNamed:#"fuelBlue"];
[node addChild:sprite];
// 3
CGSize contactSize = CGSizeMake(sprite.size.width/2, sprite.size.height/2);
node.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:contactSize];
// 4
node.physicsBody.dynamic = NO;
//Setup collision settings
node.physicsBody.categoryBitMask = CollisionCategoryFuel;
node.physicsBody.collisionBitMask = 0;
//node.physicsBody.contactTestBitMask = CollisionCategoryPlayer;
[sprite attachDebugRectWithSize:contactSize];
//SKAction *actionMove = [SKAction moveToY:-100 duration:3.0];
//[node runAction:actionMove];
return node;
}
-(void)didBeginContact:(SKPhysicsContact *)contact
{
BOOL fuelCollision = NO;
SKNode *other = (contact.bodyA.node != _playerNode) ? contact.bodyA.node : contact.bodyB.node;
NSLog(#"collision");
fuelCollision = [(GameObjectNode *)other collisionWithPlayer:_playerNode];
}
#end
In order to enable contact detection, you need to set
node.physicsBody.dynamic = YES;
Have a look at the documentation as well.
Fixed! In the create player method I have mistakenly set the position of the player sprite instead of setting the position of the player node!
Im freaking out with this collision issue:
panned ball breaks out edgeloop body when panned fast. Anyone had simillar problem?
Here is scene code ilustrating the issue.
(Replacement MyScene in xcode sample - spritekitgame)
#import "SAMyScene.h"
/* Bitmask for the different entities with physics bodies. */
typedef enum : uint32_t {
SAColliderTypeBall = 0x1 << 1
,SAColliderTypeEdge = 0x1 << 3
} SAColliderType;
NSString * const SABallName = #"ballNode";
#interface SAMyScene()
#property (nonatomic, strong) UIPanGestureRecognizer *panGestureRecognizer;
#property (nonatomic, strong) SKShapeNode *ball;
#end
#implementation SAMyScene
-(id)initWithSize:(CGSize)size {
if (self = [super initWithSize:size]) {
/* Setup your scene here */
NSLog(#"Ball categorie bitmask =%d", SAColliderTypeBall);
NSLog(#"Edges categorie bitmask =%d", SAColliderTypeEdge);
self.backgroundColor = [SKColor colorWithRed:0.15 green:0.15 blue:0.3 alpha:1.0];
self.physicsBody = [SKPhysicsBody bodyWithEdgeLoopFromRect:self.frame];
self.physicsBody.categoryBitMask = SAColliderTypeEdge;
self.physicsBody.usesPreciseCollisionDetection = YES;
self.ball = [self newBallNode];
[self addChild:self.ball];
}
return self;
}
- (SKShapeNode *)newBallNode {
SKShapeNode *ball = [[SKShapeNode alloc] init];
CGMutablePathRef myPath = CGPathCreateMutable();
CGFloat radius = 60.0;
CGPathAddArc(myPath, NULL, 0,0, radius, 0, M_PI*2, YES);
ball.path = myPath;
ball.fillColor = [SKColor yellowColor];
ball.name = SABallName;
ball.position = CGPointMake(CGRectGetMidX(self.frame),CGRectGetMidY(self.frame));
ball.physicsBody = [SKPhysicsBody bodyWithCircleOfRadius:radius];
ball.physicsBody.affectedByGravity = NO;
ball.physicsBody.dynamic = YES;
ball.physicsBody.categoryBitMask = SAColliderTypeBall;
ball.physicsBody.contactTestBitMask = SAColliderTypeEdge;
ball.physicsBody.collisionBitMask = SAColliderTypeEdge;
ball.physicsBody.usesPreciseCollisionDetection = YES;
return ball;
}
-(void)update:(CFTimeInterval)currentTime {
//Called before each frame is rendered
}
- (UIPanGestureRecognizer *)panGestureRecognizer {
if (!_panGestureRecognizer) {
_panGestureRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self
action:#selector(handlePanFrom:)];
}
return _panGestureRecognizer;
}
- (void)didMoveToView:(SKView *)view {
if (![[self view].gestureRecognizers containsObject:self.panGestureRecognizer]) {
[[self view] addGestureRecognizer:self.panGestureRecognizer];
}
}
- (void)handlePanFrom:(UIPanGestureRecognizer *)recognizer {
if (recognizer.state == UIGestureRecognizerStateBegan) {
} else if (recognizer.state == UIGestureRecognizerStateChanged) {
CGPoint translation = [recognizer translationInView:recognizer.view];
translation = CGPointMake(translation.x, - translation.y);
[self panForTranslation:translation];
[recognizer setTranslation:CGPointZero inView:recognizer.view];
} else if (recognizer.state == UIGestureRecognizerStateEnded) {
}
}
- (void)panForTranslation:(CGPoint)translation {
CGPoint position = self.ball.position;
CGPoint newPos = CGPointMake(position.x + translation.x, position.y);
self.ball.position = newPos;
}
#end
I have tried my best to boil this question down as simple as possible. I have a coin object in my game:
#implementation
-(CollectableCoin*)initWithLocation:(CGPoint) Location andValue: (int) val
{
self = [super initWithImageNamed:#"coin"];
[self setScale:.35];
_value = val;
_collected = false;
self.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:self.size];
self.physicsBody.categoryBitMask = APAColliderTypeCoin;
self.physicsBody.collisionBitMask = APAColliderTypeBall;
self.physicsBody.mass = 0.00009;
self.physicsBody.restitution = .35;
self.position = Location;
self.name = #"collectableCoin";
return self;
}
#end
I also have a shelf object:
#implementation Shelf
-(Shelf*)initWithLocation:(CGPoint) location andWidth:(NSInteger) width
{
self = [super initWithImageNamed:#"shelf"];
if(self)
{
self.size = CGSizeMake(width, HEIGHT);
self.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:self.size];
self.physicsBody.dynamic = false;
self.physicsBody.restitution = 0;
self.position = location;
self.name = #"shelf";
SKSpriteNode* topOfShelf;
if(width > 5)
topOfShelf = [[SKSpriteNode alloc] initWithColor:[UIColor yellowColor] size:CGSizeMake(width-2, 1)];
else
topOfShelf = [[SKSpriteNode alloc] initWithColor:[UIColor yellowColor] size:CGSizeMake(width, 1)];
topOfShelf.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:topOfShelf.size];
topOfShelf.physicsBody.restitution = 1;
topOfShelf.physicsBody.dynamic = false;
topOfShelf.position = CGPointMake(0, location.y + self.size.height/2);
NSLog([NSString stringWithFormat:#"%f", location.y + self.size.height/2]);
NSLog([NSString stringWithFormat:#"%f", location.y]);
topOfShelf.name = #"shelf";
[self addChild:topOfShelf];
}
return self;
}
#end
I create a scene like so:
-(id)initWithSizeTest:(CGSize)size
{
self.physicsWorld.gravity = CGVectorMake(0, 0);
_gameState = READYTOSTART;
self.physicsWorld.contactDelegate = self;
if (self = [super initWithSize:size])
{
self.physicsWorld.gravity = CGVectorMake(0, 0);
for(int i = 0; i < 25; i++)
{
CollectableCoin* orb = [[CollectableCoin alloc] initWithLocation:CGPointMake(i*10, self.size.height*.75) andValue:1];
[self addChild:orb];
}
Shelf* shelf = [[Shelf alloc] initWithLocation:CGPointMake(self.size.width/2, self.size.height/2) andWidth:self.size.width];
[self addChild:shelf];
}
return self;
}
Here is the touchesBegan method:
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
/* Called when a touch begins */
if(_gameState == READYTOSTART)
{
self.physicsWorld.gravity = CGVectorMake(0, -2.0);
_gameState = PLAYING;
[[self childNodeWithName:#"taptostart"] removeFromParent];
}
When the scene starts, I have a row of coins hovering above a shelf, gravity is disabled, and I have a solid 60fps. When I tap the screen, the touchesbegan function enables gravity and the coins fall on the shelf, and the frame rate drops to 5fps. The didBeginContact function is not being called because the shelf object is not dynamic nor does it have contact or collision bitmasks, so I am fairly sure that it is not being overloaded by extraneous calls to didBeginContact. This happens on an iPad mini and an iPhone 4s, but not in any of the simulators. This is a very simple example of the actual problem that I am having. Anyone have any insights?
I've been trying to work on a simple Sprite Kit game that involves dodging red balls. I'm using the built-in gravity mechanism, but I'm having trouble preventing the player from falling through the ground. I've looked up a solution (set ground.physicsBody.dynamic = NO), but the player still falls through. What exactly do I need to do?
Edit: The green and brown texture is the ground. Right now the player is set to not being dynamic, so it is 'flying'
Here is my code in the MyScene.m file:
//
// MyScene.m
// DodgeMan
//
// Created by Cormac Chester on 3/8/14.
// Copyright (c) 2014 Testman Industries. All rights reserved.
//
#import "MyScene.h"
#import "EndGameScene.h"
static const uint32_t redBallCategory = 0x1 << 0;
static const uint32_t playerCategory = 0x1 << 1;
#implementation MyScene
-(id)initWithSize:(CGSize)size
{
if (self = [super initWithSize:size])
{
/* Setup your scene here */
//Sets player location
playerLocX = 50;
playerLocY = 100;
//Sets player score
score = 0;
//Set Background
self.backgroundColor = [SKColor colorWithRed:0.53 green:0.81 blue:0.92 alpha:1.0];
//Set Ground
SKSpriteNode *ground = [SKSpriteNode spriteNodeWithImageNamed:#"ground"];
ground.position = CGPointMake(CGRectGetMidX(self.frame), 34);
ground.xScale = 0.5;
ground.yScale = 0.5;
ground.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:ground.size];
ground.physicsBody.dynamic = NO;
//Player
self.playerSprite = [SKSpriteNode spriteNodeWithImageNamed:#"character"];
self.playerSprite.position = CGPointMake(playerLocX, playerLocY);
//Set Player Physics
self.playerSprite.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:self.playerSprite.size];
self.playerSprite.physicsBody.dynamic = YES;
self.playerSprite.physicsBody.categoryBitMask = playerCategory;
self.playerSprite.physicsBody.contactTestBitMask = redBallCategory;
self.playerSprite.physicsBody.collisionBitMask = 0;
self.playerSprite.physicsBody.usesPreciseCollisionDetection = YES;
//Score Label
self.scoreLabel = [SKLabelNode labelNodeWithFontNamed:#"Arial-BoldMT"];
self.scoreLabel.text = #"0";
self.scoreLabel.fontSize = 40;
self.scoreLabel.fontColor = [SKColor blackColor];
self.scoreLabel.position = CGPointMake(50, 260);
//Pause Button
self.pauseButton = [SKSpriteNode spriteNodeWithImageNamed:#"pauseButton"];
self.pauseButton.position = CGPointMake(self.frame.size.width / 2, self.frame.size.height - 40);
self.pauseButton.name = #"pauseButton";
//Add nodes
[self addChild:ground];
[self addChild:self.playerSprite];
[self addChild:self.scoreLabel];
//[self addChild:self.pauseButton];
//Sets gravity
self.physicsWorld.gravity = CGVectorMake(0,-2);
self.physicsWorld.contactDelegate = self;
}
return self;
}
-(void)addBall
{
SKSpriteNode *redBall = [SKSpriteNode spriteNodeWithImageNamed:#"locationIndicator"];
int minY = redBall.size.height / 2;
int maxY = self.frame.size.height - redBall.size.height / 2;
int rangeY = maxY - minY;
int actualY = (arc4random() % rangeY) + minY;
NSLog(#"Actual Y: %i", actualY);
//Initiates red ball offscreen
if (actualY >= 75)
{
//Prevents balls from spawning in the ground
redBall.position = CGPointMake(self.frame.size.width + redBall.size.width/2, actualY);
[self addChild:redBall];
}
redBall.physicsBody = [SKPhysicsBody bodyWithCircleOfRadius:redBall.size.width/2];
redBall.physicsBody.dynamic = YES;
redBall.physicsBody.categoryBitMask = redBallCategory;
redBall.physicsBody.contactTestBitMask = playerCategory;
redBall.physicsBody.collisionBitMask = 0;
redBall.physicsBody.affectedByGravity = NO;
redBall.physicsBody.usesPreciseCollisionDetection = YES;
//Determine speed of red ball
int minDuration = 3.0;
int maxDuration = 5.0;
int rangeDuration = maxDuration - minDuration;
int actualDuration = (arc4random() % rangeDuration) + minDuration;
// Create the actions
SKAction *actionMove = [SKAction moveTo:CGPointMake(-redBall.size.width/2, actualY) duration:actualDuration];
SKAction *actionMoveDone = [SKAction removeFromParent];
SKAction *ballCross = [SKAction runBlock:^{
score++;
self.scoreString = [NSString stringWithFormat:#"%i", score];
self.scoreLabel.text = self.scoreString;
NSLog(#"Score was incremented. Score is now %d", score);
}];
[redBall runAction:[SKAction sequence:#[actionMove, ballCross, actionMoveDone]]];
}
- (void)updateWithTimeSinceLastUpdate:(CFTimeInterval)timeSinceLast
{
self.lastSpawnTimeInterval += timeSinceLast;
if (self.lastSpawnTimeInterval > 0.5) {
self.lastSpawnTimeInterval = 0;
[self addBall];
}
}
-(void)update:(CFTimeInterval)currentTime
{
/* Called before each frame is rendered */
// Handle time delta.
//Prevents bad stuff happening
CFTimeInterval timeSinceLast = currentTime - self.lastUpdateTimeInterval;
self.lastUpdateTimeInterval = currentTime;
if (timeSinceLast > 1) { // more than a second since last update
timeSinceLast = 1.0 / 120.0;
self.lastUpdateTimeInterval = currentTime;
}
[self updateWithTimeSinceLastUpdate:timeSinceLast];
}
NSDate *startTime;
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
/* Called when a touch begins */
[super touchesBegan:touches withEvent:event];
//Starts Timer
startTime = [NSDate date];
UITouch *touch = [touches anyObject];
CGPoint location = [touch locationInNode:self];
SKNode *node = [self nodeAtPoint:location];
//Pauses Scene
if ([node.name isEqualToString:#"pauseButton"])
{
NSLog(#"Pause button pressed");
}
}
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
/* Called when a touch ends */
[super touchesEnded:touches withEvent:event];
NSTimeInterval elapsedTime = [startTime timeIntervalSinceNow];
NSString *elapsedTimeString = [NSString stringWithFormat:#"Elapsed time: %f", elapsedTime];
NSLog(#"%#", elapsedTimeString);
for (UITouch *touch in touches)
{
//Gets location of touch
CGPoint location = [touch locationInNode:self];
NSLog(#"Touch Location X: %f \n Touch Location Y: %f", location.x, location.y);
//Prevents destination from being in the ground
if (location.y < 88)
{
location.y = 87.5;
}
//Moves and animates player
//int velocity = elapsedTime * -3000;
int velocity = 800.0/1.0;
NSLog(#"Velocity: %i", velocity);
float realMoveDuration = self.size.width / velocity;
SKAction *actionMove = [SKAction moveTo:location duration:realMoveDuration];
[self.playerSprite runAction:[SKAction sequence:#[actionMove]]];
}
NSLog(#"Touch ended");
}
//Collision between ball and player
- (void)redBall:(SKSpriteNode *)redBall didCollideWithPlayer:(SKSpriteNode *)playerSprite
{
NSLog(#"Player died");
[redBall removeFromParent];
[playerSprite removeFromParent];
SKTransition *reveal = [SKTransition crossFadeWithDuration:0.5];
SKScene *endGameScene = [[EndGameScene alloc] initWithSize:self.size gameEnded:YES];
[self.view presentScene:endGameScene transition: reveal];
}
- (void)didBeginContact:(SKPhysicsContact *)contact
{
SKPhysicsBody *firstBody, *secondBody;
if (contact.bodyA.categoryBitMask < contact.bodyB.categoryBitMask)
{
firstBody = contact.bodyA;
secondBody = contact.bodyB;
}
else
{
firstBody = contact.bodyB;
secondBody = contact.bodyA;
}
//Red ball collides with the player
if ((firstBody.categoryBitMask & redBallCategory) != 0 && (secondBody.categoryBitMask & playerCategory) != 0)
{
[self redBall:(SKSpriteNode *) firstBody.node didCollideWithPlayer:(SKSpriteNode *) secondBody.node];
}
}
#end
you definitely can't set its dynamic to no brother. you need gravity effect that player. (he is not effected by physic world so he is flying right now. we need him to fall down to ground aren't we? :)
So here is the simple solution. idea is that you create a "invisible rectangle block" on the ground surface that has physic body. and you need to set its dynamic to no in order to prevent it falling down
so this block is a node obviously, and its size : as high as the ground , and as wide as the screen. and you need to adjust the position a little bit to put its upper bound right on the ground surface.
good luck
i actually drew a picture but i can't post it here because of my reputation :(
Your problem is with physicsBody's categoryBitMask and collisionTestBitMask.
Your bitwise declarations :
static const uint32_t redBallCategory = 0x1 << 0;
static const uint32_t playerCategory = 0x1 << 1;
This has actually set the following bit patterns (i've shortened to 8 bits for the example) :
redBallCategory - 00000001 and
playerCategory - 00000010
However in the following code, you tell the player to only collide with collision bit mask - 00000000;
self.playerSprite.physicsBody.collisionBitMask = 0;
So your first problem is here. The player will not collide with any category that you have defined.
Your second problem is you have not given the ground a categoryBitMask, or collisionBitMask. By default this means all bits are set, IE the ground's collisionBitMask is equal to 11111111;
There will be no collision between these two physics bodies.
Try this - i have simply added a third physics category, and edited your code slightly to set the ground categoryBitMask / collisionBitMask, and your player collisionBitMask.
static const uint32_t redBallCategory = 0x1 << 0;
static const uint32_t playerCategory = 0x1 << 1;
static const uint32_t groundCategory = 0x1 << 2;
#implementation MyScene
-(id)initWithSize:(CGSize)size
{
if (self = [super initWithSize:size])
{
/* Setup your scene here */
//Sets player location
playerLocX = 50;
playerLocY = 100;
//Sets player score
score = 0;
//Set Background
self.backgroundColor = [SKColor colorWithRed:0.53 green:0.81 blue:0.92 alpha:1.0];
//Set Ground
SKSpriteNode *ground = [SKSpriteNode spriteNodeWithImageNamed:#"ground"];
ground.position = CGPointMake(CGRectGetMidX(self.frame), 34);
ground.xScale = 0.5;
ground.yScale = 0.5;
ground.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:ground.size];
ground.physicsBody.categoryBitMask=groundCategory;
ground.physicsBody.collisionBitMask=playerCategory|redBallCategory;
ground.physicsBody.dynamic = NO;
//Player
self.playerSprite = [SKSpriteNode spriteNodeWithImageNamed:#"character"];
self.playerSprite.position = CGPointMake(playerLocX, playerLocY);
//Set Player Physics
self.playerSprite.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:self.playerSprite.size];
self.playerSprite.physicsBody.dynamic = YES;
self.playerSprite.physicsBody.categoryBitMask = playerCategory;
self.playerSprite.physicsBody.contactTestBitMask = redBallCategory;
self.playerSprite.physicsBody.collisionBitMask = groundCategory|redBallCategory;
self.playerSprite.physicsBody.usesPreciseCollisionDetection = YES;
//Score Label
self.scoreLabel = [SKLabelNode labelNodeWithFontNamed:#"Arial-BoldMT"];
self.scoreLabel.text = #"0";
self.scoreLabel.fontSize = 40;
self.scoreLabel.fontColor = [SKColor blackColor];
self.scoreLabel.position = CGPointMake(50, 260);
//Pause Button
self.pauseButton = [SKSpriteNode spriteNodeWithImageNamed:#"pauseButton"];
self.pauseButton.position = CGPointMake(self.frame.size.width / 2, self.frame.size.height - 40);
self.pauseButton.name = #"pauseButton";
//Add nodes
[self addChild:ground];
[self addChild:self.playerSprite];
[self addChild:self.scoreLabel];
//[self addChild:self.pauseButton];
//Sets gravity
self.physicsWorld.gravity = CGVectorMake(0,-2);
self.physicsWorld.contactDelegate = self;
}
return self;
}
Just:
self.playerSprite.physicsBody.dynamic = NO;
should work.
Your problem occurs due to scaling. For some reason in sprite kit scaling an image doesn't change it's size when used in following code. Judging by your pictures, your physics body rectangle for your ground is actually twice as big as you think and already engulfing the player, which is why there would by no collision detection. This is from recent experience with a very similar style game.
Do you have an edge loop physcis body around the scene? Collision flags and category flags set correctly so the player collides with the ground?
i had same problem and i soved it simply...
On the update method i've putted an if statement:
if(player.position.y<your_closest_value_near_ground){
player.position.y == your_Closest_value_near_ground
}
The comparition differs by the anchor point you have.. hope it helps someone