i create simple game like flapy bird with cocos2d v3 .
Interface class:
#interface GameScene : CCScene<CCPhysicsCollisionDelegate>
// -----------------------------------------------------------------------
+ (GameScene *)scene;
- (id)init;
// -----------------------------------------------------------------------
#end
In .m file:
_physicsWorld =[CCPhysicsNode node];
_physicsWorld.gravity=ccp(0, 0);
_physicsWorld.collisionDelegate=self;
_physicsWorld.debugDraw =YES;
[self addChild:_physicsWorld];
.........
bird.physicsBody=[CCPhysicsBody bodyWithRect:(CGRect){CGPointZero,bird.contentSize} cornerRadius:0];
bird.physicsBody.collisionGroup=#"birdGroup";
bird.physicsBody.collisionType=#"birdCollision";
[_physicsWorld addChild:bird];
........
tubeBody.physicsBody.collisionGroup =#"tubeGroup";
tubeBody.physicsBody.collisionType=#"tubeCollision";
tubeBody.physicsBody.type=CCPhysicsBodyTypeStatic;
[_physicsWorld addChild:tubeBody];
-(BOOL)ccPhysicsCollisionBegin:(CCPhysicsCollisionPair *)pair typeA:(CCNode *)nodeA typeB:(CCNode *)nodeB{
[self endGame];
NSLog(#"end game");
return YES;
}
why method ccPhysicsCollisionBegin never call?
Change
-(BOOL)ccPhysicsCollisionBegin:(CCPhysicsCollisionPair *)pair typeA:(CCNode *)nodeA typeB:(CCNode *)nodeB{
To:
-(BOOL)ccPhysicsCollisionBegin:(CCPhysicsCollisionPair *)pair tubeCollision:(CCNode *)nodeA birdCollision:(CCNode *)nodeB{
You have the example code of the collision delegate, so you have to adapt it to your code with your nodeA that is the tube and nodeB the bird.
Related
I've been struggling for days with that problem: I have CCNode >> StateComponent and in the StateComponent I have a CCSprite as an attribute and add it as a child in StateComponent. When I set the position of an StateComponent object and NOT of the sprite, the bounding box of the StateComponent object appears at the right place. The default values for a sprite position are set on (0,0). The bounding box of the sprite appears at (0,0) but the sprite texture is shifted from (0,0).
I add the StateComponent object afterwards to a CCScene.
Could maybe someone help me with advice: how can I set the sprite position so that the texture and bounding box appears at the same position as the StateComponent object? Later I'd like to detect if there is a touch on the node(sprite) and then rotate the node with the sprite.
Any help would be really appreciated!!!
#interface StateComponent : CCNode {
}
#end
#implementation StateComponent
-(instancetype) initWithGestureStatewithSprite:(CCSprite*) sprite andPosition: (CGPoint) spritePosition RelativeAngle:(float) angle {
self = [super init];
if (!self) {
return nil;
}
self.sprite = sprite;
self.relativeAngle = angle;
self.position = spritePosition;
[self addChild:sprite];
return self;
}
#end
#interface StateViewScene : CCScene {
}
#end
#implementation StateViewScene
-(id) init {
self = [super init];
if (!self) {
return nil;
}
StateComponent * body = [[StateComponent alloc] initWithGestureStatewithSprite [CCSprite spriteWithImageNamed:#"body.png"] andPosition: CGPointMake(512,384) RelativeAngle:0];
[self addChild:body];
return self;
}
Have you tried to set the content Size of the Node to the Sprite content Size?
-(instancetype) initWithGestureStatewithSprite:(CCSprite*) sprite andPosition: (CGPoint) spritePosition RelativeAngle:(float) angle {
...
self.contentSize = sprite.contentSize;
...
I managed to solve the problem by converting to node space the StateComponent position couple of times as I actually have a tree like structure of StateComponents with sprites.
Thanks for the help! :)
---Edit---
This article helped me and might be interesting: http://www.koboldtouch.com/display/IDCAR/Converting+Between+Coordinate+Spaces
I'm currently trying out a few things. I already did this tutorial: https://www.makegameswith.us/tutorials/getting-started-with-spritebuilder/
However I'm a little stuck now.
I created a CCNode in SpriteBuilder and added 3 images. carbody.png and 2 wheel.png.
I made all objects physicsObjects.
In code I tried to connect them with joints and move them. However the carBody moves but the wheels keep staying on their place.
#import "Car.h"
#implementation Skater{
CCNode *_wheel1;
CCNode *_wheel2;
CCNode *_carBody;
CCPhysicsJoint *_bodyWheelJoint1;
CCPhysicsJoint *_bodyWheelJoint2;
}
- (id)init {
self = [super init];
if (self) {
[_wheel1.physicsBody setCollisionGroup: _carBody];
[_wheel2.physicsBody setCollisionGroup: _carBody;
[_carBody.physicsBody setCollisionGroup: _carBody];
_bodyWheelJoint1 = [CCPhysicsJoint connectedPivotJointWithBodyA:_wheel1.physicsBody bodyB: _carBody.physicsBody anchorA:_wheel1.anchorPointInPoints];
_bodyWheelJoint2 = [CCPhysicsJoint connectedPivotJointWithBodyA:_wheel2.physicsBody bodyB: _carBody.physicsBody anchorA:_wheel2.anchorPointInPoints];
}
return self;
}
And in Gameplay.m I only did this:
-(void)didLoadFromCCB{
[_car runAction:
[CCActionMoveTo actionWithDuration:10 position:CGPointMake(2000,_car.position.y)]];
}
The carBody moves, the wheels don't...
What am I missing?
Edit:
I made a few changes now but my wheels still keep staying on their place...
#import "Car.h"
#implementation Car{
CCNode *_wheel1;
CCNode *_wheel2;
CCNode *_carBody;
CCPhysicsJoint *_bodyWheelJoint1;
CCPhysicsJoint *_bodyWheelJoint2;
}
- (id)init {
self = [super init];
if (self) {
CCLOG(#"Car created");
[_wheel1.physicsBody setCollisionGroup:_carBody];
[_wheel2.physicsBody setCollisionGroup:_carBody];
[_carBody.physicsBody setCollisionGroup:_carBody];
_bodyWheelJoint1 = [CCPhysicsJoint connectedPivotJointWithBodyA:_wheel1.physicsBody bodyB:_carBody.physicsBody anchorA:_wheel1.anchorPointInPoints];
_bodyWheelJoint2 = [CCPhysicsJoint connectedPivotJointWithBodyA:_wheel2.physicsBody bodyB:_carBody.physicsBody anchorA:_wheel2.anchorPointInPoints];
}
return self;
}
-(void)moveCar:(int)distance{
CCLOG(#"Car should move");
CGPoint launchDirection = ccp(1, 0);
CGPoint force = ccpMult(launchDirection, distance);
[self.physicsBody applyForce:force];
}
#end
You're simply missing the point that move (and other) actions bypass physics. Once a node has a physics body, the use of CCAction* classes that change position and rotation is a no-no, and most others (ie scale) will not be applied to the physics body either but can still be used safely.
To move a physics object, apply an impulse or force to the physics body.
So after taking a little break after being very frustrated for months on end with this issue, I am now back and attempting to solve my issue once and for all.
I’m not going to post code, because the code I have is messy and patchy and is from countless points of view.
My issue is this:
I have a sprite, and his information is stored in a class called player.m. I have a game level, and it is stored in GameLevelLayer.m
I have player.m store velocity, direction, and all the information about the character, and then I have the GameLevelLayer.m implement, move, use bounds to check collisions, etc.
I now want to make the character move using a spritesheet (I know how to do spritesheeting, I just don’t know how to do it while working with two different classes)
My question is, do I create the batchnodes and spritesheet information (CCBatchnodes, caches, etc) and all of the actions and everything in player.m, and then run them in GameLevelLayer.m? Or do I create all that in GameLevelLayer.m
I really need some help here because I’ve been stuck on this for months
EDIT:
Here is where I am, thanks to a suggestion from a community member.
This is my entire player.m (Long story short, I define everything about the player 'you might just want to pay attention to the init, because that seems to be the problem. The other stuff is my physics engine')
#import "Player.h"
#import "SimpleAudioEngine.h"
#import "GameLevelLayer.h"
#implementation Player
#synthesize velocity = _velocity;
#synthesize desiredPosition = _desiredPosition;
#synthesize onGround = _onGround;
#synthesize forwardMarch = _forwardMarch, mightAsWellJump = _mightAsWellJump, isGoingLeft = _isGoingLeft;
#synthesize WalkAction = _WalkAction;
#synthesize isMoving = _isMoving;
-(id)initWithTexture:(CCTexture2D *)texture{
if (self = [super init]) {
self.velocity = ccp(0.0, 0.0);
[[CCSpriteFrameCache sharedSpriteFrameCache] addSpriteFramesWithFile: #"BankerSpriteSheet_default.plist"];
CCSpriteBatchNode *spriteSheet = [CCSpriteBatchNode batchNodeWithFile:#"BankerSpriteSheet_default.png"];
[self addChild:spriteSheet];
NSMutableArray *walkAnimFrames = [NSMutableArray array];
for(int i = 1; i <=6; ++i) {
[walkAnimFrames addObject: [[CCSpriteFrameCache sharedSpriteFrameCache] spriteFrameByName: [NSString stringWithFormat:#"banker%d.png", i]]];
CCAnimation *walkAnim = [CCAnimation animationWithFrames:walkAnimFrames delay:0.1f];
self = [super initWithSpriteFrameName:#"banker1.png"];
self.WalkAction = [CCRepeatForever actionWithAction:[CCAnimate actionWithAnimation:walkAnim restoreOriginalFrame:NO]];
//[_Banker runAction:_WalkAction];
[spriteSheet addChild:self];
[[CCAnimationCache sharedAnimationCache] addAnimation:walkAnim name:#"walkAnim"];
}
}
return self;
}
-(void)update:(ccTime)dt {
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults synchronize];
CGPoint jumpForce = ccp(0.0, 310.0);
float jumpCutoff = 150.0;
if (self.mightAsWellJump && self.onGround) {
self.velocity = ccpAdd(self.velocity, jumpForce);
if (![defaults boolForKey:#"All Muted"]) {
if (![defaults boolForKey:#"SFX Muted"]) {
[[SimpleAudioEngine sharedEngine] playEffect:#"jump.wav"];
}
}
} else if (!self.mightAsWellJump && self.velocity.y > jumpCutoff) {
self.velocity = ccp(self.velocity.x, jumpCutoff);
}
CGPoint gravity = ccp(0.0, -450.0);
CGPoint gravityStep = ccpMult(gravity, dt);
CGPoint forwardMove = ccp(800.0, 0.0);
CGPoint forwardStep = ccpMult(forwardMove, dt);
self.velocity = ccp(self.velocity.x * 0.90, self.velocity.y); //2
if (self.forwardMarch) {
self.velocity = ccpAdd(self.velocity, forwardStep);
if (!self.isMoving) {
//[self runAction: _WalkAction];
//self.isMoving = YES;
}
} //3
CGPoint minMovement = ccp(0.0, -450.0);
CGPoint maxMovement = ccp(120.0, 250.0);
self.velocity = ccpClamp(self.velocity, minMovement, maxMovement);
self.velocity = ccpAdd(self.velocity, gravityStep);
CGPoint stepVelocity = ccpMult(self.velocity, dt);
if (!self.isGoingLeft) {
self.desiredPosition = ccpAdd(self.position, stepVelocity);
}else{
self.desiredPosition = ccp(self.position.x-stepVelocity.x, self.position.y+stepVelocity.y);
}
}
-(CGRect)collisionBoundingBox {
CGRect collisionBox = CGRectInset(self.boundingBox, 3, 0);
//CGRect collisionBox = self.boundingBox;
//collisionBox = CGRectOffset(collisionBox, 0, -2);
CGPoint diff = ccpSub(self.desiredPosition, self.position);
CGRect returnBoundingBox = CGRectOffset(collisionBox, diff.x, diff.y);
return returnBoundingBox;
}
#end
So now the issue is, how do i get the player to appear in the game like a normal sprite, and then how do I run the animations when the player begins to move forward
Your game architecture is very good! Keep player properties on player and use GameLayer only to send player actions is the best approach.
If your Player Class extends from CCSprite, put everithing related to player in your Player Class: Run animations on it, load the cache on player constructor (use the CCSprite initWithTexture:rect:rotated: or a custom autorelease constructor, like a +(id)player ).
Then, in your GameLevelLayer you will need a CCSpriteBatchNode to add your player to it. You can use this batch node to add other objects that use same spritesheet.
EDIT:
Reviewing your code, your initWithTexture is wrong. The correct is to call [super initWithTexture:]:
-(id)initWithTexture:(CCTexture2D *)texture{
if (self = [super initWithTexture:texture]) {
Then, in your GameLevelLayer, create your player and add it to a CCSpriteBatchNode:
// *** In GameLevelLayer.m ***
// Create player
Player *player = [Player spriteWithFile:#"player.png"];
// Create batch node
CCSpriteBatchNode *batchNode = [CCSpriteBatchNode batchNodeWithTexture:player.texture];
// Add batch node as child
[self addChild:batchNode];
// Add player as batch node's child
[batchNode addChild:player];
// Set player position
player.position = ccp(100,100);
Your GameLevelLayer needs to do only this to create your Player. And when it detects user input, call methods like "jump", "moveRight", "moveLeft" in your player. Also detect collisions and send actions to player like "die", "getSpecialItem".
// *** In GameLevelLayer.m ***
[player jump];
[player die];
So, your player needs to handle these methods and performs its own logic to do the actions:
// *** In Player.m ***
- (void)moveRight
{
self.position = ccpAdd(self.position, ccp(10,0));
}
What I'm trying to achieve is the ability to use a Cocos2d SneakyInput SneakyJoystick to control the movement of my LHSprite (created using level helper) Character/Player in my box2d/cocos2d game.
I can get it to work, however, the sneakyJoystick joystick is in the same layer that my gameplay is in, and seen as though my game screen 'follows' the character - the joystick actually moves off the screen when the camera/screen is moved.
I have tried setting the joystick up in a separate layer ('MyUILayer'), and using it to control my character in my 'GameLayer'.
Here is how i've tried doing this:
in 'MyUILayer' i have the code to set up the following sneakyJoystick components:
#interface MyUILayer : CCLayer {
SneakyJoystick *leftJoystick;
SneakyButton * jumpButton;
SneakyButton * attackButton;
}
#property (readonly) SneakyButton *jumpButton;
#property (readonly) SneakyButton *attackButton;
#property (readonly) SneakyJoystick *leftJoystick;
Now, in 'GameLayer I tried to access the value created by the sneakyJoystick called 'leftJoystick' in 'MyUILayer'.
in the declaration file (GameLayer.h):
#import "MyUILayer.h"
#interface GameLayer : CCLayer {
//.............
LHSprite *character;
b2Body *characterBody;
SneakyJoystick *characterJoystick;
SneakyButton *jumpButton;
SneakyButton *attackButton;
//.............
}
in GameLayer.mm:
//in my INIT method
{
MyUILayer *UILAYER = [[MyUILayer alloc]init];
characterJoystick = UILAYER.leftJoystick;
[self scheduleUpdate];
// Define what 'character' is and what 'characterBody' is ('character is a LHSprite, and 'characterBody' is a b2Body)
}
//in my tick method
{
b2Vec2 force;
force.Set(characterJoystick.velocity.x * 10.0f, 0.0f);
characterBody->ApplyForce(force, characterBody->GetWorldCenter());
}
I really can't understand why 'characterBody', in 'GameLayer' won't move based on the value of 'leftJoystick', in 'MyUILayer'.
Sorry if its a bit long winded! - I have also uploaded my project file, so you can take a look at the project itself: https://dl.dropbox.com/u/2578642/ZOMPLETED%202.zip
Huge thanks to anyone who can help!
The problem lies in the way you are associating the MyUILayer with the GameLayer. On myscene.mm, you are creating a MyUILayer and a GameLayer, and adding them both to the scene. This is ok. But then, you make a NEW MyUILayer on GameLayer, and associate that joystick. You should associate the joystick in the MyScene.mm by using properties like so:
In MyScene.mm
// Control Layer
MyUILayer * controlLayer = [MyUILayer node];
[self addChild:controlLayer z:2 tag:2];
// Gameplay Layer
GameLayer *gameplayLayer = [GameLayer node];
gameplayLayer.attackButton = controlLayer.attackButton;
gameplayLayer.leftJoystick = controlLayer.leftJoystick;
gameplayLayer.jumpButton = controlLayer.jumpButton;
[self addChild:gameplayLayer z:1 tag:1];
In GameLayer.h add
#property (nonatomic, retain) SneakyButton *jumpButton;
#property (nonatomic, retain) SneakyButton *attackButton;
#property (nonatomic, retain) SneakyJoystick *leftJoystick;
In GameLayer.mm add
#synthesize jumpButton = jumpButton;
#synthesize attackButton = attackButton;
#synthesize leftJoystick = characterJoystick;
In GameLayer.mm, remove the UILAYER code in the init method
- (id)init
{
self = [super init];
if (self) {
//instalize physics
[self initPhysics];
[self lvlHelper];
[self characterLoad];
[self runAction:[CCFollow actionWithTarget:character worldBoundary:CGRectMake(0, -100, 870, 420)]];
[self scheduleUpdate];
}
return self;
}
Hey people,
I'm creating a game in cocos2d, (I'm very new to it, and was trying to solve this thing)
in the game I'm making I created a "Bomb" class, and a "Player" class,
I want the bomb to check for collision with the player, if a collision detected, explode.
My problem is that I have no idea how to get the player's position from the bomb class,
I'd be happy if you guys could help me out here,
Thanks!
You did add the CCSprites to a CCLayer, didn't you? Then that CCLayer should have the access to both of them. So, you can use the CCLayer's tick function to track the positions of the CCSprites and trigger actions if their bounding boxes overlap.
Some sample code to illustrate:
#interface MyLayer : CCLayer {
BombSprite *bomb;
PlayerSprite *player;
}
...
#end
#implementation MyLayer
- (id)init {
if ((self = [super init])) {
bomb = ...
player = ...
[self schedule:#selector(tick:)];
}
return self;
}
- (id)tick:(ccTime)dt {
if (CGRectContainsRect([bomb boundingBox], [player boundingBox])) {
NSLog(#"Collision!");
// call [player didCollideWith:bomb] or something
...
}
}
#end