I am studying the SpriteBuilder to make the example Peeved Penguins,but on the Joint step I set the _physicsNode.debugDraw = TRUE,it cash when I run my game,I don't know how to fix it.
If this is in obj-c, then you enable the debugDraw when you define the physicsWorld properties like this:
physicsWorld = [CCPhysicsNode node];
physicsWorld.gravity = ccp(0,0);
physicsWorld.debugDraw = NO;
physicsWorld.collisionDelegate = self;
[self addChild:physicsWorld];
This is assuming that you have created a physics world
Related
ok so i've been messing around with chipmunk a bit, and i can get two sprites to bounce off of each other, but when i try to use the following method, it never fires,
-(BOOL)ccPhysicsCollisionBegin:(CCPhysicsCollisionPair *)pair tower:(CCNode *)nodeA BG:
(CCNode *)nodeB
{
NSLog(#"HELLO");
return YES;
}
Heres where I create the physics node:
_physics = [CCPhysicsNode node];
_physics.debugDraw = YES;
[self addChild:_physics z:1];
_physics.collisionDelegate = self;
I use this code to create the first sprite:
background = [CCSprite spriteWithImageNamed:gameLevelImage];
[background setPosition:ccp(winSize.width/2,winSize.height/2)];
background.physicsBody.collisionType = #"BG";
background.physicsBody = [CCPhysicsBody bodyWithCircleOfRadius:50 andCenter:self.position];
and this for the other :
tower = [[TowerType alloc] initWithTheGame:self location:ccp(winSize.width/2, winSize.height/2)];
[towers addObject:tower];
[self MenuItemsVisible];
tower.physicsBody = [CCPhysicsBody bodyWithCircleOfRadius:50 andCenter:tower.position];
tower.physicsBody.collisionType = #"tower";
I also have the protocol in the h file.
if anyone knows whats happening help would be greatly appreciated. (:
First of all, are both bodies under the same CCPhysicsNode?
Second, ccPhysicsCollisionBegin is just called when the collision BEGIN, so as both of your bodies are one over the other and they aparenttly will move together due to gravity the collision will never begin, because they started colliding. The cycle for collision evaluation is:
ccPhysicsCollisionBegin: called once both bodies start colliding
ccPhysicsCollisionPreSolve: called every frame update, before physics calculations
ccPhysicsCollisionPostSolve : called every frame, after physics calculations
ccPhysicsCollisionSeparates: called once they separate
Make sure your sprites are allocated properly before you try to set the collisionType. That was the issue for me in my similar case.
I'm having a strange problem... I have a custom class with sprite and booleans properties
In my main GameLayer, I have CCLayerColor *my1layer and in my .m section I have this code:
my1layer = [CCLayerColor layerWithColor:ccc4(144,238,144, 255)];
[self addChild: my1layer z:5 tag:100];
[my1layer setContentSize:CGSizeMake(200, 1280)];`
//default start position
my1layer =ccp(s.width/2-420, s.height-s.height+180.);
MylmageItem *postImage1 = [[MylmageItem alloc] initWithLayer:self];
[postImage1 release];
postImage1.postImageNum=CCRANDOM_0_1()*12 +1;
postImage1.postImage = [CCSprite spriteWithSpriteFrameName:(NSString*)[self assignPostImage:postImage1.postImageNum ]];
postImage1.postImage.position =ccp(my1layer.contentSize.width/2, my1layer.contentSize.height-my1layer.contentSize.height+80);
[my1layer addChild:myImage1.slotImage z:6 tag:101];’
code above does work and shows the images on layer, however when I try to access the property postImage1.postImageNum, it shows 0 always...
I do this: CCLayer *myLayer1 = (CCLayer*)[self getChildByTag:100]; later to retrieve my object...
MyImageItem *tmpImage1 = (MymageItem*)[myLayer1 getChildByTag:101]; from here I always get 0 when I do CCLOG(#"postImage1.postImageNum %d",tmpImage1.postImageNum);
How do I get data from my1layer?
I have been trying to figure this out for a couple of days now but I haven't been able to figure out what my problem is.
So I am using cocos2d with chipmunk-spaceManager to create my game. So what I am doing is creating 4 cpShapes that are attached to one cpBody and attaching them to a CCSprite. Here is my code.
- (id) helmetInit:(Game*)game {
cpShape *helmet_1;
cpShape *helmet_2;
cpShape *helmet_3;
cpShape *reference = [game.spaceManager addCircleAt:cpvzero mass:STATIC_MASS radius:2];
helmet_1 = [game.spaceManager addCircleToBody:reference->body radius:20 offset:cpv(-5, 2)];
helmet_2 = [game.spaceManager addCircleToBody:reference->body radius:8 offset:cpv(16, -14)];
helmet_3 = [game.spaceManager addCircleToBody:reference->body radius:8 offset:cpv(8, -14)];
reference->group = 1;
// helmet_1->group = 1;
// helmet_2->group = 1;
// helmet_3->group = 1;
[self initWithFile:#"Helmet.png"];
[self setShape:reference];
//[self setBody:reference->body];
self.spaceManager = game.spaceManager;
self.autoFreeShapeAndBody = YES;
gameScreenSize = game.contentSize;
return self;
}
So my problem is the only time that I get any collisions is if one of my other shapes in my game collide with the (reference shape) which is the shape that is created with the body that all the shapes are sharing. If I understand the way chipmunk works, doesn't every shape have collisions, because the other shapes are like there not even there. Other shapes pass right through them until they collide with the reference shape which is the only shape that has any collisions right now. Am I doing something wrong or do I not understand the way chipmunk works?
Here is a screenshot of the 4 shapes that I have created.
Ok, with a lot of frustration I have finally figured out my problem. I was moving a static shape after the chipmunk space had begun simulating. So I fixed it by setting smgr.rehashStaticEveryStep = YES;
I think I'm just understanding scaling/positioning nodes/layers incorrectly. I'm setting up my node like this (node class is derived from CCNode):
-(id) init
{
if ((self = [super init]))
{
// Create parallax background node.
background = [BackgroundNode node];
[self addChild:background z:0];
// Create foreground node.
foreground = [ForegroundLayer node];
[self addChild:foreground z:0];
self.position.y = 500.0f;
self.scaleX = 1.5f;
self.scaleY = 1.5f;
}
return self;
}
It doesn't seem to matter what I set the self.position.y to - the scaled node is always displayed as though it was positioned in the bottom-left of the screen. I've tried playing around with anchorPoint as well, but it doesn't really seem to change anything.
The reason I'm asking is because I'd like to be able to pan vertically when I'm zoomed in - this doesn't seem to really be the right way to accomplish it, though. Any ideas?
self.position.y = 500.0f;
doesn't work. It should be
self.position = ccp(self.position.x, 500.0f);
Please refer to "Cocoa Objective-c Property C structure assign fails".
I just have a simple sprite - how can I get it to rotate?
A good answer would show how to rotate both a dynamic sprite and a static_mass sprite
If the sprite is dynamic / non-static, just do like so:
cpBodySetAngVel(ObjSmSprite.shape->body,0.25);
For a static body, you can do something like this:
[ObjSmStaticSprite.shape runAction:[CCRepeatForever actionWithAction:
[CCSequence actions:
[CCRotateTo actionWithDuration:2 angle:180],
[CCRotateTo actionWithDuration:2 angle:360],
nil]
]];
smgr.rehashStaticEveryStep = YES; //Setting this would make the smgr recalculate all static shapes positions every step
To Summarize, here is a spinning static sprite, following be spinning dynamic sprite.
// Add Backboard
cpShape *shapeRect = [smgr addRectAt:cpvWinCenter mass:STATIC_MASS width:200 height:10 rotation:0.0f ];// We're upgrading this
cpCCSprite * cccrsRect = [cpCCSprite spriteWithShape:shapeRect file:#"rect_200x10.png"];
[self addChild:cccrsRect];
// Make static object update moves in chipmunk
// Since Backboard is static, and since we're going to move it, it needs to know about spacemanager so its position gets updated inside chipmunk.
// Setting this would make the smgr recalculate all static shapes positions every step
// cccrsRect.integrationDt = smgr.constantDt;
// cccrsRect.spaceManager = smgr;
// Alternative method: smgr.rehashStaticEveryStep = YES;
smgr.rehashStaticEveryStep = YES;
// Spin the backboard
[cccrsRect runAction:[CCRepeatForever actionWithAction:
[CCSequence actions:
[CCRotateTo actionWithDuration:2 angle:180],
[CCRotateTo actionWithDuration:2 angle:360],
nil]
]];
// Add the hoop
cpShape *shapeHoop = [smgr addCircleAt:ccp(winSize.width/2.0f,winSize.height/2.0f - 55.0f) mass:1.0 radius: 50 ];
cpCCSprite * cccrsHoop = [cpCCSprite spriteWithShape:shapeHoop file:#"hoop_100x100.png"];
[self addChild:cccrsHoop];
cpBodySetAngVel(cccrsHoop.shape->body,0.25);
Disclaimer: I'm trying to answer my own question, and this answer might be missing important subtleties - it just represents what I know, so far.
If using cocos2d
use this code in tick to update positon all time _number1.position is the position you would update to, so when _number1 moves _logo2 will rotate to face it
_logo2.rotation = CC_RADIANS_TO_DEGREES(-ccpToAngle(ccpSub(_number1.position, _logo2.position)));
update _logo1 rotation by touch put this code in touch event handler
_logo2.rotation = CC_RADIANS_TO_DEGREES(-ccpToAngle(ccpSub(location, _logo2.position)));
use this as an action
[_logo2 runAction:[CCRotateTo actionWithDuration:0.0 angle:CC_RADIANS_TO_DEGREES(-ccpToAngle(ccpSub(location, _logo2.position)))]];
hope this helps someone took me ages to work it out