How to make CCFollow follow the mouse and move camera with mouse?
1 - How to make like angrybirds, move around scene using mouse with cocos2d-x?
2 - How to make CCFollow, follow the mousejoint, and where i drag the physicsprite the camera follow it.
When you drag the physicsprite, you can get the position and use “CCMoveTo” to move current layer
But i dont understand it. If i move the current layer and i have only one layer, it go out of screen. Im using the HelloCpp project that come with cocos2d-x.
I made:
CCMoveTo* action = CCMoveTo::create(1.0f, selectedObject->getBodyPosition());
runAction(action);
Nothing happen. When i debug the property endPosition of action change when i move the object, but the camera stay on the same place 
you should move current layer with opposite position,
@
CCMoveTo* action = CCMoveTo::create(1.0f, ccpMult(selectedObject~~>getBodyPosition,~~1));
runAction(action);
@
Nothing happen with this. Look my code:
#include "HelloWorldScene.h"
CCScene* HelloWorld::scene()
{
// 'scene' is an autorelease object
CCScene *scene = CCScene::create();
// 'layer' is an autorelease object
HelloWorld *layer = HelloWorld::create();
// add layer as a child to scene
scene->addChild(layer, 1);
// return the scene
return scene;
}
bool HelloWorld::init()
{
CCLOG("INIT GAME");
if ( !CCLayer::init() )
{
return false;
}
setTouchEnabled(true);
CCSize visibleSize = CCDirector::sharedDirector()->getVisibleSize();
CCPoint origin = CCDirector::sharedDirector()->getVisibleOrigin();
createBox2DWorld();
layerBackground = CCLayer::create();
CCSprite *backgroundSprite = CCSprite::create("backgroundGame.png");
backgroundSprite->setPosition(ccp(visibleSize.width/2 + origin.x, visibleSize.height/2 + origin.y));
layerBackground->addChild(backgroundSprite, 0);
addChild(layerBackground, 0);
/*
char1Sprite = CCSprite::create("character1.png");
char1Sprite->setPosition(ccp(visibleSize.width/2 + origin.x, visibleSize.height/2 + origin.y));
addChild(char1Sprite);
int num = 3;
b2Vec2 verts[] = {
b2Vec2(60.0f / PTM_RATIO, 0.0f / PTM_RATIO),
b2Vec2(32.0f / PTM_RATIO, 75.0f / PTM_RATIO),
b2Vec2(0.0f / PTM_RATIO, 0.0f / PTM_RATIO)
};
createBox2DBodyForSprite(char1Sprite, num, verts);
*/
for(int x = 1; x <= 7; x++)
{
//std::string textureName = "character" + Util::intToString(x) + ".png";
std::string textureName = "object" + Util::intToString(x) + ".png";
CCSprite *charTexture = CCSprite::create(textureName.c_str());
CCSize charSize = charTexture->getContentSize();
PhysicsSprite *charPhysicsSprite = new PhysicsSprite();
charPhysicsSprite->initWithTexture(charTexture->getTexture(), CCRectMake(0, 0, charSize.width, charSize.height));
CCPoint p = ccp(visibleSize.width/2 + origin.x, visibleSize.height/2 + origin.y);
// Define the dynamic body.
//Set up a 1m squared box in the physics world
b2BodyDef bodyDef;
bodyDef.type = b2_dynamicBody;
bodyDef.position.Set(p.x/PTM_RATIO, p.y/PTM_RATIO);
b2Body *body = world->CreateBody(&bodyDef);
b2PolygonShape dynamicBox;
dynamicBox.SetAsBox(charSize.width/PTM_RATIO/2, charSize.height/PTM_RATIO/2);
// Define the dynamic body fixture.
b2FixtureDef fixtureDef;
fixtureDef.shape = &dynamicBox;
fixtureDef.density = 0.5f;
fixtureDef.friction = 0.2f;
body->CreateFixture(&fixtureDef);
charPhysicsSprite->setPhysicsBody(body);
addChild(charPhysicsSprite);
}
addCheckPoints();
createObjects();
scheduleUpdate();
return true;
}
void HelloWorld::createObjects()
{
// selected and camera object
//selectedObject = new PhysicsSprite();
//cameraObject = CCSprite::create();
//cameraObject->retain();
//CCFollow* actionFollow = CCFollow::create(cameraObject, CCRect::CCRect(0.0f, 0.0f, 20000.0f, 20000.0f));
//runAction(actionFollow);
}
void HelloWorld::addCheckPoints()
{
CCSize visibleSize = CCDirector::sharedDirector()->getVisibleSize();
CCPoint origin = CCDirector::sharedDirector()->getVisibleOrigin();
std::string textureName = "checkpoint1.png";
CCSprite *charTexture = CCSprite::create(textureName.c_str());
CCSize charSize = charTexture->getContentSize();
selectedObject = new PhysicsSprite();
selectedObject->initWithTexture(charTexture->getTexture(), CCRectMake(0, 0, charSize.width, charSize.height));
CCPoint p = ccp(240, 180);
// Define the dynamic body.
//Set up a 1m squared box in the physics world
b2BodyDef bodyDef;
bodyDef.type = b2_dynamicBody;
bodyDef.position.Set(p.x/PTM_RATIO, p.y/PTM_RATIO);
b2Body *body = world->CreateBody(&bodyDef);
b2PolygonShape dynamicBox;
dynamicBox.SetAsBox(charSize.width/PTM_RATIO/2, charSize.height/PTM_RATIO/2);
// Define the dynamic body fixture.
b2FixtureDef fixtureDef;
fixtureDef.shape = &dynamicBox;
fixtureDef.density = 0.5f;
fixtureDef.friction = 0.2f;
body->CreateFixture(&fixtureDef);
selectedObject->setPhysicsBody(body);
addChild(selectedObject);
}
void HelloWorld::createBox2DWorld()
{
// create world
b2Vec2 gravity;
gravity.Set(0.0f, -10.0f);
world = new b2World(gravity);
world->SetAllowSleeping(true);
world->SetContinuousPhysics(true);
// m_debugDraw = new GLESDebugDraw( PTM_RATIO );
// world->SetDebugDraw(m_debugDraw);
uint32 flags = 0;
flags += b2Draw::e_shapeBit;
// flags += b2Draw::e_jointBit;
// flags += b2Draw::e_aabbBit;
// flags += b2Draw::e_pairBit;
// flags += b2Draw::e_centerOfMassBit;
//m_debugDraw->SetFlags(flags);
// Define the ground body.
b2BodyDef groundBodyDef;
groundBodyDef.position.Set(0, 0); // bottom-left corner
// Call the body factory which allocates memory for the ground body
// from a pool and creates the ground box shape (also from a pool).
// The body is also added to the world.
b2Body* groundBody = world->CreateBody(&groundBodyDef);
// Define the ground box shape.
b2EdgeShape groundBox;
// bottom
groundBox.Set(b2Vec2(VisibleRect::leftBottom().x/PTM_RATIO,VisibleRect::leftBottom().y/PTM_RATIO), b2Vec2(VisibleRect::rightBottom().x/PTM_RATIO,VisibleRect::rightBottom().y/PTM_RATIO));
groundBody->CreateFixture(&groundBox,0);
/*
// top
groundBox.Set(b2Vec2(VisibleRect::leftTop().x/PTM_RATIO,VisibleRect::leftTop().y/PTM_RATIO), b2Vec2(VisibleRect::rightTop().x/PTM_RATIO,VisibleRect::rightTop().y/PTM_RATIO));
groundBody->CreateFixture(&groundBox,0);
// left
groundBox.Set(b2Vec2(VisibleRect::leftTop().x/PTM_RATIO,VisibleRect::leftTop().y/PTM_RATIO), b2Vec2(VisibleRect::leftBottom().x/PTM_RATIO,VisibleRect::leftBottom().y/PTM_RATIO));
groundBody->CreateFixture(&groundBox,0);
// right
groundBox.Set(b2Vec2(VisibleRect::rightBottom().x/PTM_RATIO,VisibleRect::rightBottom().y/PTM_RATIO), b2Vec2(VisibleRect::rightTop().x/PTM_RATIO,VisibleRect::rightTop().y/PTM_RATIO));
groundBody->CreateFixture(&groundBox,0);
*/
// create contact listener
contactListener = new ContactListener();
world->SetContactListener(contactListener);
}
void HelloWorld::updateBox2DWorld(float dt)
{
CCLOG("BODY2D COUNT: %i", world->GetBodyCount());
int velocityIterations = 8;
int positionIterations = 1;
world->Step(dt, velocityIterations, positionIterations);
for(b2Body *b = world->GetBodyList(); b; b=b->GetNext())
{
if (b->GetUserData() != NULL)
{
CCSprite *entity = (CCSprite*)b->GetUserData();
CCPoint Pos = entity->getPosition();
b2Vec2 b2Position = b2Vec2(Pos.x/PTM_RATIO, Pos.y/PTM_RATIO);
float32 b2Angle = -1 * CC_DEGREES_TO_RADIANS(entity->getRotation());
b->SetTransform(b2Position, b2Angle);
}
}
std::vectortoDestroy;
std::vector::iterator pos;
for(pos = contactListener->_contacts.begin(); pos != contactListener->_contacts.end(); ++pos)
{
ContactData contact = *pos;
// Get the box2d bodies for each object
b2Body *bodyA = contact.fixtureA->GetBody();
b2Body *bodyB = contact.fixtureB->GetBody();
if (bodyA->GetUserData() != NULL && bodyB->GetUserData() != NULL)
{
//CCSprite *spriteA = (CCSprite*)bodyA->GetUserData();
//CCSprite *spriteB = (CCSprite*)bodyB->GetUserData();
//int iTagA = spriteA->getTag();
//int iTagB = spriteB->getTag();
// Is sprite A a cat and sprite B a car? If so, push the cat on a list to be destroyed...
/*
if (iTagA == 1 && iTagB == 2)
toDestroy.push_back(bodyA);
// Is sprite A a car and sprite B a cat? If so, push the cat on a list to be destroyed...
else if (iTagA == 2 && iTagB == 1)
toDestroy.push_back(bodyB);
or
if (iTagA == GameObjects::TAG_PLAYER && iTagB == GameObjects::TAG_COIN)
{
Coin *coin = (Coin*)spriteB;
GameObjects::points += coin->getPoints();
updatePoints();
toDestroy.push_back(bodyB);
}
*/
}
}
// Loop through all of the box2d bodies we wnat to destroy...
std::vector::iterator pos2;
for(pos2 = toDestroy.begin(); pos2 != toDestroy.end(); ++pos2)
{
b2Body *body = *pos2;
// See if there's any user data attached to the Box2D body
// There should be, since we set it in addBoxBodyForSprite
if (body->GetUserData() != NULL)
{
// We know that the user data is a sprite since we set
// it that way, so cast it...
CCSprite *entity = (CCSprite*)body->GetUserData();
removeChild(entity, true);
// Remove the sprite from the scene
//[_spriteSheet removeChild:sprite cleanup:YES];
//sprite->removeFromParentAndCleanup(true);
//m_spriteSheet->removeChild( sprite, true );
}
// Destroy the Box2D body as well
world->DestroyBody(body);
}
// If we've destroyed anything, play an amusing and malicious sound effect! ;]
if (toDestroy.size() > 0)
{
//CocosDenshion::SimpleAudioEngine::sharedEngine()->playEffect( "cat_ouch.wav" );
}
}
void HelloWorld::createBox2DBodyForSprite(CCSprite *entity, int iNumVerts, b2Vec2 verts[])
{
if(world==NULL)
{
return;
}
CCPoint pos = entity->getPosition();
CCSize size = entity->getContentSize();
b2BodyDef spriteBodyDef;
spriteBodyDef.type = b2_dynamicBody;
spriteBodyDef.position.Set(pos.x/PTM_RATIO, pos.y/PTM_RATIO);
spriteBodyDef.userData = entity;
b2Body *spriteBody = world->CreateBody(&spriteBodyDef);
b2PolygonShape spriteShape;
if( iNumVerts!=0 )
{
spriteShape.Set(verts, iNumVerts);
b2FixtureDef spriteShapeDef;
spriteShapeDef.shape = &spriteShape;
spriteShapeDef.density = 10.0;
spriteShapeDef.isSensor = false;
spriteBody->CreateFixture(&spriteShapeDef);
}
else
{
// No Vertice supplied so just make a box round the sprite
b2BodyDef spriteBodyDef;
spriteBodyDef.type = b2_dynamicBody;
spriteBodyDef.position.Set( pos.x/PTM_RATIO, pos.y/PTM_RATIO );
spriteBodyDef.userData = entity;
b2Body *spriteBody = world->CreateBody( &spriteBodyDef );
b2PolygonShape spriteShape;
spriteShape.SetAsBox( size.width/PTM_RATIO/2, size.height/PTM_RATIO/2 );
b2FixtureDef spriteShapeDef;
spriteShapeDef.shape = &spriteShape;
spriteShapeDef.density = 10.0;
spriteShapeDef.isSensor = true; // isSensor true when you want to know when objects will collide without triggering a box2d collision response
spriteBody->CreateFixture( &spriteShapeDef );
}
}
void HelloWorld::update(float dt)
{
CCLOG("UPDATE GAME");
updateBox2DWorld(dt);
updateCamera(dt);
}
void HelloWorld::updateCamera(float dt)
{
CCLOG("UPDATE CAMERA");
if (selectedObject)
{
//cameraObject->setPosition(selectedObject->getBodyPosition());
//cameraObject->setPosition(selectedObject->getBodyPosition());
}
CCMoveTo* action = CCMoveTo::create(1.0f, ccpMult(selectedObject->getBodyPosition(), -1));
runAction(action);
//setPosition(selectedObject->getBodyPosition());
/*
CCFollow* actionFollow = CCFollow::create(selectedObject, CCRect::CCRect(0.0f, 0.0f, 20000.0f, 20000.0f));
runAction(actionFollow);
*/
/*
stopAllActions();
CCPoint position = CCPoint(selectedObject->getPhysicsBody()->GetPosition().x * PTM_RATIO, selectedObject->getPhysicsBody()->GetPosition().y * PTM_RATIO);
CCNode *node = CCNode::create();
node->setPosition(position);
CCFollow* pFollowA = CCFollow::create(node, CCRect::CCRect(0.0f, 0.0f, 2000, CCDirector::sharedDirector()->getWinSizeInPixels().height));
runAction(pFollowA);
*/
/*
// Bullet is moving.
if (m_bulletBody && m_bulletJoint == NULL)
{
b2Vec2 position = m_bulletBody->GetPosition();
CCPoint myPosition = this->getPosition();
CCSize screenSize = CCDirector::sharedDirector()->getWinSize();
// Move the camera.
if (position.x > screenSize.width / 2.0f / PTM_RATIO)
{
myPosition.x = -MIN(screenSize.width * 2.0f - screenSize.width, position.x * PTM_RATIO - screenSize.width / 2.0f);
this->setPosition(myPosition);
*/
//b2Vec2 myPositionB = char1Sprite->getPhysicsBody()->GetPosition();
//CCPoint myPosition = CCPoint(myPositionB.x * PTM_RATIO, myPositionB.y * PTM_RATIO);
//setPosition(myPosition);
}