axmol/template/xcode4/cocos2dx_box2d.xctemplate/Classes/HelloWorldScene.cpp

//
//  HelloWorldScene.cpp
//  ___PROJECTNAME___
//
//  Created by ___FULLUSERNAME___ on ___DATE___.
//  Copyright ___ORGANIZATIONNAME___ ___YEAR___. All rights reserved.
//
#include "HelloWorldScene.h"
#include "SimpleAudioEngine.h"

using namespace cocos2d;
using namespace CocosDenshion;

#define PTM_RATIO 32
enum 
{
	kTagTileMap = 1,
	kTagSpriteManager = 1,
	kTagAnimation1 = 1,
}; 

HelloWorld::HelloWorld()
{
	setIsTouchEnabled( true );
	setIsAccelerometerEnabled( true );
    
	CCSize screenSize = CCDirector::sharedDirector()->getWinSize();
	//UXLOG(L"Screen width %0.2f screen height %0.2f",screenSize.width,screenSize.height);
    
	// Define the gravity vector.
	b2Vec2 gravity;
	gravity.Set(0.0f, -10.0f);
	
	// Do we want to let bodies sleep?
	bool doSleep = true;
    
	// Construct a world object, which will hold and simulate the rigid bodies.
	world = new b2World(gravity, doSleep);
    
	world->SetContinuousPhysics(true);
    
    /*	
     m_debugDraw = new GLESDebugDraw( PTM_RATIO );
     world->SetDebugDraw(m_debugDraw);
     
     uint flags = 0;
     flags += b2DebugDraw::e_shapeBit;
     flags += b2DebugDraw::e_jointBit;
     flags += b2DebugDraw::e_aabbBit;
     flags += b2DebugDraw::e_pairBit;
     flags += b2DebugDraw::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.
	b2PolygonShape groundBox;		
	
	// bottom
	groundBox.SetAsEdge(b2Vec2(0,0), b2Vec2(screenSize.width/PTM_RATIO,0));
	groundBody->CreateFixture(&groundBox, 0);
	
	// top
	groundBox.SetAsEdge(b2Vec2(0,screenSize.height/PTM_RATIO), b2Vec2(screenSize.width/PTM_RATIO,screenSize.height/PTM_RATIO));
	groundBody->CreateFixture(&groundBox, 0);
	
	// left
	groundBox.SetAsEdge(b2Vec2(0,screenSize.height/PTM_RATIO), b2Vec2(0,0));
	groundBody->CreateFixture(&groundBox, 0);
	
	// right
	groundBox.SetAsEdge(b2Vec2(screenSize.width/PTM_RATIO,screenSize.height/PTM_RATIO), b2Vec2(screenSize.width/PTM_RATIO,0));
	groundBody->CreateFixture(&groundBox, 0);
    
	
	//Set up sprite
	
	CCSpriteBatchNode *mgr = CCSpriteBatchNode::batchNodeWithFile("blocks.png", 150);
	addChild(mgr, 0, kTagSpriteManager);
	
	addNewSpriteWithCoords( CCPointMake(screenSize.width/2, screenSize.height/2) );
	
	CCLabelTTF *label = CCLabelTTF::labelWithString("Tap screen", "Marker Felt", 32);
	addChild(label, 0);
	label->setColor( ccc3(0,0,255) );
	label->setPosition( CCPointMake( screenSize.width/2, screenSize.height-50) );
	
	schedule( schedule_selector(HelloWorld::tick) );
}

HelloWorld::~HelloWorld()
{
	delete world;
	world = NULL;
	
	//delete m_debugDraw;
}

void HelloWorld::draw()
{
	// Default GL states: GL_TEXTURE_2D, GL_VERTEX_ARRAY, GL_COLOR_ARRAY, GL_TEXTURE_COORD_ARRAY
	// Needed states:  GL_VERTEX_ARRAY, 
	// Unneeded states: GL_TEXTURE_2D, GL_COLOR_ARRAY, GL_TEXTURE_COORD_ARRAY
	glDisable(GL_TEXTURE_2D);
	glDisableClientState(GL_COLOR_ARRAY);
	glDisableClientState(GL_TEXTURE_COORD_ARRAY);
	
	//world->DrawDebugData();
	
	// restore default GL states
	glEnable(GL_TEXTURE_2D);
	glEnableClientState(GL_COLOR_ARRAY);
	glEnableClientState(GL_TEXTURE_COORD_ARRAY);	
}

void HelloWorld::addNewSpriteWithCoords(CCPoint p)
{
	//UXLOG(L"Add sprite %0.2f x %02.f",p.x,p.y);
	CCSpriteBatchNode* sheet = (CCSpriteBatchNode*)getChildByTag(kTagSpriteManager);
	
	//We have a 64x64 sprite sheet with 4 different 32x32 images.  The following code is
	//just randomly picking one of the images
	int idx = (CCRANDOM_0_1() > .5 ? 0:1);
	int idy = (CCRANDOM_0_1() > .5 ? 0:1);
    
	CCSprite *sprite = CCSprite::spriteWithBatchNode(sheet, CCRectMake(32 * idx,32 * idy,32,32));
	sheet->addChild(sprite);
	
	sprite->setPosition( CCPointMake( p.x, p.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);
	bodyDef.userData = sprite;
	b2Body *body = world->CreateBody(&bodyDef);
	
	// Define another box shape for our dynamic body.
	b2PolygonShape dynamicBox;
	dynamicBox.SetAsBox(.5f, .5f);//These are mid points for our 1m box
	
	// Define the dynamic body fixture.
	b2FixtureDef fixtureDef;
	fixtureDef.shape = &dynamicBox;	
	fixtureDef.density = 1.0f;
	fixtureDef.friction = 0.3f;
	body->CreateFixture(&fixtureDef);
}


void HelloWorld::tick(ccTime dt)
{
	//It is recommended that a fixed time step is used with Box2D for stability
	//of the simulation, however, we are using a variable time step here.
	//You need to make an informed choice, the following URL is useful
	//http://gafferongames.com/game-physics/fix-your-timestep/
	
	int velocityIterations = 8;
	int positionIterations = 1;
    
	// Instruct the world to perform a single step of simulation. It is
	// generally best to keep the time step and iterations fixed.
	world->Step(dt, velocityIterations, positionIterations);
	
	//Iterate over the bodies in the physics world
	for (b2Body* b = world->GetBodyList(); b; b = b->GetNext())
	{
		if (b->GetUserData() != NULL) {
			//Synchronize the AtlasSprites position and rotation with the corresponding body
			CCSprite* myActor = (CCSprite*)b->GetUserData();
			myActor->setPosition( CCPointMake( b->GetPosition().x * PTM_RATIO, b->GetPosition().y * PTM_RATIO) );
			myActor->setRotation( -1 * CC_RADIANS_TO_DEGREES(b->GetAngle()) );
		}	
	}
}

void HelloWorld::ccTouchesEnded(CCSet* touches, CCEvent* event)
{
	//Add a new body/atlas sprite at the touched location
	CCSetIterator it;
	CCTouch* touch;
    
	for( it = touches->begin(); it != touches->end(); it++) 
	{
		touch = (CCTouch*)(*it);
        
		if(!touch)
			break;
        
		CCPoint location = touch->locationInView(touch->view());
		
		location = CCDirector::sharedDirector()->convertToGL(location);
        
		addNewSpriteWithCoords( location );
	}
}

CCScene* HelloWorld::scene()
{
    // 'scene' is an autorelease object
    CCScene *scene = CCScene::node();
    
    // add layer as a child to scene
    CCLayer* layer = new HelloWorld();
    scene->addChild(layer);
    layer->release();
    
    return scene;
}