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    <p>In <code>android.mk</code> you have to add <code>GLESDebugDraw.cpp</code> and also include <code>GLESDebugDraw.h</code> in your .cpp file where you are using it.</p> <p>If you want to debug draw then you have to write only these line in the your draw method</p> <pre><code>CCLayer::draw(); ccGLEnableVertexAttribs( kCCVertexAttribFlag_Position ); kmGLPushMatrix(); world-&gt;DrawDebugData(); kmGLPopMatrix(); </code></pre> <p>In your init method or constructor</p> <pre><code>debugDraw = new GLESDebugDraw(PTM_RATIO); world-&gt;SetDebugDraw(debugDraw); uint32 flags = 0; flags += b2Draw::e_shapeBit; // flags += b2Draw::e_jointBit; /*flags += b2Draw::e_aabbBit; flags += b2Draw::e_pairBit; flags += b2Draw::e_centerOfMassBit;*/ debugDraw-&gt;SetFlags(flags); </code></pre> <p>Try this, This is my init method............</p> <pre><code> bool HelloWorld::init() { ////////////////////////////// // 1. super init first if ( !CCLayer::init() ) { return false; } this-&gt;setTouchEnabled(true); CCSize visibleSize = CCDirector::sharedDirector()-&gt;getVisibleSize(); CCPoint origin = CCDirector::sharedDirector()-&gt;getVisibleOrigin(); array2-&gt;createWithCapacity(4); b2Vec2 gravity; gravity.Set(0.0f, -10.0f); _world = new b2World(gravity); _world-&gt;SetContactListener(this); // Do we want to let bodies sleep? _world-&gt;SetAllowSleeping(false); _world-&gt;SetContinuousPhysics(true); _debugDraw = new GLESDebugDraw(PTM_RATIO); _world-&gt;SetDebugDraw(_debugDraw); uint32 flags = 0; flags += b2Draw::e_shapeBit; // flags += b2Draw::e_jointBit; // flags += b2Draw::e_aabbBit; // flags += b2Draw::e_pairBit; // flags += b2Draw::e_centerOfMassBit; _debugDraw-&gt;SetFlags(flags); ///////////////////////////// // 2. add a menu item with "X" image, which is clicked to quit the program // you may modify it. // add a "close" icon to exit the progress. it's an autorelease object CCMenuItemImage *pCloseItem = CCMenuItemImage::create( "CloseNormal.png", "CloseSelected.png", this, menu_selector(HelloWorld::menuCloseCallback)); pCloseItem-&gt;setPosition(ccp(origin.x + visibleSize.width - pCloseItem-&gt;getContentSize().width/2 , origin.y + pCloseItem-&gt;getContentSize().height/2)); // create menu, it's an autorelease object CCMenu* pMenu = CCMenu::create(pCloseItem, NULL); pMenu-&gt;setPosition(CCPointZero); this-&gt;addChild(pMenu, 1); ///////////////////////////// // 3. add your codes below... // add a label shows "Hello World" // create and initialize a label CCLabelTTF* pLabel = CCLabelTTF::create("Hello World", "Arial", 24); // position the label on the center of the screen pLabel-&gt;setPosition(ccp(origin.x + visibleSize.width/2, origin.y + visibleSize.height - pLabel-&gt;getContentSize().height)); // add the label as a child to this layer this-&gt;addChild(pLabel, 1); // add "HelloWorld" splash screen" CCSprite* pSprite = CCSprite::create("HelloWorld.png"); // position the sprite on the center of the screen pSprite-&gt;setPosition(ccp(visibleSize.width/2 + origin.x, visibleSize.height/2 + origin.y)); // add the sprite as a child to this layer // this-&gt;addChild(pSprite, 0); plbdy(); schedule(SEL_SCHEDULE(&amp;HelloWorld::update), 0); return true; } </code></pre> <p>This is my <code>plbdy()</code> </p> <pre><code>plbdy() { b2BodyDef bdf ; bdf.type = b2_dynamicBody; b2PolygonShape shape; shape.SetAsBox(1,1); b2FixtureDef fd; fd.shape = &amp;shape; fd.density = 1; b2Body hero = _world-&gt;CreateBody(&amp;bdf2); hero-&gt;CreateFixture(&amp;fd); } </code></pre> <p>And This is my Box2d update method to update world</p> <pre><code>update(float dt) { int velocityIterations = 8; int positionIterations = 1; _world-&gt;Step(dt, velocityIterations, positionIterations); } </code></pre> <p>'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''</p> <pre><code>Try these make a simple body nothing more and then check body is created or not </code></pre>
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    1. COi have not included the GLES_Render.cpp in my andorid.mk, after i included that the "GLESDebugDraw" error related to PTM_RATIO is refined. but i didnt get the object on the screen
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    2. CO#define PTM_RATIO 40 use this
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    3. COstill it is not showing
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