Use of debugDraw in Cocos2d-x

1. Find the document: cocos2d-x and GLES-Render.h in the corresponding GLES-Render.cpp inventory
Copy them to your project and reference them;

2. Add these when creating the world

GLESDebugDraw * _ debugDraw = new GLESDebugDraw (PTM_RATIO );
World-> 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-> SetFlags (flags );

3. Add or modify the draw Method

Void PlayLayer: draw ()
{
//
// IMPORTANT:
// This is only for debug purposes
// It is recommend to disable it
CCLayer: draw ();

Ccglablevertexattribs (kCCVertexAttribFlag_Position );

KmGLPushMatrix ();

World-> DrawDebugData ();

KmGLPopMatrix ();

CHECK_GL_ERROR_DEBUG ();
}

4. Do not set the background color or the image to keep the background black during debugging. Otherwise, it will be hard to see the deug box.