用于解析PhysicsEditor生成的plist文件 ，支持cocos2d-x-2.1.5 亲测通过

GB2ShapeCache_x.h

#ifndef __CCSHAPECACHE_H__
#define __CCSHAPECACHE_H__
#include "cocos2d.h"
USING_NS_CC;
class BodyDef;
class b2Body;
namespace cocos2d {
class GB2ShapeCache : public CCObject{
public:
static GB2ShapeCache* sharedGB2ShapeCache(void);
public:
bool init();
void addShapesWithFile(const std::string &plist);
void addFixturesToBody(b2Body *body, const std::string &shape);
cocos2d::CCPoint anchorPointForShape(const std::string &shape);
void reset();
float getPtmRatio() { return ptmRatio; }
~GB2ShapeCache() {}
private:
std::map<std::string, BodyDef *> shapeObjects;
GB2ShapeCache(void) {}
float ptmRatio;
};
}
#endif /* defined(__CCSHAPECACHE_H__) */

GB2ShapeCache_x.cpp
#include "GB2ShapeCache_x.h"
#include "Box2D/Box2D.h"
#include "..\cocoa\CCNS.h"

using namespace cocos2d;

/**
* Internal class to hold the fixtures
*/
class FixtureDef {
public:
FixtureDef()
: next(NULL) {}

~FixtureDef() {
delete next;
delete fixture.shape;
}

FixtureDef *next;
b2FixtureDef fixture;
int callbackData;
};

class BodyDef {
public:
BodyDef()
: fixtures(NULL) {}

~BodyDef() {
if (fixtures)
delete fixtures;
}

FixtureDef *fixtures;
CCPoint anchorPoint;
};

static GB2ShapeCache *_sharedGB2ShapeCache = NULL;

GB2ShapeCache* GB2ShapeCache::sharedGB2ShapeCache(void) {
if (!_sharedGB2ShapeCache) {
_sharedGB2ShapeCache = new GB2ShapeCache();
_sharedGB2ShapeCache->init();
}

return _sharedGB2ShapeCache;
}

bool GB2ShapeCache::init() {
return true;
}

void GB2ShapeCache::reset() {
std::map<std::string, BodyDef *>::iterator iter;
for (iter = shapeObjects.begin() ; iter != shapeObjects.end() ; ++iter) {
delete iter->second;
}
shapeObjects.clear();
}

void GB2ShapeCache::addFixturesToBody(b2Body *body, const std::string &shape) {
std::map<std::string, BodyDef *>::iterator pos = shapeObjects.find(shape);
assert(pos != shapeObjects.end());

BodyDef *so = (*pos).second;

FixtureDef *fix = so->fixtures;
while (fix) {
body->CreateFixture(&fix->fixture);
fix = fix->next;
}
}

cocos2d::CCPoint GB2ShapeCache::anchorPointForShape(const std::string &shape) {
std::map<std::string, BodyDef *>::iterator pos = shapeObjects.find(shape);
assert(pos != shapeObjects.end());

BodyDef *bd = (*pos).second;
return bd->anchorPoint;
}

void GB2ShapeCache::addShapesWithFile(const std::string &plist) {

CCDictionary *dict = CCDictionary::createWithContentsOfFileThreadSafe(plist.c_str());
CCAssert(dict != NULL, "Shape-file not found"); // not triggered - cocos2dx delivers empty dict if non was found
CCAssert(dict->count() != 0, "plist file empty or not existing");

CCDictionary *metadataDict = (CCDictionary *)dict->objectForKey("metadata");
int format = static_cast<CCString *>(metadataDict->objectForKey("format"))->intValue();
ptmRatio = static_cast<CCString *>(metadataDict->objectForKey("ptm_ratio"))->floatValue();
CCAssert(format == 1, "Format not supported");

CCDictionary *bodyDict = (CCDictionary *)dict->objectForKey("bodies");

b2Vec2 vertices[b2_maxPolygonVertices];

CCDictElement* pElement = NULL;
CCDICT_FOREACH(bodyDict, pElement)
{
BodyDef *bodyDef = new BodyDef();

CCString *bodyName = ccs(pElement->getStrKey());

CCDictionary *bodyData = (CCDictionary *)pElement->getObject();
bodyDef->anchorPoint = CCPointFromString(static_cast<CCString *>(bodyData->objectForKey("anchorpoint"))->getCString());

CCArray *fixtureList = (CCArray *)bodyData->objectForKey("fixtures");
FixtureDef **nextFixtureDef = &(bodyDef->fixtures);

CCObject *fixture = NULL;
CCARRAY_FOREACH(fixtureList, fixture)
{

b2FixtureDef basicData;
CCDictionary *fixtureData = (CCDictionary *)fixture;
int callbackData = 0;

basicData.filter.categoryBits = static_cast<CCString *>(fixtureData->objectForKey("filter_categoryBits"))->intValue();
basicData.filter.maskBits = static_cast<CCString *>(fixtureData->objectForKey("filter_maskBits"))->intValue();
basicData.filter.groupIndex = static_cast<CCString *>(fixtureData->objectForKey("filter_groupIndex"))->intValue();
basicData.friction = static_cast<CCString *>(fixtureData->objectForKey("friction"))->floatValue();
basicData.density = static_cast<CCString *>(fixtureData->objectForKey("density"))->floatValue();
basicData.restitution = static_cast<CCString *>(fixtureData->objectForKey("restitution"))->floatValue();
basicData.isSensor = (bool)static_cast<CCString *>(fixtureData->objectForKey("isSensor"))->intValue();
if(fixtureData->objectForKey("id")){
basicData.userData = static_cast<CCString *>(fixtureData->objectForKey("id"));
callbackData = static_cast<CCString *>(fixtureData->objectForKey("id"))->intValue();
}

std::string fixtureType = static_cast<CCString *>(fixtureData->objectForKey("fixture_type"))->getCString();
//CCString *fixtureType = static_cast<CCString *>(fixtureData->objectForKey("fixture_type"))->getCString();

if (fixtureType == "POLYGON") {
//CCDictionary *polygons = (CCDictionary *)fixtureData->objectForKey("polygons");
CCArray *polygons = (CCArray *)fixtureData->objectForKey("polygons");
//CCDictElement *polygon = NULL;
CCObject *polygon = NULL;
//CCDICT_FOREACH(polygons, polygon)
CCARRAY_FOREACH(polygons, polygon)
{
FixtureDef *fix = new FixtureDef();
fix->fixture = basicData; // copy basic data
fix->callbackData = callbackData;

b2PolygonShape *polyshape = new b2PolygonShape();
int vindex = 0;

//CCDictionary *polygonData = (CCDictionary *)polygon->getObject();
CCArray *polygonData = (CCArray *)polygon;

assert(polygonData->count() <= b2_maxPolygonVertices);

//CCDictElement *offset = NULL;
CCObject *offset = NULL;
//CCDICT_FOREACH(polygonData, offset)
CCARRAY_FOREACH(polygonData, offset)
{

CCString *pStr = (CCString *)offset;
CCPoint p = CCPointFromString(pStr->getCString());

vertices[vindex].x = (p.x / ptmRatio) ;
vertices[vindex].y = (p.y / ptmRatio) ;
vindex++;

}

polyshape->Set(vertices, vindex);
fix->fixture.shape = polyshape;

*nextFixtureDef = fix;
nextFixtureDef = &(fix->next);
}

} else if (fixtureType == "CIRCLE") {
FixtureDef *fix = new FixtureDef();
fix->fixture = basicData; // copy basic data
fix->callbackData = callbackData;

CCDictionary *circleData = (CCDictionary *)fixtureData->objectForKey("circle");

b2CircleShape *circleShape = new b2CircleShape();

circleShape->m_radius = static_cast<CCString *>(circleData->objectForKey("radius"))->floatValue() / ptmRatio;
CCPoint p = CCPointFromString(static_cast<CCString *>(circleData->objectForKey("position"))->getCString());
circleShape->m_p = b2Vec2(p.x / ptmRatio, p.y / ptmRatio);
fix->fixture.shape = circleShape;

// create a list
*nextFixtureDef = fix;
nextFixtureDef = &(fix->next);

} else {
CCAssert(0, "Unknown fixtureType");
}

// add the body element to the hash
shapeObjects[bodyName->getCString()] = bodyDef;

}

}

}