coco2d-x 中box2d选中刚体

来源：互联网发布：怎么检查dns linux 编辑：程序博客网时间：2024/05/17 03:54

普通的选中这里就不说了,box2d中提供了，一个比较效率比较高的快速选中类，那就是b2QueryCallback

#ifndef QueryCallback_H#define QueryCallback_H#include <Box2D/Box2D.h>class QueryCallback :public b2QueryCallback{public:QueryCallback(void);QueryCallback(const b2Vec2& point);~QueryCallback(void);bool ReportFixture(b2Fixture* fixture);b2Vec2 m_point;b2Fixture* m_fixture;std::vector<b2Fixture*> m_vectFixture;};#endif

#include "QueryCallback.h"QueryCallback::QueryCallback(void){}QueryCallback::QueryCallback(const b2Vec2& point){m_point = point;m_fixture = NULL;}QueryCallback::~QueryCallback(void){}bool QueryCallback::ReportFixture(b2Fixture* fixture){b2Body* body = fixture->GetBody();if (body->GetType() == b2_dynamicBody){bool inside = fixture->TestPoint(m_point);if (inside){m_fixture = fixture;m_vectFixture.push_back(fixture);// We are done, terminate the query.return true;}}// Continue the query.return true;}

通过这个类就可以快速的选中某个刚体回调，效率也比较高

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