body->CreateFixture(&BoxDef)
我在windows中使用cocos2d-x 2.1.5和Box2d 2.2.1
CCSprite *sprite = CCSprite::create(imagename.c_str()); this->addChild(sprite,1); b2BodyDef bodyDef; bodyDef.type = isstatic?b2_staticBody:b2_dynamicBody; bodyDef.position.Set((position.x+sprite->getContentSize().wIDth/2.0f)/PTM_RATIO,(position.y+sprite->getContentSize().height/2.0f)/PTM_RATIO); bodyDef.angle = CC_degrees_TO_radians(rotation); bodyDef.userData = sprite; b2Body *body = world->CreateBody(&bodyDef); b2FixtureDef BoxDef; if (isCircle) { b2CircleShape circle; circle.m_radius = sprite->getContentSize().wIDth/2.0f/PTM_RATIO; BoxDef.shape = &circle; } else { b2polygonShape Box; Box.SetAsBox(sprite->getContentSize().wIDth/2.0f/PTM_RATIO,sprite->getContentSize().height/2.0f/PTM_RATIO); BoxDef.shape = &Box; } if (isEnemy) { BoxDef.userData = (voID*)1; enemIEs->insert(body); } BoxDef.density = 0.5f; body->CreateFixture(&BoxDef) //<-- HERE IS THE RUN TIME ERROR
;
当我调试Box2d代码即时到达b2Fixture.cpp
在方法中:
voID b2Fixture::Create(b2BlockAllocator* allocator,b2Body* body,const b2FixtureDef* def)
在线:
m_shape = def->shape->Clone(allocator);
得到运行时错误:
解决方法 棘手的一个.我自己碰到了几次.它与变量范围有关.R6025 pure virtual function call
BoxDef.shape是问题所在.您可以在if / else块中将形状创建为局部变量,然后将它们分配给BoxDef.一旦执行离开if / else块作用域,那么这些局部变量将是垃圾. BoxDef.shape现在指向释放的内存.
解决方案是通过在if / else块之前移动圆形和框形状声明来保持形状变量的范围.
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