cocos2dx 画包围盒
virtual void draw(Renderer *renderer, const Mat4& transform, uint32_t flags);
DrawNode* m_pDrawNode = nullptr;
m_pDrawNode->clear();
m_pDrawNode->drawLine(Vec2(box.x1_, box.y1_), Vec2(box.x2_, box.y2_), Color4F::GREEN);
m_pDrawNode->drawLine(Vec2(box.x2_, box.y2_), Vec2(box.x3_, box.y3_), Color4F::GREEN);
m_pDrawNode->drawLine(Vec2(box.x3_, box.y3_), Vec2(box.x4_, box.y4_), Color4F::GREEN);
m_pDrawNode->drawLine(Vec2(box.x4_, box.y4_), Vec2(box.x1_, box.y1_), Color4F::GREEN);