下载示例代码voidPlanetSystem::initSystem(){//PlanetNode(公转半径，公转速度，自身半径，自转速度，颜色)rootPlanet=newPlanetNode(0,0.0f,40,1.5f,QColor(255,0,0));PlanetNode*p0=newPlanetNode(100,1.5f,15,1.5f,QColor(255,255,0));