基于OpenCASCADE的虚拟三维建模平台的开发 OpenCASCADE几何内核进行三维实体建模，最终实现了独立建模、复杂布尔操作的虚拟三维建模平台的开发 -Virtual three-dimensional modeling based on OpenCASCADE Platform OpenCASCADE three-dimensional geometric modeling kernel, and ultimately independent modeling