【摘要】 为了解决协同装配中计算机辅助设计共享模型过大的问题,提出了一种简化共享模型的方法。根据设计人员角色的不同、所设计部件是否参与其他设计人员设计部件的装配,将共享模型分为重量级与轻量级两种粒度。与该设计人员进行协同装配无关的部件都简化为轻量级模型,轻量级模型只包含三角面片信息而没有几何元素信息、特征信息等,从而缩小了共享模型。在保持重量级模型信息完整性的条件下,用面边界与解析几何公式描述面信息。客户端在虚拟现实场景中重构了重量级共享模型外形。压缩后的模型占原模型的1/7~1/6。更多还原

【Abstract】 To solve the problem of big Computer Aided Design (CAD) sharing model in collaborative assembly, a method of model simplification was proposed. According to different roles played by designers, and whether their designed components would be assembled with components designed by others, the shared model was divided into detail representation and polygonized representation. The components, which had no relationship with collaborative assembly, were simplified to polygonized representation. Only the triangle facet information was recorded in polygonized representation, but no geometric object and feature information as in the detail representation, accordingly the size of shared model was reduced. In order to keep complete information of detail representation, the face edges and analytic geometry expressions were used to describe the face information. The new shape of detailed representation was reconstructed in the environment of Virtual Reality (VR) at client. The size of compressed model was only 1/7-1/6 of the original one.更多还原