Abstract
A streaming method of multi-level design features for a three-dimensional model CAD drawing file includes: take each design feature of the three-dimensional model as the smallest unit, perform level definition for the content of the three-dimensional model; construct a feature level decomposition data structure for the aforementioned level definition flow; establish a switch mechanism for the features so as to control whether to display each design feature of the three-dimensional model; according to the user's setting, wrap the assigned design feature as a packet, thereby achieving multi-way real-time gradual type streaming transmission, so as to realize streaming transmission in peer-to-peer product information sharing operations, not only enabling each coordinating participator to receive product data of other individuals in order to obtain higher level product data, but also allowing the product data to be shared with other individuals and thus promote overall information sharing efficiency.