All these measure along with propagation analysis of constraints established the theory and quick solution of geometric constraint engine.
通过约束传播分析，为几何约束求解引擎的实现提供了理论依据和快速算法。
ACIS is a prominent 3d modeling engine, which integrating wireframe, surface, and solid modeling in itself, supplies a geometric modeling platform for different 3d modeling applications.
ACIS是一种三维几何造型引擎，它集线框、曲面和实体造型于一体，为各种3d造型应用的开发提供了几何造型平台。
Further discussions on the effect of the geometric condition of the vessel-pipe boundary on the engine performance were made.
文中还对容器边界几何状况对于柴油机性能参数的影响进行了讨论。
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