Bezier parametric patches are used in engineering practice quite often, especially in CAD/CAM systems oriented to mechanical design. In many cases quadrilateral meshes are used for tessellation of parameters domain. We propose a new modification of the Bezier cubic rectangular patch, the BS-patch, which is based on the requirement that diagonal curves must be of degree 3 instead of degree 6 as it is in the case of the Bezier patch. Theoretical derivation of conditions is presented and some experimental results as well. The BS-Patch is convenient for applications where for different tessellation of the u-v domain different degrees of diagonal curves are not acceptable.

翻译：在工程实践中经常使用贝塞尔参数补丁,特别是在面向机械设计的CAD/CAM系统中,在许多情况下,四边环斑用于参数域的星系。我们提议对贝塞尔立方矩形补丁(BS-patch)进行新的修改,其依据要求是,对角曲线必须是三级,而不是贝塞尔补丁情况下的六级。对条件的理论推导和一些实验结果也作了介绍。BS-Patch对于对u-v域不同程度的对二角曲线不同系系系系系不可以接受的应用来说是方便的。