均匀B样条曲面生成及显示软件包的设计

A Software Design For UniformBSpline Surface In Generating and Displaying

以局部参数表示的均匀Ｂ样条曲面矩阵为基础，利用空间网格点的矢量坐标及参数增量ｄｕ和ｄｗ在参数平面ｕ和ｗ方向上自动计算相邻曲面上诸点并自动连线，经过透视变换，显示出曲面ｕ和ｗ参数方向的网格透视图；调整特征网格点的位置可改变曲面的形状．该软件包满足工程外形设计用曲面的需要，并且调整透视变换参数可控制该曲面的显示效果．

Based on array presentation of BSpline surface in local Parameter and array of feature mesh, a serials of isoparametric curves in both u&v direction in Uniform BSpline Surface are developed and transfe red into perspective projection; Giving varies of perspective parameters, the displaying of the surface is controlled. This paper supplies a small software which can meet the needs of designing outer shapes of industrial products.