A ruled surface of revolution formed by an edged circle as the guide element is proposed in the category of basic geometrical bodies 摘要在基本几何体的范畴内，提出一种以棱圆为导元素的直纹曲面。
In this paper , the objects that we research are spatial geometry in three - dimensional euclidean space . the definitions of spatial objects conform to opengis specification 本文的研究以三维空间几何体为研究对象，空间对象的定义符合opengis规范的要求。
The screw geometry uses standard rather than feature - based displacement mapping because it is faster in situations where displacement is driven by an expression 螺纹的几何体使用基本的强于特别基于置换贴图，因为当置换被一个表达式驱动时它是比模拟这个效果要快。
Partial coincidence . unable to split solid . try moving the splitting plane . non - manifold condition . unable to split solid . try moving the splitting plane 出现以下错误时，几何体几乎与分割平面重合。向远离重合数据的方向略微移动平面通常会解决此问题。状态行将指明有错的分割平面。
Abstract : this paper mainly utilizes the methods of formula , isometric transform , cut and complement , extremes and analyzing special section to calculate the volume in solid geometry 摘要:文章探讨了用公式法、等体积变换法、割补法、极值法、分析特殊截面等方法求立体几何中几何体的体积。
In general , there are two types of ffds : deformation with a lattice and deformation with constraints . we present an approach to deform arbitrary meshes based on geometric primitives 另一类是基于“约束”的，约束可以是一个空间的点、线、面或几何体，求解满足给定约束偏移的物体形变。
Measurements can be carried out with plate - plate or cone - plate geometries , e . g . on polymer melts ; further , measurements on solid bars ( dmta ) and thin films or fibres ( extension ) are possible 使用板-板或椎-板几何体系统都能执行测量，如聚合物熔体；此外，固体棒（ dmta ）和薄膜或纤维（拉伸）的测量都可以进行。
The moulding process of the cutter has been accomplished by fitting the geometric elements together in the opposite direction of function decomposition , which greatly improve the efficiency and quality of the design 然后按照功能分解的反方向对各几何体素进行拼合完成刀具的造型过程，从而大大提高了成形刀具的设计效率和设计质量。
The desired signals of point targets , point array targets and three - dimensional targets are simulated and analyzed respectively . the simulating results show that the methods proposed can estimate correctly the sar characteristics 最后给出了一个人造三维几何体的模拟图像,并对阴影效果进行了模拟,经过分析该阴影与实际情况相符。
Since displacement mapping is applied to the geometry of a surface , rather than to its shading , the normals of a displaced surface must be perturbed in tandem with the actual displacement in order for things to look correct in the render 因为置换贴图是赋予到一个表面的几何体上，强于赋到它的材质上，显示表面的法线必须用实际的置换来扰乱，为了在渲染时校正正确的外观。
