PCurve - Curve on Surface eryar@163.com Abstract. 本文通过给出曲面上曲线PCurve的定义来对OpenCascade中的Curve On Surface进行理解,并介绍了OpenCascade对应的类BRep_CurveOnSurface实现.通过Tcl脚本输出的球的拓朴信息,分析PCurve的实际应用. Key words. OpenCascade, ACIS, PCurve, Curve on Surface, Parametric Surf…

平滑函数(smooth function): curve:曲线: 二维平面: surface:曲面: 三维空间: hypersurface:超曲面: 更高维度: 1. surface 是对平面的泛化,不必像平面(plane)那样,曲率(curvature)为 0. 关于曲率及其计算请见:微积分 -- 曲率与曲率半径 单位球,就是一个surface: x2+y2+z2−1=0…

OpenCASCADE PCurve of Topological Face eryar@163.com Abstract. OpenCASCADE provides a class BRepBuilderAPI_MakeFace to build topological faces. A face maybe built from a surface, elementary surface from gp package, surface from Geom, from a wire and…

OpenCASCADE Make Primitives-Sphere eryar@163.com Abstract. The sphere is the simplest topology shape of the BRep structure. But there are several import concept of the sphere edges, such as degenerated edge and seam edge. So construct a sphere by cod…

OpenCascade Primitives BRep - Sphere eryar@163.com Abstract. BRep is short for Boundary Representation. Boundary Representation gives a complete description of an object by associating topological and geometric information for solid modeling. In this…

OpenCascade Primitives BRep - Box eryar@163.com Abstract. BRep is short for Boundary Representation. Boundary Representation gives a complete description of an object by associating topological and geometric information for solid modeling. In this ca…

Make Helix Curve in OpenCASCADE eryar@163.com Abstract. OpenCASCADE does not provide helix curve directly, but you can build a helix curve by the pcurve of a surface(curve on surface). When you understand the pcurve of a surface, you can make a helix…

OPEN CASCADE BSpline Curve Interpolation eryar@163.com Abstract. Global curve interpolation to point data is a way to construct curves. The paper focus on the interpolate algorithm in OPEN CASCADE, and give a simple example to demonstrate the usage o…

OpenCascade Primitives BRep-Cylinder eryar@163.com Abstract. BRep is short for Boundary Representation. Boundary Representation gives a complete description of an object by associating topological and geometric information for solid modeling. In this…

Topology Shapes of OpenCascade BRep eryar@163.com 摘要Abstract:通过对OpenCascade中的BRep数据的读写,理解边界表示法的概念及实现.理解了拓朴形状的数据结构,就对ModelingData模块有了清晰认识,方便OpenCascade其他模块如ModelingAlgorithms和Visiualization模块的理解. 关键字Key Words:OpenCascade, BRep, Topology, BRep Format 一…