OpenCASCADE Incremental Mesh eryar@163.com Abstract. OpenCASCADE IncrementalMesh is used to build the mesh of a shape with respect of their correctly triangulated parts. The blog focus on the deflection control of the algorithm. Key Words. Mesh, Visu

场景图形采用一种自顶向下的,分层的树状数据结构来组织空间数据集,以提高渲染的效率 场景图形树结构的顶部是一个根节点,从根节点向下延伸,各个组节点中均包含了几何信息和用于控制其外观的渲染状态信息.根节点和各个组节点都可以有零个(实际上是没有执行任何操作)或多个子成员.在场景图形的最底部,各个叶节点包含了构成场景中物体的实际几何信息. Osg程序使用组节点来组织和排列场景中的几何体. 场景图形通常包含了多种类型的节点以执行各种各样的用户功能,例如开关节点可以设置其子节点可用或不可用,细节层次节点(L

Over the years, I have collected, modified, adapted, adopted or created a number of software packages in FORTRAN. You might be able to use one of these libraries, or a routine or two from a library. The packages are at different levels of completion.

总体介绍: 倾斜摄影就是将拍好的数据,三角网格化再附上贴图. 目前流行处理软件: Street Factory.PIX4DMapper.smart3D 后期开发平台:超图 Skyline smart3D相关资源网址:http://www.acute3d.com/s3c-viewer/ 其他相关平台:LocaSpace Viewer osgb文件是保存倾斜摄影的基本数据格式 可以通过osgconv.exe直接转换成osgt格式查看内部构造 使用webgl的cesium需要将osgb格式转换成3dT

刚今天验收的实验,记录一下. 是比较基础的三维重建内容. 算是三维重建入门. 系统:windows 环境:visual studio 2013 语言:c++ 相关:OpenCV 2.Kinect SDK 2.0.PCL库 内容: 使用Kinect 2.0拍摄获取深度图,将彩色图与深度图配准生成点云: 然后每次拍摄得到的点云用ICP算法进行融合,形成完整点云(每次拍摄仅做微小偏移): 之后稍微对点云做了些许处理: 还添加了回档的功能: 声明: 有挺多借鉴博客与参考资料的,太多懒得写,假装忘了~ 原

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

Mesh Algorithm in OpenCascade eryar@163.com Abstract. Rendering a generic surface is a two steps process: first, computing the points that will form the mesh of the surface and then, send this mesh to 3D API. Use the Triangle to triangulate the param

OpenCASCADE Make Primitives-Box eryar@163.com Abstract. By making a simple box to demonstrate the BRep data structure of the OpenCASCADE. The construction method is different from BRepPrimAPI_MakeBox. In the paper construct the box from vertex, edge

OpenCASCADE BRep vs. OpenNURBS BRep eryar@163.com Abstract. BRep short for Boundary Representation. First give the definition of the BRep, then compare the BRep mode between OpenCASCADE and OpenNURBS. There are 3 main representation method: use face/

OpenCASCADE Conic to BSpline Curves-Circle eryar@163.com Abstract. The conic sections and circles play a fundamental role in CAD/CAM applications. Undoubtedly one of the greatest advantages of NURBS is their capability of precisely representing conic

Building OpenCASCADE on Debian eryar@163.com Abstract. When you are familiar with OpenCASCADE on Windows, you should try it on Linux operating system, because of Debian is also open source like OpenCASCADE. The paper is focus on how to building the O

OpenCASCADE Performance Test eryar@163.com Abstract. Use the Draw Test Harness to test the performance of OpenCASCADE by Tcl scripts. From the test result, you will check whether the OpenCASCADE meet your need. Key Words. OpenCASCADE, Performance Tes

OpenCascade B-Spline Basis Function eryar@163.com Abstract. B-splines are quite a bit more flexible than Bezier curves. This flexibility comes from the fact that you have much more control over the basis functions. For Bezier curves that each control

Delaunay Triangulation in OpenCascade eryar@163.com 摘要:本文简要介绍了Delaunay三角剖分的基础理论,并使用OpenCascade的三角剖分算法将边界BRep表示的几何体进行三角离散化后在OpenSceneGraph中显示. 关键字:Delaunay Triangulation.OpenCascade.OpenSceneGraph 一. 概述 三角剖分是平面剖分中的一个重要课题,在数字图像处理.计算机三维曲面造型.有限元计算.逆向工程等领

Mesh Data Structure in OpenCascade eryar@163.com 摘要Abstract:本文对网格数据结构作简要介绍,并结合使用OpenCascade中的数据结构,将网格数据在OpenSceneGraph中可视化. 关键字KeyWords:OpenCascade.OpenSceneGraph.Triangulation.Mesh Data Structure 一.引言 Introduction 三角网格就是全部由三角形组成的多边形网格.多边形和三角网格在图形学和建

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

Representation Data in OpenCascade BRep eryar@163.com 摘要Abstract:现在的显示器大多数是光栅显示器,即可以看做一个像素的矩阵.在光栅显示器上显示的任何图形,实际上都是一些具有一种或多种颜色的集合.数学上精确表示的图形在显示器中只能用逼近的方式显示出来.本文主要对OpenCascade的BRep文件中用来显示曲线和曲面的离散数据结构进行说明. 关键字:OpenCascade, BRep, Polygon, Triangulation,

在OpenSceneGraph中绘制OpenCascade的曲面 Render OpenCascade Geometry Surfaces in OpenSceneGraph eryar@163.com 摘要Abstract:本文对OpenCascade中的几何曲面数据进行简要说明,并结合OpenSceneGraph将这些曲面显示. 关键字Key Words:OpenCascade.OpenSceneGraph.Geometry Surface.NURBS 一.引言 Introduction <

OpenCascade Shape Representation in OpenSceneGraph eryar@163.com 摘要Abstract:本文通过程序实例,将OpenCascade中的拓朴数据(边.面)离散化后在OpenSceneGraph中进行显示.有了这些离散数据,就可以不用OpenCascade的显示模块了,可以使用其他显示引擎对形状进行显示.即若要线框模式显示形状时,就绘制离散形状拓朴边后得到的多段线:若要实体渲染模式显示形状时,就绘制离散形状拓朴面得到的三角网格.理解这些

Geometry Surface of OpenCascade BRep eryar@163.com 摘要Abstract:几何曲面是参数表示的曲面 ,在边界表示中其数据存在于BRep_TFace中,BRep_TFace中不仅包括了几何曲线,还包含用于显示的离散几何信息,如三角剖分数据.本文主要对OpenCascade的BRep表示中几何曲面进行说明,将在后面分析Topology部分的读写程序时来说明包含几何数据的三种拓朴结构中分别包括哪些几何信息. 关键字Key Words:OpenCasca