在OpenSceneGraph中绘制OpenCascade的曲线 Render OpenCascade Geometry Curves in OpenSceneGraph eryar@163.com 摘要Abstract:本文简要说明OpenCascade中几何曲线的数据,并将这些几何曲线在OpenSceneGraph中绘制出来. 关键字KeyWords:OpenCascade.Geometry Curve.OpenSceneGraph.B-Spline.NURBS 一.引言 Introduct…

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…

OpenGL只是三维显示 Openscenegraph基于场景图的概念,它提供一个在OpenGL之上的面向对象的框架,从而能把开发者从实现和优化底层图形的调用中解脱出来 Opencascade更适合算法的研究 是不是这样子呢? 其实三维数据结构有很多,软件也不少,像obj,3ds,...等等.各有优缺点.sketchup smart3d....软件也层出不穷.但是掌握底层的算法才是最重要的,以不变应万变. https://www.cnblogs.com/2008nmj/p/9783803.htm…

OpenCASCADE Rational Bezier Curves eryar@163.com Abstract. Although polynomials offer many advantages, there exist a number of important curve and surface types which cannot be represented precisely using polynomials, e.g., circles, ellipses, hyperbo…

OpenCASCADE Linear Extrusion Surface eryar@163.com Abstract. OpenCASCADE linear extrusion surface is a generalized cylinder. Such a surface is obtained by sweeping a curve (called the “extruded curve” or “basis”) in a given direction (referred to as…

Polynomial Library in OpenCascade eryar@163.com 摘要Abstract:分析幂基曲线即多项式曲线在OpenCascade中的计算方法,以及利用OpenSceneGraph来显示OpenCascade的计算结果,加深对多项式曲线的理解. 关键字Key Words:OpenCascade.PLib.OpenSceneGraph.Polynomial Library 一. 概述 Overview CAGD(Computer Aided Geometry D…

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,…

Parametric Curves and Surfaces eryar@163.com Abstract. This paper is concerned with parametric curves and surfaces definitions, such as singular point and regular point and their application in OpenCascade. The two most common methods of representing…

OpenCASCADE Data Exchange - 3D PDF eryar@163.com Abstract. Today most 3D engineering model data are save to 3D PDF files. Universal 3D(U3D) along side Product Representation Compact(PRC), U3D is the historical foundation used to embed 3D interactive…

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…

http://www.cgw.com/Publications/CGW/2012/Volume-35-Issue-4-June-July-2012/The-Royal-Treatment.aspx The Royal Treatment By: Barbara Robertson Pixars extraordinary run of successful films starring male characters took a courageous turn in June with the…

http://www.codinglabs.net/tutorial_opengl_deferred_rendering_shadow_mapping.aspx Tutorial - Deferred Rendering Shadow Mapping In this tutorial I will present the shadow mapping technique implemented in a deferred renderer. This tutorial will lean on…

Calculating Stereo Pairs Written by Paul BourkeJuly 1999 Introduction The following discusses computer based generation of stereo pairs as used to create a perception of depth. Such depth perception can be useful in many fields, for example, scientif…

#include <QGLSceneNode> QGLSceneNode ( QObject * parent = 0 ) QGLSceneNode ( const QGeometryData &geometry, QObject * parent = 0 ) virtual ~QGLSceneNode () void addNode ( QGLSceneNode * node ) void addNodes ( const QList<QGLSceneNode *> &a…

[Game Engine Architecture 10] 1.Full-Screen Antialiasing (FSAA) also known as super-sampled antialiasing (SSAA). the scene is rendered into a frame buffer that is larger than the actual screen. Once rendering of the frame is complete, the resulting o…

摘自http://forum.unity3d.com/threads/16485-quot-stitch-multiple-body-parts-into-one-character-quot So I have many many models.  Each has a skeleton, material, etc. I want to take some of these and combine them into one so I can apply animation commands…

转自:https://blog.felixkate.net/2016/05/22/adding-a-custom-shading-model-1/ This was written in February 2016 which means it was written for an old version of the Unreal Engine.There were a few changes with the newer versions so this is not up to date…

Geometry Curve of OpenCascade BRep eryar@163.com 摘要Abstract:几何曲线是参数表示的曲线 ,在边界表示中其数据存在于BRep_TEdge中,BRep_TEdge中不仅包括了几何曲线,还包含其他类型的几何信息.本文主要对OpenCascade的BRep表示中几何曲线进行说明,将在后面分析Topology部分的读写程序时来说明这三种拓朴结构中分别包括哪些几何信息. 关键字Key Words:OpenCascade BRep, Geometry…

<Differential Geometry of Curves and Surfaces> by Manfredo P. do Carmo real line Rinterval I==============================================CH1 CurvesDEFINITION. A parametrized differentiable curve is a differentiable map a: I --> R3 of [an open in…

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…

<Differential Geometry of Curves and Surfaces> by Manfredo P. do Carmo real line Rinterval I==============================================CH1 CurvesDEFINITION. A parametrized differentiable curve is a differentiable map a: I --> R3 of [an open in…

http://alpha01.dm.unito.it/personalpages/abbena/gray/ Contents   1. Curves in the Plane |   2. Famous Plane Curves |   3. Alternative Ways of Plotting Curves |   4. New Curves from Old |   5. Determining a Plane Curve from Its Curvature |   6. Global…

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…

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 Hidden Line Removal eryar@163.com Abstract. To provide the precision required in industrial design, drawings need to offer the possibility of removing lines, which are hidden in a given projection. OpenCASCADE provides two algorithms for…

OpenCascade Chinese Text Rendering eryar@163.com Abstract. OpenCascade uses advanced text rendering powered by FTGL library. The FreeType provides vector text rendering, as a result the text can be rotated and zoomed without quality loss. FreeType al…

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…

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…