Split Shape by Plane in OpenCASCADE eryar@163.com Abstract. Sometimes you want to split a shape by plane or even split a shape by a B Spline surface, OpenCASCADE provide a feature class BRepFeat_SplitShape to implement the function. The paper give a…

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…

FreeType in OpenCASCADE eryar@163.com Abstract. FreeType is required for text display in the 3D viewer. FreeType is a software font engine that is designed to be small, efficient, highly customizable, and portable while capable of producing high-qual…

游戏中的对象按照物理规律移动,体现重力.引力.反作用力.加速度等物体特性,实现自由落体.摇摆运动.抛物线运动,以及物理碰撞现象的模拟.用于模拟物理碰撞.物理运动的引擎称为物理引擎. 来自瑞典斯德哥尔摩大学的Stefan Hedman基于JavaScript,开发了一款面向HTML游戏的2D物理引擎,P2物理引擎.P2和Box2D物理引擎一样,集成了各种复杂的物理公式和算法,帮助实现碰撞.加速.自由落体等物理对象的模拟. P2是一个开源项目,可在GitHub下载,使用build中的p2.min.j…

当谈论到插件时,我是一名极客.各种新颖的 Sketch 插件层出不穷,但是有那么几个是我怎么也离不开的. Sketch 运行器 多层的插件菜单再也不会影响我的效率了. 我推迟了好几年才使用这个插件,因为我不懂怎么把它融入我的设计流程.查找信息?我会选择使用鼠标点击,谢谢.现在想想,我当时真是太傻了.它反应迅速,重要的是,它会改变你和 Sketch 界面交流的方式. 内容生成器(Content Generator)之类的插件,它们的多层子菜单曾经让我很烦恼,现在,我会直接找到我想要的操作. Run…

形状是物理引擎进行碰撞模拟计算的依据,是刚体最基本的属性. P2中使用Shape类来表示形状,通过刚体的addShape()方法,将形状添加到刚体中之后, 就可以随着刚体的移动.旋转不断更新,并进行碰撞检测了.为刚体添加形状的示例代码为: var shape:p2.Shape=new p2.Shape(); var body:p2.Body=new p2.Body(); body.addShape(shape);  Shape类本身并不参与刚体的创建,而是由其几个子类完成一些常见形状的模拟. 这…

立方体旋转动画效果 css #container{ width: 400px; height: 400px; ; ; -webkit-perspective-origin:50% 225px; perspective-origin:50% 225px; } #stage{ width: 300px; height:300px; -webkit-transition: -webkit-transform 2s; transition: transform 2s; -webkit-transform…

OpenCASCADE Shape Location eryar@163.com Abstract. The TopLoc package of OpenCASCADE gives resources to handle 3D local coordinate systems called Locations. A Location is a composition of elementary coordinate systems, each one is called a Datum. The…

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…