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机械 CAD/CAM 技术. 山东理工大学机械工程学院. 第四章 几何建模及特征建模. 第一节 基本概念. 第二节 线框模型. 第三节 曲面建模. 第四节 实体建模. 第五节 特征建模. 第一节 基本概念. 一.基本概念. 1 、建模: 将现实世界中的物体及属性转化为计算机内部数字化表达的原理和方法。 2 、建模的过程 如下图所示 3 .计算机内部表示 就是计算机内部采用什么样的数据模型来描述、存储、表达现实世界的物体及其相关的属性。. 4 .模型的组成 模型一般由数据、数据结构、算法三个部分组成。

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机械 CAD/CAM 技术

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