teigha开发从入门到精通（2）--kernel sdk和 drawings sdk核心模块功能介绍

drawings sdk依赖kernel sdk

kernel sdk核心模块包括：

• TD_Alloc — Memory allocation（内存分配）
• TD_Root — Core functionality（核心功能）
• TD_DbRoot — Common database functionality（通用数据库功能）
• TD_Ge — Geometry classes (OdGe*)（几何类）
• TD_Gi — Entity vectorization classes (OdGi*)（实体矢量化类）
• TD_Gs — Graphical system classes (OdGs*)（图形化系统类）
• TD_SpatialIndex — Spatial indexing support (OdSi*)（空间索引支持）

drawings sdk的模块包括：

• TD_DbCore — Implements the core .dwg database functionality（实现核心的dwg数据库功能）

• TD_Db — Provides the functionality to initialize and uninitialize the
  core Drawings SDK runtime environment implemented in the following
  modules:

  • TD_DbIO.tx - Extension that implements file read-write components for .dwg, .dxf, and .dxb formats and some other file-related operation APIs. It can be loaded optionally as a TD_DbIO extension application.

  • TD_DbEntities.tx - Extension that implements the built-in entity set.
    It can be loaded optionally as a TD_DbEntities extension application.

  • ISM.tx - Extension that implements the raster image entity

  • WipeOut.tx - Extension that implements the WipeOut entity

  • RText.tx - Extension that implements the RText entity

  • ATEXT.tx - Extension that implements the arc-aligned text entity

  • SCENEOE.tx - Extension that implements a set of scene definition and rendering setting components

  • ACCAMERA.tx - Extension that implements the camera entity

  • AcMPolygonObj15.tx - Extension that implements the multi-polygon
    entity.

  • TG_Db — .dgn files support functionality

参考：https://docs.opendesign.com/td/tdrawings_libraries.html