| Name | Description |
|---|---|
| ArcTool | Tool used to draw arc. |
| CircleTool | Tool used to draw circle |
| Command | |
| EmptyTool | Tool used to draw nothing |
| ITool | Abstract class use as base class of all draw tool class |
| LineTool | Tool used to draw line |
| Matrix4 | Matrix used to transform between UCS coordinate and world coordinate. |
| NewOpeningsForm | |
| Profile | Base class of ProfileFloor and ProfileWall contain the profile information and can make matrix to transform point to 2D plane |
| ProfileFloor | ProfileFloor class contain the information about profile of floor, and contain method to create Opening on floor |
| ProfileWall | ProfileWall class contain the information about profile of wall, and contain method to create Opening on wall |
| RectTool | Tool used to draw rectangle |
| Vector4 | Vector4 class use to store vector and contain method to handle the vector |