| FileReader | Class for reading information from S3D and passing data into structs |
| MainWidget | Main widget class setting up all sub class widget components |
| Point3dWidget | Class for drawing 3D points |
| RefImgWidget | Class for drawing reference image in 2D coordination |
| S3DHead | S3DHead struct: stores information about S3D file |
| SettingWindow | Class for settings window |
| TPixelBW | TPixelBW struct: stores black and white image data |
| TPixelColor | TPixelColor struct: stores color image data |
| TPoint3D | TPoint3D struct: stores 3D points |