The Proportional Diagram Tool is a CAD drawing comparison software developed by Beijing Lizheng Company. This tool enables detailed comparison of various CAD drawing elements such as layers, line widths, line types, colors, and Z coordinates, providing a convenient way to review and verify your drawings.

Software Features
1. Customizable settings for tailored use.
2. Synchronized browsing to enhance navigation.
3. Support for entity construction for quick operation.
4. Ability to quickly replace the DXF group codes under test.
5. Fast comparison of necessary DXF group codes.

Detailed Software Features
New Additions:
1. Supports 45 different types of CAD entities.
2. Comprehensive comparison of entity attributes including position, layer, color, line type, line width, and Z coordinate.
3. Supports external program calls with parameters such as input file, base point, scope, and toolbar visibility.
4. In-depth comparison of all entity differences with detailed information display.
5. Supports comparison between fast referencing and external referencing of internal entities.
6. Allows selection of base points and comparison ranges.
7. Displays differences sorted by coordinates.
8. Compares other miscellaneous differences.
Improvements and Enhancements:
1. Replaced entity range with DXF group code value keyed by DXF 10.
2. Uniform comparison of all entities using DXF group codes.
3. Fixed bugs related to constructing multiple entities with the same key.
4. Refactored algorithm for comparing multiple entities sharing the same key.
5. Fixed bugs in step-by-step difference display.
Removed Functions:
1. Highlighting and color display of different entities.
2. Functionality for displaying only identical entities.
3. Content related to BCG interface library.
4. Synchronized browsing settings.
5. Comparison accuracy settings.
The Proportional Diagram Tool operates as a plugin within CAD software and requires AutoCAD to be installed on your computer; it cannot run independently.















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