# physics_RT: reconstructing Ballance physics behavior

> physics_RT reconstructs Ballance physics behavior as a Win32 Virtools DLL using IVP numerical kernels. It covers collision geometry, force handling and simulation timing, with differential tests against an original DLL and documented runtime comparisons.

- Type: Case study
- Targets: Game
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-08
- Original resource: <https://github.com/doyaGu/physics_RT>
- Primary source: <https://github.com/doyaGu/physics_RT/blob/81fe77d86609e7436424642c838e81ec6b58e5f4/README.md>
- Catalog page: <https://awesomerea.org/resources/physics-rt-ballance-case/>
- Record JSON: <https://awesomerea.org/resources/physics-rt-ballance-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/physics-rt-ballance-case/index.md)

## Requirements & limits

- **Prerequisites:** Windows x86 and Virtools SDK 2.1 are required to build the host DLL.
- **Prerequisites:** Original-image comparisons require the user's original DLL and dependency directory.
- **Testing evidence:** The author reports 107 original-image comparisons and matching candidate observations across 969684 frames of qualifying runs.
- **License:** Apache License 2.0.

## Primary sources

1. <https://github.com/doyaGu/physics_RT/blob/81fe77d86609e7436424642c838e81ec6b58e5f4/README.md>
2. <https://github.com/doyaGu/physics_RT/blob/81fe77d86609e7436424642c838e81ec6b58e5f4/docs/verification.md>

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## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.