Features
Free Software:
Bielebridge is free software. You have the freedom to run, study, modify, and redistribute bielebridge, as long as you comply with the GPLv3.
Determinism:
Simulation results should be same across multiple runs and different devices. This is achieved by a physics engine with constant time steps.
Many other programs use adaptive time steps to keep up with the frame rate even under load. The downside of this flexible approach is non deterministic results.
Performance:
The engine was designed with performance in mind. It is possible to build and simulate bridges with 10k beams on usual hardware. There are some design principles getting relevant only in really big truss bridges.
Copy/Flip X/Paste Mode (Achievement)
To build big symmetric bridges the editor supports Copy/Paste with (optional) Flip X and deduplication on insert.
Level Editor (Achievement)
Be creative. Make your own levels.
Advanced Stress Analysis
Stress from simulation can be displayed inside editor. This is extremely useful to remove unstressed beams. Use "Pause on Broken" option while simulation to avoid recording stress from breakdown.
Small Binary, few Dependencies
Unlike other games this program is quite minimalistic; No big downloads, only few dependencies (SDL2 and Lua)