Bridge Builder
Interactive simulation — adjust parameters and watch the visualization update in real time.
How it works
Static **2D truss** with axial bar stiffness **EA**. Supports are detected on the dashed **ground** line: **pin** (leftmost) and **roller** (rightmost). Member colors: warm = **tension**, cool = **blue** compression. Faint overlay = amplified **deformed** geometry.
Key equations
(Kff) uf = ff — small-displacement linear elasticity