CPU structural solver
A pure-C# structural showcase from the GameDevelopment.BridgeBuilder leaf. A real truss solver computes axial forces and per-member utilisation as the load ramps up - members shade from green to red as they near capacity. Then, when a member fails, a position-based-dynamics collapse simulator (Verlet integration with distance constraints) drops the snapped member and the deck sags under gravity. All on the .NET base library, with zero dependencies - the frames become the images below.
A 6-panel Warren truss loaded by the real TrussSolver (colours ramp with utilisation), then the CollapseSimulator hinges the failed span down into a deep sag.
At the failure load each member is tinted by its utilisation - the bottom chord in tension green, the top chord and diagonals in hot orange and red.
The snapped member (thin red) is removed and Verlet distance constraints let the deck fold into a hanging catenary under gravity, pinned at both abutments.
The truss solver assembles joint equilibrium and solves the member axial forces, dividing each by its section capacity - Euler buckling in compression, yield in tension - to get a utilisation ratio; the renderer colours each member by that ratio. On failure the collapse simulator treats joints as particles and intact members as stiff distance constraints, integrates gravity with Verlet, and relaxes the constraints each step - so the freed mechanism swings down realistically. Plain C# on the base library, portable by transliteration and free of any external dependency.