🧪 Market Equilibrium Space (3D)

The 2D original exposes Market Volatility, Supply Elasticity and Demand Elasticity sliders, but its canvas loop only jitters decorative particles — it never actually computes a supply curve, a demand curve or an equilibrium price. This 3D companion implements the real linear economic model those controls were always meant to drive: Qd(P) = D0 − dSlope·P and Qs(P) = S0 + sSlope·P, with elasticity sliders mapped to the curve slopes and the volatility slider driving genuine demand/supply shocks to the intercepts. The market price is pushed toward equilibrium by a real Walrasian tâtonnement law, dP/dt = k·(Qd − Qs), using the identical dt = 0.1-per-tick time convention as the 2D original. Supply and demand are drawn as true 3D line curves in quantity/price space, a yellow marker sits at the analytically computed equilibrium point, and the live simulated price traces a 3D trail extruded along the time axis — convergence toward equilibrium becomes visible in genuine 3D instead of a flat 2D plot.