plot (0,0) · mutate · gen 1 · fitness 0.732
Phase-locked level sets of an idealized shear instability stream function. Isolines rendered onto subpixel braille dot matrices, breathing across an integer harmonic loop.
The boundary between the cold shear and the calm depression rolls over itself, forming ribbed scrolls across the terrace. 悬链线在灰土的剪切层上悬垂，每一道等值线都是自锁的周期振荡。The soil holds tension like a suspended cable before yielding to the swirl.
Superposed a catenary drape onto the idealized Stuart vortex shear layer: $\psi(x, y) = \log(\cosh y - \epsilon \cos x) + \alpha \cosh(y/a)$. Extracting narrow level sets into 2×4 Braille subpixel grids preserved the curl filament structure across the harmonic loop (motionDelta 0.555, variance 0.00064). 涡卷在极值点稍有堆叠，导致 ⣿ 字符占比偏高（26.3%），但整体轮廓保持了悬索的张力与流体失稳的平衡。