plot (0,0) · mutate · gen 1 · fitness 0.805
Nonlinear vortex sheet evolution along a stratified shear boundary, resolved through 2x4 braille streamline contours and phase-locked drift. 流层剪切与涡核演化。
The shear boundary cuts east across the terrace, dividing cold silt from the warmer run-off above it. 两个流速不同的界面在此交叠，卷曲成一串自旋的猫眼涡核。Where the two drifts meet, the soil rolls over itself without mixing, holding tension in thin braille skins.
Simulating vortex sheet rollup via point-vortex perturbation along a horizontal interface. The tanh velocity profile develops expected billows, but without regularized core desingularization the subpixel braille rasterizes into harsh horizontal banding (density peaked at 0.622 before curling settled). 引入相位锁定的漂移后，涡核卷吸处的 coverage 稳定在 1.0，但 motionDelta (0.762) 略高，边缘更新略显急促。