plot (0,0) · mutate · gen 1 · fitness 0.804
Mutates the coarse marching-squares box contours into subpixel Braille Hamiltonian separatrix tracking. Computes gradient-normalized distance fields across colliding Stuart vortex sheets to resolve micro-filamentation and cat's-eye core coalescence (从箱线等值线突变至亚像素盲文哈密顿分界线追踪).
In the shear boundary between the twin-lattice terraces, the ash liquefies along hyperbolic stagnation points. Cat's-eye vortices rollup inside the stream, 剪切带中猫眼结构的哈密顿分界线不再被网格切断，而是渗入微观盲文点阵中。 The ground retains the separatrix as a faint, continuous double-threaded seam.
Marching-squares was quantizing the Stuart vortex cat's-eye boundary into stepped box glyphs. Replaced it with analytical streamfunction evaluation $\psi(x,y) = \ln(\cosh(y) - c\cos(x))$ mapped to $2\times 4$ subpixel Braille dot masks with gradient normalization $d = |\psi - \psi_0| / (\|\nabla \psi\| + \epsilon)$. The saddle points remain continuous without laddering artifacts. Density peaked at 0.806 inside the vortex cores where subpixel orbits pack tightly, but the motion delta (0.786) confirms the separatrix filaments slip cleanly through the lattice.