STAGE 3 · THE GRID OBEYS
T(
î
) → x , y
2
1
T(
ĵ
) → x , y
-1
2
Transform ▶
Reset ⟲
Grey grid = original plane (static reference).
Green mesh
= same grid, transformed.
Yellow line
= y = x ·
pink line
= y = −x
Watch: lines stay straight, spacing stays even,
origin never moves.