Chapter II
II
Decoding da Vinci
The desk is the instrument. Root rectangles, rays, the golden spiral — laid on the plate, as Leonardo constructed before he painted.
Decoding da Vinci: The Last Supper
Hambidge’s law: the armature is not decoration. It is how the picture stands.
Instrument · Decoding desk
The armature is glued to the photograph. A ratio is built from the corner. Load a study from this computer — it is not kept.
From this computer
Drop a file on the plate. Nothing is uploaded.
Capture of the plate only — construction, native size
Ratio
Diagonals stay on the picture. The ratio is the dashed root from the top-left.
Layers
Subdivision
Study window
Laying the plate…
PL-04 · Fig. D
Circles, diagonals, and the threes
Geometric analysis / digital armature
N.1Leonardo’s refectory wall reconstructed as a dynamic-symmetry plate.
N.2Twin circles. A white vesica. Red diagonals from every corner.
N.3Christ at the crossing. Apostles grouped in threes — the 3s.
N.4Hambidge: the armature is not decoration. It is how the picture stands.
FOL. 04
PL-05 · Fig. E
Radiating construction from the crown
Geometric analysis of a profile study
N.1A Leonardesque profile under a full armature.
N.2Grid, diagonals, and rays from a point above the skull.
N.3The ear, the nose, the brow — each finds a crossing.
N.4Codex manner: the drawing and the proof occupy one sheet.
FOL. 05
PL-06 · Fig. F
Diamond grid over the living head
Overlay study on painted head
N.1A diamond lattice dropped over a painted head in raking light.
N.2Spectacles, beard, the turn of the mouth — all sit on the net.
N.3The grid does not imprison the face. It explains the turn.
N.4From the series: Using Dynamic Symmetry, Decoding Leonardo.
FOL. 06