Sheet Metal Hem

Status: Implemented (engine-backed)

Sheet Metal Hem reuses the flange pipeline with a fixed 180° fold to create hemmed edges on an existing sheet-metal model.

Inputs

• faces – sheet-metal edge/face overlays to hem.
• useOppositeCenterline – flips fold direction.
• flangeLength – hem leg length.
• edgeStartSetback / edgeEndSetback – trim hem span back from selected edge endpoints.
• inset – edge reposition mode before bend creation (material_inside, material_outside, bend_outside).
• bendRadius – inside bend radius override.
• offset – signed bend-edge offset.

Behaviour

• Resolves selected overlays back to stable sheet-metal tree targets.
• Adds deterministic bend/child-flat nodes using a locked 180° angle.
• Re-evaluates folded 3D and flat 2D outputs through the shared sheet-metal engine.
• Replaces the prior sheet-metal model object and stores updated tree/evaluation data in persistentData.sheetMetal.