Sheet Metal Flange

Status: Implemented (engine-backed)

Sheet Metal Flange extends an existing sheet-metal tree by attaching bend children to selected sheet-metal edge overlays.

Inputs

• faces – Select sheet-metal EDGE overlays (or flat FACE overlays) from an existing sheet-metal model.
• angle – Bend angle relative to the parent flat.
• useOppositeCenterline – Flips bend direction by changing bend angle sign.
• flangeLength – Child flat leg length.
• edgeStartSetback / edgeEndSetback – trim the active flange span back from the selected edge endpoints.
• flangeLengthReference – Interprets flangeLength as inside, outside, or web distance and converts to the engine’s tangent-based web leg.
• inset – Controls parent-edge repositioning in 2D before bend creation:

material_inside = thickness + bendRadius, material_outside = bendRadius, bend_outside = 0.

• bendRadius – Inside bend radius override.
• offset – Additional signed bend-edge offset (positive = outward, negative = inward).

Behavior

• Reads the source SheetMetalTree from the selected sheet-metal model.
• Resolves selected edge targets by stable flatId/edgeId metadata.
• For inset/offset, rewrites the parent flat loop by moving the target bend edge (material_inside = t + r, material_outside = r, bend_outside = 0) and inserting bridge edges so the flat remains closed.
• Applies start/end setbacks before bend construction so flanges can terminate short of edge corners.
• For flangeLengthReference, adjusts the child web leg length from inside/outside/web reference to tangent-based leg length.
• Adds deterministic bend + child-flat nodes, then re-evaluates 3D and 2D outputs with the shared engine.
• Replaces the previous sheet-metal model object in scene with the updated one.
• Stores updated tree and evaluation summary in persistentData.sheetMetal.

Hem Variant

Sheet Metal Hem reuses the same pipeline with an angle override of 180° and a small default bend radius.