{ "source": "analytic", "method": "U channel 80x50 (t 2.5, R 2.5, base y 5..45, flanges z 5..20) with the flat-pattern slot x 35..45, y -12..10 refolded: BA = (pi/2)(R + K t) = 5.654866776, so the slot removes base y 5..10, the whole y=0 bend and the flange from z 5 to 5 + (12 - (BA - 5)) = 16.345133224; x-segments 0..35 / 35..45 / 45..80", "body_count": 1, "volume_mm3": 15800.304003966867, "area_mm2": 13610.326162673397, "center_of_mass": [ 40.0, 25.774257210144707, 5.531072022389276 ], "bbox": { "min": [ 0.0, 0.0, 0.0 ], "max": [ 80.0, 50.0, 20.0 ] }, "note": "unfold/refold maps flat distance through the K-factor neutral layer (K 0.44)" }