{"params":{"colorway":{"type":"choice","default":"slate-cast","label":"Colorway","describe":"Curated kit-coherent scheme. slate-cast is the approved bay: blue-grey slate on warm timber trim with a black cast gutter. tile-red swaps the covering to red clay tile over a browner timber. refit-sheet is the school that refitted last year: pale grey sheet, white-grey trim and a light grey eaves trim. All three keep the same value ladder, so the ridge always reads lightest against the roof.","options":["slate-cast","tile-red","refit-sheet"]},"piece":{"type":"choice","default":"gable","label":"Piece","describe":"Which piece of the roof run this bay is. gable ends the run with a close-boarded gable wall, a raking barge board, an apex block and a louvred vent. slope is the plain middle bay, cut flat at both ends so copies chain down the ridge. closer is the ridge closer that stops the run against something taller: no gable wall, a raking abutment kerb up both slopes and a closer block over the cut ridge. Every value is the same 3 m span at the same pitch bearing on the same wall head, and presents the identical flat section at the z = -0.5 end.","affects":"geometry","options":["gable","slope","closer"]},"era":{"type":"range","default":0.5,"label":"Era","describe":"How long since this school replaced anything, 0 = 1975, 1 = refitted last year, and it re-roofs the bay rather than repainting it. At 0 the covering is natural slate: seven fine courses with a deep 34 mm lap, a heavy 165 mm barge board and a five-facet cast half-round gutter. At 0.5 it is interlocking tile: five deeper courses at 24 mm. At 1 it is profiled metal sheet: three long sheets with a shallow 14 mm end lap, three standing ribs running up each slope, a folded metal ridge and a squarer plastic eaves trim. The triangle count moves with it.","affects":"geometry","min":0,"max":1,"step":0.05},"term":{"type":"range","default":0.6,"label":"Term","describe":"Whether the school is in session, spent on WEAR because a roof cannot be occupied. At 0 every course line is dead straight and the laps are even. Wear starts immediately: courses settle unevenly by up to 16 mm and single laps lift, so the course lines go crooked, and past the middle of the range one slate slips down each slope and breaks the eaves line. On a sheet roof nothing can slip, so there the wear stays in the settled courses and the lifted end laps.","affects":"geometry","min":0,"max":1,"step":0.05},"pitch":{"type":"range","default":25,"label":"Pitch","describe":"Roof pitch in degrees. 25 is the brief's shallow school pitch and the approved bay; 18 is as low as this covering will go and drops the ridge by about 200 mm. It REBUILDS rather than scaling: the deck stays the same 110 mm section, the barge board the same width, and only the lengths change \u2014 the covering is re-coursed at a constant gauge, so the course count drops as the rake shortens and the triangle count with it. The footprint stays 3.000 x 1.000 m throughout.","affects":"geometry","min":18,"max":25,"step":0.5},"slate":{"type":"color","default":"#5F686E","label":"Covering","describe":"The weathering surface: course faces, course risers, the verge and eaves edges and the underside of the oversail. Slate at low era, profiled sheet at high. The largest area on the part, so everything else is judged against it."},"ridge":{"type":"color","default":"#F1EDE4","label":"Ridge","describe":"Ridge capping and, on the closer piece, the ridge-end closer block and the raking abutment kerb. Deliberately the LIGHTEST tone on the part: the ridge is the line that tells a roof from a wall at 10 m, and it dies if it matches the covering."},"trim":{"type":"color","default":"#B98C5A","label":"Timber trim","describe":"Every piece of sawn trim at once: the fascia at the eaves, the raking barge board, the apex block, the vent louvre blades and the deck seen in section at the module edge. One rung above the covering, one below the gable boarding."},"boarding":{"type":"color","default":"#C9B48C","label":"Gable boarding","describe":"The close-boarded gable infill and the panel behind it. Pale, so the vertical boards read against the darker barge board framing them. Only present on the gable piece."},"gutter":{"type":"color","default":"#3C4348","label":"Gutter","describe":"The eaves gutter, inside and out: cast iron at low era, plastic eaves trim at high. The darkest large zone, which is what puts a shadow line under the eaves."},"soffit":{"type":"color","default":"#7E5230","label":"Soffit","describe":"Everything facing into the room: the underside of the roof deck, the back of the gable panel and the strip bearing on the wall head. A real step darker than the outside faces, because none of it sees the sky."},"vent":{"type":"color","default":"#22262A","label":"Vent void","describe":"The dark inside of the gable vent behind the louvre blades \u2014 the recess floor and its reveal. Near-black, so the vent reads as a hole and not as a panel."}},"presets":{"slate-cast":{"slate":"#5F686E","ridge":"#F1EDE4","trim":"#B98C5A","boarding":"#C9B48C","gutter":"#3C4348","soffit":"#7E5230","vent":"#22262A"},"tile-red":{"slate":"#9E4B52","ridge":"#F1EDE4","trim":"#A87C4A","boarding":"#D9CDB4","gutter":"#3A3F45","soffit":"#5A3A22","vent":"#22262A"},"refit-sheet":{"slate":"#8A9299","ridge":"#F3F4F5","trim":"#E7EAEC","boarding":"#F7F4EE","gutter":"#5F686E","soffit":"#3C4348","vent":"#22262A"}},"rev":1792408797,"materials":{"slate":{"kind":"stone","finish":"rough"},"ridge":{"kind":"stone","finish":"concrete"},"trim":{"kind":"wood","finish":"oiled"},"boarding":{"kind":"wood","finish":"raw"},"gutter":{"kind":"metal","finish":"cast"},"soffit":{"kind":"paint","finish":"matte"},"vent":{"kind":"paint","finish":"matte"}},"materials_note":"what each colour zone is made of: `kind` and `finish` name a procedural PBR material in https://polyfork.dev/materials.mjs (dressByAlbedo finds a zone by its albedo in COLOR_0). A zone not listed has not been classified.","preview_v":1792444374,"mod_v":1792408797}