{"params":{"colorway":{"type":"choice","default":"dock-oak","label":"Colorway","describe":"Curated kit-coherent scheme. dock-oak is warm mid-brown oak on a lighter plank deck; tarred-pine is a much darker, near-black-iron creosoted derrick; sun-bleached is pale grey driftwood with grey-steel hardware; harbour-blue keeps the oak but paints the deck bearers, rim beams and bolsters harbour teal.","options":["dock-oak","tarred-pine","sun-bleached","harbour-blue"]},"jibReach":{"type":"range","default":4,"label":"Jib reach","describe":"Boom length in metres from the pivot pin to the tip sheave, and the rake is driven off it: 3.0 is the short warehouse boom, steep at 38 deg, reaching ~2.3 m past the post; 5.0 is the long ship boom, shallow at 28 deg, reaching ~4.3 m out over the water on a longer fall, so a longer boom reaches OUT rather than just standing taller. Rebuilds the boom rather than scaling it \u2014 the baulk keeps the same section at every value, and extra ferrule collars appear at a constant 1.80 m pitch once the spar is long enough to need them (none up to 4 m, a pair at 5 m), so the triangle count moves with the slider.","affects":"geometry","min":3,"max":5},"postHeight":{"type":"range","default":6,"label":"King post height","describe":"Height in metres to the top of the post crown. Rebuilt, not scaled: the post gains iron straps at a constant 0.95 m pitch (2 straps at 5.0 m, 3 at 6.0 m, 4 at 6.4 m) and the pivot, bolster, back-stay bracket and stay lines all move up with the head. The post section, deck and winch are unchanged at every value.","affects":"geometry","min":5,"max":6.4},"backStay":{"type":"toggle","default":true,"label":"Back stay bracket","describe":"The timber outrigger arm and diagonal strut that project rearwards from the post below the pivot, ending in a cleat block. On, the derrick has a braced tail in side view; off, the post is clean at the back for tucking the crane against a wall.","affects":"geometry"},"timber":{"type":"color","default":"#9C6B3C","label":"Timber","describe":"Albedo of every sawn structural timber: king post, both jib sections, knee braces, back-stay bracket, winch cheek posts and the crank grip."},"deck":{"type":"color","default":"#C9975C","label":"Deck boards","describe":"Albedo of the base platform boards only. Keep it a value step lighter than timber so the pad reads as a separate plane under the post."},"frame":{"type":"color","default":"#6B4526","label":"Frame timber","describe":"Albedo of the dark structural rung: deck bearers, rim beams, post foot bolster, pivot bolster and the jib ferrule collars."},"iron":{"type":"color","default":"#3E4348","label":"Ironwork","describe":"Albedo of all hardware: pivot bosses and bolt heads, post straps, jib tip cap and sheave, winch axle stubs and crank pin, and the cargo hook."},"rope":{"type":"color","default":"#DCCBA6","label":"Rope","describe":"Albedo of the hemp: the winch drum coils, the paired stay lines, the lead rope up the post and the hanging fall. The palest zone in the asset."},"scale":{"type":"range","default":1,"label":"Scale","describe":"Scales the whole model; 1 is as built. Real-world size is in this range (real height is 10-25 m, as built 6.62 m).","affects":"geometry","min":1,"max":4.2,"step":0.05}},"presets":{"dock-oak":{"timber":"#9C6B3C","deck":"#C9975C","frame":"#6B4526","iron":"#3E4348","rope":"#DCCBA6"},"tarred-pine":{"timber":"#6B4526","deck":"#9C6B3C","frame":"#4A2E1B","iron":"#2A2320","rope":"#C4A46A"},"sun-bleached":{"timber":"#A79680","deck":"#C4A46A","frame":"#8A8071","iron":"#6E757A","rope":"#F0E6CE"},"harbour-blue":{"timber":"#9C6B3C","deck":"#B99B68","frame":"#1C6B84","iron":"#3E4348","rope":"#E8D6A8"}},"rev":1792622218,"materials":{"timber":{"kind":"wood","finish":"raw"},"deck":{"kind":"wood","finish":"oiled"},"frame":{"kind":"wood","finish":"raw"},"iron":{"kind":"metal","finish":"cast"},"rope":{"kind":"fabric","finish":"canvas"}},"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":1792622230,"mod_v":1792622218}