{"params":{"colorway":{"type":"choice","default":"tarnished-brass","label":"Colorway","describe":"Curated kit-coherent scheme. tarnished-brass is the default: a dull warm brass shell, a hardware-brass collar and a pale beech handle. polished-brass brightens the shell to near-cream and darkens the handle to varnished timber, for a bell somebody still cleans. nickel-plate is the plain nickel replacement \u2014 a cool grey shell and a dark stained handle \u2014 and it is the far end of the ageing axis this part is named for.","options":["tarnished-brass","polished-brass","nickel-plate"]},"era":{"type":"range","default":0.5,"label":"Era","describe":"How long since this school replaced anything, and it rebuilds the bell. 0 is 1975: a deep heavy casting (bell 112mm of the 250mm), a strongly flared skirt, an 13.5mm soundbow, a fat cast ferrule carrying an extra proud lip ring, a deeply waisted turned handle with a 52mm bulb and a proud domed brass acorn on top. 1 is the replacement bought last year: the same bell thinned and shallowed \u2014 bell down to 94mm, a straighter pressed skirt, a 9mm wall, a slim collar with no lip, an almost parallel moulded grip and a small flush brass pin. Overall height stays 0.250m and the mouth stays 0.155m across at every value, so the bell always stands on the same footprint. The ferrule lip appears and disappears, so 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 dressing and wear. 0 is the holiday: the bell is back in the cupboard, its leather wrist thong taken off and the brass evenly tarnished right down to the lip. 1 is a bell in daily use: a 15mm leather strap wrapped round the handle waist and the 17mm band at the soundbow rubbed bright by the clapper. The strap is real geometry \u2014 a six-sided wrapped band that thickens across the range, so the triangle count moves with it \u2014 and the bright band is the skirt section's own first band, so its edge is a profile vertex rather than a line drawn across a facet. Below 0.15 neither exists at all.","affects":"geometry","min":0,"max":1,"step":0.05},"pose":{"type":"choice","default":"upright","label":"Pose","describe":"Which of the two ways a hand bell is ever found, built rather than turned. upright is the bell standing mouth-down on a desk, handle up, the clapper hanging plumb on the axis inside the closed shell, seen only up through the mouth. onside is the bell laid down: it is re-solved to rest on the two points it really bears on \u2014 one facet of the mouth rim and one facet of the handle bulb \u2014 which leaves it lying at about 13 degrees nose-down with the handle tip clear of the desk, and the clapper has fallen 30 degrees off the axis against the low side of the cavity, so the mouth now faces the camera with the clapper in it. Same object, same origin, same 0.250m of material; only what it is resting on changes.","affects":"geometry","options":["upright","onside"]},"grips":{"type":"choice","default":"four","label":"Grip panels","describe":"How many dark stained finger panels are sunk into the turned bulb of the handle, spaced evenly round it so a facet centre always carries one and the handle stays mirror-symmetric. Each is one full facet column wide, 32mm tall and 3.5mm deep, sunk into one band of the turned section so it closes on the widest ring of the bulb, with real step walls and a floor. none is a plain turned handle; four is the default and matches the reference; six rings the bulb almost continuously. The triangle count moves with the count.","affects":"geometry","options":["none","two","three","four","six"]},"bell":{"type":"color","default":"#B98C5A","label":"Bell","describe":"Albedo of the outer brass shell \u2014 the skirt, the shoulder and the crown. The object's dominant mass and its mid value.","affects":"color"},"strike":{"type":"color","default":"#C9B48C","label":"Strike band","describe":"Albedo of the band at the soundbow that the clapper has rubbed bright. The lightest metal on the bell, and the only bright note on the skirt; it exists only once `term` is above 0.15.","affects":"color"},"interior":{"type":"color","default":"#7E5230","label":"Bell cavity","describe":"Albedo of the inside of the shell \u2014 the cavity the clapper hangs in, seen up through the mouth and across it when the bell is laid on its side. One rung darker than the outer brass because it faces away from the sky, which is what makes the mouth read as an opening into a hollow casting rather than as a dark disc under a solid cone.","affects":"color"},"ferrule":{"type":"color","default":"#8C6239","label":"Collar and button","describe":"Albedo of the cast collar between bell and handle and of the brass button on top of the handle. Hardware brass: a clear rung below the shell so the joint reads as a step in value as well as in section.","affects":"color"},"handle":{"type":"color","default":"#D9CDB4","label":"Handle timber","describe":"Albedo of the turned handle. The object's one non-metal mass and its lightest zone, so the handle reads clearly against the brass below it.","affects":"color"},"grip":{"type":"color","default":"#5A3A22","label":"Grip panels","describe":"Albedo of the sunk floors of the grip panels only \u2014 the step walls beside them stay handle-coloured, so each panel reads at its true width. Dark stained timber, never black.","affects":"color"},"clapper":{"type":"color","default":"#3C4348","label":"Clapper","describe":"Albedo of the iron clapper shank and ball. The darkest zone on the model, so the clapper separates from the cavity around it when the bell is seen from below or laid on its side.","affects":"color"},"thong":{"type":"color","default":"#A87C4A","label":"Wrist thong","describe":"Albedo of the leather strap wrapped round the handle waist. Sits between the handle and the clapper on the value ladder; only present once `term` is above 0.15.","affects":"color"}},"presets":{"tarnished-brass":{"bell":"#B98C5A","strike":"#C9B48C","interior":"#7E5230","ferrule":"#8C6239","handle":"#D9CDB4","grip":"#5A3A22","clapper":"#3C4348","thong":"#A87C4A"},"polished-brass":{"bell":"#C9B48C","strike":"#F1EDE4","interior":"#8C6239","ferrule":"#A87C4A","handle":"#7E5230","grip":"#22262A","clapper":"#3C4348","thong":"#5A3A22"},"nickel-plate":{"bell":"#E7EAEC","strike":"#F3F4F5","interior":"#8A9299","ferrule":"#DADEE0","handle":"#5A3A22","grip":"#22262A","clapper":"#5F686E","thong":"#3C4348"}},"rev":1792408797,"materials":{"bell":{"kind":"metal","finish":"polished"},"strike":{"kind":"metal","finish":"polished"},"interior":{"kind":"metal","finish":"cast"},"ferrule":{"kind":"metal","finish":"cast"},"handle":{"kind":"wood","finish":"lacquered"},"grip":{"kind":"wood","finish":"lacquered"},"clapper":{"kind":"metal","finish":"cast"},"thong":{"kind":"leather","finish":"grain"}},"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":1792444208,"mod_v":1792408797}