{
    "id": "tracked-excavator-8ebd3c",
    "title": "Tracked Excavator",
    "class": "vehicle",
    "triangles": 2800,
    "kit": "construction-site-9e40b0",
    "free": false,
    "plan": "pro",
    "price_usd": null,
    "price_note": "not sold separately: included in Pro, or in the one-time Founders plan. price_usd is retired and stays null for paid assets \u2014 read `plan`.",
    "owned": false,
    "page": "https://polyfork.dev/asset/tracked-excavator-8ebd3c",
    "thumbnail": "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/hero.png",
    "preview_glb": "https://polyfork.dev/cdn/tracked-excavator-8ebd3c-preview.glb",
    "preview_triangles": 2800,
    "preview_fidelity": 1,
    "preview_rigged": true,
    "preview_rig": "pivots",
    "preview_pivots": [
        "sprocket-l",
        "idler-l",
        "roller-l1",
        "roller-l2",
        "roller-l3",
        "roller-l4",
        "roller-l5",
        "carrier-l1",
        "carrier-l2",
        "sprocket-r",
        "idler-r",
        "roller-r1",
        "roller-r2",
        "roller-r3",
        "roller-r4",
        "roller-r5",
        "carrier-r1",
        "carrier-r2",
        "turntable",
        "boom",
        "dipper",
        "bucket"
    ],
    "preview_note": "Full triangle count, and the rig comes with it: the pivots keep their names so this animates in the store. What the preview does NOT carry is the .mjs program \u2014 the knobs \u2014 and its normals are stripped for flat shading. On a rigged asset the upgrade is the program, not the mesh.",
    "has_rig": true,
    "remixable": true,
    "has_night": true,
    "has_decals": true,
    "has_ik": true,
    "ik_type": "arm",
    "has_skeleton": false,
    "size_m": {
        "x": 3,
        "y": 4.78,
        "z": 7.21
    },
    "origin_y": 0,
    "subscribe": {
        "plan": "Polyfork Pro",
        "usd_per_month": 15,
        "usd_per_year": 149,
        "url": "https://polyfork.dev/pricing",
        "includes": "the .mjs program for every asset, structured GLBs with named pivots and rig, a per-account CDN you can hotlink from a shipped build, the whole catalog as one download, and the largest remix-baking budget",
        "note": "once active, this endpoint returns download URLs and a /c/<token>/ CDN path. Anything downloaded while subscribed stays licensed forever."
    },
    "export_formats": {
        "fbx": {
            "url": "https://polyfork.dev/dl/tracked-excavator-8ebd3c.fbx",
            "for": "Unity, Unreal, Maya, 3ds Max",
            "available": false
        },
        "usdz": {
            "url": "https://polyfork.dev/dl/tracked-excavator-8ebd3c.usdz",
            "for": "iOS AR Quick Look, Omniverse",
            "available": false
        },
        "obj": {
            "url": "https://polyfork.dev/dl/tracked-excavator-8ebd3c.obj",
            "for": "universal, geometry only, no pivots",
            "available": false
        }
    },
    "export_note": "vertex colours become NAMED MATERIALS on export, named after this asset's own colour knobs; a plain format conversion would arrive white, because only three.js reads our COLOR_0. Built on first request (about a second), cached after. available:false means this asset is not yours yet, so these URLs answer 403. Polyfork Pro ($149 a year for the whole catalogue) makes them fetchable; the preview GLB above needs nothing.",
    "night": {
        "beacon": {
            "color": "#FFC24A",
            "intensity": 0.6,
            "describe": "the beacon dome on the cab roof's rear outer corner and the two rear lamps in the counterweight, glowing the kit's one warning amber"
        },
        "cabLamp": {
            "color": "#F2F7FF",
            "intensity": 1,
            "describe": "the work lamp on the front edge of the cab roof, burning hard cold work-white down the arm"
        },
        "boomLamp": {
            "color": "#F2F7FF",
            "intensity": 1,
            "describe": "the work lamp on the boom's left flank at the bend, riding with the boom and lighting the bucket in cold work-white"
        }
    },
    "night_note": "each zone is found by its ALBEDO in COLOR_0: match those vertices exactly, make them emissive at the zone colour and intensity, and drop your scene lights. That is the whole night look.",
    "decals": [
        {
            "name": "counterweight",
            "size": [
                0.7,
                0.5
            ],
            "at": [
                0,
                1.64,
                -3.628
            ],
            "normal": [
                0,
                0,
                -1
            ],
            "up": [
                0,
                1,
                0
            ],
            "describe": "the flat centre facet of the counterweight's back, between the two rear lamps: the panel a hire company letters its name and fleet number on"
        },
        {
            "name": "house-right",
            "size": [
                1.1,
                0.5
            ],
            "at": [
                -1.4,
                1.72,
                -1.01
            ],
            "normal": [
                -1,
                0,
                0
            ],
            "up": [
                0,
                1,
                0
            ],
            "describe": "the long flat yellow flank of the house on the machine's right (-X), ahead of the engine-bay vent and above the deck lip"
        }
    ],
    "decals_note": "flat areas you can print your own logo, sign, number or stencil on. `at` is the centre in model space (metres), `normal` points out of the surface, `up` is which way is up in the artwork, `size` is [width, height]. In three.js: bake art with https://polyfork.dev/cdn/sdf.mjs and place it with https://polyfork.dev/cdn/decal.mjs. In any other engine, a `plate` area takes a quad at `at` + `normal` * 0.002; a `projected` area is on a curved face `relief_mm` deep and the mark has to be projected onto the geometry. `albedo` is the colour of the surface underneath, so you can pick art that contrasts.",
    "params_url": "https://polyfork.dev/cdn/tracked-excavator-8ebd3c-params.json",
    "materials": 1,
    "draw_calls": 47,
    "palette": [
        {
            "hex": "#262b2f",
            "share": 0.506
        },
        {
            "hex": "#e3a31b",
            "share": 0.215
        },
        {
            "hex": "#9ba5ab",
            "share": 0.086
        },
        {
            "hex": "#3a4146",
            "share": 0.085
        },
        {
            "hex": "#555e63",
            "share": 0.046
        },
        {
            "hex": "#15181a",
            "share": 0.034
        }
    ],
    "style": "low-poly, flat-shaded vertex colors, no textures, single shared material, so any set of these merges to one draw call; shares palette and scale with its kit",
    "origin": "ground level (minY = 0): the model sits on y=0 as-is",
    "rigged_parts": {
        "turntable": {
            "axis": "y",
            "range": [
                -180,
                180
            ]
        },
        "boom": {
            "axis": "x",
            "range": [
                40,
                -40
            ]
        },
        "dipper": {
            "axis": "x",
            "range": [
                55,
                -55
            ]
        },
        "bucket": {
            "axis": "x",
            "range": [
                -85,
                120
            ]
        },
        "sprocket-l": {
            "axis": "x",
            "range": [
                0,
                150
            ]
        },
        "sprocket-r": {
            "axis": "x",
            "range": [
                0,
                150
            ]
        },
        "idler-l": {
            "axis": "x",
            "range": [
                0,
                150
            ]
        },
        "idler-r": {
            "axis": "x",
            "range": [
                0,
                150
            ]
        },
        "roller-l1": {
            "axis": "x",
            "range": [
                0,
                150
            ]
        },
        "roller-l2": {
            "axis": "x",
            "range": [
                0,
                150
            ]
        },
        "roller-l3": {
            "axis": "x",
            "range": [
                0,
                150
            ]
        },
        "roller-l4": {
            "axis": "x",
            "range": [
                0,
                150
            ]
        },
        "roller-l5": {
            "axis": "x",
            "range": [
                0,
                150
            ]
        },
        "roller-r1": {
            "axis": "x",
            "range": [
                0,
                150
            ]
        },
        "roller-r2": {
            "axis": "x",
            "range": [
                0,
                150
            ]
        },
        "roller-r3": {
            "axis": "x",
            "range": [
                0,
                150
            ]
        },
        "roller-r4": {
            "axis": "x",
            "range": [
                0,
                150
            ]
        },
        "roller-r5": {
            "axis": "x",
            "range": [
                0,
                150
            ]
        },
        "carrier-l1": {
            "axis": "x",
            "range": [
                0,
                150
            ]
        },
        "carrier-l2": {
            "axis": "x",
            "range": [
                0,
                150
            ]
        },
        "carrier-r1": {
            "axis": "x",
            "range": [
                0,
                150
            ]
        },
        "carrier-r2": {
            "axis": "x",
            "range": [
                0,
                150
            ]
        }
    },
    "detachable_parts": [],
    "animation": "rigged parts are named groups with the pivot at the hinge/axle: obj.getObjectByName(part) then rotation[axis] (rotate, degrees) or position[axis] (slide, meters)",
    "arm": {
        "slew": "turntable",
        "joints": [
            "boom",
            "dipper"
        ],
        "upper": 4.061,
        "lower": 3.345,
        "tip": [
            0,
            -3.343,
            -0.139
        ],
        "tip_rest": [
            -0.13,
            0.697,
            2.581
        ],
        "base": [
            0,
            0,
            -1.23
        ],
        "reach": 7.406,
        "stays": [],
        "axes": {
            "slew": "y",
            "joints": "x"
        },
        "units": "metres, radians",
        "runtime": "https://polyfork.dev/cdn/walk.mjs",
        "note": "two-link chain with a slew: the same solver the legged machines use. Joint ranges in `rig` are the real limits and the tip stops at them.",
        "how": "a slew and a two-link boom: aim the tip and solve, stopping at the joint ranges in rigged_parts. three.js users import https://polyfork.dev/cdn/walk.mjs and call arm(model, { rig, detach }).reachTo(point), where rig and detach are the asset module's own exports (import { createAsset, rig, detach } from the .mjs): the arm cannot find its joints without them"
    },
    "published_at": "2026-10-07 04:18:04",
    "renders": [
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/back.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/compare.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/detail.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/front.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/hero-crop.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/hero.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/left.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/low-back.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/low.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/pose-boom.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/pose-bucket.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/pose-carrier-l1.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/pose-carrier-l2.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/pose-carrier-r1.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/pose-carrier-r2.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/pose-dipper.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/pose-idler-l.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/pose-idler-r.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/pose-roller-l1.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/pose-roller-l2.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/pose-roller-l3.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/pose-roller-l4.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/pose-roller-l5.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/pose-roller-r1.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/pose-roller-r2.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/pose-roller-r3.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/pose-roller-r4.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/pose-roller-r5.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/pose-sprocket-l.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/pose-sprocket-r.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/pose-turntable.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/proofs.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/right.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/top.png",
        "https://polyfork.dev/files/tracked-excavator-8ebd3c/renders/views.png"
    ],
    "license": "Use in commercial projects, no attribution. No redistribution of the files themselves. https://polyfork.dev/licensing",
    "access": {
        "as": "anonymous",
        "remix_bakes_per_hour": 40,
        "remix_bakes_left_this_hour": 40,
        "remix_note": "The budget is on generating NEW geometry. Variations anyone has already baked are served to everybody and never counted, so re-fetching a variant you or anyone else has made costs nothing.",
        "remix_bakes_per_month": 100,
        "remix_bakes_left_this_month": 100,
        "remix_allowance_resets": "2026-11-01",
        "remix_allowance_note": "A free account raises this to 300 a WEEK, and costs an email address.",
        "a_free_account_adds": {
            "how": "Authorization: Bearer <key>, created at https://polyfork.dev/account. Costs an email address.",
            "remix_bakes_per_hour": 100,
            "remix_bakes_per_week": 300,
            "downloads": "every FREE asset as .glb, .mjs and a ready-to-serve zip"
        },
        "pro_adds": {
            "url": "https://polyfork.dev/pricing",
            "usd_per_year": 149,
            "module_mjs": "the createAsset() program itself \u2014 knobs evaluated in YOUR engine at runtime, no bake, no round trip, no per-variant file",
            "structured_glb": "the authored GLB: named parts, detachables, real material names, real normals. Worth most where the public preview is one joined anonymous mesh \u2014 every static asset and 186 of the 499 rigged ones. The other 313 rigged assets keep their hierarchy in the preview and can demo themselves without this; get_asset's preview_rig says which you have",
            "cdn": "a per-account /c/<token>/ path you can hotlink from a shipped build; it keeps up when an asset is rebuilt, and the token is not the API key",
            "remix_bakes_per_hour": 900,
            "remix_bakes_per_week": "uncapped \u2014 a free account gets a weekly allowance, Pro does not"
        }
    }
}