如何在客户自己的车型上预览改色膜、车窗膜或隐形车衣（PPF）

# the customer's exact model year, in white: the base every material goes on top of
curl --fail-with-body -H "Authorization: Bearer $CAR_IMAGE_API_KEY" \
  "https://carimage.dev/api/v1/images/car?vehicle=veh_0ta0ejj0qad2w&view=side&color=white&w=1024&format=png" \
  -o m4-side-white.png

# a solid-color wrap or a factory paint, by hex: the API recolors the paint and leaves glass, trim and wheels alone
curl --fail-with-body -H "Authorization: Bearer $CAR_IMAGE_API_KEY" \
  "https://carimage.dev/api/v1/images/car?vehicle=veh_0ta0ejj0qad2w&view=side&color=686c70&w=1024&format=png" \
  -o m4-side-nardo.png

// A textured material (carbon, chrome, a printed design) goes on in the browser.
// The white render is the mask: paint the material only where the car is, then let
// the render's own shading through.
const car = await loadImage(whiteBaseUrl); // transparent PNG from the API
const ctx = canvas.getContext("2d");
canvas.width = car.width;
canvas.height = car.height;

ctx.drawImage(car, 0, 0);
ctx.globalCompositeOperation = "source-atop"; // keep the car's alpha
ctx.fillStyle = ctx.createPattern(materialSwatch, "repeat");
ctx.fillRect(0, 0, canvas.width, canvas.height);
ctx.globalCompositeOperation = "multiply"; // shading, reflections and panel lines come back
ctx.drawImage(car, 0, 0);
// The whole silhouette is covered, glass and wheels included: the API ships the car's
// alpha, not per-panel masks. Good enough for a quote; a solid color should use color=<hex> instead.

curl -X POST https://carimage.dev/api/v1/3d \
  -H "Authorization: Bearer $CAR_IMAGE_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: wrap-quote-4471" \
  -d '{"vehicle": "veh_0ta0ejj0qad2w", "color": "white", "publish": true}'

{
  "data": {
    "id": "8c1d6b8e-2b4a-4f6e-9a2e-1f3c5d7e9b01",
    "object": "3d_model",
    "status": "queued",
    "progress": 0,
    "vehicle": {
      "id": "veh_0ta0ejj0qad2w",
      "make": "bmw",
      "model": "m4",
      "year": 2021
    },
    "color": "white",
    "files": null,
    "public": {
      "id": "m3d_…",
      "url": "https://carimage.dev/api/v1/3d/public/m3d_…",
      "files": null,
      "embed": {
        "script": "https://carimage.dev/embed/3d.js",
        "html": "<script src=\"https://carimage.dev/embed/3d.js\" async></script>\n<car-3d model=\"m3d_…\"></car-3d>"
      }
    }
  },
  "billing": {
    "charged_on": "creation",
    "credits_charged": 100,
    "credits_remaining": 24900,
    "already_owned": false
  },
  "request_id": "req_01j9y…"
}

<script src="https://carimage.dev/embed/3d.js" async></script>
<car-3d model="m3d_…" view="front-3-4" spin backdrop="studio" ar alt="2021 BMW M4 in white"></car-3d>

# the white base and a hex paint, straight to files
npx @meterapp/car-image get --vehicle veh_0ta0ejj0qad2w --view side --color white --width 1024 --out m4-side-white.png
npx @meterapp/car-image get --vehicle veh_0ta0ejj0qad2w --view side --color 686c70 --width 1024 --out m4-side-nardo.png

# the 3D model: published at once, polled until ready, every file downloaded
npx @meterapp/car-image 3d create --vehicle veh_0ta0ejj0qad2w --color white --publish --wait --out ./models

import { CarImageClient } from "@meterapp/car-image-sdk";

const client = new CarImageClient({ apiKey: process.env.CAR_IMAGE_API_KEY });

// 100 credits the first time. Ordering the same vehicle in the same color again
// answers billing.already_owned: true and charges nothing.
const { data: model } = await client.create3dModel({ vehicle: "veh_0ta0ejj0qad2w" }, { color: "white", publish: true });
const ready = await client.wait3dModel(model.id, { onProgress: (m) => console.log(m.stage, m.progress) });

// FBX for the designer's tool of choice, USDZ for the customer's iPhone, glb_web for the page.
const fbx = await client.download3dModel(ready.id, "fbx");
const embedHtml = ready.public?.embed.html;