50 lines
2.0 KiB
JavaScript
50 lines
2.0 KiB
JavaScript
"use strict";
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const fs = require("fs");
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const path = require("path");
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const VEHICLE_IDS = [
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"car_a01_002",
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"car_a02_002",
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"car_a03_001",
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"truck_a01_001",
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"truck_a02_001",
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"truck_a03_001",
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];
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const LIBRARY_ROOT = path.resolve(__dirname, "..", "..", "assets", "models", "custom", "lowpoly_cars");
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const TEXTURE_NAME = "color_512x512.jpg";
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const REVERSED_MODEL_IDS = new Set(["truck_a03_001"]);
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function writePreviewVehicleLibrary(outDir, fileStem) {
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const textureOutput = `${fileStem}-vehicle-texture.jpg`;
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fs.mkdirSync(outDir, { recursive: true });
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fs.copyFileSync(path.join(LIBRARY_ROOT, "textures", TEXTURE_NAME), path.join(outDir, textureOutput));
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return VEHICLE_IDS.map((id) => {
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const modelName = `${fileStem}-vehicle-${id}.gltf`;
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const binName = `${fileStem}-vehicle-${id}.bin`;
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const sourceDir = path.join(LIBRARY_ROOT, id);
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const gltf = JSON.parse(fs.readFileSync(path.join(sourceDir, "model.gltf"), "utf8"));
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for (const image of gltf.images || []) image.uri = textureOutput;
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for (const buffer of gltf.buffers || []) buffer.uri = binName;
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if (REVERSED_MODEL_IDS.has(id)) {
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// The source's longitudinal PCA axis points rearward for this truck.
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for (const node of gltf.nodes || []) node.rotation = [0, 1, 0, 0];
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}
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for (const material of gltf.materials || []) {
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const pbr = material.pbrMetallicRoughness || (material.pbrMetallicRoughness = {});
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// Match the Cesium foliage profile: lift albedo first, then use the
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// texture itself as a modest shadow-side floor.
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pbr.baseColorFactor = [2.1, 2.1, 2.1, 1];
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if (pbr.baseColorTexture) {
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material.emissiveTexture = { ...pbr.baseColorTexture };
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material.emissiveFactor = [0.25, 0.25, 0.25];
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}
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}
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fs.writeFileSync(path.join(outDir, modelName), `${JSON.stringify(gltf, null, 2)}\n`);
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fs.copyFileSync(path.join(sourceDir, "model.bin"), path.join(outDir, binName));
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return modelName;
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});
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}
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module.exports = { VEHICLE_IDS, REVERSED_MODEL_IDS, writePreviewVehicleLibrary };
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