gpt-engineer-app[bot]
64 lines
1.9 KiB
TypeScript
64 lines
1.9 KiB
TypeScript
import * as THREE from 'three';
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import { GLTFExporter } from 'three/examples/jsm/exporters/GLTFExporter.js';
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/**
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* Generates a steel I-beam (IPE 200) as a GLB blob.
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* Dimensions in meters (model is 1:1 scale, original units mm).
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* IPE 200: h=200mm, b=100mm, tw=5.6mm, tf=8.5mm, length=1000mm
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*/
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export async function generateDemoBeamGLB(): Promise<{ blob: Blob; fileName: string; fileSize: number }> {
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const scene = new THREE.Scene();
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// IPE 200 dimensions in meters
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const h = 0.200; // height
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const b = 0.100; // flange width
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const tw = 0.0056; // web thickness
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const tf = 0.0085; // flange thickness
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const L = 1.0; // length (1000mm)
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const material = new THREE.MeshStandardMaterial({
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color: 0x8899aa,
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metalness: 0.85,
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roughness: 0.35,
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});
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// Web (vertical plate in the center)
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const webHeight = h - 2 * tf;
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const webGeo = new THREE.BoxGeometry(L, webHeight, tw);
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const web = new THREE.Mesh(webGeo, material);
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web.position.set(0, 0, 0);
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// Top flange
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const topFlangeGeo = new THREE.BoxGeometry(L, tf, b);
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const topFlange = new THREE.Mesh(topFlangeGeo, material);
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topFlange.position.set(0, (webHeight + tf) / 2, 0);
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// Bottom flange
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const bottomFlangeGeo = new THREE.BoxGeometry(L, tf, b);
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const bottomFlange = new THREE.Mesh(bottomFlangeGeo, material);
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bottomFlange.position.set(0, -(webHeight + tf) / 2, 0);
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const group = new THREE.Group();
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group.name = 'IPE200_Steel_Beam';
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group.add(web, topFlange, bottomFlange);
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scene.add(group);
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// Export as GLB
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const exporter = new GLTFExporter();
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const glb = await new Promise<ArrayBuffer>((resolve, reject) => {
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exporter.parse(
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scene,
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(result) => resolve(result as ArrayBuffer),
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(error) => reject(error),
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{ binary: true }
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);
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});
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const blob = new Blob([glb], { type: 'model/gltf-binary' });
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return {
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blob,
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fileName: 'Demo_IPE200_1000mm.glb',
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fileSize: blob.size,
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};
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}
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