cmpt/test/b3dm.test.ts

A TypeScript library for parsing and building B3DM (Batched 3D Model) files

import { parseB3dm, buildB3dm } from '../src';
import { readFileSync, writeFileSync } from 'fs';
import { expect, test } from 'vitest'

// 测试：读取GLB文件 → 构建B3DM → 解析B3DM → 验证一致性
test('build and parse b3dm', () => {
  // 读取本地GLB文件（需自行准备测试文件）
  const glbData = readFileSync('./test/test.glb');
  // 构建B3DM
  const b3dmBuffer = buildB3dm({
    glbData,
    featureTableJSON: {
      RTC_CENTER: [120.0, 30.0, 0.0], // 地理坐标（示例）
    },
  });
  // 写入B3DM文件
  writeFileSync('./test/output.b3dm', new Uint8Array(b3dmBuffer));
  // 解析B3DM
  const parsed = parseB3dm(b3dmBuffer);
  // 验证解析结果
  expect(parsed.header.magic).toBe('b3dm');
  expect(parsed.featureTable.json.RTC_CENTER).toEqual([120.0, 30.0, 0.0]);
  expect(parsed.glbData.byteLength).toBe(glbData.byteLength);
});