new model viewer fix 2

2026-04-23 09:20:16 -05:00
parent 023344aef0
commit bae1303e42
1 changed files with 5 additions and 3 deletions
@@ -53,9 +53,11 @@ export async function convertStepFile(
    sourceFile: path.basename(inputPath),
    meshCount:  result.meshes.length,
    meshes: result.meshes.map(mesh => {
-      const pos = mesh.attributes.position.array
-      const nor = mesh.attributes.normal?.array
-      const idx = mesh.index.array
+      // Explicitly wrap in typed arrays — WASM may return array-like objects
+      // without a .buffer property, which would break Buffer.from().
+      const pos = new Float32Array(mesh.attributes.position.array)
+      const nor = mesh.attributes.normal ? new Float32Array(mesh.attributes.normal.array) : null
+      const idx = new Uint32Array(mesh.index.array)
      return {
        positions: Buffer.from(pos.buffer, pos.byteOffset, pos.byteLength).toString('base64'),
        normals:   nor ? Buffer.from(nor.buffer, nor.byteOffset, nor.byteLength).toString('base64') : null,