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better glbs model loading

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Yeicor
2024-02-17 18:38:14 +01:00
parent f50efd3701
commit c357c88a6f
4 changed files with 21 additions and 7 deletions
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8
src/models/glb/glbs.ts
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@@ -18,7 +18,7 @@ export async function* splitGlbs(readerSrc: ReadableStream<Uint8Array>): AsyncGe
finalBuffer.set(buffer4Bytes);
finalBuffer.set(remaining, buffer4Bytes.length);
yield finalBuffer
} else if (magic !== "GLBS") {
} else if (magic === "GLBS") {
// First, we read the number of chunks (can be 0xFFFFFFFF if the number of chunks is unknown).
[buffer4Bytes, buffered] = await readN(reader, buffered, 4);
let numChunks = new DataView(buffer4Bytes.buffer).getUint32(0, true);
@@ -28,7 +28,8 @@ export async function* splitGlbs(readerSrc: ReadableStream<Uint8Array>): AsyncGe
// - Read length
[buffer4Bytes, buffered] = await readN(reader, buffered, 4);
if (buffer4Bytes.length === 0) {
if (numChunks != 0xFFFFFFFF) throw new Error('Unexpected end of stream while reading chunk length');
if (numChunks != 0xFFFFFFFF) throw new Error('Unexpected end of stream while reading chunk length:'+
' expected ' + (numChunks - i) + ' more chunks');
else break // We reached the end of the stream of unknown length, so we stop reading chunks.
}
let length = new DataView(buffer4Bytes.buffer).getUint32(0, true);
@@ -41,7 +42,8 @@ export async function* splitGlbs(readerSrc: ReadableStream<Uint8Array>): AsyncGe
reader.releaseLock()
}
/** Reads exactly `n` bytes from the reader and returns them as a Uint8Array.
/**
* Reads up to `n` bytes from the reader and returns them as a Uint8Array.
* An over-read is possible, in which case the returned array will still have `n` bytes and the over-read bytes will be
* returned. They should be provided to the next call to `readN` to avoid losing data.
*/