@loaders.gl/3d-tiles
Version:
3D Tiles, an open standard for streaming massive heterogeneous 3D geospatial datasets.
29 lines • 1.18 kB
JavaScript
// loaders.gl
// SPDX-License-Identifier: MIT
// Copyright vis.gl contributors
// HELPER ENCODERS
import { assert } from '@loaders.gl/loader-utils';
export function encode3DTileHeader(tile, dataView, byteOffset) {
const HEADER_SIZE = 12;
if (!dataView) {
return byteOffset + HEADER_SIZE;
}
const { magic, version = 1, byteLength = 12 } = tile;
assert(Array.isArray(magic) && Number.isFinite(version) && Number.isFinite(byteLength));
dataView.setUint8(byteOffset + 0, magic[0]);
dataView.setUint8(byteOffset + 1, magic[1]);
dataView.setUint8(byteOffset + 2, magic[2]);
dataView.setUint8(byteOffset + 3, magic[3]);
dataView.setUint32(byteOffset + 4, version, true); // version
dataView.setUint32(byteOffset + 8, byteLength, true); // byteLength
byteOffset += HEADER_SIZE;
return byteOffset;
}
// Bytelength is sometimes only known at the end of writing a tile
export function encode3DTileByteLength(dataView, byteOffsetTileStart, byteLength) {
if (!dataView) {
return;
}
dataView.setUint32(byteOffsetTileStart + 8, byteLength, true); // byteLength
}
//# sourceMappingURL=encode-3d-tile-header.js.map