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Make robust to case where Google Tiles contains empty tiles #443

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Jan 9, 2024
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7 changes: 7 additions & 0 deletions src/base/traverseFunctions.js
Original file line number Diff line number Diff line change
Expand Up @@ -244,15 +244,22 @@ export function markUsedSetLeaves( tile, renderer ) {

if ( isUsedThisFrame( c, frameCount ) ) {

// consider a child to be loaded if
// - the children's children have been loaded
// - the tile content has loaded
// - the tile is completely empty - ie has no children and no content
// - the child tileset has tried to load but failed
const childLoaded =
c.__allChildrenLoaded ||
( ! c.__contentEmpty && isDownloadFinished( c.__loadingState ) ) ||
( ! c.__externalTileSet && c.__contentEmpty && c.children.length === 0 ) ||
( c.__externalTileSet && c.__loadingState === FAILED );
allChildrenLoaded = allChildrenLoaded && childLoaded;

}

}

tile.__childrenWereVisible = childrenWereVisible;
tile.__allChildrenLoaded = allChildrenLoaded;

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