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function visibleTilesLoaded(viewer) { | |
var layer = viewer.scene().layer(); | |
var geometry = layer.geometry(); | |
var visibleTilesForLevel = function(level) { | |
return geometry.visibleTiles(viewer.view(), level); | |
}; | |
var tileHasTexture = function(tile) { | |
var tile = layer.textureStore().query(tile); | |
return (!tile.visible || tile.hasTexture); | |
}; | |
var reduceAnd = function(a, b) { | |
return a && b; | |
}; | |
return [].concat.apply([], geometry.levelList | |
.map(visibleTilesForLevel)) | |
.map(tileHasTexture) | |
.reduce(reduceAnd); | |
} |
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