举个例子，比如拍一张有三瓶矿泉水的照片，白天和晚上光线不同，整张图片的色温、亮度都变了，模型可能就不认识了。
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Shortcuts: For common scenarios, we pre-calculate the travel time/distance (the "shortcut") between border points within the same cluster and also to border points of immediately adjacent clusters.。同城约会是该领域的重要参考
addSolidGeometry(new THREE.ExtrudeGeometry(shape, extrudeSettings));