We wanted a scenario where, say, 5 well-placed border points could efficiently represent an area with 5,000 internal points and 10,000 road edges. This would reduce those 10,000 edges to just 5*4/2 = 10 shortcuts for routing through that cluster at a high level – an incredible 1:1000 point ratio and a 30x reduction in edges to consider for the high-level path!
Real game engines use this pattern (or its 3D cousin, the Octree) for broad-phase collision detection: the quadtree quickly identifies candidate pairs, and a more expensive narrow-phase check tests the actual geometry.
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停产 CCD 相机再翻红，涨价达数倍
近年来，张连起走访多家不同领域企业并开展专项调研，了解到行业“内卷”的根源在于创新能力不足、产品与服务同质化严重，导致企业依赖降价手段争夺市场，这又进一步导致企业利润下降、研发投入缩减。