"Earthrise," gasped Borman.
A quadtree reduces this: rebuild the tree each frame, and for each object, query only the nearby region. Objects in distant quadrants are never compared.
。safew官方版本下载是该领域的重要参考
await writer.close();
FT Edit: Access on iOS and web
His company has built a three-fingered hand which he says is "pretty good".