Source: Computational Materials Science, Volume 267
Фото: Belkin Alexey / News.ru / Globallookpress.com
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Notice how by step 3, the time HotAudio’s player calls appendBuffer, the data has already been decrypted by their JavaScript code. It has to be. The browser’s built-in AAC or Opus decoder doesn’t know a damn thing about HotAudio’s proprietary encryption scheme. It only speaks standard codecs. The decryption must happen in JavaScript before the data is handed to the browser.
The spatial view (the grid of rectangles) and the tree view (the hierarchy of nodes) represent the same structure. Searching for a point means walking down the tree: at each node, you check which of the four children contains your target coordinate and recurse into that child. You never visit the other three.