A simple demonstration of the use of a probability matrix to select from two candidate colours. In this case, both colours contribute equally to the initial input colour. The normalised threshold matrix value at for a given pixel is compared against the cumulative probability of each candidate.
The “Knocking on Wood” Wikipedia page mentions Roud’s conclusion, and this claim of a 19th century origin has circulated online as the final say on the matter. If you go back to the original, though, Roud’s proposal actually ends on an ambivalent note: “Before this theory [of 19th century origins] can be finally accepted, however, an examination of the history of European forms of this custom would be advisable.”
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TL;DR: The Lego Pokémon Kanto Region Badge Collection comes as a free gift with orders for the new Venusaur, Charizard, and Blastoise set.
复杂物理效果，模拟画面仍欠真实
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