Seated, active, playing
A player will be considered:
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seated, if his chair is occupied
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active: if he is posting blinds, i.e not sitting out
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playing, if he holds cards; i.e either face-cards or cardbacks.
OpenHoldem will scrape the above information in this order and much depends on getting this information right. For example if a player is not even seated, then OpenHoldem will be smart and avoid the costly scraping of cards and especially names. Fortunately deciding if a player is seated or active can usually be done with an inexpensive and reliable hash-transformation, which usually requires only the colour of a single pixel.
Scraping cards works in a similar way: It requires:
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cardbacks: again this information can usually be scraped with a cheap and reliable colour-transform
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“nocard”-regions. These regions were introduced for two reasons: if a player holds no cards we can avoid the somewhat costly scraping for card-faces which usually requires fuzzy fonts. As an additional benefit we get improved error-detection in debug-mode, because a player either shows cardbacks, cardfaces or no-card.
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cardfaces (or alternatively ranks plus suits): this information can sometimes be done with hashes or images, if the cards are always displayed the same way: but often the display will differ a little bit and you will need text-scraping (fuzzy fonts).
In practice it looks like this:
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Not seated
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pXseated == false
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Rest does not matter
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Seated, but sitting out
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pXseated == true
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pXactive == false
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Seated and active, but not playing
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pXseated == true
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pXactive == true
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pXcardback == false
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pYcardfaceYnocard == true
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Seated, active and playing (villain)
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pXseated == true
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pXactive == true
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pXcardback == true
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Seated, active and playing
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(usually hero, at some casinos villain at showdown)
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pXseated == true
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pXactive == true
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pXcardback == false
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pXcardfaceYnocard == false
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