[Scummvm-tracker] [ScummVM :: Bugs] #13065: SCUMM: Incorrect screen shaking

[ScummVM :: Bugs]

#13065: SCUMM: Incorrect screen shaking
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Reporter:  eriktorbjorn  |      Owner:  (none)
    Type:  defect        |     Status:  new
Priority:  normal        |  Component:  Engine: SCUMM
 Version:                |   Keywords:
    Game:                |
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 At least in some SCUMM games (it's been verified with Full Throttle and
 Day of the Tentacle) ScummVM shakes the screen incorrectly.

 In Full Throttle, you can test this by hitting the wrong parts of the
 dumpster you start in. The game draws a dent and the screen shakes
 briefly. In DOSBox, the screen is moved upwards. In ScummVM, it's moved
 downwards. Also, Full Throttle displays more shake frames than ScummVM
 does.

 In Day of the Tentacle, if you turn on the stereo the screen starts
 shaking. Again, DOSBox moves the screen upwards. ScummVM moves it
 downwards.

 At lest in Day of the Tentacle, DOSBox shakes the mouse pointer along with
 the rest of the screen. ScummVM doesn't. ''If'' we're going to emulate
 this, we have to make sure that mouse clicks are registered at the correct
 coordinates.
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Ticket URL: <https://bugs.scummvm.org/ticket/13065>
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