[Scummvm-tracker] [ScummVM :: Bugs] #16606: SCI: SQ6: Walking over background causes softlock in Stellar's brain

[ScummVM :: Bugs]

#16606: SCI: SQ6: Walking over background causes softlock in Stellar's brain
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Reporter:  GateKeeper-Adventurer  |       Owner:  (none)
    Type:  defect                 |      Status:  new
Priority:  normal                 |   Component:  Engine: SCI
 Version:                         |  Resolution:
Keywords:                         |        Game:  Space Quest 6
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Comment (by GateKeeper-Adventurer):

 It is clearly an issue that is related to the previous report. The
 previous report doesn't mention any softlocks that can follow, so at least
 that seems to be a new observation.

 I am not entirely sure about what #9589 is saying. "Clicking around the
 bottom third of the window allows clipping through the scenery" is a bit
 confusing, because the bottom third is the user interface, and not really
 the background. Assuming that it means the visible background, it still is
 a bit different situation.

 What I encountered is that clicking near the top allows walking through
 the graphics.
 I attach an illustration here, where the blue circle is the area where the
 player can click to make Roger Wilco come through, and the yellow arrow is
 the approximate area where the penetration occurs. This doesn't happen
 every time, but going back and forth a few times should trigger it.

 I don't pretend to know how exactly the pathfinding works, but assuming
 that X and Y coordinates are read at some points, there should be a "dirty
 hack" to fix the symptoms, not the actual problem. If Roger Wilco can't go
 past the point on the X-axis that is illustrated with the red line, and
 the player is forced to cut the hole, I think it should prevent this from
 happening in most cases that I was able to trigger.

 Similarly in the shuttle bay entrance, putting some top point on the
 Y-axis wouldn't really fix the pathfinding as such, but would prevent
 Roger Wilco from walking on the wall.

 Obviously if the pathfinding works in a completely different fashion, then
 that quick fix wouldn't work.
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Ticket URL: <https://bugs.scummvm.org/ticket/16606#comment:2>
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