PETKA: Characters ignore the walking region sometimes

[Tkachov]

In ScummVM heroes sometimes ignore the walking region. Not sure, but it might only happen when clicking the exits from the location. Also, this might be related to #12066

There are "Walk bug: Point doesn’t belong to any convex" messages during that (at least on the scene I'm providing save file from).

Attachments:

attachment:petka1.s17​	ScummVM save file on the shown screen
attachment:save15.dat​	Original game save file

Original game	ScummVM

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ScummVM 2.3.0git11899-g3fb4d67b4e (Jan 16 2021 05:21:57)
Windows 10 version 20H2 64-bit
Petka 1.0.0.1 aka Red Comrades 1

To reproduce:

• load the save file;
• select 'Walk' cursor (right click, then left click on the purple silhouette icon);
• click at the red house on the hill;
• <you would see the characters go straight to it, ignoring that the region requires them to walk via the road>.

[Tkachov]

Added the region render to this ticket:

Red line shows the outline and green ones show the inner polygons. Characters should never walk on the grass because that's outside this region.

[whiterandrek]

Will look into it
But this is is won’t be fixed until I have free time to review the walking code