[quake3-bugzilla] [Bug 5508] New: "CanDamage" sometimes doesn't damage player

[bugzilla-daemon at icculus.org]

https://bugzilla.icculus.org/show_bug.cgi?id=5508

           Summary: "CanDamage" sometimes doesn't damage player
           Product: ioquake3
           Version: unspecified
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P3
         Component: Misc
        AssignedTo: zakk at icculus.org
        ReportedBy: kuehnhammertobias at gmx.at
         QAContact: quake3-bugzilla at icculus.org


Created attachment 3142
  --> https://bugzilla.icculus.org/attachment.cgi?id=3142
bugfix for "CanDamage" function

Hi, 

Here is another patch for a bug in (io)quake3:

-------------------------------------------------------------------------------

BUG: Sometimes inflictor causes no damage to a target!
     In other words, sometimes rockets, grenades etc. doesn't damage players.

-------------------------------------------------------------------------------

TEST: You will notice this bug not often, but if it happens, you will notice it
      because a victim will even survive a quad/bfg shot.
      Search for walls with a height of ~ 40 units (q3dm1 windows, mpteam5)
      or create a test map:
           ________
           |      |
           |      |
           |      |
           | BBOX |    
           |      | __x__ <--- Impact point on top of wall = No damage  
           |      | |   |
           |      | |   | <--- Wall with a height of 32 - 48 units 
     ______|______|_|   |_______

     Stay near to this wall, fire a rocket on the top plane of that wall!
     Try to hit the center of that plane, you won't get damaged!

-------------------------------------------------------------------------------

(POSSIBLE) SOLUTION: see attached patch!

-------------------------------------------------------------------------------

NOTE: The id comment: // this should probably check in the plane of projection,
                         rather than in world coordinate, and also include Z

      represents what I am talking about. I didn't delete it because maybe 
      there is a better solution for that bug. On planes with a hight of 48
      units the bug still occurs, maybe alter the offset vectors.

-------------------------------------------------------------------------------

I'm not sure if this solution is the best, so please check it out before you
use
it. And as always if I did something wrong, forget about the patch!

with best regards, 

Tobias Kuehnhammer

-- 
Configure bugmail: https://bugzilla.icculus.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the QA contact for the bug.