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-   -   Solved How is PVS ( Potentially view set ) calculated for an origin ? (https://forums.alliedmods.net/showthread.php?t=338218)

Natsheh 06-18-2022 13:10
How is PVS ( Potentially view set ) calculated for an origin ?
 
I am trying to check if an origin can be in a player's potenially view set so far i've made this, but its buggy, because it create entities.

PHP Code:
// Is Origin in player's potentially view set?
bool:IsOriginInPlayerPVS(const id, const Float:fOrigin[3])
{
    static iEnt, next, Float:fEntOrigin[3];

    iEnt = create_entity("info_target");

    if( iEnt )
    {
        engfunc(EngFunc_SetOrigin, iEnt, fOrigin);

        next = engfunc(EngFunc_EntitiesInPVS, id);

        while( next )
        {
            pev(next, pev_origin, fEntOrigin);

            if( xs_vec_equal(fOrigin, fEntOrigin) )
            {
                set_pev(iEnt, pev_flags, FL_KILLME);
                dllfunc(DLLFunc_Think, iEnt);

                return true;
            }

            next = pev(next, pev_chain);
        }

        set_pev(iEnt, pev_flags, FL_KILLME);
        dllfunc(DLLFunc_Think, iEnt);

        return false;
    }

    return false;
} 
Edit: Looking through Xash3D engine i found out this native Mod_GetPVSForPoint but i couldn't locate its function.

Shadows Adi 06-18-2022 14:27
Re: How is PVS ( Potentially view set ) calculated for an origin ?
 
Check this out: https://github.com/dreamstalker/rehl....cpp#L763-L804

Natsheh 06-18-2022 17:41
Re: How is PVS ( Potentially view set ) calculated for an origin ?
 
Alright i set up a new function to find if the origin is in player PVS but now i am having problems with getting signatures :)

PHP Code:
// Is Origin in player's potentially view set?
bool:IsOriginInPlayerPVS(const id, const Float:fMessageOrigin[3])
{
    static Float:fvPlayerOrigin[3], leafnum, mask, bitNumber;

    leafnum = OrpheuCall( SV_PointLeafnum, fMessageOrigin );
    mask = OrpheuCall( CM_LeafPVS, leafnum );

    if( !mask )
    {
        return true;
    }

    pev(id, pev_origin, fvPlayerOrigin);
    bitNumber = OrpheuCall( SV_PointLeafnum, fvPlayerOrigin );

    if( ((mask |= ((bitNumber - 1) >> 3)) & (1 << ((bitNumber - 1) & 7))) )
    {
        return true;
    }

    return false;
} 

Shadows Adi 06-18-2022 17:54
Re: How is PVS ( Potentially view set ) calculated for an origin ?
 
HLDS / reHLDS? Version?

Natsheh 06-18-2022 19:31
Re: How is PVS ( Potentially view set ) calculated for an origin ?
 
I found a simpler way to do it using SV_ValidClientMulticast.

PHP Code:
// Is Origin in player's potentially view set?
bool:IsOriginInPlayerPVS(const id, Float:fMessageOrigin[3])
{
    static leafnum;
    leafnum = OrpheuCall( SV_PointLeafnum, fMessageOrigin );

    return bool: OrpheuCall( SV_ValidClientMulticast, id, leafnum, MSG_PVS );
} 
all i need are the signatures :( ReHLDS latest version REHLDS_v311-776

iceeedr 06-18-2022 23:57
Re: How is PVS ( Potentially view set ) calculated for an origin ?
 
Quote:
Originally Posted by Natsheh (Post 2781913)
I found a simpler way to do it using SV_ValidClientMulticast.

PHP Code:
// Is Origin in player's potentially view set?
bool:IsOriginInPlayerPVS(const id, Float:fMessageOrigin[3])
{
    static leafnum;
    leafnum = OrpheuCall( SV_PointLeafnum, fMessageOrigin );

    return bool: OrpheuCall( SV_ValidClientMulticast, id, leafnum, MSG_PVS );
} 
all i need are the signatures :( ReHLDS latest version REHLDS_v311-776
Dumb question, you've tried it, I haven't tested it so I can't confirm.

PHP Code:
bool:IsOriginInPlayerPVS(const id, Float:fMessageOrigin[3])
{
        static leafnum;
        leafnum = SV_PointLeafnum(fMessageOrigin)

        return bool: SV_ValidClientMulticast( id, leafnum, MSG_PVS );
} 

Shadows Adi 06-19-2022 06:26
Re: How is PVS ( Potentially view set ) calculated for an origin ?
 
Here are the signatures for
SV_ValidClientMulticast ( the linux signature could not work, because I found just a reference from this function, not it's offset ):
PHP Code:
{
    "name" : "SV_ValidClientMulticast",
    "library" : "engine",
    "arguments" :
    [
        {
            "type" : "int"
        },
        {
            "type" : "int"
        },
        {
            "type" : "int"
        }
    ],
    "return" :
    {
        "type" : "bool"
    },
    "identifiers" :
    [
        {
            "os"    : "windows",
            "mod"   : "cstrike",
            "value" : [0x55, 0x8B, "*", 0x51, 0x56, 0x33, "*", 0x57, 0x8B, 0xF9]
        },
        {
            "os"    : "linux",
            "mod"   : "cstrike",
            "value" : [0x4D, 0x55, "*", 0x54, 0x49, 0x43, 0x41, 0x53, 0x54, "*", 0x20, 0x45, 0x2, 0x72, "*", 0x72, 0x20, 0x25, 0x64, 0x21]
        }
    ]
} 
and

SV_PointLeafnum:
PHP Code:
{
    "name" : "SV_PointLeafnum",
    "library" : "engine",
    "arguments" :
    [
        {
            "type" : "float"
        }
    ],
    "return" :
    {
        "type" : "int"
    },
    "identifiers" :
    [
        {
            "os"    : "windows",
            "mod"   : "cstrike",
            "value" : [0x51, 0x8B, 0x15, 0xB0, "*", "*", 0x04, 0xE8]
        },
        {
            "os"    : "linux",
            "mod"   : "cstrike",
            "value" : 0x6A6B4
        }
    ]
} 
Tested on windows and linux ( but with the problem mentioned above for 'SV_ValidClientMulticast' )

Natsheh 06-19-2022 11:16
Re: How is PVS ( Potentially view set ) calculated for an origin ?
 
Anyway to get the address of SV_ValidClientMulticast ? i already found a ref tho but i don't know how to use it to find the actual function.

Can anyone disassemble the engine using linux OS. ?

Natsheh 06-21-2022 17:22
Re: How is PVS ( Potentially view set ) calculated for an origin ?
 
Solved: Using the first method in post #1 but creating the entity once and never removing it also moving it around for players prediction.


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