UTIL_EntitiesInBox
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UTIL_EntitiesInBox is a UTIL provided in the Source code for finding entities within a specified box. It takes an Entity List, Mins, Maxes, and flags, returning a count of entities, as well as a list of the entities.
Usage
//-----------------------------------------------------------------------------
// Purpose: Returns the number of entities in the box, plus an array of pointers to the entities.
//
// Input : CBaseEntity - *pList | A pointer to an array, the function will store a pointer to the Entities it finds in this array.
// Input : int - listMax | Maximum number of entities to return
// Input : Vector - &mins | The mins of a box to check. World space coordinate.
// Input : Vector - &maxs | The maxs of a box to check. World space coordinate.
// Input : int - flagmask |
// Output : *pList
// Output : int - Returns the amount of entities it finds
//-----------------------------------------------------------------------------
inline int UTIL_EntitiesInBox( CBaseEntity **pList, int listMax, const Vector &mins, const Vector &maxs, int flagMask )
//-----------------------------------------------------------------------------
// Purpose: Returns the number of entities in the box.
//
// Input : Vector - &mins | The mins of a box to check. World space coordinate.
// Input : Vector - &maxs | The maxs of a box to check. World space coordinate.
// Input : CFlaggedEntitiesEnum *pEnum | TODO
// Output : int - Returns the amount of entities it finds
//-----------------------------------------------------------------------------
int UTIL_EntitiesInBox( const Vector &mins, const Vector &maxs, CFlaggedEntitiesEnum *pEnum );
flagmask is avaible in const.h, lines 97-132
Examples
//Create an array of CBaseEntity pointers
CBaseEntity* pList[20];
//Put the pointers in the pList, and get how many entities there are
int count = UTIL_EntitiesInBox( pList, 20, spawnOrigin + NAI_Hull::Mins( HULL_MEDIUM ), spawnOrigin + NAI_Hull::Maxs( HULL_MEDIUM ), 0 );
//Iterate over all the possible targets
for ( int i = 0; i < count; i++ )
{
//If the particular entity's movetype isn't MOVETYPE_VPHYSICS, skip the rest of this loop, and go to the next entity
if ( pList[i]->GetMoveType() != MOVETYPE_VPHYSICS )
continue;
if ( PhysGetEntityMass( pList[i] ) > ANTLION_MAKER_BLOCKED_MASS )
{
bBlocked = true;
iNumBlocked++;
pBlocker = pList[i];
if ( pTestHint == pNode )
{
bChosenHintBlocked = true;
}
break;
}
}
//This uses the overloaded function, and only returns the number of entities.
CBaseEntity *entityList[64];
Vector range(ROLLERMINE_WAKEUP_DIST,ROLLERMINE_WAKEUP_DIST,64);
int boxCount = UTIL_EntitiesInBox( entityList, ARRAYSIZE(entityList), GetAbsOrigin()-range, GetAbsOrigin()+range, FL_NPC );
