CBaseEntity *CBasePlayer::FindUseEntity()
{
Vector forward, up;
EyeVectors( &forward, NULL, &up );
trace_t tr;
// Search for objects in a sphere (tests for entities that are not solid, yet still useable)
Vector searchCenter = EyePosition();
// NOTE: Some debris objects are useable too, so hit those as well
// A button, etc. can be made out of clip brushes, make sure it's +useable via a traceline, too.
int useableContents = MASK_SOLID | CONTENTS_DEBRIS | CONTENTS_PLAYERCLIP;
#ifdef CSTRIKE_DLL
useableContents = MASK_NPCSOLID_BRUSHONLY | MASK_OPAQUE_AND_NPCS;
#endif
#ifdef HL1_DLL
useableContents = MASK_SOLID;
#endif
#ifndef CLIENT_DLL
CBaseEntity *pFoundByTrace = NULL;
#endif
// UNDONE: Might be faster to just fold this range into the sphere query
CBaseEntity *pObject = NULL;
float nearestDist = FLT_MAX;
// try the hit entity if there is one, or the ground entity if there isn't.
CBaseEntity *pNearest = NULL;
const int NUM_TANGENTS = 8;
// trace a box at successive angles down
// forward, 45 deg, 30 deg, 20 deg, 15 deg, 10 deg, -10, -15
const float tangents[NUM_TANGENTS] = { 0, 1, 0.57735026919f, 0.3639702342f, 0.267949192431f, 0.1763269807f, -0.1763269807f, -0.267949192431f };
for ( int i = 0; i < NUM_TANGENTS; i++ )
{
if ( i == 0 )
{
UTIL_TraceLine( searchCenter, searchCenter + forward * 1024, useableContents, this, COLLISION_GROUP_NONE, &tr );
}
else
{
Vector down = forward - tangents[i]*up;
VectorNormalize(down);
UTIL_TraceHull( searchCenter, searchCenter + down * 72, -Vector(16,16,16), Vector(16,16,16), useableContents, this, COLLISION_GROUP_NONE, &tr );
}
pObject = tr.m_pEnt;
#ifndef CLIENT_DLL
pFoundByTrace = pObject;
#endif
bool bUsable = IsUseableEntity(pObject, 0);
while ( pObject && !bUsable && pObject->GetMoveParent() )
{
pObject = pObject->GetMoveParent();
bUsable = IsUseableEntity(pObject, 0);
}
if ( bUsable )
{
Vector delta = tr.endpos - tr.startpos;
float centerZ = CollisionProp()->WorldSpaceCenter().z;
delta.z = IntervalDistance( tr.endpos.z, centerZ + CollisionProp()->OBBMins().z, centerZ + CollisionProp()->OBBMaxs().z );
float dist = delta.Length();
if ( dist < PLAYER_USE_RADIUS )
{
#ifndef CLIENT_DLL
if ( sv_debug_player_use.GetBool() )
{
NDebugOverlay::Line( searchCenter, tr.endpos, 0, 255, 0, true, 30 );
NDebugOverlay::Cross3D( tr.endpos, 16, 0, 255, 0, true, 30 );
}
if ( pObject->MyNPCPointer() && pObject->MyNPCPointer()->IsPlayerAlly( this ) )
{
// If about to select an NPC, do a more thorough check to ensure
// that we're selecting the right one from a group.
pObject = DoubleCheckUseNPC( pObject, searchCenter, forward );
}
#endif
if ( sv_debug_player_use.GetBool() )
{
Msg( "Trace using: %s\n", pObject ? pObject->GetDebugName() : "no usable entity found" );
}
pNearest = pObject;
// if this is directly under the cursor just return it now
if ( i == 0 )
return pObject;
}
}
}
// check ground entity first
// if you've got a useable ground entity, then shrink the cone of this search to 45 degrees
// otherwise, search out in a 90 degree cone (hemisphere)
if ( GetGroundEntity() && IsUseableEntity(GetGroundEntity(), FCAP_USE_ONGROUND) )
{
pNearest = GetGroundEntity();
}
if ( pNearest )
{
// estimate nearest object by distance from the view vector
Vector point;
pNearest->CollisionProp()->CalcNearestPoint( searchCenter, &point );
nearestDist = CalcDistanceToLine( point, searchCenter, forward );
if ( sv_debug_player_use.GetBool() )
{
Msg("Trace found %s, dist %.2f\n", pNearest->GetClassname(), nearestDist );
}
}
for ( CEntitySphereQuery sphere( searchCenter, PLAYER_USE_RADIUS ); ( pObject = sphere.GetCurrentEntity() ) != NULL; sphere.NextEntity() )
{
if ( !pObject )
continue;
if ( !IsUseableEntity( pObject, FCAP_USE_IN_RADIUS ) )
continue;
// see if it's more roughly in front of the player than previous guess
Vector point;
pObject->CollisionProp()->CalcNearestPoint( searchCenter, &point );
Vector dir = point - searchCenter;
VectorNormalize(dir);
float dot = DotProduct( dir, forward );
// Need to be looking at the object more or less
if ( dot < 0.8 )
continue;
float dist = CalcDistanceToLine( point, searchCenter, forward );
if ( sv_debug_player_use.GetBool() )
{
Msg("Radius found %s, dist %.2f\n", pObject->GetClassname(), dist );
}
if ( dist < nearestDist )
{
// Since this has purely been a radius search to this point, we now
// make sure the object isn't behind glass or a grate.
trace_t trCheckOccluded;
UTIL_TraceLine( searchCenter, point, useableContents, this, COLLISION_GROUP_NONE, &trCheckOccluded );
if ( trCheckOccluded.fraction == 1.0 || trCheckOccluded.m_pEnt == pObject )
{
pNearest = pObject;
nearestDist = dist;
}
}
}
#ifndef CLIENT_DLL
if ( !pNearest )
{
// Haven't found anything near the player to use, nor any NPC's at distance.
// Check to see if the player is trying to select an NPC through a rail, fence, or other 'see-though' volume.
trace_t trAllies;
UTIL_TraceLine( searchCenter, searchCenter + forward * PLAYER_USE_RADIUS, MASK_OPAQUE_AND_NPCS, this, COLLISION_GROUP_NONE, &trAllies );
if ( trAllies.m_pEnt && IsUseableEntity( trAllies.m_pEnt, 0 ) && trAllies.m_pEnt->MyNPCPointer() && trAllies.m_pEnt->MyNPCPointer()->IsPlayerAlly( this ) )
{
// This is an NPC, take it!
pNearest = trAllies.m_pEnt;
}
}
if ( pNearest && pNearest->MyNPCPointer() && pNearest->MyNPCPointer()->IsPlayerAlly( this ) )
{
pNearest = DoubleCheckUseNPC( pNearest, searchCenter, forward );
}
if ( sv_debug_player_use.GetBool() )
{
if ( !pNearest )
{
NDebugOverlay::Line( searchCenter, tr.endpos, 255, 0, 0, true, 30 );
NDebugOverlay::Cross3D( tr.endpos, 16, 255, 0, 0, true, 30 );
}
else if ( pNearest == pFoundByTrace )
{
NDebugOverlay::Line( searchCenter, tr.endpos, 0, 255, 0, true, 30 );
NDebugOverlay::Cross3D( tr.endpos, 16, 0, 255, 0, true, 30 );
}
else
{
NDebugOverlay::Box( pNearest->WorldSpaceCenter(), Vector(-8, -8, -8), Vector(8, 8, 8), 0, 255, 0, true, 30 );
}
}
#endif
if ( sv_debug_player_use.GetBool() )
{
Msg( "Radial using: %s\n", pNearest ? pNearest->GetDebugName() : "no usable entity found" );
}
return pNearest;
}
bool CSDKPlayer::PlayerUse()
{
#ifdef GAME_DLL
// Was use pressed or released?
if ( ((m_nButtons | m_afButtonPressed | m_afButtonReleased) & IN_USE) && !IsObserver() )
{
Vector forward, up;
EyeVectors( &forward, NULL, &up );
Vector vecSearchCenter = EyePosition();
CBaseEntity *pObject = nullptr;
CBaseEntity *pNearest = nullptr;
float flNearest = FLT_MAX;
// Look for grenades so we can prioritize picking them up first.
for ( CEntitySphereQuery sphere( vecSearchCenter, PLAYER_USE_RADIUS ); ( pObject = sphere.GetCurrentEntity() ) != NULL; sphere.NextEntity() )
{
if ( !pObject )
continue;
if ( !IsUseableEntity( pObject, FCAP_USE_IN_RADIUS ) )
continue;
CWeaponSDKBase* pWeapon = dynamic_cast<CWeaponSDKBase*>(pObject);
if (!pWeapon)
continue;
if (pWeapon->GetWeaponID() != SDK_WEAPON_GRENADE)
continue;
// If we're full up on grenades, pass over to whatever other weapons are lying around.
if (!g_pGameRules->CanHavePlayerItem(this, pWeapon))
continue;
// see if it's more roughly in front of the player than previous guess
Vector point;
pObject->CollisionProp()->CalcNearestPoint( vecSearchCenter, &point );
Vector dir = point - vecSearchCenter;
VectorNormalize(dir);
float dot = DotProduct( dir, forward );
// Need to be looking at the object more or less
if ( dot < 0.8 )
continue;
float dist = CalcDistanceToLine( point, vecSearchCenter, forward );
ConVarRef sv_debug_player_use("sv_debug_player_use");
if ( sv_debug_player_use.GetBool() )
{
Msg("Radius found %s, dist %.2f\n", pObject->GetClassname(), dist );
}
// Not worried about shit being behind a wall at this point.
// Just greedily gobble up all nearby grenades since there's
// no penalty to the player for doing so.
if ( dist < flNearest )
{
pNearest = pObject;
flNearest = dist;
}
}
if (pNearest)
{
// This is a grenade. Use it to pick it up.
variant_t emptyVariant;
pNearest->AcceptInput( "Use", this, this, emptyVariant, USE_TOGGLE );
return true;
}
}
#endif
bool bUsed = BaseClass::PlayerUse();
if (bUsed)
return bUsed;
if (!(m_afButtonPressed & IN_USE))
return false;
if (!IsAlive())
return false;
return false;
}
