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game/server/cstrike/bot/states/cs_bot_use_entity.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+// Author: Michael S. Booth (mike@turtlerockstudios.com), 2003
+
+#include "cbase.h"
+#include "cs_bot.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+
+/**
+ * Face the entity and "use" it
+ * NOTE: This state assumes we are standing in range of the entity to be used, with no obstructions.
+ */
+void UseEntityState::OnEnter( CCSBot *me )
+{
+}
+
+void UseEntityState::OnUpdate( CCSBot *me )
+{
+	// in the very rare situation where two or more bots "used" a hostage at the same time,
+	// one bot will fail and needs to time out of this state
+	const float useTimeout = 5.0f;
+	if (me->GetStateTimestamp() - gpGlobals->curtime > useTimeout)
+	{
+		me->Idle();
+		return;
+	}
+
+	// look at the entity
+	Vector pos = m_entity->EyePosition();
+	me->SetLookAt( "Use entity", pos, PRIORITY_HIGH );
+
+	// if we are looking at the entity, "use" it and exit
+	if (me->IsLookingAtPosition( pos ))
+	{
+		if (TheCSBots()->GetScenario() == CCSBotManager::SCENARIO_RESCUE_HOSTAGES && 
+			me->GetTeamNumber() == TEAM_CT &&
+			me->GetTask() == CCSBot::COLLECT_HOSTAGES)
+		{
+			// we are collecting a hostage, assume we were successful - the update check will correct us if we weren't
+			me->IncreaseHostageEscortCount();
+		}
+
+		me->UseEnvironment();
+		me->Idle();
+	}
+}
+
+void UseEntityState::OnExit( CCSBot *me )
+{
+	me->ClearLookAt();
+	me->ResetStuckMonitor();
+}
+
+
+