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game/server/tf2/info_buildpoint.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: Map entity that allows players to build objects on it
+//
+// $NoKeywords: $
+//=============================================================================//
+#include "cbase.h"
+#include "EntityOutput.h"
+#include "EntityList.h"
+#include "tf_team.h"
+#include "baseentity.h"
+#include "info_buildpoint.h"
+#include "tf_gamerules.h"
+
+// Spawnflags
+const int SF_BUILDPOINT_ALLOW_ALL_GUNS		= 0x01;	// Allow all manned guns to be built on this point
+const int SF_BUILDPOINT_ALLOW_VEHICLES		= 0x02;	// Allow all vehicles to be built on this point
+
+BEGIN_DATADESC( CInfoBuildPoint )
+
+	// keys 
+	DEFINE_KEYFIELD_NOT_SAVED( m_iszAllowedObject, FIELD_STRING, "AllowedObject" ),
+
+END_DATADESC()
+
+LINK_ENTITY_TO_CLASS( info_buildpoint, CInfoBuildPoint );
+
+// List of buildpoints
+CUtlVector<CInfoBuildPoint*> g_MapDefinedBuildPoints;
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CInfoBuildPoint::Spawn( void )
+{
+	g_MapDefinedBuildPoints.AddToTail( this );
+
+	m_iAllowedObjectType = -1;
+	if ( m_iszAllowedObject != NULL_STRING )
+	{
+		for ( int i = 0; i < OBJ_LAST; i++ )
+		{
+			if ( !Q_strcmp( STRING(m_iszAllowedObject), GetObjectInfo(i)->m_pClassName ) )
+			{
+				m_iAllowedObjectType = i;
+				break;
+			}
+		}
+	}
+
+	BaseClass::Spawn();
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CInfoBuildPoint::UpdateOnRemove( void )
+{
+	g_MapDefinedBuildPoints.FindAndRemove( this );
+	BaseClass::UpdateOnRemove();
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Tell me how many build points you have
+//-----------------------------------------------------------------------------
+int	CInfoBuildPoint::GetNumBuildPoints( void ) const
+{
+	return 1;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Give me the origin & angles of the specified build point
+//-----------------------------------------------------------------------------
+bool CInfoBuildPoint::GetBuildPoint( int iPoint, Vector &vecOrigin, QAngle &vecAngles )
+{
+	ASSERT( iPoint <= GetNumBuildPoints() );
+
+	vecOrigin = GetAbsOrigin();
+	vecAngles = GetAbsAngles();
+	return true;
+}
+
+int CInfoBuildPoint::GetBuildPointAttachmentIndex( int iPoint ) const
+{
+	return 0;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Can I build the specified object on the specified build point?
+//-----------------------------------------------------------------------------
+bool CInfoBuildPoint::CanBuildObjectOnBuildPoint( int iPoint, int iObjectType )
+{
+	ASSERT( iPoint <= GetNumBuildPoints() );
+	if ( m_hObjectBuiltOnMe )
+		return false;
+
+	// Manned guns?
+	if ( m_spawnflags & SF_BUILDPOINT_ALLOW_ALL_GUNS )
+	{
+		if ( (iObjectType == OBJ_MANNED_PLASMAGUN) || 
+			 (iObjectType == OBJ_MANNED_MISSILELAUNCHER) || 
+			 (iObjectType == OBJ_MANNED_SHIELD) ||  
+			 (iObjectType == OBJ_SENTRYGUN_PLASMA) )
+			return true;
+	}
+
+	// Vehicles
+	if ( m_spawnflags & SF_BUILDPOINT_ALLOW_VEHICLES )
+	{
+		if ( IsObjectAVehicle(iObjectType) )
+			return true;
+	}
+
+	// Check our unique
+	if ( m_iAllowedObjectType >= 0 && m_iAllowedObjectType == iObjectType )
+		return true;
+
+	return false;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: I've finished building the specified object on the specified build point
+//-----------------------------------------------------------------------------
+void CInfoBuildPoint::SetObjectOnBuildPoint( int iPoint, CBaseObject *pObject )
+{
+	ASSERT( iPoint <= GetNumBuildPoints() );
+	m_hObjectBuiltOnMe = pObject;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Get the number of objects build on this entity
+//-----------------------------------------------------------------------------
+int	CInfoBuildPoint::GetNumObjectsOnMe( void )
+{
+	if ( m_hObjectBuiltOnMe )
+		return 1;
+
+	return 0;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Get the first object that's built on me
+//-----------------------------------------------------------------------------
+CBaseEntity	*CInfoBuildPoint::GetFirstObjectOnMe( void )
+{
+	return m_hObjectBuiltOnMe;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Get the first object of type, return NULL if no such type available
+//-----------------------------------------------------------------------------
+CBaseObject *CInfoBuildPoint::GetObjectOfTypeOnMe( int iObjectType )
+{
+	if ( m_hObjectBuiltOnMe )
+	{
+		if ( m_hObjectBuiltOnMe->ObjectType() == iObjectType )
+			return m_hObjectBuiltOnMe;
+	}
+
+	return NULL;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Remove all objects built on me
+//-----------------------------------------------------------------------------
+void CInfoBuildPoint::RemoveAllObjects( void )
+{
+	UTIL_Remove( m_hObjectBuiltOnMe );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Return the maximum distance that this entity's build points can be snapped to
+//-----------------------------------------------------------------------------
+float CInfoBuildPoint::GetMaxSnapDistance( int iPoint )
+{
+	return 64;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Return true if it's possible that build points on this entity may move in local space (i.e. due to animation)
+//-----------------------------------------------------------------------------
+bool CInfoBuildPoint::ShouldCheckForMovement( void )
+{
+	return false;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: I've finished building the specified object on the specified build point
+//-----------------------------------------------------------------------------
+int	CInfoBuildPoint::FindObjectOnBuildPoint( CBaseObject *pObject )
+{
+	return 1;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Returns an exit point for a vehicle built on a build point...
+//-----------------------------------------------------------------------------
+void CInfoBuildPoint::GetExitPoint( CBaseEntity *pPlayer, int iPoint, Vector *pAbsOrigin, QAngle *pAbsAngles )
+{
+	// FIXME: In future, we may well want to use specific exit attachments here...
+	GetBuildPoint( iPoint, *pAbsOrigin, *pAbsAngles );
+
+	// Move back along the forward direction a bit...
+	Vector vecForward;
+	AngleVectors( *pAbsAngles, &vecForward );
+	*pAbsOrigin -= vecForward * 60;
+
+	// Now select a good spot to drop onto
+	Vector vNewPos;
+	if ( !EntityPlacementTest(pPlayer, *pAbsOrigin, vNewPos, true) )
+	{
+		Warning("Can't find valid place to exit object.\n");
+		return;
+	}
+
+	*pAbsOrigin = vNewPos;
+}