C++ CAI_Node::Lock方法代码示例

void CASW_Alien_Jumper::LockJumpNode( void )
{
	if ( HasSpawnFlags( SF_ANTLION_USE_GROUNDCHECKS ) == false )
		 return;
	
	if ( GetNavigator()->GetPath() == NULL )
		 return;

	if ( asw_test_new_alien_jump.GetBool() == false )
		 return;

	AI_Waypoint_t *pWaypoint = GetNavigator()->GetPath()->GetCurWaypoint();

	while ( pWaypoint )
	{
		AI_Waypoint_t *pNextWaypoint = pWaypoint->GetNext();
		if ( pNextWaypoint && pNextWaypoint->NavType() == NAV_JUMP && pWaypoint->iNodeID != NO_NODE )
		{
			CAI_Node *pNode = GetNavigator()->GetNetwork()->GetNode( pWaypoint->iNodeID );

			if ( pNode )
			{
				//NDebugOverlay::Box( pNode->GetOrigin(), Vector( -16, -16, -16 ), Vector( 16, 16, 16 ), 255, 0, 0, 0, 2 );
				pNode->Lock( 0.5f );
				break;
			}
		}
		else
		{
			pWaypoint = pWaypoint->GetNext();
		}
	}
}

int CAI_TacticalServices::FindCoverNode(const Vector &vNearPos, const Vector &vThreatPos, const Vector &vThreatEyePos, float flMinDist, float flMaxDist )
{
	if ( !CAI_NetworkManager::NetworksLoaded() )
		return NO_NODE;

	AI_PROFILE_SCOPE( CAI_TacticalServices_FindCoverNode );

	MARK_TASK_EXPENSIVE();

	DebugFindCover( NO_NODE, GetOuter()->EyePosition(), vThreatEyePos, 0, 255, 255 );

	int iMyNode = GetPathfinder()->NearestNodeToPoint( vNearPos );

	if ( iMyNode == NO_NODE )
	{
		Vector pos = GetOuter()->GetAbsOrigin();
		DevWarning( 2, "FindCover() - %s has no nearest node! (Check near %f %f %f)\n", GetEntClassname(), pos.x, pos.y, pos.z);
		return NO_NODE;
	}

	if ( !flMaxDist )
	{
		// user didn't supply a MaxDist, so work up a crazy one.
		flMaxDist = 784;
	}

	if ( flMinDist > 0.5 * flMaxDist)
	{
		flMinDist = 0.5 * flMaxDist;
	}

	// ------------------------------------------------------------------------------------
	// We're going to search for a cover node by expanding to our current node's neighbors
	// and then their neighbors, until cover is found, or all nodes are beyond MaxDist
	// ------------------------------------------------------------------------------------
	AI_NearNode_t *pBuffer = (AI_NearNode_t *)stackalloc( sizeof(AI_NearNode_t) * GetNetwork()->NumNodes() );
	CNodeList list( pBuffer, GetNetwork()->NumNodes() );
	CVarBitVec wasVisited(GetNetwork()->NumNodes());	// Nodes visited

	// mark start as visited
	list.Insert( AI_NearNode_t(iMyNode, 0) ); 
	wasVisited.Set( iMyNode );
	float flMinDistSqr = flMinDist*flMinDist;
	float flMaxDistSqr = flMaxDist*flMaxDist;

	static int nSearchRandomizer = 0;		// tries to ensure the links are searched in a different order each time;

	// Search until the list is empty
	while( list.Count() )
	{
		// Get the node that is closest in the number of steps and remove from the list
		int nodeIndex = list.ElementAtHead().nodeIndex;
		list.RemoveAtHead();

		CAI_Node *pNode = GetNetwork()->GetNode(nodeIndex);
		Vector nodeOrigin = pNode->GetPosition(GetHullType());

		float dist = (vNearPos - nodeOrigin).LengthSqr();
		if (dist >= flMinDistSqr && dist < flMaxDistSqr)
		{
			Activity nCoverActivity = GetOuter()->GetCoverActivity( pNode->GetHint() );
			Vector vEyePos = nodeOrigin + GetOuter()->EyeOffset(nCoverActivity);

			if ( GetOuter()->IsValidCover( nodeOrigin, pNode->GetHint() ) )
			{
				// Check if this location will block the threat's line of sight to me
				if (GetOuter()->IsCoverPosition(vThreatEyePos, vEyePos))
				{
					// --------------------------------------------------------
					// Don't let anyone else use this node for a while
					// --------------------------------------------------------
					pNode->Lock( 1.0 );

					if ( pNode->GetHint() && ( pNode->GetHint()->HintType() == HINT_TACTICAL_COVER_MED || pNode->GetHint()->HintType() == HINT_TACTICAL_COVER_LOW ) )
					{
						if ( GetOuter()->GetHintNode() )
						{
							GetOuter()->GetHintNode()->Unlock(GetOuter()->GetHintDelay(GetOuter()->GetHintNode()->HintType()));
							GetOuter()->SetHintNode( NULL );
						}

						GetOuter()->SetHintNode( pNode->GetHint() );
					}

					// The next NPC who searches should use a slight different pattern
					nSearchRandomizer = nodeIndex;
					DebugFindCover( pNode->GetId(), vEyePos, vThreatEyePos, 0, 255, 0 );
					return nodeIndex;
				}
				else
				{
					DebugFindCover( pNode->GetId(), vEyePos, vThreatEyePos, 255, 0, 0 );
				}
			}
			else
			{
				DebugFindCover( pNode->GetId(), vEyePos, vThreatEyePos, 0, 0, 255 );
			}
		}

//.........这里部分代码省略.........