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119 lines
3.0 KiB
119 lines
3.0 KiB
5 years ago
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// BehaviorBackUp.h
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// Back up for a short duration
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// Author: Michael Booth, March 2007
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//========= Copyright Valve Corporation, All rights reserved. ============//
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#ifndef _BEHAVIOR_BACK_UP_H_
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#define _BEHAVIOR_BACK_UP_H_
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//----------------------------------------------------------------------------------------------
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/**
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* Move backwards for a short duration away from a given position.
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* Useful to dislodge ourselves if we get stuck while following our path.
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*/
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template < typename Actor >
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class BehaviorBackUp : public Action< Actor >
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{
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public:
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BehaviorBackUp( const Vector &avoidPos );
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virtual ActionResult< Actor > OnStart( Actor *me, Action< Actor > *priorAction );
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virtual ActionResult< Actor > Update( Actor *me, float interval );
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virtual EventDesiredResult< Actor > OnStuck( Actor *me );
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virtual const char *GetName( void ) const { return "BehaviorBackUp"; }
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private:
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CountdownTimer m_giveUpTimer;
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CountdownTimer m_backupTimer;
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CountdownTimer m_jumpTimer;
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Vector m_way;
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Vector m_avoidPos;
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};
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//----------------------------------------------------------------------------------------------
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template < typename Actor >
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inline BehaviorBackUp< Actor >::BehaviorBackUp( const Vector &avoidPos )
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{
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m_avoidPos = avoidPos;
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}
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//----------------------------------------------------------------------------------------------
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template < typename Actor >
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inline ActionResult< Actor > BehaviorBackUp< Actor >::OnStart( Actor *me, Action< Actor > *priorAction )
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{
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ILocomotion *mover = me->GetLocomotionInterface();
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// don't back off if we're on a ladder
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if ( mover && mover->IsUsingLadder() )
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{
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return Done();
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}
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float backupTime = RandomFloat( 0.3f, 0.5f );
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m_backupTimer.Start( backupTime );
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m_jumpTimer.Start( 1.5f * backupTime );
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m_giveUpTimer.Start( 2.5f * backupTime );
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m_way = me->GetPosition() - m_avoidPos;
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m_way.NormalizeInPlace();
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return Continue();
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}
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//----------------------------------------------------------------------------------------------
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template < typename Actor >
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inline ActionResult< Actor > BehaviorBackUp< Actor >::Update( Actor *me, float interval )
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{
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if ( m_giveUpTimer.IsElapsed() )
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{
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return Done();
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}
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// if ( m_jumpTimer.HasStarted() && m_jumpTimer.IsElapsed() )
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// {
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// me->GetLocomotionInterface()->Jump();
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// m_jumpTimer.Invalidate();
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// }
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ILocomotion *mover = me->GetLocomotionInterface();
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if ( mover )
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{
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Vector goal;
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if ( m_backupTimer.IsElapsed() )
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{
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// move towards bad spot
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goal = m_avoidPos; // me->GetPosition() - 100.0f * m_way;
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}
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else
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{
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// move away from bad spot
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goal = me->GetPosition() + 100.0f * m_way;
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}
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mover->Approach( goal );
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}
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return Continue();
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}
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//----------------------------------------------------------------------------------------------
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template < typename Actor >
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inline EventDesiredResult< Actor > BehaviorBackUp< Actor >::OnStuck( Actor *me )
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{
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return TryToSustain( RESULT_IMPORTANT, "Stuck while trying to back up" );
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}
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#endif // _BEHAVIOR_BACK_UP_H_
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