AI_Vagary.cpp

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/*
===========================================================================

Doom 3 GPL Source Code
Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company. 

This file is part of the Doom 3 GPL Source Code (?Doom 3 Source Code?).  

Doom 3 Source Code is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

Doom 3 Source Code is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Doom 3 Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

===========================================================================
*/
/***********************************************************************

game/ai/AI_Vagary.cpp

Vagary specific AI code

***********************************************************************/

#include "../../idlib/precompiled.h"
#pragma hdrstop

#include "../Game_local.h"

class idAI_Vagary : public idAI {
public:
        CLASS_PROTOTYPE( idAI_Vagary );

private:
        void    Event_ChooseObjectToThrow( const idVec3 &mins, const idVec3 &maxs, float speed, float minDist, float offset );
        void    Event_ThrowObjectAtEnemy( idEntity *ent, float speed );
};

const idEventDef AI_Vagary_ChooseObjectToThrow( "vagary_ChooseObjectToThrow", "vvfff", 'e' );
const idEventDef AI_Vagary_ThrowObjectAtEnemy( "vagary_ThrowObjectAtEnemy", "ef" );

CLASS_DECLARATION( idAI, idAI_Vagary )
        EVENT( AI_Vagary_ChooseObjectToThrow,   idAI_Vagary::Event_ChooseObjectToThrow )
        EVENT( AI_Vagary_ThrowObjectAtEnemy,    idAI_Vagary::Event_ThrowObjectAtEnemy )
END_CLASS

/*
================
idAI_Vagary::Event_ChooseObjectToThrow
================
*/
void idAI_Vagary::Event_ChooseObjectToThrow( const idVec3 &mins, const idVec3 &maxs, float speed, float minDist, float offset ) {
        idEntity *      ent;
        idEntity *      entityList[ MAX_GENTITIES ];
        int                     numListedEntities;
        int                     i, index;
        float           dist;
        idVec3          vel;
        idVec3          offsetVec( 0, 0, offset );
        idEntity        *enemyEnt = enemy.GetEntity();

        if ( !enemyEnt ) {
                idThread::ReturnEntity( NULL );
        }

        idVec3 enemyEyePos = lastVisibleEnemyPos + lastVisibleEnemyEyeOffset;
        const idBounds &myBounds = physicsObj.GetAbsBounds();
        idBounds checkBounds( mins, maxs );
        checkBounds.TranslateSelf( physicsObj.GetOrigin() );
        numListedEntities = gameLocal.clip.EntitiesTouchingBounds( checkBounds, -1, entityList, MAX_GENTITIES );

        index = gameLocal.random.RandomInt( numListedEntities );
        for ( i = 0; i < numListedEntities; i++, index++ ) {
                if ( index >= numListedEntities ) {
                        index = 0;
                }
                ent = entityList[ index ];
                if ( !ent->IsType( idMoveable::Type ) ) {
                        continue;
                }

                if ( ent->fl.hidden ) {
                        // don't throw hidden objects
                        continue;
                }

                idPhysics *entPhys = ent->GetPhysics();
                const idVec3 &entOrg = entPhys->GetOrigin();
                dist = ( entOrg - enemyEyePos ).LengthFast();
                if ( dist < minDist ) {
                        continue;
                }

                idBounds expandedBounds = myBounds.Expand( entPhys->GetBounds().GetRadius() );
                if ( expandedBounds.LineIntersection( entOrg, enemyEyePos ) ) {
                        // ignore objects that are behind us
                        continue;
                }

                if ( PredictTrajectory( entPhys->GetOrigin() + offsetVec, enemyEyePos, speed, entPhys->GetGravity(), 
                        entPhys->GetClipModel(), entPhys->GetClipMask(), MAX_WORLD_SIZE, NULL, enemyEnt, ai_debugTrajectory.GetBool() ? 4000 : 0, vel ) ) {
                        idThread::ReturnEntity( ent );
            return;
                }
        }

        idThread::ReturnEntity( NULL );
}

/*
================
idAI_Vagary::Event_ThrowObjectAtEnemy
================
*/
void idAI_Vagary::Event_ThrowObjectAtEnemy( idEntity *ent, float speed ) {
        idVec3          vel;
        idEntity        *enemyEnt;
        idPhysics       *entPhys;

        entPhys = ent->GetPhysics();
        enemyEnt = enemy.GetEntity();
        if ( !enemyEnt ) {
                vel = ( viewAxis[ 0 ] * physicsObj.GetGravityAxis() ) * speed;
        } else {
                PredictTrajectory( entPhys->GetOrigin(), lastVisibleEnemyPos + lastVisibleEnemyEyeOffset, speed, entPhys->GetGravity(), 
                        entPhys->GetClipModel(), entPhys->GetClipMask(), MAX_WORLD_SIZE, NULL, enemyEnt, ai_debugTrajectory.GetBool() ? 4000 : 0, vel );
                vel *= speed;
        }

        entPhys->SetLinearVelocity( vel );

        if ( ent->IsType( idMoveable::Type ) ) {
                idMoveable *ment = static_cast<idMoveable*>( ent );
                ment->EnableDamage( true, 2.5f );
        }
}