aiMobState_Ramble.cpp

/*

Jump'n'Run Engine
http://www.atanaslaskov.com/jnr/

BSD LICENSE
Copyright (c) 2007-2013, Atanas Laskov
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL ATANAS LASKOV BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/

#include "stdafx.h"
#include "ai.h"

void aiMobState_Ramble::load(laFileParser *fp)
{
    aiMobState::load(fp);

    //Load global params
    //
    fp->readBool(&_bJumpy);
    fp->readBool(&_bTrapSenitive);
}

void aiMobState_Ramble::perceive_active( std::string strID_Old )
{
    laMonster* pMonster = (laMonster*) self();
    laPlayer* pPlayer   = (laPlayer*) player();

    pMonster->getPivot()-> bSimulateGravitation = M_TRUE;
    pMonster->move(+1);
    pMonster->_fxTrail.enable();
}

void aiMobState_Ramble::perceive_inactive( std::string strID_New )
{
}

aiMobState_Ramble::~aiMobState_Ramble(void)
{
}

// The player is within monster's territory
//
void aiMobState_Ramble::perceive_InTerritory(unsigned state)
{
    laMonster* pMonster = (laMonster*) self();
    laPlayer* pPlayer   = (laPlayer*) player();

    //_select_creature();
}

// The player is in attack range
//
void aiMobState_Ramble::perceive_InRange(unsigned state)
{
    laMonster* pMonster = (laMonster*) self();
    laPlayer* pPlayer   = (laPlayer*) player();

    switch(state)
    {
    case PERCEPT_SET:
        _select_creature( M_TRUE );
        break;

    case PERCEPT_RESET:
        _select_creature( M_FALSE );
        break;

    case PERCEPT_HOLD:
        pPlayer->ctlBattleMode();
        break;
    }
}

// Default
//
void aiMobState_Ramble::perceive(unsigned state, M_BOOL global, unsigned id, aiPerceptData data)
{
    laMonster* pMonster = (laMonster*) self();
    //laPlayer* pPlayer   = (laPlayer*) player();

    // Update direction
    // NOTE: Gravity is on for this AI type, so there is direct control only along X;
    // The Y direction can be controlled not directly, but by performing jumps/somersaults
    //
    int direction = pMonster->getMoveDirection();
    pMonster->move( this->_update_direction( direction ) );

    aiMobState::perceive(state, global, id, data);
}

// Determine mov dir
//
int aiMobState_Ramble::_update_direction( int dir)
{
    laMonster* pMonster = (laMonster*) self();

    if( _chasm_infront() )
    {
        dir = -1* dir;      // => reverse dir
    }
    else if( _obstacle_infront() )
    {
        if( _obstacle_above() || (!_bJumpy) )   // .. and obstace above or don't care
            dir = -1* dir;                      // => reverse dir
        else                                    // .. no obstacle above
            pMonster->jump();                   // => jump
    }
    else
    {
        // no obstacle => patrol within territory range
        //
        if( !_within_left_range() )
            dir = +1;

        if( !_within_right_range() )
            dir = -1;
    }
    return dir;
}

M_BOOL aiMobState_Ramble::_obstacle_infront()
{
    laMonster* pMonster = (laMonster*) self();
    laPivot *pMobPivot = pMonster->getPivot();

    int direction = pMonster->getMoveDirection();
    laPoint3 vTentacle(direction*M_UNIT*2, 0, 0);
    laPivot vPivot = (*pMobPivot);

    vPivot[1] -= M_UNIT * 0.3;  // nudge up a bit to obtain a safe margin
    vTentacle = vPivot.projectVector(vTentacle);

    if( vTentacle.lenght() <= (vPivot.size.x()*0.5 + M_UNIT*0.15) ) return M_TRUE;
    else return M_FALSE;
}

M_BOOL aiMobState_Ramble::_obstacle_above()
{
    laMonster* pMonster = (laMonster*) self();
    laPivot *pMobPivot = pMonster->getPivot();

    int direction = pMonster->getMoveDirection();
    laPoint3 vTentacle(direction*M_UNIT, 0, 0);
    laPivot vPivot = (*pMobPivot);

    vPivot[1] -= M_UNIT * 1.5;
    vTentacle = vPivot.projectVector(vTentacle);

    if( vTentacle.lenght() <= M_UNIT*0.5 ) return M_TRUE;
    else return M_FALSE;
}

M_BOOL aiMobState_Ramble::_chasm_infront()
{
    laMonster* pMonster = (laMonster*) self();
    laPivot *pMobPivot = pMonster->getPivot();

    int direction = pMonster->getMoveDirection();
    laPoint3 vTentacle(0, +3*M_UNIT, 0);    //should point downwards
    laPivot vPivot = (*pMobPivot);
    M_BOOL bTrap = M_FALSE;

    vPivot[0] += direction * vPivot.size.x()*0.2;
    vTentacle = vPivot.projectVector(vTentacle, &bTrap);

    if( (bTrap && _bTrapSenitive) || (vTentacle.lenght() >= M_UNIT*1.2) ) return M_TRUE;
    else return M_FALSE;
}