source: code/branches/AI_HS15/src/orxonox/controllers/CommonController.cc @ 10774

/*
 *   ORXONOX - the hottest 3D action shooter ever to exist
 *                    > www.orxonox.net <
 *
 *
 *   License notice:
 *
 *   This program 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 2
 *   of the License, or (at your option) any later version.
 *
 *   This program 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 this program; if not, write to the Free Software
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 *   Author:
 *      Fabian 'x3n' Landau
 *   Co-authors:
 *      Dominik Solenicki
 *
 */
#include "controllers/CommonController.h"
#include "core/XMLPort.h"

#include "weaponsystem/WeaponMode.h"
#include "weaponsystem/WeaponPack.h"
#include "weaponsystem/Weapon.h"
#include "weaponsystem/WeaponSlot.h"
#include "weaponsystem/WeaponSlot.h"
#include "worldentities/pawns/SpaceShip.h"


namespace orxonox
{

    RegisterClass(CommonController);
    float SPEED = 0.7f;
    float ROTATEFACTOR = 0.3f;

    CommonController::CommonController(Context* context) : Controller(context)
    {
        this->bSetupWorked = false;

        RegisterObject(CommonController);
    }


    CommonController::~CommonController()
    {
    }

    void CommonController::XMLPort(Element& xmlelement, XMLPort::Mode mode)
    {
        SUPER(CommonController, XMLPort, xmlelement, mode);
        XMLPortParam(CommonController, "formationMode", setFormationModeXML, getFormationModeXML,  xmlelement, mode);

    }
    void CommonController::setFormationModeXML(std::string val)
    {
        const std::string valUpper = getUppercase(val);
        FormationMode::Value value;
        if (valUpper == "VEE")
            value = FormationMode::VEE;
        else if (valUpper == "WALL")
            value = FormationMode::WALL;
        else if (valUpper == "FINGER4")
            value = FormationMode::FINGER4;
        else if (valUpper == "DIAMOND")
            value = FormationMode::DIAMOND;
        else
            ThrowException(ParseError, std::string("Attempting to set an unknown FormationMode: '") + val + "'.");
        this->setFormationMode(value);
       
    }
    std::string CommonController::getFormationModeXML()
    {
        switch (this->formationMode_)
        {
            case FormationMode::VEE:
            {
                return "VEE";
                break;
            }
            case FormationMode::WALL:
            {
                return "WALL";
                break;
            }
            case FormationMode::FINGER4:
            {
                return "FINGER4";
                break;
            }
            case FormationMode::DIAMOND:
            {
                return "DIAMOND";
                break;
            }
            default:
                return "DIAMOND";
                break;

        }
    }

    bool CommonController::setWingman (CommonController* wingman)
    {
        return false;
    }
   
    bool CommonController::hasWingman()
    {
        return true;
    }
    void CommonController::setTarget(ControllableEntity* target)
    {
        this->target_ = target;
        orxout (internal_error) << " TARGET SET " << endl;
        if (target)
            this->targetPosition_ = target->getPosition();
    }



    void CommonController::setTargetPosition(const Vector3& target)
    {
        this->targetPosition_ = target;
        this->bHasTargetPosition_ = true;
    }

    void CommonController::setTargetOrientation(const Quaternion& orient)
    {
        this->targetOrientation_=orient;
        this->bHasTargetOrientation_=true;
    }

    void CommonController::setTargetOrientation(ControllableEntity* target)
    {
        if (target)
            setTargetOrientation(target->getOrientation());
    }

    /*void CommonController::spin()
    {
        this->moveToTargetPosition();
        this->getControllableEntity()->rotateRoll(8.0f);
    }
    void CommonController::turn180()
    {
        Vector2 coord = get2DViewdirection(this->getControllableEntity()->getPosition(), this->getControllableEntity()->getOrientation() * WorldEntity::FRONT, this->getControllableEntity()->getOrientation() * WorldEntity::UP, this->targetPosition_);

        this->getControllableEntity()->rotateYaw(-2.0f * sgn(coord.x) * coord.x*coord.x);
        this->getControllableEntity()->rotatePitch(2.0f * sgn(coord.y) * coord.y*coord.y);

        this->getControllableEntity()->moveFrontBack(SPEED);
    }*/



    //copy the Roll orientation of given Quaternion.
    void CommonController::copyOrientation(const Quaternion& orient)
    {
        //roll angle difference in radian
        float diff=orient.getRoll(false).valueRadians()-(this->getControllableEntity()->getOrientation().getRoll(false).valueRadians());
        while(diff>math::twoPi) diff-=math::twoPi;
        while(diff<-math::twoPi) diff+=math::twoPi;
        this->getControllableEntity()->rotateRoll(diff*ROTATEFACTOR);
    }
    void CommonController::copyTargetOrientation()
    {
        if (bHasTargetOrientation_)
        {   
            copyOrientation(targetOrientation_);
        }
    }




    void CommonController::moveToTargetPosition()
    {
        this->moveToPosition(this->targetPosition_);
    }
    void CommonController::moveToPosition(const Vector3& target)
    {
        float factor = 1;
        if (!this->getControllableEntity())
            return;
        if (this->rank_ == Rank::DIVISIONLEADER)
            factor = 0.8;
        if (this->rank_ == Rank::SECTIONLEADER)
            factor = 0.9;
        
        //100 is (so far) the smallest tolerance (empirically found) that can be reached, 
        //with smaller distance spaceships can't reach position and go circles around it instead
        int tolerance = 60;

        ControllableEntity* entity = this->getControllableEntity();
        Vector2 coord = get2DViewCoordinates
            (entity->getPosition(), 
            entity->getOrientation() * WorldEntity::FRONT, 
            entity->getOrientation() * WorldEntity::UP, 
            target);

        float distance = (target - this->getControllableEntity()->getPosition()).length();

        //rotates should be in range [-1,+1], clamp cuts off all that is not
        float rotateX = clamp(coord.x * 10, -1.0f, 1.0f);
        float rotateY = clamp(coord.y * 10, -1.0f, 1.0f);

        
        if (distance > tolerance)
        {
            //Yaw and Pitch are enough to start facing the target
            this->getControllableEntity()->rotateYaw(-2.0f * ROTATEFACTOR * rotateX);
            this->getControllableEntity()->rotatePitch(2.0f * ROTATEFACTOR * rotateY);

            //300 works, maybe less is better
            if (distance < 400)
            {
                //Change roll when close. When Spaceship faces target, roll doesn't affect it's trajectory
                //It's important that roll is not changed in the process of changing yaw and pitch
                //Wingmen won't face same direction as Leaders, but when Leaders start moving
                //Yaw and Pitch will adapt.
                if (bHasTargetOrientation_)
                {
                    copyTargetOrientation();
                }
            }
                    orxout (internal_error) << "MOVING" <<endl ;

            this->getControllableEntity()->moveFrontBack(1.2f*SPEED*factor);
        }
        else
        {      
            bHasTargetPosition_ = false;
            bHasTargetOrientation_ = false;
        }
    }

    bool CommonController::isCloseAtTarget(float distance) const
    {
        if (!this->getControllableEntity())
            return false;

        if (!this->target_)
            return (this->getControllableEntity()->getPosition().squaredDistance(this->targetPosition_) < distance*distance);
        else
            return (this->getControllableEntity()->getPosition().squaredDistance(this->target_->getPosition()) < distance*distance);
    }
    

    bool CommonController::canFire()
    {
       
        float tolerance = 50.0f;
        
        //check pointers
        if (!this->getControllableEntity() || !this->target_ || !this->target_->getControllableEntity())
            return false;
        
        //check if this points in the direction of target_

        Vector3 myPosition = this->getControllableEntity()->getWorldPosition();
        Vector3 targetPosition = this->target_->getControllableEntity()->getWorldPosition();
        
        Vector3 differenceVector = targetPosition - myPosition;
        float differenceLength = differenceVector.length();
        
        Vector3 myDirection = this->getControllableEntity()->getOrientation() * WorldEntity::FRONT;
        
        float angle = getAngle (myPosition, myDirection, targetPosition);
        float heightLength = sin(angle) * differenceLength;

        if (heightLength > tolerance)
            return false;
       


        //check if there are allies on the way
        Vector3 allyPosition, allyDifference;
        float allyDifferenceLength, allyAngle, allyHeightLength;

        for (ObjectList<CommonController>::iterator it = ObjectList<CommonController>::begin(); it; ++it)
        {
            if (!it->getControllableEntity())
                continue;
            if ((this->getControllableEntity()->getTeam() == (it)->getControllableEntity()->getTeam()))
            {
                allyPosition = it->getControllableEntity()->getWorldPosition();

                allyDifference = allyPosition - myPosition;
                allyDifferenceLength = allyDifference.length();

                allyAngle = getAngle (myPosition, myDirection, allyPosition);

                allyHeightLength = sin(allyAngle) * allyDifferenceLength;

                if (allyAngle > math::pi /2)
                    continue;
                if (allyHeightLength <= tolerance)
                    return false;
            } 
        }

        Pawn* pawn = orxonox_cast<Pawn*>(this->getControllableEntity());
        if (pawn)
            pawn->setAimPosition(WorldEntity::FRONT);
    
        return true;

    }
    void CommonController::doFire()
    {
        this->getControllableEntity()->fire(0);
    }
   

}