C++ World::isFlying方法代码示例

bool MWMechanics::AiPackage::shortcutPath(const ESM::Pathgrid::Point& startPoint, const ESM::Pathgrid::Point& endPoint, const MWWorld::Ptr& actor, bool *destInLOS)
{
    const MWWorld::Class& actorClass = actor.getClass();
    MWBase::World* world = MWBase::Environment::get().getWorld();

    // check if actor can move along z-axis
    bool actorCanMoveByZ = (actorClass.canSwim(actor) && MWBase::Environment::get().getWorld()->isSwimming(actor))
        || world->isFlying(actor);

    // don't use pathgrid when actor can move in 3 dimensions
    bool isPathClear = actorCanMoveByZ;

    if (!isPathClear
        && (!mShortcutProhibited || (PathFinder::MakeOsgVec3(mShortcutFailPos) - PathFinder::MakeOsgVec3(startPoint)).length() >= PATHFIND_SHORTCUT_RETRY_DIST))
    {
        // check if target is clearly visible
        isPathClear = !MWBase::Environment::get().getWorld()->castRay(
            static_cast<float>(startPoint.mX), static_cast<float>(startPoint.mY), static_cast<float>(startPoint.mZ),
            static_cast<float>(endPoint.mX), static_cast<float>(endPoint.mY), static_cast<float>(endPoint.mZ));

        if (destInLOS != NULL) *destInLOS = isPathClear;

        if (!isPathClear)
            return false;

        // check if an actor can move along the shortcut path
        isPathClear = checkWayIsClearForActor(startPoint, endPoint, actor);
    }

    if (isPathClear) // can shortcut the path
    {
        mPathFinder.clearPath();
        mPathFinder.addPointToPath(endPoint);
        return true;
    }

    return false;
}

//.........这里部分代码省略.........
         *    weapons)
         *  - Distance a little further away than the actor's weapon reach
         *    i.e. rangeFollow > rangeAttack for melee weapons
         *  - Hardcoded value (0 for ranged weapons)
         *  - Once the target gets beyond this distance mFollowTarget is cleared
         *    and a path to the target needs to be found
         *
         * mFollowTarget:
         *
         *  - Once triggered, the actor follows the target with LOS shortcut
         *    (the shortcut really only applies to cells where pathgrids are
         *    available, since the default path without pathgrids is direct to
         *    target even if LOS is not achieved)
         */

        ESM::Position pos = actor.getRefData().getPosition();
        Ogre::Vector3 vActorPos(pos.pos);
        Ogre::Vector3 vTargetPos(target.getRefData().getPosition().pos);
        Ogre::Vector3 vDirToTarget = vTargetPos - vActorPos;
        float distToTarget = vDirToTarget.length();
        
        Ogre::Vector3& lastActorPos = storage.mLastActorPos;
        bool& followTarget = storage.mFollowTarget;

        bool isStuck = false;
        float speed = 0.0f;
        if(movement.mPosition[1] && (lastActorPos - vActorPos).length() < (speed = actorClass.getSpeed(actor)) * tReaction / 2)
            isStuck = true;

        lastActorPos = vActorPos;

        // check if actor can move along z-axis
        bool canMoveByZ = (actorClass.canSwim(actor) && world->isSwimming(actor))
            || world->isFlying(actor);

        // for distant combat we should know if target is in LOS even if distToTarget < rangeAttack 
        bool inLOS = distantCombat ? world->getLOS(actor, target) : true;

        // can't fight if attacker can't go where target is.  E.g. A fish can't attack person on land.
        if (distToTarget >= rangeAttack
                && !actorClass.isNpc() && !MWMechanics::isEnvironmentCompatible(actor, target))
        {
            // TODO: start fleeing?
            movement.mPosition[0] = 0;
            movement.mPosition[1] = 0;
            movement.mPosition[2] = 0;
            readyToAttack = false;
            actorClass.getCreatureStats(actor).setAttackingOrSpell(false);
            return false;
        }

        // (within attack dist) || (not quite attack dist while following)
        if(inLOS && (distToTarget < rangeAttack || (distToTarget <= rangeFollow && followTarget && !isStuck)))
        {
            //Melee and Close-up combat
            
            // getXAngleToDir determines vertical angle to target:
            // if actor can move along z-axis it will control movement dir
            // if can't - it will control correct aiming.
            // note: in getZAngleToDir if we preserve dir.z then horizontal angle can be inaccurate
            if (distantCombat)
            {
                Ogre::Vector3& lastTargetPos = storage.mLastTargetPos;
                Ogre::Vector3 vAimDir = AimDirToMovingTarget(actor, target, lastTargetPos, tReaction, weaptype, strength);
                lastTargetPos = vTargetPos;
                movement.mRotation[0] = getXAngleToDir(vAimDir);

//.........这里部分代码省略.........
         *  - Distance a little further away than the actor's weapon reach
         *    i.e. rangeFollow > rangeAttack for melee weapons
         *  - Hardcoded value (0 for ranged weapons)
         *  - Once the target gets beyond this distance mFollowTarget is cleared
         *    and a path to the target needs to be found
         *
         * mFollowTarget:
         *
         *  - Once triggered, the actor follows the target with LOS shortcut
         *    (the shortcut really only applies to cells where pathgrids are
         *    available, since the default path without pathgrids is direct to
         *    target even if LOS is not achieved)
         */

        ESM::Position pos = actor.getRefData().getPosition();
        osg::Vec3f vActorPos(pos.asVec3());
        osg::Vec3f vTargetPos(target.getRefData().getPosition().asVec3());

        osg::Vec3f vAimDir = MWBase::Environment::get().getWorld()->aimToTarget(actor, target);
        float distToTarget = MWBase::Environment::get().getWorld()->getHitDistance(actor, target);
        
        osg::Vec3f& lastActorPos = storage.mLastActorPos;
        bool& followTarget = storage.mFollowTarget;

        bool isStuck = false;
        float speed = 0.0f;
        if(movement.mPosition[1] && (lastActorPos - vActorPos).length() < (speed = actorClass.getSpeed(actor)) * REACTION_INTERVAL / 2)
            isStuck = true;

        lastActorPos = vActorPos;

        // check if actor can move along z-axis
        bool canMoveByZ = (actorClass.canSwim(actor) && world->isSwimming(actor))
            || world->isFlying(actor);

        // can't fight if attacker can't go where target is.  E.g. A fish can't attack person on land.
        if (distToTarget >= rangeAttack
                && !actorClass.isNpc() && !MWMechanics::isEnvironmentCompatible(actor, target))
        {
            // TODO: start fleeing?
            storage.stopAttack();
            return false;
        }

        // for distant combat we should know if target is in LOS even if distToTarget < rangeAttack 
        bool inLOS = distantCombat ? world->getLOS(actor, target) : true;

        // (within attack dist) || (not quite attack dist while following)
        if(inLOS && (distToTarget < rangeAttack || (distToTarget <= rangeFollow && followTarget && !isStuck)))
        {
            mPathFinder.clearPath();
            //Melee and Close-up combat
            
            // getXAngleToDir determines vertical angle to target:
            // if actor can move along z-axis it will control movement dir
            // if can't - it will control correct aiming.
            // note: in getZAngleToDir if we preserve dir.z then horizontal angle can be inaccurate
            if (distantCombat)
            {
                osg::Vec3f& lastTargetPos = storage.mLastTargetPos;
                vAimDir = AimDirToMovingTarget(actor, target, lastTargetPos, REACTION_INTERVAL, weaptype,
                    storage.mStrength);
                lastTargetPos = vTargetPos;
                movement.mRotation[0] = getXAngleToDir(vAimDir);
                movement.mRotation[2] = getZAngleToDir(vAimDir);
            }