netAspect.cpp

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/*
 * netAspect.cpp
 *
 */

#include <netAspect.h>
#include <ent.h>
#include <engine.h>

void FastEcslent::NetAspect::init(){
        SPEED_TOLERANCE = 0.1;
        HEADING_TOLERANCE = 3.14159/360.0;

        firstTick = true;
};

void FastEcslent::NetAspect::initNetworking(){
        int size = updateQueue.size();
        if(size > 0){
                statusData = *(updateQueue.back()); //get the latest throw out the rest
                this->clearQueue(&updateQueue, size);

                remotePos = Ogre::Vector3(statusData.px,statusData.py,statusData.pz);
                entity->pos = remotePos;

                entity->yaw = statusData.yaw;
                remoteVel = Ogre::Vector3(statusData.vx, statusData.vy, statusData.vz);
                entity->speed = remoteVel.length();
                entity->desiredSpeed = statusData.ds;
                entity->desiredHeading = statusData.dh;
        }

        oldTime = 0;
    latency = 0;
    nSteps = 0;

    ds = 0;
    dh = 0;

    rotFactor     = 0;
    rotProgress   = 1.0;
}



void FastEcslent::NetAspect::tick(double dt){
        if(firstTick){
                initNetworking();
                firstTick = false;
        }

        if(entity->ai->state == NETSLAVE){
                updateEcslent(dt);
        }else if(entity->ai->state == MANUAL && !entity->engine->options.isServer){
                updateServer(entity->desiredSpeed, entity->desiredHeading);
        }
};

void FastEcslent::NetAspect::updateEcslent(double dt){
        int size = updateQueue.size();
        if(size > 0){
                statusData = *(updateQueue.back()); //get the latest throw out the rest
                this->clearQueue(&updateQueue, size);

                nSteps = 0;

                if(statusData.flag > oldTime){
                        latency = (statusData.flag - oldTime)/1000.0;
                        oldTime = statusData.flag;
                        nSteps = latency/dt;

                        lerpPos();
                        lerpRot();
                        entity->desiredSpeed = statusData.ds;
                        entity->desiredHeading = statusData.dh;
                }else{
                        rotProgress = 0;
                        nSteps = 0;
                }

                if (nSteps > 0){
                        entity->pos -= diffPosFrac;
                        if(rotProgress< 1.0){
                                qDelta = Ogre::Quaternion::Slerp(rotProgress, srcOrie, destOrie,true);
                                deltaYaw = qDelta.getYaw().valueRadians();
                                entity->yaw = deltaYaw;
                                rotProgress += rotFactor;
                        }
                        nSteps -= 1;
                }
        }
}

void FastEcslent::NetAspect::lerpPos(){
        remotePos = Ogre::Vector3(statusData.px, statusData.py, statusData.pz);
        remoteVel = Ogre::Vector3(statusData.vx, statusData.vy, statusData.vz);
        nextRemotePos = remotePos + (remoteVel * latency);
        nextPos = entity->pos + (entity->vel * latency);
        diffPos = nextPos - nextRemotePos;
        diffPosFrac = diffPos/nSteps;
}

void FastEcslent::NetAspect::lerpRot(){
        remoteQuat = pitchYawRoll(0.0f, toDegrees(statusData.yaw), 0.0f);
        destOrie = remoteQuat * pitchYawRoll(0.0f, toDegrees(statusData.rSpeed * latency), 0.0f);
        srcOrie = pitchYawRoll(0.0, toDegrees(entity->yaw), 0.0f);
        finalDestOrie = destOrie * srcOrie;
        if(destOrie.equals(srcOrie, Ogre::Radian(HEADING_TOLERANCE))){
                rotFactor = 1.0;
                rotProgress = 1.0;
        }else{
                rotProgress = 1.0/nSteps;
                rotProgress = rotFactor;
        }
}

bool FastEcslent::NetAspect::withinSpeedTolerance(float a, float b){
        return std::abs(a - b) < SPEED_TOLERANCE;
}

bool FastEcslent::NetAspect::withinHeadingTolerance(float a, float b){
        return std::abs(a - b) < HEADING_TOLERANCE;
}

void FastEcslent::NetAspect::updateServer(float newDS, float newDH){
        if(withinSpeedTolerance(ds,newDS) and withinHeadingTolerance(dh, newDH)){
                return;
        }else{
                ds = newDS;
                dh = newDH;
                if(dh >= -pi and dh <= pi and ds <= entity->maxSpeed and ds >=0){
                        CommandEntity* cmd = new CommandEntity();
                        cmd->id = entity->engine->net->getNetId(entity);
                        cmd->ds = ds;
                        cmd->dh = dh;
                        SquelchEntity* squelch = new SquelchEntity();
                        squelch->id = cmd->id;
                        entity->engine->net->addCommand(cmd);
                        entity->engine->net->addSquelch(squelch);
                }
        }
}

bool FastEcslent::NetAspect::isValid(State *s){
        if(s->id == 0 && s->dh == 0 && s->ds == 0
                        && s->px == 0 && s->py == 0 && s->pz == 0
                        && s->vx == 0 && s->vy == 0 && s->vz==0)
                return false;
        else
                return true;
}

void FastEcslent::NetAspect::squalch(){
        if(entity->ai){
                entity->ai->state = NETSLAVE;
        }
}

void FastEcslent::NetAspect::squalchOtherClients(){
        if(entity->ai){
                entity->ai->state = NETSLAVE;
        }
}

void FastEcslent::NetAspect::clearQueue(std::deque<State*> * queue, int size){
        for(int i=0; i< size; i++){
                State * s = queue->front();
                queue->pop_front();
                delete s;
        }
}

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