hovervehicle.cc

五行MMORPG引擎系统V1.0

         alxStop(mJetSound);
         mJetSound = NULL_AUDIOHANDLE;
      }
   }

   // Update engine sound...
   if (mEngineSound == NULL_AUDIOHANDLE && mDataBlock->sound[HoverVehicleData::EngineSound] != NULL)
      mEngineSound = alxPlay(mDataBlock->sound[HoverVehicleData::EngineSound], &getTransform());
   if (mEngineSound != NULL_AUDIOHANDLE) {
      alxSourceMatrixF(mEngineSound, &getTransform());

      F32 denom  = mDataBlock->mainThrustForce + mDataBlock->strafeThrustForce;
      F32 factor = getMin(mThrustLevel, denom) / denom;
      F32 vol = 0.25 + factor * 0.75;
      alxSourcef(mEngineSound, AL_GAIN_LINEAR, vol);
   }

   // Are we floating?  If so, start the floating sound...
   if (mFloating) {
      if (mFloatSound == NULL_AUDIOHANDLE && mDataBlock->sound[HoverVehicleData::FloatSound] != NULL)
         mFloatSound = alxPlay(mDataBlock->sound[HoverVehicleData::FloatSound], &getTransform());

      if (mFloatSound != NULL_AUDIOHANDLE)
         alxSourceMatrixF(mFloatSound, &getTransform());
   } else {
      if (mFloatSound != NULL_AUDIOHANDLE) {
         alxStop(mFloatSound);
         mFloatSound = NULL_AUDIOHANDLE;
      }
   }
   updateJet(dt);
   updateDustTrail( dt );
}


//--------------------------------------------------------------------------

U32 HoverVehicle::packUpdate(NetConnection* con, U32 mask, BitStream* stream)
{
   U32 retMask = Parent::packUpdate(con, mask, stream);

   //
   stream->writeInt(mThrustDirection,NumThrustBits);

   return retMask;
}

void HoverVehicle::unpackUpdate(NetConnection* con, BitStream* stream)
{
   Parent::unpackUpdate(con, stream);

   mThrustDirection = ThrustDirection(stream->readInt(NumThrustBits));
   //
}


//--------------------------------------------------------------------------
void HoverVehicle::updateMove(const Move* move)
{
   Parent::updateMove(move);

   mForwardThrust = mThrottle > 0.0f ?  mThrottle : 0.0f;
   mReverseThrust = mThrottle < 0.0f ? -mThrottle : 0.0f;
   mLeftThrust    = move->x   < 0.0f ? -move->x   : 0.0f;
   mRightThrust   = move->x   > 0.0f ?  move->x   : 0.0f;

   mThrustDirection = (!move->y)? ThrustDown: (move->y > 0)? ThrustForward: ThrustBackward;
}

F32 HoverVehicle::getBaseStabilizerLength() const
{
   F32 base = mDataBlock->stabLenMin;
   F32 lengthDiff = mDataBlock->stabLenMax - mDataBlock->stabLenMin;
   F32 velLength  = mRigid.linVelocity.len();
   F32 minVel     = getMin(velLength, mDataBlock->maxThrustSpeed);
   F32 velDiff    = mDataBlock->maxThrustSpeed - minVel;
   F32 velRatio   = velDiff / mDataBlock->maxThrustSpeed;
   F32 inc        = lengthDiff * ( 1.0 - velRatio );
   base += inc;

   return base;
}


struct StabPoint
{
   Point3F osPoint;           //
   Point3F wsPoint;           //
   F32     extension;
   Point3F wsExtension;       //
   Point3F wsVelocity;        //
};


void HoverVehicle::updateForces(F32 /*dt*/)
{
   Point3F gravForce(0, 0, sHoverVehicleGravity * mRigid.mass * mGravityMod);

   MatrixF currTransform;
   mRigid.getTransform(&currTransform);
   mRigid.atRest = false;

   mThrustLevel = (mForwardThrust * mDataBlock->mainThrustForce    +
                   mReverseThrust * mDataBlock->reverseThrustForce +
                   mLeftThrust    * mDataBlock->strafeThrustForce  +
                   mRightThrust   * mDataBlock->strafeThrustForce);

   Point3F thrustForce = ((Point3F( 0,  1, 0) * (mForwardThrust * mDataBlock->mainThrustForce))    +
                          (Point3F( 0, -1, 0) * (mReverseThrust * mDataBlock->reverseThrustForce)) +
                          (Point3F(-1,  0, 0) * (mLeftThrust    * mDataBlock->strafeThrustForce))  +
                          (Point3F( 1,  0, 0) * (mRightThrust   * mDataBlock->strafeThrustForce)));
   currTransform.mulV(thrustForce);
   if (mJetting)
      thrustForce *= mDataBlock->turboFactor;

   Point3F torque(0, 0, 0);
   Point3F force(0, 0, 0);

   Point3F vel = mRigid.linVelocity;
   F32 baseStabLen = getBaseStabilizerLength();
   Point3F stabExtend(0, 0, -baseStabLen);
   currTransform.mulV(stabExtend);

   StabPoint stabPoints[2];
   stabPoints[0].osPoint = Point3F((mObjBox.min.x + mObjBox.max.x) * 0.5,
                                   mObjBox.max.y,
                                   (mObjBox.min.z + mObjBox.max.z) * 0.5);
   stabPoints[1].osPoint = Point3F((mObjBox.min.x + mObjBox.max.x) * 0.5,
                                   mObjBox.min.y,
                                   (mObjBox.min.z + mObjBox.max.z) * 0.5);
   U32 j, i;
   for (i = 0; i < 2; i++) {
      currTransform.mulP(stabPoints[i].osPoint, &stabPoints[i].wsPoint);
      stabPoints[i].wsExtension = stabExtend;
      stabPoints[i].extension   = baseStabLen;
      stabPoints[i].wsVelocity  = mRigid.linVelocity;
   }

   RayInfo rinfo;

   mFloating = true;
   bool reallyFloating = true;
   F32 compression[2] = { 0.0f, 0.0f };
   F32  normalMod[2]  = { 0.0f, 0.0f };
   bool normalSet[2]  = { false, false };
   Point3F normal[2];

   for (j = 0; j < 2; j++) {
      if (getContainer()->castRay(stabPoints[j].wsPoint, stabPoints[j].wsPoint + stabPoints[j].wsExtension * 2.0,
                                  TerrainObjectType | InteriorObjectType | WaterObjectType, &rinfo)) {
         reallyFloating = false;

         if (rinfo.t <= 0.5) {
            // Ok, stab is in contact with the ground, let's calc the forces...
            compression[j] = (1.0 - (rinfo.t * 2.0)) * baseStabLen;
         }
         normalSet[j] = true;
         normalMod[j] = rinfo.t < 0.5 ? 1.0 : (1.0 - ((rinfo.t - 0.5) * 2.0));

         normal[j] = rinfo.normal;
      }

      // Check the waterblock directly
      SimpleQueryList sql;
      mSceneManager->getWaterObjectList(sql);
      for (U32 i = 0; i < sql.mList.size(); i++)
      {
         WaterBlock* pBlock = static_cast<WaterBlock*>(sql.mList[i]);
         if (pBlock->isPointSubmerged(stabPoints[j].wsPoint))
         {
            compression[j] = baseStabLen;
            break;
         }
      }
   }

   for (j = 0; j < 2; j++) {
      if (compression[j] != 0.0) {
         mFloating = false;

         // Spring force and damping
         Point3F springForce = -stabPoints[j].wsExtension;
         springForce.normalize();
         springForce *= compression[j] * mDataBlock->stabSpringConstant;

         Point3F springDamping = -stabPoints[j].wsExtension;
         springDamping.normalize();
         springDamping *= -getMin(mDot(springDamping, stabPoints[j].wsVelocity), 0.7f) * mDataBlock->stabDampingConstant;

         force += springForce + springDamping;
      }
   }

   // Gravity
   if (reallyFloating == false)
      force += gravForce;
   else
      force += gravForce * mDataBlock->floatingGravMag;

   // Braking
   F32 vellen = mRigid.linVelocity.len();
   if (mThrottle == 0.0f &&
       mLeftThrust == 0.0f &&
       mRightThrust == 0.0f &&
       vellen != 0.0f &&
       vellen < mDataBlock->brakingActivationSpeed)
   {
      Point3F dir = mRigid.linVelocity;
      dir.normalize();
      dir.neg();
      force += dir *  mDataBlock->brakingForce;
   }

   // Gyro Drag
   torque = -mRigid.angMomentum * mDataBlock->gyroDrag;

   // Move to proper normal
   Point3F sn, r;
   currTransform.getColumn(2, &sn);
   if (normalSet[0] || normalSet[1]) {
      if (normalSet[0] && normalSet[1]) {
         F32 dot = mDot(normal[0], normal[1]);
         if (dot > 0.999) {
            // Just pick the first normal.  They're too close to call
            if ((sn - normal[0]).lenSquared() > 0.00001) {
               mCross(sn, normal[0], &r);
               torque += r * mDataBlock->normalForce * normalMod[0];
            }
         } else {
            Point3F rotAxis;
            mCross(normal[0], normal[1], &rotAxis);
            rotAxis.normalize();

            F32 angle = mAcos(dot) * (normalMod[0] / (normalMod[0] + normalMod[1]));
            AngAxisF aa(rotAxis, angle);
            QuatF q(aa);
            MatrixF tempMat(true);
            q.setMatrix(&tempMat);
            Point3F newNormal;
            tempMat.mulV(normal[1], &newNormal);

            if ((sn - newNormal).lenSquared() > 0.00001) {
               mCross(sn, newNormal, &r);
               torque += r * (mDataBlock->normalForce * ((normalMod[0] + normalMod[1]) * 0.5));
            }
         }
      } else {
         Point3F useNormal;
         F32     useMod;
         if (normalSet[0]) {
            useNormal = normal[0];
            useMod    = normalMod[0];
         } else {
            useNormal = normal[1];
            useMod    = normalMod[1];
         }

         if ((sn - useNormal).lenSquared() > 0.00001) {
            mCross(sn, useNormal, &r);
            torque += r * mDataBlock->normalForce * useMod;
         }
      }
   } else {
      if ((sn - Point3F(0, 0, 1)).lenSquared() > 0.00001) {
         mCross(sn, Point3F(0, 0, 1), &r);
         torque += r * mDataBlock->restorativeForce;
      }
   }

   Point3F sn2;
   currTransform.getColumn(0, &sn);
   currTransform.getColumn(1, &sn2);
   mCross(sn, sn2, &r);
   r.normalize();
   torque -= r * (mSteering.x * mDataBlock->steeringForce);

   currTransform.getColumn(0, &sn);
   currTransform.getColumn(2, &sn2);
   mCross(sn, sn2, &r);
   r.normalize();
   torque -= r * (mSteering.x * mDataBlock->rollForce);

   currTransform.getColumn(1, &sn);
   currTransform.getColumn(2, &sn2);
   mCross(sn, sn2, &r);
   r.normalize();
   torque -= r * (mSteering.y * mDataBlock->pitchForce);

   // Apply drag
   Point3F vDrag = mRigid.linVelocity;
   if (!mFloating) {
      vDrag.convolve(Point3F(1, 1, mDataBlock->vertFactor));
   } else {
      vDrag.convolve(Point3F(0.25, 0.25, mDataBlock->vertFactor));
   }
   force -= vDrag * mDataBlock->dragForce;

   force += mFloating ? thrustForce * mDataBlock->floatingThrustFactor : thrustForce;

   // Add in physical zone force
   force += mAppliedForce;

   // Container buoyancy & drag
   force  += Point3F(0, 0,-mBuoyancy * sHoverVehicleGravity * mRigid.mass * mGravityMod);
   force  -= mRigid.linVelocity * mDrag;
   torque -= mRigid.angMomentum * mDrag;

   mRigid.force  = force;
   mRigid.torque = torque;
}


//--------------------------------------------------------------------------
U32 HoverVehicle::getCollisionMask()
{
   if (isServerObject())
      return sServerCollisionMask;
   else
      return sClientCollisionMask;
}

void HoverVehicle::updateDustTrail( F32 dt )
{
   if( !mDustTrailEmitter ) return;

   // check if close to ground
   Point3F startPos = getPosition();
   Point3F endPos = startPos + Point3F( 0.0, 0.0, -mDataBlock->triggerTrailHeight );

   RayInfo rayInfo;
   if( !getContainer()->castRay( startPos, endPos, TerrainObjectType, &rayInfo ) )
   {
      return;
   }

   VectorF vel = getVelocity();

   TerrainBlock* tBlock = static_cast<TerrainBlock*>(rayInfo.object);
   S32 mapIndex = tBlock->mMPMIndex[0];
   MaterialPropertyMap* pMatMap = static_cast<MaterialPropertyMap*>(Sim::findObject("MaterialPropertyMap"));
   const MaterialPropertyMap::MapEntry* pEntry = pMatMap->getMapEntryFromIndex(mapIndex);

   // emit dust if moving
   if( vel.len() > 2.0  && pEntry)
   {
      VectorF axis = vel;
      axis.normalize();

      S32 x;
      ColorF colorList[ParticleEngine::PC_COLOR_KEYS];

      for(x = 0; x < 2; ++x)
         colorList[x].set( pEntry->puffColor[x].red, pEntry->puffColor[x].green, pEntry->puffColor[x].blue, pEntry->puffColor[x].alpha );
      for(x = 2; x < ParticleEngine::PC_COLOR_KEYS; ++x)
         colorList[x].set( 1.0, 1.0, 1.0, 0.0 );

      mDustTrailEmitter->setColors( colorList );

      Point3F contactPoint = rayInfo.point + mDataBlock->dustTrailOffset;
      mDustTrailEmitter->emitParticles( contactPoint , true, axis, vel, (U32)(dt * 1000 * (vel.len() / mDataBlock->dustTrailFreqMod)));
   }

}

void HoverVehicle::updateJet(F32 dt)
{
   if (mJetThread[BackActivate] == NULL)
      return;

   F32 pos = mShapeInstance->getPos(mJetThread[BackActivate]);
   F32 scale = mShapeInstance->getTimeScale(mJetThread[BackActivate]);

   // Thrust Animation threads
   //  Back
   if (mJetSeq[BackActivate] >=0 ) {
      if (!mBackMaintainOn || mThrustDirection != ThrustForward) {
         if (mBackMaintainOn) {
            mShapeInstance->setPos(mJetThread[BackActivate], 1);
            mShapeInstance->destroyThread(mJetThread[BackMaintain]);
            mBackMaintainOn = false;
         }
         mShapeInstance->setTimeScale(mJetThread[BackActivate],
                                      (mThrustDirection == ThrustForward)? 1: -1);
         mShapeInstance->advanceTime(dt,mJetThread[BackActivate]);
      }
   }

   if (mJetSeq[BackMaintain] >= 0 && !mBackMaintainOn &&
       mShapeInstance->getPos(mJetThread[BackActivate]) >= 1.0)
   {
      mShapeInstance->setPos(mJetThread[BackActivate], 0);
      mShapeInstance->setTimeScale(mJetThread[BackActivate], 0);
      mJetThread[BackMaintain] = mShapeInstance->addThread();
      mShapeInstance->setSequence(mJetThread[BackMaintain],mJetSeq[BackMaintain],0);
      mShapeInstance->setTimeScale(mJetThread[BackMaintain],1);
      mBackMaintainOn = true;
   }

   if(mBackMaintainOn)
      mShapeInstance->advanceTime(dt,mJetThread[BackMaintain]);

   // Jet particles
   for (S32 j = 0; j < NumThrustDirections; j++) {
      JetActivation& jet = sJetActivation[j];
      updateEmitter(mJetting && j == mThrustDirection,dt,mDataBlock->jetEmitter[jet.emitter],
                    jet.node,HoverVehicleData::MaxDirectionJets);
   }
}

void HoverVehicle::updateEmitter(bool active,F32 dt,ParticleEmitterData *emitter,S32 idx,S32 count)
{
   if (!emitter)
      return;
   for (S32 j = idx; j < idx + count; j++)
      if (active) {
         if (mDataBlock->jetNode[j] != -1) {
            if (!bool(mJetEmitter[j])) {
               mJetEmitter[j] = new ParticleEmitter;
               mJetEmitter[j]->onNewDataBlock(emitter);
               mJetEmitter[j]->registerObject();
            }
            MatrixF mat;
            Point3F pos,axis;
            mat.mul(getRenderTransform(),
                    mShapeInstance->mNodeTransforms[mDataBlock->jetNode[j]]);
            mat.getColumn(1,&axis);
            mat.getColumn(3,&pos);
            mJetEmitter[j]->emitParticles(pos,true,axis,getVelocity(),(U32)(dt * 1000));
         }
      }
      else {
         for (S32 j = idx; j < idx + count; j++)
            if (bool(mJetEmitter[j])) {
               mJetEmitter[j]->deleteWhenEmpty();
               mJetEmitter[j] = 0;
            }
      }
}