Merge pull request #1399 from Azaezel/alpha41/restingLagFace

rigidshape pef tweaks

Engine/source/T3D/rigid.cpp

@@ -363,4 +363,6 @@ void Rigid::setAtRest()
    linMomentum.set(0.0f,0.0f,0.0f);
    angVelocity.set(0.0f,0.0f,0.0f);
    angMomentum.set(0.0f,0.0f,0.0f);
+   force.set(0.0f, 0.0f, 0.0f);
+   torque.set(0.0f, 0.0f, 0.0f);
 }

Engine/source/T3D/rigidShape.cpp

@@ -1117,7 +1117,7 @@ void RigidShape::updatePos(F32 dt)
       if (mCollisionList.getCount())
       {
          F32 k = mRigid.getKineticEnergy();
-         F32 G = mNetGravity* dt;
+         F32 G = mNetGravity* dt * TickMs / mDataBlock->integration;
          F32 Kg = 0.5 * mRigid.mass * G * G;
          if (k < sRestTol * Kg && ++restCount > sRestCount)
             mRigid.setAtRest();
@@ -1494,10 +1494,12 @@ void RigidShape::writePacketData(GameConnection *connection, BitStream *stream)
    Parent::writePacketData(connection, stream);
 
    mathWrite(*stream, mRigid.linPosition);
-   mathWrite(*stream, mRigid.angPosition);
-   mathWrite(*stream, mRigid.linMomentum);
-   mathWrite(*stream, mRigid.angMomentum);
-   stream->writeFlag(mRigid.atRest);
+   if (!stream->writeFlag(mRigid.atRest))
+   {
+      mathWrite(*stream, mRigid.angPosition);
+      mathWrite(*stream, mRigid.linMomentum);
+      mathWrite(*stream, mRigid.angMomentum);
+   }
    stream->writeFlag(mContacts.getCount() == 0);
 
    stream->writeFlag(mDisableMove);
@@ -1509,14 +1511,20 @@ void RigidShape::readPacketData(GameConnection *connection, BitStream *stream)
    Parent::readPacketData(connection, stream);
 
    mathRead(*stream, &mRigid.linPosition);
-   mathRead(*stream, &mRigid.angPosition);
-   mathRead(*stream, &mRigid.linMomentum);
-   mathRead(*stream, &mRigid.angMomentum);
-   mRigid.atRest = stream->readFlag();
+   if (stream->readFlag())
+   {
+      mRigid.setAtRest();
+   }
+   else
+   {
+      mathRead(*stream, &mRigid.angPosition);
+      mathRead(*stream, &mRigid.linMomentum);
+      mathRead(*stream, &mRigid.angMomentum);
+      mRigid.updateInertialTensor();
+      mRigid.updateVelocity();
+   }
    if (stream->readFlag())
       mContacts.clear();
-   mRigid.updateInertialTensor();
-   mRigid.updateVelocity();
 
    mDisableMove = stream->readFlag();
    stream->setCompressionPoint(mRigid.linPosition);
@@ -1541,10 +1549,12 @@ U32 RigidShape::packUpdate(NetConnection *con, U32 mask, BitStream *stream)
       stream->writeFlag(mask & ForceMoveMask);
 
       stream->writeCompressedPoint(mRigid.linPosition);
-      mathWrite(*stream, mRigid.angPosition);
-      mathWrite(*stream, mRigid.linMomentum);
-      mathWrite(*stream, mRigid.angMomentum);
-      stream->writeFlag(mRigid.atRest);
+      if (!stream->writeFlag(mRigid.atRest))
+      {
+         mathWrite(*stream, mRigid.angPosition);
+         mathWrite(*stream, mRigid.linMomentum);
+         mathWrite(*stream, mRigid.angMomentum);
+      }
    }
    
    if(stream->writeFlag(mask & FreezeMask))
@@ -1574,11 +1584,18 @@ void RigidShape::unpackUpdate(NetConnection *con, BitStream *stream)
 
       // Read in new position and momentum values
       stream->readCompressedPoint(&mRigid.linPosition);
-      mathRead(*stream, &mRigid.angPosition);
-      mathRead(*stream, &mRigid.linMomentum);
-      mathRead(*stream, &mRigid.angMomentum);
-      mRigid.atRest = stream->readFlag();
-      mRigid.updateVelocity();
+
+      if (stream->readFlag())
+      {
+         mRigid.setAtRest();
+      }
+      else
+      {
+         mathRead(*stream, &mRigid.angPosition);
+         mathRead(*stream, &mRigid.linMomentum);
+         mathRead(*stream, &mRigid.angMomentum);
+         mRigid.updateVelocity();
+      }
 
       if (!forceUpdate && isProperlyAdded()) 
       {
@@ -1631,6 +1648,7 @@ void RigidShape::unpackUpdate(NetConnection *con, BitStream *stream)
          mDelta.warpCount = mDelta.warpTicks = 0;
          setPosition(mRigid.linPosition, mRigid.angPosition);
       }
+      mRigid.updateCenterOfMass();
    }
    
    if(stream->readFlag())

Engine/source/T3D/vehicles/vehicle.cpp

@@ -807,7 +807,7 @@ void Vehicle::updatePos(F32 dt)
       if (mCollisionList.getCount()) 
       {
          F32 k = mRigid.getKineticEnergy();
-         F32 G = mNetGravity* dt;
+         F32 G = mNetGravity* dt * TickMs / mDataBlock->integration;
          F32 Kg = 0.5 * mRigid.mass * G * G;
          if (k < sRestTol * Kg && ++restCount > sRestCount)
             mRigid.setAtRest();
@@ -959,16 +959,6 @@ U32 Vehicle::packUpdate(NetConnection *con, U32 mask, BitStream *stream)
    stream->writeFloat(pitch,9);
    mDelta.move.pack(stream);
 
-   if (stream->writeFlag(mask & PositionMask))
-   {
-      stream->writeCompressedPoint(mRigid.linPosition);
-      mathWrite(*stream, mRigid.angPosition);
-      mathWrite(*stream, mRigid.linMomentum);
-      mathWrite(*stream, mRigid.angMomentum);
-      stream->writeFlag(mRigid.atRest);
-   }
-
-   
    stream->writeFloat(mClampF(getEnergyValue(), 0.f, 1.f), 8);
 
    return retMask;
@@ -989,73 +979,6 @@ void Vehicle::unpackUpdate(NetConnection *con, BitStream *stream)
    mSteering.y = (2 * pitch * mDataBlock->maxSteeringAngle) - mDataBlock->maxSteeringAngle;
    mDelta.move.unpack(stream);
 
-   if (stream->readFlag()) 
-   {
-      mPredictionCount = sMaxPredictionTicks;
-      F32 speed = mRigid.linVelocity.len();
-      mDelta.warpRot[0] = mRigid.angPosition;
-
-      // Read in new position and momentum values
-      stream->readCompressedPoint(&mRigid.linPosition);
-      mathRead(*stream, &mRigid.angPosition);
-      mathRead(*stream, &mRigid.linMomentum);
-      mathRead(*stream, &mRigid.angMomentum);
-      mRigid.atRest = stream->readFlag();
-      mRigid.updateVelocity();
-
-      if (isProperlyAdded()) 
-      {
-         // Determine number of ticks to warp based on the average
-         // of the client and server velocities.
-         Point3F cp = mDelta.pos + mDelta.posVec * mDelta.dt;
-         mDelta.warpOffset = mRigid.linPosition - cp;
-
-         // Calc the distance covered in one tick as the average of
-         // the old speed and the new speed from the server.
-         F32 dt,as = (speed + mRigid.linVelocity.len()) * 0.5 * TickSec;
-
-         // Cal how many ticks it will take to cover the warp offset.
-         // If it's less than what's left in the current tick, we'll just
-         // warp in the remaining time.
-         if (!as || (dt = mDelta.warpOffset.len() / as) > sMaxWarpTicks)
-            dt = mDelta.dt + sMaxWarpTicks;
-         else
-            dt = (dt <= mDelta.dt)? mDelta.dt : mCeil(dt - mDelta.dt) + mDelta.dt;
-
-         // Adjust current frame interpolation
-         if (mDelta.dt) {
-            mDelta.pos = cp + (mDelta.warpOffset * (mDelta.dt / dt));
-            mDelta.posVec = (cp - mDelta.pos) / mDelta.dt;
-            QuatF cr;
-            cr.interpolate(mDelta.rot[1],mDelta.rot[0],mDelta.dt);
-            mDelta.rot[1].interpolate(cr,mRigid.angPosition,mDelta.dt / dt);
-            mDelta.rot[0].extrapolate(mDelta.rot[1],cr,mDelta.dt);
-         }
-
-         // Calculated multi-tick warp
-         mDelta.warpCount = 0;
-         mDelta.warpTicks = (S32)(mFloor(dt));
-         if (mDelta.warpTicks) 
-         {
-            mDelta.warpOffset = mRigid.linPosition - mDelta.pos;
-            mDelta.warpOffset /= (F32)mDelta.warpTicks;
-            mDelta.warpRot[0] = mDelta.rot[1];
-            mDelta.warpRot[1] = mRigid.angPosition;
-         }
-      }
-      else 
-      {
-         // Set the vehicle to the server position
-         mDelta.dt  = 0;
-         mDelta.pos = mRigid.linPosition;
-         mDelta.posVec.set(0,0,0);
-         mDelta.rot[1] = mDelta.rot[0] = mRigid.angPosition;
-         mDelta.warpCount = mDelta.warpTicks = 0;
-         setPosition(mRigid.linPosition, mRigid.angPosition);
-      }
-      mRigid.updateCenterOfMass();
-   }
-
    setEnergyLevel(stream->readFloat(8) * mDataBlock->maxEnergy);
 }
 

Engine/source/T3D/vehicles/wheeledVehicle.cpp

@@ -315,6 +315,7 @@ WheeledVehicleData::WheeledVehicleData()
    dMemset(&wheel, 0, sizeof(wheel));
    for (S32 i = 0; i < MaxSounds; i++)
       INIT_SOUNDASSET_ARRAY(WheeledVehicleSounds, i);
+   mDownForce = 0;
 }
 
 
@@ -477,6 +478,8 @@ void WheeledVehicleData::initPersistFields()
    addField("brakeTorque", TypeF32, Offset(brakeTorque, WheeledVehicleData),
       "@brief Torque applied when braking.\n\n"
       "This controls how fast the vehicle will stop when the brakes are applied." );
+   addField("downforce", TypeF32, Offset(mDownForce, WheeledVehicleData),
+      "downward force based on velocity.");
    endGroup("Steering");
 }
 
@@ -500,6 +503,7 @@ void WheeledVehicleData::packData(BitStream* stream)
    stream->write(engineTorque);
    stream->write(engineBrake);
    stream->write(brakeTorque);
+   stream->write(mDownForce);
 }
 
 void WheeledVehicleData::unpackData(BitStream* stream)
@@ -519,6 +523,7 @@ void WheeledVehicleData::unpackData(BitStream* stream)
    stream->read(&engineTorque);
    stream->read(&engineBrake);
    stream->read(&brakeTorque);
+   stream->read(&mDownForce);
 }
 
 
@@ -920,6 +925,18 @@ void WheeledVehicle::updateForces(F32 dt)
    Wheel* wend = &mWheel[mDataBlock->wheelCount];
    mRigid.clearForces();
 
+   //calculate here so we can stiffen the springs a bit based on
+   //the final amount of downforce
+   //get the speed
+   F32 downForce = mRigid.linVelocity.lenSquared() <= 1 ? 1 : mRigid.linVelocity.lenSquared();
+   //grab the datablock var
+   downForce *= mDataBlock->mDownForce;
+   //make it a smaller number so we can multiply gravity by it
+   downForce = mSqrt(downForce);
+   downForce *= TickSec;
+   //ensure that it is not smaller then one, cause mulltiplying gravity by fractions is baaaad
+   downForce = downForce < 1 ? 1 : downForce;
+
    // Calculate vertical load for friction.  Divide up the spring
    // forces across all the wheels that are in contact with
    // the ground.
@@ -955,6 +972,8 @@ void WheeledVehicle::updateForces(F32 dt)
          // Spring force & damping
          F32 spring  = wheel->spring->force * (1 - wheel->extension);
 
+         spring += (spring * downForce);
+
          if (wheel->extension == 0) //spring fully compressed
          {
             // Apply impulses to the rigid body to keep it from
@@ -1110,7 +1129,7 @@ void WheeledVehicle::updateForces(F32 dt)
    mRigid.force += mAppliedForce;
 
    // Container drag & buoyancy
-   mRigid.force  += Point3F(0, 0, mRigid.mass * mNetGravity);
+   mRigid.force  += Point3F(0, 0, mRigid.mass * mNetGravity * downForce);
    mRigid.force  -= mRigid.linVelocity * mDrag;
    mRigid.torque -= mRigid.angMomentum * mDrag;
 

Engine/source/T3D/vehicles/wheeledVehicle.h

@@ -141,6 +141,7 @@ struct WheeledVehicleData: public VehicleData
    ClippedPolyList rigidBody;    // Extracted from shape
    S32 brakeLightSequence;       // Brakes
    S32 steeringSequence;         // Steering animation
+   F32 mDownForce;
 
    //
    WheeledVehicleData();