Method getGround

Engine/source/ts/tsThread.cpp:115–160

}

void TSThread::getGround(F32 t, MatrixF * pMat)
{
   static const QuatF unitRotation(0,0,0,1);
   static const Point3F unitTranslation = Point3F::Zero;

   const QuatF * q1, * q2;
   QuatF rot1,rot2;
   const Point3F * p1, * p2;

   // if N = sequence->numGroundFrames, then there are N+1 positions we
   // interpolate betweeen:  0/N, 1/N ... N/N
   // we need to convert the p passed to us into 2 ground keyframes:

   // the 0.99999f is in case 'p' is exactly 1.0f, which is legal but 'kf'
   // needs to be strictly less than 'sequence->numGroundFrames'
   F32 kf = 0.999999f * t * (F32) getSequence()->numGroundFrames;

   // get frame number and interp param (kpos)
   S32 frame = (S32)kf;
   F32 kpos = kf - (F32)frame;

   // now point pT1 and pT2 at transforms for keyframes 'frame' and 'frame+1'

   // following a little strange:  first ground keyframe (0/N in comment above) is
   // assumed to be ident. and not found in the list.
   if (frame)
   {
      p1 = &mShapeInstance->mShape->groundTranslations[getSequence()->firstGroundFrame + frame - 1];
      q1 = &mShapeInstance->mShape->groundRotations[getSequence()->firstGroundFrame + frame - 1].getQuatF(&rot1);
   }
   else
   {
      p1 = &unitTranslation;
      q1 = &unitRotation;
   }

   // similar to above, ground keyframe number 'frame+1' is actually offset by 'frame'
   p2 = &mShapeInstance->mShape->groundTranslations[getSequence()->firstGroundFrame + frame];
   q2 = &mShapeInstance->mShape->groundRotations[getSequence()->firstGroundFrame + frame].getQuatF(&rot2);

   QuatF q;
   Point3F p;
   TSTransform::interpolate(*q1,*q2,kpos,&q);
   TSTransform::interpolate(*p1,*p2,kpos,&p);
   TSTransform::setMatrix(q,p,pMat);
}

void TSThread::setSequence(S32 seq, F32 toPos)
{