Method updateThreads

Engine/source/gui/editor/guiShapeEdPreview.cpp:1329–1394

}

void GuiShapeEdPreview::updateThreads(F32 delta)
{
   // Advance time on all threads
   for ( S32 i = 0; i < mThreads.size(); i++ )
   {
      Thread& thread = mThreads[i];
      if ( !thread.key || !thread.direction )
         continue;

      // Make sure thread priority matches sequence priority (which may have changed)
      mModel->setPriority( thread.key, mModel->getShape()->sequences[mModel->getSequence( thread.key )].priority );

      // Handle ping-pong
      if ( thread.pingpong && !mModel->isInTransition( thread.key ) )
      {
         // Determine next position, then adjust if needed
         F32 threadPos = mModel->getPos( thread.key );
         F32 nextPos = threadPos + ( mModel->getTimeScale( thread.key ) * delta / mModel->getDuration( thread.key ) );

         if ( nextPos < 0 )
         {
            // Reflect position and swap playback direction
            nextPos = -nextPos;
            mModel->setTimeScale( thread.key, -mModel->getTimeScale( thread.key ) );
            mModel->setPos( thread.key, nextPos );
         }
         else if ( nextPos > 1.0f )
         {
            // Reflect position and swap playback direction
            nextPos = 2.0f - nextPos;
            mModel->setTimeScale( thread.key, -mModel->getTimeScale( thread.key ) );
            mModel->setPos( thread.key, nextPos );
         }
         else
         {
            // Advance time normally
            mModel->advanceTime( delta, thread.key );
         }
      }
      else
      {
         // Advance time normally
         mModel->advanceTime( delta, thread.key );
      }

      // Invoke script callback if active thread position has changed
      if ( i == mActiveThread )
      {
         F32 threadPos = mModel->getPos( thread.key );
         bool inTransition = mModel->isInTransition( thread.key );
         onThreadPosChanged_callback( threadPos, inTransition );
      }
   }

   // Mark threads as dirty so they will be re-sorted, in case the user changed
   // sequence priority or blend flags
   mModel->setDirty( TSShapeInstance::ThreadDirty );