/* Rotates and moves a polygon-based object around the three axes.
   Movement is implemented only along the Z axis currently. */
#include "polygon.h"

void RotateAndMovePObject(PObject * ObjectToMove)
{
   if (--ObjectToMove->RDelayCount == 0) {   /* rotate */
      ObjectToMove->RDelayCount = ObjectToMove->RDelayCountBase;
      if (ObjectToMove->Rotate.RotateX != 0.0)
         AppendRotationX(ObjectToMove->XformToWorld,
               ObjectToMove->Rotate.RotateX);
      if (ObjectToMove->Rotate.RotateY != 0.0)
         AppendRotationY(ObjectToMove->XformToWorld,
               ObjectToMove->Rotate.RotateY);
      if (ObjectToMove->Rotate.RotateZ != 0.0)
         AppendRotationZ(ObjectToMove->XformToWorld,
               ObjectToMove->Rotate.RotateZ);
      ObjectToMove->RecalcXform = 1;
   }
   /* Move in Z, checking for bouncing */
   if (--ObjectToMove->MDelayCount == 0) {
      ObjectToMove->MDelayCount = ObjectToMove->MDelayCountBase;
      ObjectToMove->XformToWorld[2][3] += ObjectToMove->Move.MoveZ;
      if ((ObjectToMove->XformToWorld[2][3] >
            ObjectToMove->Move.MaxZ) ||
            (ObjectToMove->XformToWorld[2][3] <
            ObjectToMove->Move.MinZ) ) {
         ObjectToMove->Move.MoveZ = -ObjectToMove->Move.MoveZ;
      }
      ObjectToMove->RecalcXform = 1;
   }
}