CPropMinigun::UpdateBarrelMovement

/* CPropMinigun::UpdateBarrelMovement(float) */

void __thiscall CPropMinigun::UpdateBarrelMovement(CPropMinigun *this,float param_1)

{
  float fVar1;
  longdouble lVar2;
  float fVar3;
  float fVar4;
  float fVar5;
  
  if (this[0x15dc] == (CPropMinigun)0x0) {
    fVar4 = 0.0;
    fVar3 = *(float *)(this + 0x1610);
    fVar1 = *(float *)(MinigunSpinDownSpeed._28_4_ + 0x2c);
    *(undefined4 *)(this + 0x1614) = 0;
    fVar5 = fVar3;
    if (fVar3 == 0.0) goto LAB_0054bd38;
  }
  else {
    fVar3 = *(float *)(this + 0x1610);
    fVar1 = *(float *)(MinigunSpinUpSpeed._28_4_ + 0x2c);
    fVar4 = *(float *)(MinigunFiringSpeed._28_4_ + 0x2c);
    *(float *)(this + 0x1614) = fVar4;
    fVar5 = fVar3;
    if (fVar3 == fVar4) goto LAB_0054bd38;
  }
  lVar2 = (longdouble)Approach(fVar4,fVar5,fVar1 * param_1);
  fVar3 = (float)lVar2;
  *(float *)(this + 0x1610) = fVar3;
  if (fVar5 != fVar3) {
    if ((fVar3 != *(float *)(this + 0x1614)) || (fVar3 <= 0.0)) {
      if ((fVar5 == *(float *)(MinigunFiringSpeed._28_4_ + 0x2c)) &&
         (*(float *)(this + 0x1614) == 0.0)) {
        OnFireStop(this);
        fVar3 = *(float *)(this + 0x1610);
      }
    }
    else {
      OnFireStart(this);
      fVar3 = *(float *)(this + 0x1610);
    }
  }
LAB_0054bd38:
  *(float *)(this + 0x1618) = fVar3 * param_1 + *(float *)(this + 0x1618);
  return;
}