virtual void do_simulation_controller(IVP_Event_Sim *event,IVP_U_Vector<IVP_Core> *core_list)
{
int i;
for( i = core_list->len()-1; i >=0; i--)
{
IVP_Core *pCore = core_list->element_at(i);
IVP_Real_Object *pivp = pCore->objects.element_at(0);
CPhysicsObject *pPhys = static_cast<CPhysicsObject *>(pivp->client_data);
float dragForce = -0.5 * pPhys->GetDragInDirection( pCore->speed ) * m_airDensity * event->delta_time;
if ( dragForce < -1.0f )
dragForce = -1.0f;
if ( dragForce < 0 )
{
IVP_U_Float_Point dragVelocity;
dragVelocity.set_multiple( &pCore->speed, dragForce );
pCore->speed.add( &dragVelocity );
}
float angDragForce = -pPhys->GetAngularDragInDirection( pCore->rot_speed ) * m_airDensity * event->delta_time;
if ( angDragForce < -1.0f )
angDragForce = -1.0f;
if ( angDragForce < 0 )
{
IVP_U_Float_Point angDragVelocity;
angDragVelocity.set_multiple( &pCore->rot_speed, angDragForce );
pCore->rot_speed.add( &angDragVelocity );
}
}
}
void CPhysicsDragController::Tick(btScalar dt)
{
for(int i = 0; i < m_ents.Size(); i++)
{
CPhysicsObject * object = (CPhysicsObject *)m_ents[i];
Vector dragLinearFinal(0,0,0);
AngularImpulse dragAngularFinal(0,0,0);
Vector vel;
AngularImpulse ang;
object->GetVelocity(&vel, &ang);
btVector3 bull_vel;
ConvertPosToBull(vel, bull_vel);
float dragForce = -0.5 * object->GetDragInDirection( &bull_vel ) * m_airDensity * dt;
if ( dragForce < -1.0f )
{
dragForce = -1.0f;
}
if ( dragForce < 0 )
{
Vector dragLinearFinal = vel * dragForce;
}
btVector3 bull_angimpulse;
ConvertAngularImpulseToBull(ang, bull_angimpulse);
float angDragForce = -object->GetAngularDragInDirection(&bull_angimpulse) * m_airDensity * dt;
if ( angDragForce < -1.0f )
{
angDragForce = -1.0f;
}
if( angDragForce < 0)
{
dragAngularFinal = ang * angDragForce;
}
object->AddVelocity(&dragLinearFinal, &dragAngularFinal);
}
}