# Class MoreauJeanDirectProjectionOSI¶

class MoreauJeanDirectProjectionOSI : public MoreauJeanOSI

One Step time Integrator for First Order Dynamical Systems for mechanical Systems (LagrangianDS and NewtonEulerDS) with Direct Projection Algorithm.

This class reimplement a special activation of constraints in the MoreauJeanOSI for the Direct Projection Algorithm

References :

V. Acary. Projected event-capturing time-stepping schemes for nonsmooth mechanical systems with unilateral contact and coulomb’s friction. Computer Methods in Applied Mechanics and Engineering, 256:224 – 250, 2013. ISSN 0045-7825. URL http://www.sciencedirect.com/science/article/pii/S0045782512003829.

Public Functions

MoreauJeanDirectProjectionOSI(double theta)

constructor from theta value only

Parameters
• theta: value for all these DS.

MoreauJeanDirectProjectionOSI(double theta, double gamma)

constructor from theta value only

Parameters
• theta: value for all these DS.

• gamma: value for all these DS.

virtual ~MoreauJeanDirectProjectionOSI()

destructor

ACCEPT_STD_VISITORS()

visitors hook

bool addInteractionInIndexSet(SP::Interaction inter, unsigned int i)

Apply the rule to one Interaction to known if is it should be included in the IndexSet of level i.

Return

bool

Parameters
• inter: concerned interaction

• i: level

void computeFreeState()

Perform the integration of the dynamical systems linked to this integrator without taking into account the nonsmooth input (_r or _p)

void initializeWorkVectorsForDS(double t, SP::DynamicalSystem ds)

initialization of the work vectors and matrices (properties) related to one dynamical system on the graph and needed by the osi

Parameters
• t: time of initialization

• ds: the dynamical system

void initializeWorkVectorsForInteraction(Interaction &inter, InteractionProperties &interProp, DynamicalSystemsGraph &DSG)

initialization of the work vectors and matrices (properties) related to one interaction on the graph and needed by the osi

Parameters
• inter: the interaction

• interProp: the properties on the graph

• DSG: the dynamical systems graph

unsigned int numberOfIndexSets() const

get the number of index sets required for the simulation

Return

unsigned int

bool removeInteractionFromIndexSet(SP::Interaction inter, unsigned int i)

Apply the rule to one Interaction to known if is it should be removed in the IndexSet of level i.

Return

bool

Parameters
• inter: concerned interaction

• i: level