本文整理汇总了C++中EngngModel::giveContext方法的典型用法代码示例。如果您正苦于以下问题：C++ EngngModel::giveContext方法的具体用法？C++ EngngModel::giveContext怎么用？C++ EngngModel::giveContext使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类EngngModel的用法示例。
在下文中一共展示了EngngModel::giveContext方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: doLagrangianPhase
void
LEPlic :: doLagrangianPhase(TimeStep *atTime)
{
//Maps element nodes along trajectories using basic Runge-Kutta method (midpoint rule)
int i, ci, ndofman = domain->giveNumberOfDofManagers();
int nsd = 2;
double dt = atTime->giveTimeIncrement();
DofManager *dman;
Node *inode;
IntArray velocityMask;
FloatArray x, x2(nsd), v_t, v_tn1;
FloatMatrix t;
#if 1
EngngModel *emodel = domain->giveEngngModel();
int err;
#endif
velocityMask.setValues(2, V_u, V_v);
updated_XCoords.resize(ndofman);
updated_YCoords.resize(ndofman);
for ( i = 1; i <= ndofman; i++ ) {
dman = domain->giveDofManager(i);
// skip dofmanagers with no position information
if ( ( dman->giveClassID() != NodeClass ) && ( dman->giveClassID() != RigidArmNodeClass ) && ( dman->giveClassID() != HangingNodeClass ) ) {
continue;
}
inode = ( Node * ) dman;
// get node coordinates
x = * ( inode->giveCoordinates() );
// get velocity field v(tn, x(tn)) for dof manager
#if 1
/* Original version */
dman->giveUnknownVector( v_t, velocityMask, EID_MomentumBalance, VM_Total, atTime->givePreviousStep() );
/* Modified version */
//dman->giveUnknownVector(v_t, velocityMask, EID_MomentumBalance, VM_Total, atTime);
// Original version
// compute updated position x(tn)+0.5*dt*v(tn,x(tn))
for ( ci = 1; ci <= nsd; ci++ ) {
x2.at(ci) = x.at(ci) + 0.5 *dt *v_t.at(ci);
}
// compute interpolated velocity field at x2 [ v(tn+1, x(tn)+0.5*dt*v(tn,x(tn))) = v(tn+1, x2) ]
Field *vfield;
vfield = emodel->giveContext()->giveFieldManager()->giveField(FT_Velocity);
if ( vfield == NULL ) {
_error("doLagrangianPhase: Velocity field not available");
}
err = vfield->evaluateAt(v_tn1, x2, VM_Total, atTime);
if ( err == 1 ) {
// point outside domain -> be explicit
v_tn1 = v_t;
} else if ( err != 0 ) {
_error2("doLagrangianPhase: vfield->evaluateAt failed, error code %d", err);
}
// compute final updated position
for ( ci = 1; ci <= nsd; ci++ ) {
x2.at(ci) = x.at(ci) + dt *v_tn1.at(ci);
}
#else
// pure explicit version
dman->giveUnknownVector(v_t, velocityMask, EID_MomentumBalance, VM_Total, atTime);
for ( ci = 1; ci <= nsd; ci++ ) {
x2.at(ci) = x.at(ci) + dt *v_t.at(ci);
}
#endif
// store updated node position
updated_XCoords.at(i) = x2.at(1);
updated_YCoords.at(i) = x2.at(2);
}
}