Method addB

DEVELOPER/system/SkylineSPD.cpp:326–361

    
int 
SkylineSPD::addB(const Vector &v, const ID &id, double fact)
{
    
    // check for a quick return 
    if (fact == 0.0)  return 0;

    // check that m and id are of similar size
    int idSize = id.Size();        
    if (idSize != v.Size() ) {
	opserr << "SkylineSPD::addB() -";
	opserr << " Vector and ID not of similar sizes\n";
	return -1;
    }    
    
    if (fact == 1.0) { // do not need to multiply if fact == 1.0
	for (int i=0; i<id.Size(); i++) {
	    int pos = id(i);
	    if (pos <size && pos >= 0)
		B[pos] += v(i);
	}
    } else if (fact == -1.0) { // do not need to multiply if fact == -1.0
	for (int i=0; i<id.Size(); i++) {
	    int pos = id(i);
	    if (pos <size && pos >= 0)
		B[pos] -= v(i);
	}
    } else {
	for (int i=0; i<id.Size(); i++) {
	    int pos = id(i);
	    if (pos <size && pos >= 0)
		B[pos] += v(i) * fact;
	}
    }	
    return 0;
}


int