Function OPS_sectionStiffness

SRC/interpreter/OpenSeesOutputCommands.cpp:2769–2853

}

int OPS_sectionStiffness()
{
    // make sure at least one other argument to contain type of system
    if (OPS_GetNumRemainingInputArgs() < 2) {
	opserr << "WARNING want - sectionStiffness eleTag? secNum? \n";
	return -1;
    }

    //opserr << "sectionStiffness: ";
    //for (int i = 0; i < argc; i++)
    //  opserr << argv[i] << ' ' ;
    //opserr << endln;

    int numdata = 2;
    int data[2];

    if (OPS_GetIntInput(&numdata, data) < 0) {
	opserr << "WARNING sectionStiffness eleTag? secNum? - could not read int input? \n";
	return -1;
    }

    int tag = data[0];
    int secNum = data[1];

    Domain* theDomain = OPS_GetDomain();
    if (theDomain == 0) return -1;

    Element *theElement = theDomain->getElement(tag);
    if (theElement == 0) {
	opserr << "WARNING sectionStiffness element with tag " << tag << " not found in domain \n";
	return -1;
    }

    int argcc = 3;
    char a[80] = "section";
    char b[80];
    sprintf(b, "%d", secNum);
    char c[80] = "stiffness";
    const char *argvv[3];
    argvv[0] = a;
    argvv[1] = b;
    argvv[2] = c;

    DummyStream dummy;

    Response *theResponse = theElement->setResponse(argvv, argcc, dummy);
    if (theResponse == 0) {
	return 0;
    }

    theResponse->getResponse();
    Information &info = theResponse->getInformation();

    const Matrix &theMat = *(info.theMatrix);
    int nsdof = theMat.noCols();
    int size = nsdof*nsdof;
    if (size == 0) {
        if (OPS_SetDoubleOutput(&size, 0, false) < 0) {