#include<maya/MItDag.h>
#include<maya/MFnNurbsSurface.h>

// create an iterator to go through all Nurbs Surface's
MItDag it(MItDag::kDepthFirst,MFn::kNurbsSurface);

while(!it.isDone())
{

// attach the function set to the object MFnNurbsSurface fn(it.item()); // only want non-history items if( !fn.isIntermediateObject() ) {   // print surface name cout<<"Nurb "<< fn.name().asChar() <<endl; // described in the sections below outputSurfacePoints(it.item()); outputSurfaceKnots(it.item()); outputSurfaceInfo(it.item()); OutputNurbsTrimData(it.item()); } // get next surface it.next();

}

#include<maya/MFnNurbsSurface.h>
#include<maya/MPointArray.h>

void outputSurfacePoints(MObject& obj)
{

// attach the function set to the object MFnNurbsSurface fn(obj); // this will hold the returned control points MPointArray vts; // use the function set to get the points fn.getPoints(vts); // write number of cvs cout << "NumCVsU " << fn.numCVsInU() << endl; cout << "NumCVsV " << fn.numCVsInV() << endl; // loop through all points for(int i=0;i!=vts.length();++i) {   // print control point cout << vts[i].x <<" " << vts[i].y <<" " << vts[i].z << "\n"; }

}

#include<maya/MFnNurbsCurve.h>

void outputSurfaceKnots(MFnNurbsSurface& obj)
{

// attach the function set to the object MFnNurbsSurface fn(obj); // write number of knots in the u direction cout<< "NumKnotsU "<< (fn.numKnotsInU()+2) << endl; // write first knot that maya ignores. invent knot // value for a clamped or periodic curve. if( (fn.knotInU(1) - fn.knotInU(0)) < 0.01f )   cout << fn.knotInU(0) << " "; else   cout << ( fn.knotInU( 0 ) - 1 ) << " "; // write rest of the knots for( int i=0; i<fn.numKnotsInU(); ++i )   cout << fn.knotInU(i) << " "; // write last knot (that maya ignores) if( (fn.knotInU(1) - fn.knotInU(0)) < 0.01f )   cout<<(fn.knotInU(fn.numKnotsInU()-1))<<"\n"; else   cout<<(fn.knotInU(fn.numKnotsInU()-1)+1)<<"\n"; // write number of knots in v direction cout<< "NumKnotsV"<< (fn.numKnotsInV()+2) << endl; // write first knot that maya ignores. invent knot // value for a clamped or periodic curve. if( (fn.knotInV(1) - fn.knotInV(0)) < 0.01f )   cout << fn.knotInV(0) << " "; else   cout << ( fn.knotInV( 0 ) - 1 ) << " "; // write rest of the knots for( int i=0; i<fn.numKnotsInV(); ++i )   cout << fn.knotInV(i) << " "; // write last knot (that maya ignores) if( (fn.knotInV(1) - fn.knotInV(0)) < 0.01f )   cout<<(fn.knotInV(fn.numKnotsInV()-1))<<"\n"; else   cout<<(fn.knotInV(fn.numKnotsInV()-1)+1)<<"\n";

}

#include<maya/MFnNurbsSurface.h>

void outputSurfaceInfo(MObject& obj)
{

// attach the function set to the object MFnNurbsSurface fn(obj); // get the curve degree in the U and V directions cout << "degreeU " << fn.degreeInU() << endl; cout << "degreeV " << fn.degreeInV() << endl; // get the curve order in the U and V directions cout << "orderU " << (fn.degreeInU()+1) << endl; cout << "orderV " << (fn.degreeInV()+1) << endl; // write the u surface type switch(fn.formInU()) {   // the curve type is open case MFnNurbsSurface::kOpen: cout << "utype open" << endl; break; // the curve type is closed case MFnNurbsSurface::kClosed: cout << "utype closed" << endl; break; // the curve type is periodic case MFnNurbsSurface::kPeriodic: cout << "utype periodic" << endl; break; // shouldn't get here default: break; } // write the v surface type switch(fn.formInV()) {   // the curve type is open case MFnNurbsSurface::kOpen: cout << "vtype open" << endl; break; // the curve type is closed case MFnNurbsSurface::kClosed: cout << "vtype closed" << endl; break; // the curve type is periodic case MFnNurbsSurface::kPeriodic: cout << "vtype periodic" << endl; break; // shouldn't get here default: break; }

}