//===========================================================================
// Copyright (C) 1998, 2000-2007, 2010, 2011, 2012 SINTEF ICT, Applied
// Mathematics, Norway.
//
// This file is part of GoTools
//
// This program is free software; you can redistribute it and/or          
// modify it under the terms of the GNU General Public License            
// as published by the Free Software Foundation version 2 of the License. 
//
// This program is distributed in the hope that it will be useful,        
// but WITHOUT ANY WARRANTY; without even the implied warranty of         
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          
// GNU General Public License for more details.                           
//
// You should have received a copy of the GNU General Public License      
// along with this program; if not, see <http://www.gnu.org/licenses>
//
// Contact information: E-mail: tor.dokken@sintef.no                      
// SINTEF ICT, Department of Applied Mathematics,                         
// P.O. Box 124 Blindern,                                                 
// 0314 Oslo, Norway.                                                     
//
// Other licenses are also available for this software, notably licenses
// for:
// - Building commercial software.                                        
// - Building software whose source code you wish to keep private.        
//===========================================================================

#include "GoTools/trivariate/SplineVolume.h"

using namespace std;

namespace Go {


//==========================================================================
void SplineVolume::makeBernsteinKnots(int pardir)
//==========================================================================
{
    // @@ WARNING: Comparing floating point numbers for equality.

    vector<double> new_knots;
    SplineVolume the_volume = *this;
    int k = order(pardir); // Order of spline volume in specified direction

    // Loop through knot vector
    vector<double>::const_iterator iter = the_volume.basis(pardir).begin();
    while (iter != the_volume.basis(pardir).end()) {
	// Finds how many equal knots there are
	int counter = 1;
	while (iter+counter != the_volume.basis(pardir).end()
	       && *iter == *(iter+counter))
	    ++counter;

	ALWAYS_ERROR_IF(counter > k, "More equal knots than order.");

	// Fill up knots
	new_knots.insert(new_knots.end(), k - counter, *iter);

	iter += counter;
    }

    the_volume.insertKnot(pardir,new_knots);
    *this = the_volume;
    return;
}

//==========================================================================
int SplineVolume::numberOfPatches(int pardir) const
//==========================================================================
{
    // @@ WARNING: Comparing floating point numbers for equality.

    // Loop through knot vector
    vector<double>::const_iterator iter = basis(pardir).begin()+order(pardir)-1;
    int num = 0;
    while (iter != basis(pardir).begin()+numCoefs(pardir)) {
	int counter = 1;
	// Finds how many equal knots there are
	while (*iter == *(iter+counter)
	       && iter+counter != basis(pardir).begin()+numCoefs(pardir))
	    ++counter;
	++num;
	iter += counter;
    }

    return num;
}



} // namespace Go;
