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Diffstat (limited to 'include/2geom/bezier-to-sbasis.h')
-rw-r--r-- | include/2geom/bezier-to-sbasis.h | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/include/2geom/bezier-to-sbasis.h b/include/2geom/bezier-to-sbasis.h new file mode 100644 index 0000000..73c55d9 --- /dev/null +++ b/include/2geom/bezier-to-sbasis.h @@ -0,0 +1,94 @@ +/** + * \file + * \brief Conversion between Bezier control points and SBasis curves + *//* + * Copyright 2006 Nathan Hurst <njh@mail.csse.monash.edu.au> + * + * This library is free software; you can redistribute it and/or + * modify it either under the terms of the GNU Lesser General Public + * License version 2.1 as published by the Free Software Foundation + * (the "LGPL") or, at your option, under the terms of the Mozilla + * Public License Version 1.1 (the "MPL"). If you do not alter this + * notice, a recipient may use your version of this file under either + * the MPL or the LGPL. + * + * You should have received a copy of the LGPL along with this library + * in the file COPYING-LGPL-2.1; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * You should have received a copy of the MPL along with this library + * in the file COPYING-MPL-1.1 + * + * The contents of this file are subject to the Mozilla Public License + * Version 1.1 (the "License"); you may not use this file except in + * compliance with the License. You may obtain a copy of the License at + * http://www.mozilla.org/MPL/ + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY + * OF ANY KIND, either express or implied. See the LGPL or the MPL for + * the specific language governing rights and limitations. + * + */ + +#ifndef LIB2GEOM_SEEN_BEZIER_TO_SBASIS_H +#define LIB2GEOM_SEEN_BEZIER_TO_SBASIS_H + +#include <2geom/coord.h> +#include <2geom/point.h> +#include <2geom/d2.h> +#include <2geom/sbasis-to-bezier.h> + +namespace Geom +{ + +#if 0 +inline SBasis bezier_to_sbasis(Coord const *handles, unsigned order) { + if(order == 0) + return Linear(handles[0]); + else if(order == 1) + return Linear(handles[0], handles[1]); + else + return multiply(Linear(1, 0), bezier_to_sbasis(handles, order-1)) + + multiply(Linear(0, 1), bezier_to_sbasis(handles+1, order-1)); +} + + +template <typename T> +inline D2<SBasis> handles_to_sbasis(T const &handles, unsigned order) +{ + double v[2][order+1]; + for(unsigned i = 0; i <= order; i++) + for(unsigned j = 0; j < 2; j++) + v[j][i] = handles[i][j]; + return D2<SBasis>(bezier_to_sbasis(v[0], order), + bezier_to_sbasis(v[1], order)); +} +#endif + + +template <typename T> +inline +D2<SBasis> handles_to_sbasis(T const& handles, unsigned order) +{ + D2<SBasis> sbc; + size_t sz = order + 1; + std::vector<Point> v; + v.reserve(sz); + for (size_t i = 0; i < sz; ++i) + v.push_back(handles[i]); + bezier_to_sbasis(sbc, v); + return sbc; +} + +} // end namespace Geom + +#endif // LIB2GEOM_SEEN_BEZIER_TO_SBASIS_H +/* + Local Variables: + mode:c++ + c-file-style:"stroustrup" + c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) + indent-tabs-mode:nil + fill-column:99 + End: +*/ +// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 : |