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/*
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* This file is a part of Poly2Tri-C
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* (c) Barak Itkin <lightningismyname@gmail.com>
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* http://code.google.com/p/poly2tri-c/
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* * Neither the name of Poly2Tri nor the names of its contributors may be
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* used to endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __P2TC_REFINE_PSLG_H__
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#define __P2TC_REFINE_PSLG_H__
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#include "utils.h"
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#include "vector2.h"
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#include "line.h"
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#include "bounded-line.h"
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typedef P2trHashSet P2trPSLG;
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typedef P2trHashSetIter P2trPSLGIter;
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/**
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* Create a new PSLG. After finishing to use this PSLG, it should be
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* freed by calling @ref p2tr_pslg_free
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* @return A new empty PSLG
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*/
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P2trPSLG* p2tr_pslg_new (void);
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/**
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* Add a new line to the PSLG, where the line is defined by two given
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* points.
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* @param[in] pslg The PSLG
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* @param[in] start The first edge-point of the new line to add
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* @param[in] end The second edge-point of the new line to add
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*/
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void p2tr_pslg_add_new_line (P2trPSLG *pslg,
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const P2trVector2 *start,
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const P2trVector2 *end);
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/**
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* Add an existing P2trBoundedLine to the PSLG, so that the line will
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* not be freed when the PSLG is freed. This line must not be freed
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* before the PSLG is freed!
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* @param[in] pslg The PSLG
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* @param[in] line The existing line to add
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*/
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void p2tr_pslg_add_existing_line (P2trPSLG *pslg,
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const P2trBoundedLine *line);
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/**
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* Count how many lines are there in the PSLG
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* @param[in] pslg The PSLG
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* @return The amount of lines in the PSLG
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*/
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guint p2tr_pslg_size (P2trPSLG *pslg);
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/**
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* Initialize an iterator to iterate over all the lines of the PSLG. The
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* iterator will remain valid as long as the PSLG is not modified.
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* @param[out] iter The iterator for this PSLG
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* @param[in] pslg The PSLG
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*/
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void p2tr_pslg_iter_init (P2trPSLGIter *iter,
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P2trPSLG *pslg);
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/**
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* Advance the iterator to the next line of the PSLG
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* @param[in] iter The PSLG iterator
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* @param[out] line The next line of the PSLG
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* @return TRUE if there was another line, FALSE if the iteration over
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* all the lines was finished
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*/
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gboolean p2tr_pslg_iter_next (P2trPSLGIter *iter,
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const P2trBoundedLine **line);
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/**
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* Test whether the PSLG contains this line. The line comparision is
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* done *by refrence* and not by value, so this function only test if
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* the line at the given memory location is inside the PSLG.
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* @param[in] pslg The PSLG
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* @param[in] line The line to search for
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* @return TRUE if the line was found in the PSLG, FALSE otherwise
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*/
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gboolean p2tr_pslg_contains_line (P2trPSLG *pslg,
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const P2trBoundedLine *line);
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/**
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* Free a PSLG and all of the resources allocated for it
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* @param[in] pslg The PSLG to free
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*/
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void p2tr_pslg_free (P2trPSLG *pslg);
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#endif
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