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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_LINE_H__
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#define __P2TC_REFINE_LINE_H__
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#include <glib.h>
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#include "vector2.h"
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/* A line is the equation of the following form:
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* a * X + b * Y + c = 0
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*/
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typedef struct {
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gdouble a, b, c;
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} P2trLine;
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typedef enum
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{
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P2TR_LINE_RELATION_INTERSECTING = 0,
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P2TR_LINE_RELATION_PARALLEL = 1,
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P2TR_LINE_RELATION_SAME = 2
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} P2trLineRelation;
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void p2tr_line_init (P2trLine *line,
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gdouble a,
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gdouble b,
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gdouble c);
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gboolean p2tr_line_different_sides (const P2trLine *line,
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const P2trVector2 *pt1,
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const P2trVector2 *pt2);
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P2trLineRelation p2tr_line_intersection (const P2trLine *l1,
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const P2trLine *l2,
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P2trVector2 *out_intersection);
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#endif
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