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/**************************************************************************/
/* triangulate.h */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**************************************************************************/
#ifndef TRIANGULATE_H
#define TRIANGULATE_H
#include "core/math/vector2.h"
#include "core/templates/vector.h"
/*
https://www.flipcode.com/archives/Efficient_Polygon_Triangulation.shtml
*/
class Triangulate {
public:
// triangulate a contour/polygon, places results in STL vector
// as series of triangles.
static bool triangulate(const Vector<Vector2> &contour, Vector<int> &result);
// compute area of a contour/polygon
static real_t get_area(const Vector<Vector2> &contour);
// decide if point Px/Py is inside triangle defined by
// (Ax,Ay) (Bx,By) (Cx,Cy)
static bool is_inside_triangle(real_t Ax, real_t Ay,
real_t Bx, real_t By,
real_t Cx, real_t Cy,
real_t Px, real_t Py,
bool include_edges);
private:
static bool snip(const Vector<Vector2> &p_contour, int u, int v, int w, int n, const Vector<int> &V, bool relaxed);
};
#endif // TRIANGULATE_H
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