/**
 * PANDA 3D SOFTWARE
 * Copyright (c) Carnegie Mellon University.  All rights reserved.
 *
 * All use of this software is subject to the terms of the revised BSD
 * license.  You should have received a copy of this license along
 * with this source code in a file named "LICENSE."
 *
 * @file triangulator.I
 * @author drose
 * @date 2007-01-18
 */

/**
 * Adds a new vertex to the vertex pool.  Returns the vertex index number.
 */
INLINE int Triangulator::
add_vertex(double x, double y) {
  return add_vertex(LPoint2d(x, y));
}

/**
 * Returns the number of vertices in the pool.  Note that the Triangulator
 * might append new vertices, in addition to those added by the user, if any
 * of the polygon is self-intersecting, or if any of the holes intersect some
 * part of the polygon edges.
 */
INLINE int Triangulator::
get_num_vertices() const {
  return _vertices.size();
}

/**
 * Returns the nth vertex.
 */
INLINE const LPoint2d &Triangulator::
get_vertex(int n) const {
  nassertr(n >= 0 && n < (int)_vertices.size(), LPoint2d::zero());
  return _vertices[n];
}

/**
 * Returns true if the polygon vertices are listed in counterclockwise order,
 * or false if they appear to be listed in clockwise order.
 */
INLINE bool Triangulator::
is_left_winding() const {
  return check_left_winding(_polygon);
}

/**
 *
 */
INLINE Triangulator::Triangle::
Triangle(Triangulator *t, int v0, int v1, int v2) :
  _v0(t->vert[v0].user_i),
  _v1(t->vert[v1].user_i),
  _v2(t->vert[v2].user_i)
{
}

/**
 *
 */
INLINE Triangulator::segment_t::
segment_t() {
}

/**
 *
 */
INLINE Triangulator::segment_t::
segment_t(Triangulator *t, int v0_i, int v1_i, int prev, int next) :
  is_inserted(false),
  root0(0), root1(0),
  next(next),
  prev(prev),
  v0_i(v0_i)
{
  v0.x = t->_vertices[v0_i][0];
  v0.y = t->_vertices[v0_i][1];

  v1.x = t->_vertices[v1_i][0];
  v1.y = t->_vertices[v1_i][1];
}