/**
 * 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 lineSegs.I
 * @author drose
 * @date 2002-03-16
 */

/**
 *
 */
INLINE LineSegs::Point::
Point() {
}

/**
 *
 */
INLINE LineSegs::Point::
Point(const LVecBase3 &point, const LColor &color) :
  _point(point[0], point[1], point[2]),
  _color(color)
{
}

/**
 *
 */
INLINE LineSegs::Point::
Point(const LineSegs::Point &copy) :
  _point(copy._point),
  _color(copy._color)
{
}

/**
 *
 */
INLINE void LineSegs::Point::
operator = (const LineSegs::Point &copy) {
  _point = copy._point;
  _color = copy._color;
}


/**
 * Establishes the color that will be assigned to all vertices created by
 * future calls to move_to() and draw_to().
 */
INLINE void LineSegs::
set_color(PN_stdfloat r, PN_stdfloat g, PN_stdfloat b, PN_stdfloat a) {
  _color.set(r, g, b, a);
}

/**
 * Establishes the color that will be assigned to all vertices created by
 * future calls to move_to() and draw_to().
 */
INLINE void LineSegs::
set_color(const LColor &color) {
  _color = color;
}

/**
 * Establishes the line thickness or point size in pixels that will be
 * assigned to all lines and points created by future calls to create().
 */
INLINE void LineSegs::
set_thickness(PN_stdfloat thick) {
  _thick = thick;
}

/**
 * Moves the pen to the given point without drawing a line.  When followed by
 * draw_to(), this marks the first point of a line segment; when followed by
 * move_to() or create(), this creates a single point.
 */
INLINE void LineSegs::
move_to(PN_stdfloat x, PN_stdfloat y, PN_stdfloat z) {
  move_to(LVertex(x, y, z));
}

/**
 * Draws a line segment from the pen's last position (the last call to move_to
 * or draw_to) to the indicated point.  move_to() and draw_to() only update
 * tables; the actual drawing is performed when create() is called.
 */
INLINE void LineSegs::
draw_to(PN_stdfloat x, PN_stdfloat y, PN_stdfloat z) {
  draw_to(LVertex(x, y, z));
}

/**
 * Creates a new GeomNode that will render the series of line segments and
 * points described via calls to move_to() and draw_to().  The lines and
 * points are created with the color and thickness established by calls to
 * set_color() and set_thick().
 *
 * If dynamic is true, the line segments will be created with the dynamic Geom
 * setting, optimizing them for runtime vertex animation.
 */
INLINE GeomNode *LineSegs::
create(bool dynamic) {
  GeomNode *gnode = new GeomNode(get_name());
  return create(gnode, dynamic);
}

/**
 * Returns the total number of line segment and point vertices generated by
 * the last call to create().  The positions of these vertices may be read and
 * adjusted through get_vertex() and set_vertex().
 */
INLINE int LineSegs::
get_num_vertices() const {
  if (_created_data == nullptr) {
    return 0;
  }
  return _created_data->get_num_rows();
}

/**
 * Moves the nth point or vertex of the line segment sequence generated by the
 * last call to create().  The first move_to() generates vertex 0; subsequent
 * move_to() and draw_to() calls generate consecutively higher vertex numbers.
 */
INLINE void LineSegs::
set_vertex(int n, PN_stdfloat x, PN_stdfloat y, PN_stdfloat z) {
  set_vertex(n, LVertex(x, y, z));
}

/**
 * Changes the vertex color of the nth point or vertex.  See set_vertex().
 */
INLINE void LineSegs::
set_vertex_color(int n, PN_stdfloat r, PN_stdfloat g, PN_stdfloat b, PN_stdfloat a) {
  set_vertex_color(n, LColor(r, g, b, a));
}