/**
 * 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 sheetNode.I
 * @author drose
 * @date 2003-10-11
 */

/**
 *
 */
INLINE SheetNode::CData::
CData() {
  _surface = new NurbsSurfaceEvaluator;
  _use_vertex_color = false;
  _num_u_subdiv = 2;
  _num_v_subdiv = 2;
}

/**
 *
 */
INLINE SheetNode::CData::
CData(const SheetNode::CData &copy) :
  _surface(copy._surface),
  _use_vertex_color(copy._use_vertex_color),
  _num_u_subdiv(copy._num_u_subdiv),
  _num_v_subdiv(copy._num_v_subdiv)
{
}

/**
 * Sets the particular surface represented by the SheetNode.
 */
INLINE void SheetNode::
set_surface(NurbsSurfaceEvaluator *surface) {
  CDWriter cdata(_cycler);
  cdata->_surface = surface;
}

/**
 * Returns the surface represented by the SheetNode.
 */
INLINE NurbsSurfaceEvaluator *SheetNode::
get_surface() const {
  CDReader cdata(_cycler);
  return cdata->_surface;
}

/**
 * Sets the "use vertex color" flag.  When this is true, the R, G, B, A vertex
 * color is assumed to be stored as the dimensions 0, 1, 2, 3, respectively,
 * of the extended vertex values.  Use
 * NurbsCurveEvaluator::set_extended_vertex() to set these values.
 */
INLINE void SheetNode::
set_use_vertex_color(bool flag) {
  CDWriter cdata(_cycler);
  cdata->_use_vertex_color = flag;
}

/**
 * Returns the "use vertex color" flag.  See set_use_vertex_color().
 */
INLINE bool SheetNode::
get_use_vertex_color() const {
  CDReader cdata(_cycler);
  return cdata->_use_vertex_color;
}

/**
 * Specifies the number of subdivisions per cubic segment (that is, per unique
 * knot value) to draw in a fixed uniform tesselation of the surface in the U
 * direction.
 */
INLINE void SheetNode::
set_num_u_subdiv(int num_u_subdiv) {
  nassertv(num_u_subdiv >= 0);
  CDWriter cdata(_cycler);
  cdata->_num_u_subdiv = num_u_subdiv;
}

/**
 * Returns the number of subdivisions per cubic segment to draw in the U
 * direction.  See set_num_u_subdiv().
 */
INLINE int SheetNode::
get_num_u_subdiv() const {
  CDReader cdata(_cycler);
  return cdata->_num_u_subdiv;
}

/**
 * Specifies the number of subdivisions per cubic segment (that is, per unique
 * knot value) to draw in a fixed uniform tesselation of the surface in the V
 * direction.
 */
INLINE void SheetNode::
set_num_v_subdiv(int num_v_subdiv) {
  nassertv(num_v_subdiv >= 0);
  CDWriter cdata(_cycler);
  cdata->_num_v_subdiv = num_v_subdiv;
}

/**
 * Returns the number of subdivisions per cubic segment to draw in the V
 * direction.  See set_num_v_subdiv().
 */
INLINE int SheetNode::
get_num_v_subdiv() const {
  CDReader cdata(_cycler);
  return cdata->_num_v_subdiv;
}