dxfToEggLayer.cxx

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/**
 * 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 dxfToEggLayer.cxx
 * @author drose
 * @date 2004-05-04
 */

#include "dxfToEggLayer.h"
#include "dxfToEggConverter.h"

#include "dxfFile.h"
#include "eggGroup.h"
#include "eggPolygon.h"
#include "eggLine.h"
#include "eggVertex.h"
#include "eggVertexPool.h"


/**
 *
 */
DXFToEggLayer::
DXFToEggLayer(const std::string &name, EggGroupNode *parent) : DXFLayer(name) {
  _group = new EggGroup(name);
  parent->add_child(_group);
  _vpool = new EggVertexPool(name);
  _group->add_child(_vpool);
}


/**
 * Given that done_entity() has just been called and that the current entity
 * represents a polygon, adds the corresponding polygon to the layer's
 * EggGroup and vertex pool.
 */
void DXFToEggLayer::
add_polygon(const DXFToEggConverter *entity) {
  EggPolygon *poly = new EggPolygon;
  _group->add_child(poly);

  const DXFFile::Color &color = entity->get_color();
  poly->set_color(LColor(color.r, color.g, color.b, 1.0));

  // A polyline's vertices are stored in the attached vector by dxf.cxx.  They
  // were defined in the DXF file using a series of "VERTEX" entries.

  // For a 3dface, the vertices are defined explicitly as part of the entity;
  // but in this case, they were added to the vector before add_polygon() was
  // called.

  DXFVertices::const_iterator vi;
  for (vi = entity->_verts.begin();
       vi != entity->_verts.end();
       ++vi) {
    poly->add_vertex(add_vertex(*vi));
  }

  poly->cleanup();
}


/**
 * Similar to add_polygon(), but adds a set of point lights instead.
 */
void DXFToEggLayer::
add_line(const DXFToEggConverter *entity) {
  EggLine *line = new EggLine;
  _group->add_child(line);

  const DXFFile::Color &color = entity->get_color();
  line->set_color(LColor(color.r, color.g, color.b, 1.0));

  DXFVertices::const_iterator vi;
  for (vi = entity->_verts.begin();
       vi != entity->_verts.end();
       ++vi) {
    line->add_vertex(add_vertex(*vi));
  }
}


/**
 * Adds a unique vertex to the layer's vertex pool and returns it.  If the
 * vertex was already defined previously, returns the original definition.
 * This is designed to share the common vertices within a layer.
 */
EggVertex *DXFToEggLayer::
add_vertex(const DXFVertex &vert) {
  EggVertex egg_vert;
  egg_vert.set_pos(vert._p);

  return _vpool->create_unique_vertex(egg_vert);
}