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CSG_BooleanOps.cpp

/**
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

/**

 * Implementation of external api for CSG part of BSP lib interface.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "../extern/CSG_BooleanOps.h"
#include "BSP_CSGMesh_CFIterator.h"
#include "MEM_RefCountPtr.h"

#include "../../boolop/extern/BOP_Interface.h"
#include <iostream>
using namespace std;

#include "BSP_MeshPrimitives.h"

struct BSP_MeshInfo {
      BSP_CSGMesh *output_mesh;
};

using namespace std;
      
      CSG_BooleanOperation * 
CSG_NewBooleanFunction(
      void
){
      BSP_MeshInfo * mesh_info = new BSP_MeshInfo;
      CSG_BooleanOperation * output = new CSG_BooleanOperation;

      if (mesh_info==NULL || output==NULL) return NULL;

      mesh_info->output_mesh = NULL;
      output->CSG_info = mesh_info;

      return output;
}
      
/**
 * Compute the boolean operation, UNION, INTERSECION or DIFFERENCE
 */
      int
CSG_PerformBooleanOperation(
      CSG_BooleanOperation                *operation,
      CSG_OperationType                   op_type,
      CSG_FaceIteratorDescriptor          obAFaces,
      CSG_VertexIteratorDescriptor  obAVertices,
      CSG_FaceIteratorDescriptor          obBFaces,
      CSG_VertexIteratorDescriptor  obBVertices
){
      if (operation == NULL) return 0;
      BSP_MeshInfo * mesh_info = static_cast<BSP_MeshInfo *>(operation->CSG_info);
      if (mesh_info == NULL) return 0;

      obAFaces.Reset(obAFaces.it);
      obBFaces.Reset(obBFaces.it);
      obAVertices.Reset(obAVertices.it);
      obBVertices.Reset(obBVertices.it);

      BoolOpType boolType;
      
      switch( op_type ) {
      case e_csg_union:
        boolType = BOP_UNION;
        break;
      case e_csg_difference:
        boolType = BOP_DIFFERENCE;
        break;
      default:
        boolType = BOP_INTERSECTION;
        break;
      }

      BoolOpState boolOpResult;
      try {
      boolOpResult = BOP_performBooleanOperation( boolType,
                             (BSP_CSGMesh**) &(mesh_info->output_mesh),
                               obAFaces, obAVertices, obBFaces, obBVertices);
      }
      catch(...) {
            return 0;
      }

      switch (boolOpResult) {
      case BOP_OK: return 1;
      case BOP_NO_SOLID: return -2;
      case BOP_ERROR: return 0;
      default: return 1;
      }
}

      int
CSG_OutputFaceDescriptor(
      CSG_BooleanOperation * operation,
      CSG_FaceIteratorDescriptor * output
){
      if (operation == NULL) return 0;
      BSP_MeshInfo * mesh_info = static_cast<BSP_MeshInfo *>(operation->CSG_info);

      if (mesh_info == NULL) return 0;
      if (mesh_info->output_mesh == NULL) return 0;

      BSP_CSGMesh_FaceIt_Construct(mesh_info->output_mesh,output);
      return 1;
}


      int
CSG_OutputVertexDescriptor(
      CSG_BooleanOperation * operation,
      CSG_VertexIteratorDescriptor *output
){
      if (operation == NULL) return 0;
      BSP_MeshInfo * mesh_info = static_cast<BSP_MeshInfo *>(operation->CSG_info);

      if (mesh_info == NULL) return 0;
      if (mesh_info->output_mesh == NULL) return 0;

      BSP_CSGMeshVertexIt_Construct(mesh_info->output_mesh,output);
      return 1;
}

      void
CSG_FreeVertexDescriptor(
      CSG_VertexIteratorDescriptor * v_descriptor
){    
      BSP_CSGMesh_VertexIt_Destruct(v_descriptor);
}     


      void
CSG_FreeFaceDescriptor(
      CSG_FaceIteratorDescriptor * f_descriptor
){
      BSP_CSGMesh_FaceIt_Destruct(f_descriptor);
}


      void
CSG_FreeBooleanOperation(
      CSG_BooleanOperation *operation
){
      if (operation != NULL) {
            BSP_MeshInfo * mesh_info = static_cast<BSP_MeshInfo *>(operation->CSG_info);

            delete (mesh_info->output_mesh);
            delete(mesh_info);
            delete(operation);
      }
}


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