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CSG_BooleanOps.cpp

/**
 * $Id: CSG_BooleanOps.cpp,v 1.4 2003/01/12 19:48:50 loczar Exp $
 * ***** BEGIN GPL/BL DUAL 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. The Blender
 * Foundation also sells licenses for use in proprietary software under
 * the Blender License.  See http://www.blender.org/BL/ for information
 * about this.
 *
 * 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/BL DUAL 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 "BSP_CSGMeshBuilder.h"
#include "BSP_CSGHelper.h"
#include "BSP_CSGUserData.h"
#include "MEM_RefCountPtr.h"

00048 struct BSP_MeshInfo {
      MEM_RefCountPtr<BSP_CSGMesh> output_mesh;
      CSG_MeshPropertyDescriptor obA_descriptor;
      CSG_MeshPropertyDescriptor obB_descriptor;
      CSG_MeshPropertyDescriptor output_descriptor;
};

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;
}
      
      CSG_MeshPropertyDescriptor
CSG_DescibeOperands(
      CSG_BooleanOperation * operation,
      CSG_MeshPropertyDescriptor operandA_desciption,
      CSG_MeshPropertyDescriptor operandB_desciption
){
      BSP_MeshInfo * mesh_info = static_cast<BSP_MeshInfo *>(operation->CSG_info);

      mesh_info->obA_descriptor = operandA_desciption;
      mesh_info->obB_descriptor = operandB_desciption;

      if (
            (operandA_desciption.user_data_size == operandB_desciption.user_data_size) &&
            (operandA_desciption.user_face_vertex_data_size == operandB_desciption.user_face_vertex_data_size)
      ) {
            // Then both operands have the same sets of data we can cope with this!
            mesh_info->output_descriptor.user_data_size = operandA_desciption.user_data_size;
            mesh_info->output_descriptor.user_face_vertex_data_size = operandA_desciption.user_face_vertex_data_size;
      } else {
            // There maybe some common subset of data we can seperate out but for now we just use the 
            // default 
            mesh_info->output_descriptor.user_data_size = 0;
            mesh_info->output_descriptor.user_face_vertex_data_size = 0;
      }
      return mesh_info->output_descriptor;
}

      int
CSG_PerformBooleanOperation(
      CSG_BooleanOperation * operation,
      CSG_OperationType op_type,
      CSG_FaceIteratorDescriptor obAFaces,
      CSG_VertexIteratorDescriptor obAVertices,
      CSG_FaceIteratorDescriptor obBFaces,
      CSG_VertexIteratorDescriptor obBVertices,
      CSG_InterpolateUserFaceVertexDataFunc interp_func
){
      
      if (operation == NULL) return 0;
      BSP_MeshInfo * mesh_info = static_cast<BSP_MeshInfo *>(operation->CSG_info);
      if (mesh_info == NULL) return 0;

      bool success = 0;

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


      try {
            // Build the individual meshes
            
            MEM_SmartPtr<BSP_CSGMesh> obA = 
                  BSP_CSGMeshBuilder::NewMesh(mesh_info->obA_descriptor,obAFaces,obAVertices);

            MEM_SmartPtr<BSP_CSGMesh> obB = 
                  BSP_CSGMeshBuilder::NewMesh(mesh_info->obB_descriptor,obBFaces,obBVertices);

            // create an empty vertex array for the output mesh 
            MEM_SmartPtr<vector<BSP_MVertex> > output_verts(new vector<BSP_MVertex>);
            // and some user data arrays matching the output descriptor

            MEM_SmartPtr<BSP_CSGUserData> output_f_data = new BSP_CSGUserData(
                  mesh_info->output_descriptor.user_data_size
            );
            MEM_SmartPtr<BSP_CSGUserData> output_fv_data = new BSP_CSGUserData(
                  mesh_info->output_descriptor.user_face_vertex_data_size
            );

            // create the output mesh!
            mesh_info->output_mesh = BSP_CSGMesh::New();

            if (
                  obA == NULL ||
                  obB == NULL ||
                  output_verts == NULL ||
                  mesh_info->output_mesh == NULL ||
                  output_f_data == NULL ||
                  output_fv_data == NULL
            ) {
                  return 0;
            }

            mesh_info->output_mesh->SetVertices(output_verts);
            mesh_info->output_mesh->SetFaceData(output_f_data);
            mesh_info->output_mesh->SetFaceVertexData(output_fv_data);

            BSP_CSGHelper helper;
            // translate enums!

            switch(op_type) {
                  case e_csg_union : 
                  case e_csg_classify :
                        success = helper.ComputeOp(obA,obB,e_intern_csg_union,
                              mesh_info->output_mesh.Ref(),interp_func
                        );
                        break;
                  case e_csg_intersection :
                        success = helper.ComputeOp(obA,obB,e_intern_csg_intersection,
                              mesh_info->output_mesh.Ref(),interp_func
                        );
                        break;
                  case e_csg_difference :
                        success = helper.ComputeOp(obA,obB,e_intern_csg_difference,
                              mesh_info->output_mesh.Ref(),interp_func
                        );
                        break;
                  default :
                        success = 0;
            }
      }
      catch(...) {
            return 0;
      }

      return success;
}

      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);
            delete(operation);
      }
}













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