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/**
* $Id$
* ***** 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 *****
*/
/**
* $Id$
* Copyright (C) 2001 NaN Technologies B.V.
*/
#ifndef NAN_INCLUDED_LOD_ExternBufferEditor_h
#define NAN_INCLUDED_LOD_ExternBufferEditor_h
#include "LOD_MeshPrimitives.h"
#include <vector>
#include "LOD_ManMesh2.h"
#include "../extern/LOD_decimation.h"
// This class syncs external vertex/face buffers
// with the internal mesh representation during
// decimation.
class LOD_ExternBufferEditor
{
public :
static
LOD_ExternBufferEditor *
New(
LOD_Decimation_InfoPtr extern_info
){
if (extern_info == NULL) return NULL;
return new LOD_ExternBufferEditor(extern_info);
}
// update the external vertex buffer with vertices
// from the mesh
void
CopyModifiedVerts(
LOD_ManMesh2 & mesh,
const std::vector<LOD_VertexInd> & mod_vertices
){
std::vector<LOD_VertexInd>::const_iterator v_start = mod_vertices.begin();
std::vector<LOD_VertexInd>::const_iterator v_end = mod_vertices.end();
std::vector<LOD_Vertex> & mesh_verts = mesh.VertexSet();
float * const extern_vertex_ptr = m_extern_info->vertex_buffer;
for (; v_start != v_end; ++v_start) {
float * mod_vert = extern_vertex_ptr + int(*v_start)*3;
mesh_verts[*v_start].CopyPosition(mod_vert);
}
}
// update the external face buffer with faces from the mesh
void
CopyModifiedFaces(
LOD_ManMesh2 & mesh,
const std::vector<LOD_FaceInd> & mod_faces
){
std::vector<LOD_FaceInd>::const_iterator f_start = mod_faces.begin();
std::vector<LOD_FaceInd>::const_iterator f_end = mod_faces.end();
std::vector<LOD_TriFace> &mesh_faces = mesh.FaceSet();
int * const extern_face_ptr = m_extern_info->triangle_index_buffer;
for (; f_start != f_end; ++f_start) {
int *mod_face = extern_face_ptr + 3*int(*f_start);
mesh_faces[*f_start].CopyVerts(mod_face);
}
}
// Copy the last vertex over the vertex specified by
// vi. Decrement the size of the vertex array
void
CopyBackVertex(
LOD_VertexInd vi
){
float * const extern_vertex_ptr = m_extern_info->vertex_buffer;
int * extern_vertex_num = &(m_extern_info->vertex_num);
float * last_external_vert = extern_vertex_ptr + 3*((*extern_vertex_num) - 1);
float * external_vert = extern_vertex_ptr + 3*int(vi);
external_vert[0] = last_external_vert[0];
external_vert[1] = last_external_vert[1];
external_vert[2] = last_external_vert[2];
*extern_vertex_num -=1;
}
// Copy the last face over the face specified by fi
// Decrement the size of the face array
void
CopyBackFace(
LOD_FaceInd fi
) {
int * const extern_face_ptr = m_extern_info->triangle_index_buffer;
int * extern_face_num = &(m_extern_info->face_num);
int * last_external_face = extern_face_ptr + 3*((*extern_face_num) -1);
int * external_face = extern_face_ptr + 3*int(fi);
external_face[0] = last_external_face[0];
external_face[1] = last_external_face[1];
external_face[2] = last_external_face[2];
*extern_face_num -=1;
}
private :
LOD_ExternBufferEditor(
LOD_Decimation_InfoPtr extern_info
) :
m_extern_info (extern_info)
{
}
LOD_Decimation_InfoPtr const m_extern_info;
};
#endif
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