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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 *****
*/
// implementation of external c api
#include "../extern/LOD_decimation.h"
#include "LOD_DecimationClass.h"
using namespace std;
int
LOD_LoadMesh(
LOD_Decimation_InfoPtr info
) {
if (info == NULL) return 0;
if (
info->vertex_buffer == NULL ||
info->vertex_normal_buffer == NULL ||
info->triangle_index_buffer == NULL
) {
return 0;
}
// create the intern object to hold all
// the decimation classes
MEM_SmartPtr<LOD_DecimationClass> intern(LOD_DecimationClass::New(info));
if (intern == NULL) return 0;
MEM_SmartPtr<vector<LOD_Vertex> > intern_vertex_buffer(new vector<LOD_Vertex>(info->vertex_num));
if (intern_vertex_buffer == NULL) return 0;
vector<LOD_Vertex>::iterator intern_vertex_it(intern_vertex_buffer->begin());
// now load in the vertices to the mesh
const int vertex_stride = 3;
float * vertex_ptr = info->vertex_buffer;
const float * vertex_end = vertex_ptr + info->vertex_num*vertex_stride;
LOD_ManMesh2 &mesh = intern->Mesh();
for (;vertex_ptr < vertex_end; vertex_ptr += vertex_stride,++intern_vertex_it) {
intern_vertex_it->pos = MT_Vector3(vertex_ptr);
}
mesh.SetVertices(intern_vertex_buffer);
// load in the triangles
const int triangle_stride = 3;
int * triangle_ptr = info->triangle_index_buffer;
const int * triangle_end = triangle_ptr + info->face_num*triangle_stride;
try {
for (;triangle_ptr < triangle_end; triangle_ptr += triangle_stride) {
mesh.AddTriangle(triangle_ptr);
}
}
catch (...) {
return 0;
}
// ok we have built the mesh
intern->m_e_decimation_state = LOD_DecimationClass::e_loaded;
info->intern = (void *) (intern.Release());
return 1;
}
int
LOD_PreprocessMesh(
LOD_Decimation_InfoPtr info
) {
if (info == NULL) return 0;
if (info->intern == NULL) return 0;
LOD_DecimationClass *intern = (LOD_DecimationClass *) info->intern;
if (intern->m_e_decimation_state != LOD_DecimationClass::e_loaded) return 0;
// arm the various internal classes so that we are ready to step
// through decimation
intern->FaceEditor().BuildNormals();
if (intern->Decimator().Arm() == false) return 0;
// ok preprocessing done
intern->m_e_decimation_state = LOD_DecimationClass::e_preprocessed;
return 1;
}
int
LOD_CollapseEdge(
LOD_Decimation_InfoPtr info
){
if (info == NULL) return 0;
if (info->intern == NULL) return 0;
LOD_DecimationClass *intern = (LOD_DecimationClass *) info->intern;
if (intern->m_e_decimation_state != LOD_DecimationClass::e_preprocessed) return 0;
bool step_result = intern->Decimator().Step();
return step_result == true ? 1 : 0;
}
int
LOD_FreeDecimationData(
LOD_Decimation_InfoPtr info
){
if (info == NULL) return 0;
if (info->intern == NULL) return 0;
LOD_DecimationClass *intern = (LOD_DecimationClass *) info->intern;
delete(intern);
info->intern = NULL;
return 1;
}
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