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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 *****
*/
#include "BSP_CSGMeshBuilder.h"
using namespace std;
MEM_SmartPtr<BSP_CSGMesh>
BSP_CSGMeshBuilder::
NewMesh(
CSG_MeshPropertyDescriptor &props,
CSG_FaceIteratorDescriptor &face_it,
CSG_VertexIteratorDescriptor &vertex_it
) {
MEM_SmartPtr<BSP_CSGMesh> mesh = BSP_CSGMesh::New();
if (mesh == NULL) return NULL;
MEM_SmartPtr<BSP_CSGUserData> fv_data = new BSP_CSGUserData(props.user_face_vertex_data_size);
MEM_SmartPtr<BSP_CSGUserData> face_data = new BSP_CSGUserData(props.user_data_size);
MEM_SmartPtr<vector<BSP_MVertex> > vertices(new vector<BSP_MVertex>);
if (vertices == NULL || fv_data == NULL || face_data == NULL) return NULL;
// The size of the vertex data array will be at least the number of faces.
fv_data->Reserve(face_it.num_elements);
face_data->Reserve(face_it.num_elements);
vertices->reserve(vertex_it.num_elements);
CSG_IVertex vertex;
while (!vertex_it.Done(vertex_it.it)) {
vertex_it.Fill(vertex_it.it,&vertex);
MT_Point3 pos(vertex.position);
vertices->push_back(BSP_MVertex(pos));
vertex_it.Step(vertex_it.it);
}
// pass ownership of the vertices to the mesh.
mesh->SetVertices(vertices);
// now for the polygons.
CSG_IFace face;
// we may need to decalare some memory for user defined face properties.
if (props.user_data_size) {
face.user_face_data = new char[props.user_data_size];
} else {
face.user_face_data = NULL;
}
if (props.user_face_vertex_data_size) {
char * fv_data = NULL;
fv_data = new char[4 * props.user_face_vertex_data_size];
face.user_face_vertex_data[0] = fv_data;
face.user_face_vertex_data[1] = fv_data + props.user_face_vertex_data_size;
face.user_face_vertex_data[2] = fv_data + 2*props.user_face_vertex_data_size;
face.user_face_vertex_data[3] = fv_data + 3*props.user_face_vertex_data_size;
} else {
face.user_face_vertex_data[0] = NULL;
face.user_face_vertex_data[1] = NULL;
face.user_face_vertex_data[2] = NULL;
face.user_face_vertex_data[3] = NULL;
}
int tri_index[3];
int fv_index[3];
while (!face_it.Done(face_it.it)) {
face_it.Fill(face_it.it,&face);
// Let's not rely on quads being coplanar - especially if they
// are coming out of that soup of code from blender...
if (face.vertex_number == 4) {
tri_index[0] = face.vertex_index[2];
tri_index[1] = face.vertex_index[3];
tri_index[2] = face.vertex_index[0];
fv_index[0] = fv_data->Duplicate(face.user_face_vertex_data[2]);
fv_index[1] = fv_data->Duplicate(face.user_face_vertex_data[3]);
fv_index[2] = fv_data->Duplicate(face.user_face_vertex_data[0]);
mesh->AddPolygon(tri_index,fv_index,3);
// bit of an unspoken relationship between mesh face buffer
// and the face data which I guess should be changed.
face_data->Duplicate(face.user_face_data);
}
fv_index[0] = fv_data->Duplicate(face.user_face_vertex_data[0]);
fv_index[1] = fv_data->Duplicate(face.user_face_vertex_data[1]);
fv_index[2] = fv_data->Duplicate(face.user_face_vertex_data[2]);
mesh->AddPolygon(face.vertex_index,fv_index,3);
// bit of an unspoken relationship between mesh face buffer
// and the face data which I guess should be changed.
face_data->Duplicate(face.user_face_data);
face_it.Step(face_it.it);
}
// give the user face vertex data over to the mesh.
mesh->SetFaceVertexData(fv_data);
mesh->SetFaceData(face_data);
// that's it
delete[] static_cast<char *>(face.user_face_data);
delete[] static_cast<char *>(face.user_face_vertex_data[0]);
return mesh;
}
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