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/* $Id$ */
/*
libg3d - 3D object loading library
Copyright (C) 2005-2009 Markus Dahms <mad@automagically.de>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <string.h>
#include <g3d/types.h>
#include <g3d/face.h>
#include <g3d/vector.h>
#include "imp_acf_airfoil.h"
G3DObject *acf_wing(G3DMaterial *material, const gchar *name,
G3DFloat *msweep, G3DFloat *mdihed, G3DFloat *mtrans,
G3DFloat *vrt, G3DFloat *vtp,
AcfAirfoil *aflrt, AcfAirfoil *afltp,
G3DFloat wrt, G3DFloat wtp, G3DFloat lf)
{
G3DObject *object;
G3DFace *face;
guint32 nverts;
gint32 i;
G3DFloat vec[3];
nverts = aflrt->vertex_count;
object = g_new0(G3DObject, 1);
object->name = g_strdup(name);
object->vertex_count = nverts * 2;
object->vertex_data = g_new0(G3DFloat, object->vertex_count * 3);
/* vertices */
for(i = 0; i < nverts; i ++) {
/* wing root */
vec[2] = aflrt->vertex_data[i * 2 + 0] * wrt;
vec[1] = aflrt->vertex_data[i * 2 + 1] * wrt;
vec[0] = 0.0;
g3d_vector_transform(vec, vec + 1, vec + 2, mdihed);
g3d_vector_transform(vec, vec + 1, vec + 2, mtrans);
memcpy(object->vertex_data + i * 3, vec, sizeof(vec));
/* wing tip */
vec[2] = afltp->vertex_data[i * 2 + 0] * wtp;
vec[1] = afltp->vertex_data[i * 2 + 1] * wtp;
vec[0] = 0.0;
g3d_vector_transform(vec, vec + 1, vec + 2, mdihed);
g3d_vector_transform(vec, vec + 1, vec + 2, mtrans);
vec[0] += lf * vtp[0];
vec[1] += lf * vtp[1];
vec[2] += lf * vtp[2];
memcpy(object->vertex_data + (i + nverts) * 3, vec, sizeof(vec));
}
/* faces */
for(i = 0; i < (nverts - 1); i ++) {
face = g3d_face_new_tri(material, i + 1, i, i + nverts);
object->faces = g_slist_prepend(object->faces, face);
face = g3d_face_new_tri(material, i + 1, i + nverts + 1, i + nverts);
object->faces = g_slist_prepend(object->faces, face);
}
return object;
}
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