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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
*/
/*
* imp_lwo.c - LightWave import plugin
*
* (C) 2005,2006 Markus Dahms
*
* based on gtkglarea example viewlw:
* Copyright (C) 1998 Janne Löf <jlof@mail.student.oulu.fi>
*/
#include <string.h>
#include <g3d/types.h>
#include <g3d/context.h>
#include <g3d/stream.h>
#include <g3d/material.h>
#include <g3d/iff.h>
#define LW_MAX_POINTS 200
#define LW_MAX_NAME_LEN 500
#define LW_F_LWO2 1
#include "imp_lwo.h"
#include "imp_lwo_chunks.h"
/*****************************************************************************/
/* plugin interface */
/*****************************************************************************/
static void lwo_fix_texfaces(G3DModel *model);
EAPI
gboolean plugin_load_model_from_stream(G3DContext *context, G3DStream *stream,
G3DModel *model, gpointer user_data)
{
LwoObject *obj;
G3DMaterial *material;
guint32 id;
gsize len;
G3DIffGlobal *global;
G3DIffLocal *local;
if(!g3d_iff_check(stream, &id, &len))
return FALSE;
if((id != G3D_IFF_MKID('L','W','O','B')) &&
(id != G3D_IFF_MKID('L','W','O','2'))) {
g_warning("'%s' is not a LightWave object", stream->uri);
return FALSE;
}
obj = g_new0(LwoObject, 1);
global = g_new0(G3DIffGlobal, 1);
global->stream = stream;
global->context = context;
global->model = model;
if(id == G3D_IFF_MKID('L','W','O','2'))
global->flags |= LWO_FLAG_LWO2;
global->user_data = obj;
local = g_new0(G3DIffLocal, 1);
local->id = id;
local->nb = len;
material = g3d_material_new();
material->name = g_strdup("fallback material");
model->materials = g_slist_append(model->materials, material);
g3d_iff_read_ctnr(global, local, lwo_chunks,
G3D_IFF_PAD2 | G3D_IFF_SUBCHUNK_LEN16);
lwo_fix_texfaces(model);
/* cleanup */
if(obj->ntags)
g_strfreev(obj->tags);
if(obj->nclips)
{
g_free(obj->clips);
g_strfreev(obj->clipfiles);
}
if(obj->tex_vertices)
g_free(obj->tex_vertices);
g_free(obj);
g_free(local);
g_free(global);
g3d_context_update_progress_bar(context, 0.0, FALSE);
return TRUE;
}
EAPI
gchar *plugin_description(G3DContext *context)
{
return g_strdup("LightWave models.\n"
"Author: Markus Dahms.");
}
EAPI
gchar **plugin_extensions(G3DContext *context)
{
return g_strsplit("lwo:lwb:lw", ":", 0);
}
/*****************************************************************************/
/* private */
/*****************************************************************************/
G3DObject *lwo_create_object(G3DStream *stream, G3DModel *model, guint32 flags)
{
G3DObject *object = g_new0(G3DObject, 1);
object->name = g_strdup_printf("LWO%c object @ 0x%08x",
(flags & LW_F_LWO2) ? '2' : 'B', (guint32)g3d_stream_tell(stream) - 8);
model->objects = g_slist_append(model->objects, object);
#if 0
/* LWO files should have correct faces */
model->glflags &= ~G3D_FLAG_GL_ALLTWOSIDE;
#endif
return object;
}
/*****************************************************************************/
/* LWO specific */
/*****************************************************************************/
gint lwo_read_string(G3DStream *stream, char *s)
{
gint c;
gint cnt = 0;
do {
c = g3d_stream_read_int8(stream);
if (cnt < LW_MAX_NAME_LEN)
s[cnt] = c;
else
s[LW_MAX_NAME_LEN-1] = 0;
cnt++;
} while (c != 0);
/* if length of string (including \0) is odd skip another byte */
if (cnt%2) {
g3d_stream_read_int8(stream);
cnt++;
}
return cnt;
}
guint32 lwo_read_vx(G3DStream *stream, guint *index)
{
*index = g3d_stream_read_int16_be(stream);
if((*index & 0xFF00) == 0xFF00) {
*index <<= 16;
*index += g3d_stream_read_int16_be(stream);
*index &= 0x00FFFFFF;
return 4;
} else {
return 2;
}
}
static void lwo_fix_texfaces(G3DModel *model)
{
GSList *olist, *flist;
G3DObject *object;
G3DFace *face;
olist = model->objects;
while(olist)
{
object = (G3DObject *)olist->data;
olist = olist->next;
flist = object->faces;
while(flist)
{
face = (G3DFace *)flist->data;
flist = flist->next;
if(face->flags & G3D_FLAG_FAC_TEXMAP)
{
face->tex_image = face->material->tex_image;
if(face->tex_image == NULL)
{
face->flags &= ~G3D_FLAG_FAC_TEXMAP;
}
}
}
}
}
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