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/* $Id: imp_dxf.c 256 2008-09-04 12:02:58Z mmmaddd $ */
/*
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 <stdio.h>
#include <string.h>
#include <locale.h>
#include <g3d/types.h>
#include <g3d/stream.h>
#include <g3d/material.h>
#include <g3d/model.h>
#include <g3d/matrix.h>
#include "imp_dxf.h"
#include "imp_dxf_section.h"
#include "imp_dxf_def.h"
static void dxf_cleanup(DxfGlobalData *global);
EAPI
gboolean plugin_load_model_from_stream(G3DContext *context, G3DStream *stream,
G3DModel *model, gpointer user_data)
{
gchar binmagic[22];
G3DObject *object;
G3DMaterial *material;
DxfGlobalData *global;
G3DMatrix rmatrix[16];
global = g_new0(DxfGlobalData, 1);
global->context = context;
global->model = model;
global->stream = stream;
global->blocks = g_hash_table_new(g_str_hash, g_str_equal);
setlocale(LC_NUMERIC, "C");
if((g3d_stream_read(stream, binmagic, 22) == 22) &&
(strncmp(binmagic, "AutoCAD Binary DXF", 18) == 0))
global->binary = TRUE;
else {
setlocale(LC_NUMERIC, "C");
g3d_stream_seek(stream, 0, G_SEEK_SET);
}
object = g_new0(G3DObject, 1);
object->name = g_strdup("DXF Object");
model->objects = g_slist_append(model->objects, object);
material = g3d_material_new();
material->name = g_strdup("default material");
material->flags |= G3D_FLAG_MAT_TWOSIDE;
object->materials = g_slist_append(object->materials, material);
while(!g3d_stream_eof(stream)) {
int retval = dxf_read_section(global, object);
if(retval != TRUE) {
if(retval == 0xE0F) {
g3d_matrix_identity(rmatrix);
g3d_matrix_rotate_xyz(G_PI * -90.0 / 180, 0.0, 0.0, rmatrix);
g3d_model_transform(model, rmatrix);
dxf_cleanup(global);
return TRUE;
}
g_printerr("error in section..\n");
dxf_cleanup(global);
return FALSE;
}
}
g3d_matrix_identity(rmatrix);
g3d_matrix_rotate_xyz(G_PI * -90.0 / 180, 0.0, 0.0, rmatrix);
g3d_model_transform(model, rmatrix);
dxf_cleanup(global);
return TRUE;
}
EAPI
gchar *plugin_description(void)
{
return g_strdup("AutoCAD models.");
}
EAPI
gchar **plugin_extensions(void)
{
return g_strsplit("dxf", ":", 0);
}
/*****************************************************************************/
static void dxf_cleanup(DxfGlobalData *global)
{
g_hash_table_destroy(global->blocks);
g_free(global);
}
gboolean dxf_read_section(DxfGlobalData *global, G3DObject *object)
{
gint grpcode;
gchar val_str[DXF_MAX_LINE + 1];
grpcode = dxf_read_code(global);
if(grpcode != 0) {
#if DEBUG > 0
g_printerr("unexpected group code: %d (0 expected)\n", grpcode);
#endif
return FALSE;
}
dxf_read_string(global, val_str);
if(strcmp("EOF", val_str) == 0)
return 0xE0F;
if(strcmp("SECTION", val_str) != 0) {
#if DEBUG > 0
g_printerr("SECTION expected, found: %s\n", val_str);
#endif
return FALSE;
}
grpcode = dxf_read_code(global);
if(grpcode != 2) {
#if DEBUG > 0
g_printerr("unexpected group code: %d (2 expected)\n", grpcode);
#endif
return FALSE;
}
dxf_read_string(global, val_str);
if(strcmp(val_str, "HEADER") == 0)
return dxf_section_HEADER(global);
else if(strcmp(val_str, "TABLES") == 0)
return dxf_section_TABLES(global);
else if(strcmp(val_str, "ENTITIES") == 0)
return dxf_section_ENTITIES(global);
else if(strcmp(val_str, "BLOCKS") == 0)
return dxf_section_BLOCKS(global);
else if(strcmp(val_str, "OBJECTS") == 0)
return dxf_section_OBJECTS(global);
else if(strcmp(val_str, "CLASSES") == 0)
return dxf_section_CLASSES(global);
else {
#if DEBUG > 0
g_printerr("unknown section '%s', skipping...\n", val_str);
#endif
dxf_skip_section(global);
}
return TRUE;
}
gchar *dxf_read_string(DxfGlobalData *global, gchar *value)
{
if(global->binary) {
int pos = 0;
int c;
do
{
c = g3d_stream_read_int8(global->stream);
value[pos] = (char)c;
pos++;
} while(c != '\0');
return value;
} else {
gchar line[DXF_MAX_LINE + 1];
g3d_stream_read_line(global->stream, line, DXF_MAX_LINE);
line[DXF_MAX_LINE] = '\0';
if(sscanf(line, "%s", value) == 1)
return g_strchomp(value);
if(sscanf(line, " %s", value) == 1)
return g_strchomp(value);
return NULL;
}
}
gint32 dxf_read_code(DxfGlobalData *global)
{
gint32 val = DXF_CODE_INVALID;
gchar line[DXF_MAX_LINE + 1];
if(global->binary)
return g3d_stream_read_int8(global->stream);
else {
g3d_stream_read_line(global->stream, line, DXF_MAX_LINE);
if((sscanf(line, "%d", &val) != 1) &&
(sscanf(line, " %d", &val) != 1))
return DXF_CODE_INVALID;
if(val == 999) { /* comment */
g3d_stream_read_line(global->stream, line, DXF_MAX_LINE);
return dxf_read_code(global);
}
return val;
}
}
gint32 dxf_read_int16(DxfGlobalData *global)
{
if(global->binary)
return g3d_stream_read_int16_le(global->stream);
else
{
gint32 val;
gchar line[DXF_MAX_LINE];
g3d_stream_read_line(global->stream, line, DXF_MAX_LINE);
if(sscanf(line, "%i", &val) == 1)
return val;
if(sscanf(line, " %i", &val) == 1)
return val;
else
return DXF_CODE_INVALID;
}
}
gint32 dxf_read_int32(DxfGlobalData *global)
{
if(global->binary)
return g3d_stream_read_int32_le(global->stream);
else
{
gint32 val;
gchar line[DXF_MAX_LINE];
g3d_stream_read_line(global->stream, line, DXF_MAX_LINE);
if(sscanf(line, "%i", &val) == 1)
return val;
if(sscanf(line, " %i", &val) == 1)
return val;
else
return DXF_CODE_INVALID;
}
}
gdouble dxf_read_float64(DxfGlobalData *global)
{
if(global->binary)
return g3d_stream_read_double_le(global->stream);
else
{
gdouble val;
gchar line[DXF_MAX_LINE];
g3d_stream_read_line(global->stream, line, DXF_MAX_LINE);
if(sscanf(line, "%lf", &val) == 1)
return val;
if(sscanf(line, " %lf", &val) == 1)
return val;
else
return 0.0;
}
}
gboolean dxf_skip_section(DxfGlobalData *global)
{
gchar c, buf[7], line[DXF_MAX_LINE];
gsize read;
while(!g3d_stream_eof(global->stream))
if(global->binary) {
do { c = g3d_stream_read_int8(global->stream); } while(c != 0);
read = g3d_stream_read(global->stream, buf, 7);
if((read == 7) && (strncmp(buf, "ENDSEC", 6) == 0))
return TRUE;
else
g3d_stream_seek(global->stream, -read, G_SEEK_CUR);
} else {
g3d_stream_read_line(global->stream, line, DXF_MAX_LINE);
if(strncmp(line, "ENDSEC", 6) == 0)
return TRUE;
}
return TRUE;
}
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