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#include "evas_model_load_save_common.h"
static unsigned short*
_init_obj_indices_data(Evas_Model_Load_Save_Header header)
{
unsigned short *i_data;
int i = 0;
if (header.existence_of_positions) i++;
if (header.existence_of_normals) i++;
if (header.existence_of_tex_coords) i++;
i_data = calloc(header.vertices_count * i, sizeof(unsigned short));
return i_data;
}
static void
_vertex_data_free_cb(void *data)
{
eina_stringshare_del(data);
}
static void
_write_point(FILE *obj_file,
int num,
int num_of_point,
Evas_Model_Load_Save_Header header,
unsigned short *i_data)
{
if (num_of_point == 0)
fprintf(obj_file, "f ");
if (header.existence_of_normals)
{
if (header.existence_of_tex_coords)
fprintf(obj_file, "%hu/%hu/%hu ", i_data[num],
i_data[num + header.vertices_count],
i_data[num + 2 * header.vertices_count]);
else
fprintf(obj_file, "%hu//%hu ", i_data[num],
i_data[num + header.vertices_count]);
}
else
{
if (header.existence_of_tex_coords)
fprintf(obj_file, "%hu/%hu ", i_data[num],
i_data[num + header.vertices_count]);
else
fprintf(obj_file, "%hu ", i_data[num]);
}
if (num_of_point == 2)
fprintf(obj_file, "\n");
}
static inline Eina_Bool
_write_obj_header(FILE *file,
const char *_mtl_file_name)
{
time_t current_time;
char* c_time_string;
current_time = time(NULL);
if (current_time == ((time_t)-1))
{
ERR("Failure to compute the current time.");
return EINA_FALSE;
}
c_time_string = ctime(¤t_time);
if (c_time_string == NULL)
{
ERR("Failure to convert the current time.");
return EINA_FALSE;
}
fprintf(file, "# Evas_Canvas3D saver OBJ v0.03 \n");
fprintf(file, "# Current time is %s \n", c_time_string);
fprintf(file, "mtllib %s \n\n", _mtl_file_name);
return EINA_TRUE;
}
static inline void
_write_obj_vertex_data(FILE *file,
Evas_Model_Load_Save_Header header,
Evas_Model_Load_Save_Data data,
unsigned short *i_data)
{
int i, j;
int v = -1;
Eina_Stringshare *str, *cur_str, *cur_index;
unsigned short cur_hu;
Eina_Hash *vb;
#define WRITE_OBJ_VERTEX_DATA(name, num, format) \
if (header.existence_of_##name) \
{ \
cur_hu = 0; \
v++; \
vb = eina_hash_string_superfast_new(_vertex_data_free_cb); \
for (i = 0; i < header.vertices_count; i++) \
{ \
str = eina_stringshare_printf(" "); \
for (j = 0; j < num; j++) \
str = eina_stringshare_printf("%s %f", str, \
data.name[i * num + j]); \
cur_index = eina_hash_find(vb, str); \
if (!cur_index) \
{ \
cur_hu++; \
cur_str = eina_stringshare_printf("%hu", cur_hu); \
eina_hash_add(vb, str, cur_str); \
i_data[v * header.vertices_count + i] = cur_hu; \
fprintf(file, "%s%s\n", format, str); \
} \
else sscanf(cur_index, "%hu", \
i_data + v * header.vertices_count + i); \
} \
eina_hash_free(vb); \
}
WRITE_OBJ_VERTEX_DATA(positions, 3, "v")
WRITE_OBJ_VERTEX_DATA(tex_coords, 2, "vt")
WRITE_OBJ_VERTEX_DATA(normals, 3, "vn")
#undef WRITE_OBJ_VERTEX_DATA
}
static inline void
_write_obj_index_data(FILE *file,
Evas_Model_Load_Save_Header header,
Evas_Model_Load_Save_Data data,
unsigned short *i_data)
{
int i;
int ic;
ic = header.indices_count ? header.indices_count : header.vertices_count;
for (i = 0; i < ic; i++)
_write_point(file, data.indices[i], i % 3, header, i_data);
}
static void
_save_mesh(Evas_Canvas3D_Mesh_Data *pd,
const char *_obj_file_name,
const char *_mtl_file_name,
Evas_Canvas3D_Mesh_Frame *f)
{
Evas_Model_Load_Save_Header header;
Evas_Model_Load_Save_Data data;
unsigned short *index_data;
if (!evas_model_save_header_from_mesh(pd, f, &header)) return;
index_data = _init_obj_indices_data(header);
if (index_data == NULL)
{
ERR("Allocation of index data is failed.");
return;
}
evas_model_save_data_from_mesh(pd, f, header, &data);
FILE * _obj_file = fopen(_obj_file_name, "w+");
if (!_obj_file)
{
ERR("File open '%s' for save failed", _obj_file_name);
free(index_data);
return;
}
if (!_write_obj_header(_obj_file, _mtl_file_name))
{
fclose(_obj_file);
free(index_data);
return;
}
_write_obj_vertex_data(_obj_file, header, data, index_data);
fprintf(_obj_file,"usemtl Material\n s off\n");
_write_obj_index_data(_obj_file, header, data, index_data);
fclose(_obj_file);
free(index_data);
free(data.indices);
}
static void
_save_material(Evas_Canvas3D_Mesh_Data *pd EINA_UNUSED,
const char *_mtl_file_name,
Evas_Canvas3D_Material_Data *mat)
{
FILE * _mtl_file = fopen(_mtl_file_name, "w+");
if (!_mtl_file)
{
ERR("File open '%s' for save failed", _mtl_file_name);
return;
}
fprintf(_mtl_file, "# Evas_Canvas3D saver OBJ v0.03 \n");//_mtl_file created in macro
fprintf(_mtl_file, "# Material Count: 1 \n\n");
fprintf(_mtl_file, "newmtl Material \n");
fprintf(_mtl_file, "Ns 1.000000 \n");//exp factor for specular highlight
fprintf(_mtl_file, "Ka %.6f %.6f %.6f \n",
(float)mat->attribs[EVAS_CANVAS3D_MATERIAL_ATTRIB_AMBIENT].color.r,
(float)mat->attribs[EVAS_CANVAS3D_MATERIAL_ATTRIB_AMBIENT].color.g,
(float)mat->attribs[EVAS_CANVAS3D_MATERIAL_ATTRIB_AMBIENT].color.b);
fprintf(_mtl_file, "Kd %.6f %.6f %.6f \n",
(float)mat->attribs[EVAS_CANVAS3D_MATERIAL_ATTRIB_DIFFUSE].color.r,
(float)mat->attribs[EVAS_CANVAS3D_MATERIAL_ATTRIB_DIFFUSE].color.g,
(float)mat->attribs[EVAS_CANVAS3D_MATERIAL_ATTRIB_DIFFUSE].color.b);
fprintf(_mtl_file, "Ks %.6f %.6f %.6f \n",
(float)mat->attribs[EVAS_CANVAS3D_MATERIAL_ATTRIB_SPECULAR].color.r,
(float)mat->attribs[EVAS_CANVAS3D_MATERIAL_ATTRIB_SPECULAR].color.g,
(float)mat->attribs[EVAS_CANVAS3D_MATERIAL_ATTRIB_SPECULAR].color.b);
fprintf(_mtl_file, "Ni 1.000000 \n");//optical density
fprintf(_mtl_file, "d 1.000000 \n");//a factor d of 1.0 is fully opaque material
fprintf(_mtl_file, "illum 2 \n");//illumination properties
fclose(_mtl_file);
}
void
evas_model_save_file_obj(const Evas_Canvas3D_Mesh *mesh,
const char *_obj_file_name,
Evas_Canvas3D_Mesh_Frame *f)
{
int len;
char *_mtl_file_name, *_without_extention;
Evas_Canvas3D_Material_Data *mat;
len = strlen(_obj_file_name);
_without_extention = (char *)malloc(len - 3);
_mtl_file_name = (char *)malloc(len + 1);
eina_strlcpy(_without_extention, _obj_file_name, len - 3);
eina_str_join(_mtl_file_name, len + 1, '.', _without_extention, "mtl");
free(_without_extention);
Evas_Canvas3D_Mesh_Data *pd = eo_data_scope_get(mesh, EVAS_CANVAS3D_MESH_CLASS);
mat = eo_data_scope_get(f->material, EVAS_CANVAS3D_MATERIAL_CLASS);
if (mat != NULL) _save_material(pd, _mtl_file_name, mat);
_save_mesh(pd, _obj_file_name, _mtl_file_name, f);
free(_mtl_file_name);
}
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