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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* parse.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: charles <charles.cabergs@gmail.com> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/05/09 11:02:00 by charles #+# #+# */
/* Updated: 2020/05/14 14:01:26 by charles ### ########.fr */
/* */
/* ************************************************************************** */
#include "scop.h"
#define SCOP_VEC_DEFAULT_SIZE 2048
static void *st_iter_func_decrement_uint(void *void_uint)
{
unsigned int uint;
uint = *(unsigned int*)&void_uint;
uint--;
return (*(void**)&uint);
}
static int st_parse_face(char **indexes_strs, t_ftvec *indices)
{
size_t i;
size_t len;
unsigned int first;
unsigned int tmp;
len = ft_strslen(indexes_strs);
first = ft_atoi(indexes_strs[0]);
i = 1;
while (i < len - 1)
{
if (ft_vecpush(indices, *(void**)&first) == NULL)
return (-1);
tmp = ft_atoi(indexes_strs[i]);
if (ft_vecpush(indices, *(void**)&tmp) == NULL)
return (-1);
tmp = ft_atoi(indexes_strs[i + 1]);
if (ft_vecpush(indices, *(void**)&tmp) == NULL)
return (-1);
i++;
}
return (0);
}
static int st_parse_vertex(char **positions_strs, t_ftvec *vertices)
{
float tmp;
tmp = ft_atof(positions_strs[0]);
ft_vecpush(vertices, *((void**)&tmp));
tmp = ft_atof(positions_strs[1]);
ft_vecpush(vertices, *((void**)&tmp));
tmp = ft_atof(positions_strs[2]);
ft_vecpush(vertices, *((void**)&tmp));
if (positions_strs[3] != NULL)
{
tmp = ft_atof(positions_strs[3]);
ft_vecpush(vertices, *((void**)&tmp));
}
else
{
tmp = 1.0f;
ft_vecpush(vertices, *((void**)&tmp));
}
return (0);
}
/* static int st_parse_texture_coord(char **coord_strs, t_ftvec *coords) */
/* { */
/* float tmp; */
/* */
/* tmp = ft_atof(coord_strs[0]); */
/* ft_vecpush(coords, *((void**)&tmp)); */
/* if (coord_strs[1] != NULL) */
/* { */
/* tmp = ft_atof(coord_strs[1]); */
/* ft_vecpush(coords, *((void**)&tmp)); */
/* } */
/* else */
/* { */
/* tmp = 0.0f; */
/* ft_vecpush(coords, *((void**)&tmp)); */
/* } */
/* if (ft_strslen(coord_strs) == 3) */
/* { */
/* tmp = ft_atof(coord_strs[2]); */
/* ft_vecpush(coords, *((void**)&tmp)); */
/* } */
/* else */
/* { */
/* tmp = 0.0f; */
/* ft_vecpush(coords, *((void**)&tmp)); */
/* } */
/* return (0); */
/* } */
static int st_parse_line(char *line, t_ftvec *vertices, t_ftvec *indices)
{
int ret;
char **split;
if (!ft_strnequ(line, "v ", 2) && !ft_strnequ(line, "f ", 2))
return (0);
if ((split = ft_split(line + 1, ' ')) == NULL)
return (-1);
ret = -1;
if (*line == 'v' && ft_strslen(split) == 3)
ret = st_parse_vertex(split, vertices);
if (*line == 'f' && ft_strslen(split) >= 3)
ret = st_parse_face(split, indices);
ft_strsdestroy(split);
return (ret);
}
static int st_parse_file(int fd, t_ftvec *vertices, t_ftvec *indices)
{
char *line;
int ret;
while ((ret = ft_getline(fd, &line)) == FT_LINE)
{
ret = st_parse_line(line, vertices, indices);
free(line);
if (ret == -1)
break ;
}
if (ret == FT_ERROR)
return (-1);
if (*line != '\0')
ret = -1;
free(line);
return (0);
}
int parse(char *filepath, t_model_data *data)
{
int fd;
t_ftvec *vertices;
t_ftvec *indices;
if (!has_extension(filepath, ".obj")
|| (fd = open(filepath, O_RDONLY)) == -1)
return (-1);
if ((vertices = ft_vecnew(SCOP_VEC_DEFAULT_SIZE)) == NULL)
return (-1);
if ((indices = ft_vecnew(SCOP_VEC_DEFAULT_SIZE)) == NULL)
return (-1);
st_parse_file(fd, vertices, indices);
ft_veciter_ret(indices, st_iter_func_decrement_uint);
data->vertices = (float*)ft_vectobuf32(vertices);
data->indices = (unsigned int*)ft_vectobuf32(indices);
data->vertices_size = vertices->size;
data->indices_size = indices->size;
ft_vecdestroy(vertices, NULL);
ft_vecdestroy(indices, NULL);
return (0);
}
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