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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* parse.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: charles <charles.cabergs@gmail.com> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/05/09 11:02:00 by charles #+# #+# */
/* Updated: 2020/05/11 15:55:44 by charles ### ########.fr */
/* */
/* ************************************************************************** */
#include "scop.h"
#define SCOP_VEC_DEFAULT_SIZE 64
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]);
/* if (ft_vecpush(indices, *(void**)&first) == NULL) */
/* return (-1); */
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));
return (0);
}
static int st_parse_line(char *line, t_ftvec *vertices, t_ftvec *indices)
{
int ret;
char **split;
if (*line != 'v' && *line != 'f')
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')
{
free(line);
return (-1);
}
free(line);
return (0);
}
int parse(char *filepath, t_object *object)
{
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);
object->vertices = (float*)ft_vectobuf32(vertices);
object->indices = (unsigned int*)ft_vectobuf32(indices);
object->vertices_len = vertices->size;
object->indices_len = indices->size;
ft_vecdestroy(vertices, NULL);
ft_vecdestroy(indices, NULL);
return (0);
}
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