libbubulle/importobj.c

/*
	          LIBBUBULLES

	some functions for importing bubulles from dot-OBJ files.
*/

#include  <stdio.h>
#include  <stdlib.h>
#include  <string.h>

#include  "bubulles.h"

extern int		verbosity;

/* --------------------------------------------------------------------- */

#define LINE_SZ 666
/* --------------------------------------------------------------------- */

typedef struct	{
	char		*token;
	int		id;
	} Tokens;

enum token_id { T_comment=1, T_vertice };

Tokens TokenList[] = {
	{  "#",		T_comment	},
	{  "v",		T_vertice	},
	{  NULL,	0		}
	};

static int type_of_the_line(char *text)
{
Tokens		*token;
int		id;

#if DEBUG_LEVEL
fprintf(stderr, "%s is searching '%s'\n", __func__, text);
#endif

for (token=TokenList; token->token; token++) {
	// fprintf(stderr, "   %5s   ->  %d\n", token->token, token->id);
	if (!strcmp(token->token, text)) {
		return token->id;
		}
	}

return -1;
}
/* --------------------------------------------------------------------- */
static int parse_vertice(char *cptr, float *px, float *py, float *pz)
{
float		x, y, z;
int		foo;

foo = 0;
cptr = strtok(NULL, " ");
foo += sscanf(cptr, "%f", &x);
cptr = strtok(NULL, " ");
foo += sscanf(cptr, "%f", &y);
cptr = strtok(NULL, " ");
foo += sscanf(cptr, "%f", &z);

if (3 == foo) {
	*px = x;	*py = y;	*pz = z;
	}

return foo;
}
/* --------------------------------------------------------------------- */
int try_to_read_an_OBJ_file(char *fname, int notused)
{
FILE		*fpin;
char		line[LINE_SZ+1], *cptr;
float		x, y, z;
int		foo, nbre, tokenid;
BBList          *bublist;
Bubulle         bubulle;

#if DEBUG_LEVEL
fprintf(stderr, ">>> %s ( '%s' %d )\n", __func__, fname, notused);
#endif

if (NULL==(fpin=fopen(fname, "r"))) {
	perror(fname);
	exit(1);
	}

bublist = alloc_bubulles(fname, 1000, 0);
if (NULL==bublist) {
        fprintf(stderr, "err in %s, aborting...\n", __func__);
        abort();
        }
print_bublist_desc(bublist, 0);

nbre = 0;
while(NULL!=(cptr=fgets(line, LINE_SZ, fpin))) {

	if ('\n' != line[strlen(line)-1]) {
		fprintf(stderr, "%s: short read, exiting...\n", __func__);
		return -2;
		}
	line[strlen(line)-1] = '\0';		/* kill the newline */
	if (verbosity>1) fprintf(stderr, "line read ===%s===\n", line);

	cptr = strtok(line, " ");
	if (NULL == cptr) {
		fprintf(stderr, "no token ?\n");
		continue;
		}
	tokenid = type_of_the_line(cptr);
	fprintf(stderr, "tok '%s' --> %d\n", cptr, tokenid);

	memset(&bubulle, 0, sizeof(Bubulle));

	switch (tokenid) {
		case T_comment:
			/* do nothing */
			break;
		case T_vertice:
			foo = parse_vertice(cptr, &x, &y, &z);
			bubulle.p.x = x;
			bubulle.p.y = y;
			bubulle.p.z = z;
			if (verbosity > 1) niceprint_bubulle(&bubulle, 0);
			break;
		default:

			continue;		/* wtf ? */
		}

	foo = push_bubulle(bublist, &bubulle);
	if (foo) {
		fprintf(stderr, "%s: err %d on push\n", __func__, foo);
		break;
		}
	nbre++;
	}
fclose(fpin);

if(verbosity) {
	fprintf(stderr, "%s : %d vertices loaded\n", __func__, nbre);
	}

bubulles_to_data("xyz", NULL, bublist, 0);

return 0;
}

/* --------------------------------------------------------------------- */