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/*
* COPYRIGHT
*
* pcb-rnd, interactive printed circuit board design
* Copyright (C) 2020 Tibor 'Igor2' Palinkas
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Contact:
* Project page: http://repo.hu/projects/pcb-rnd
* lead developer: http://repo.hu/projects/pcb-rnd/contact.html
* mailing list: pcb-rnd (at) list.repo.hu (send "subscribe")
*/
static stl_facet_t *stl_solid_fload(rnd_design_t *hl, FILE *f, const char *fn)
{
stl_facet_t *head = NULL, *tail = NULL, *t;
char *cmd, line[512];
/* find the 'solid' header */
cmd = stl_getline(line, sizeof(line), f);
if ((cmd == NULL) || (strncmp(cmd, "solid", 5) != 0)) {
rnd_message(RND_MSG_ERROR, "Invalid stl file %s: first line is not a 'solid'\n", fn);
return NULL;
}
for(;;) {
int n;
cmd = stl_getline(line, sizeof(line), f);
if (cmd == NULL) {
rnd_message(RND_MSG_ERROR, "Invalid stl file %s: premature end of file in solid\n", fn);
goto error;
}
if (strncmp(cmd, "endsolid", 8) == 0)
break; /* normal end of file */
if (strncmp(cmd, "facet normal", 12) != 0) {
rnd_message(RND_MSG_ERROR, "Invalid stl file %s: expected facet, got %s\n", fn, cmd);
goto error;
}
t = malloc(sizeof(stl_facet_t));
t->next = NULL;
if (tail != NULL) {
tail->next = t;
tail = t;
}
else
head = tail = t;
cmd += 12;
if (sscanf(cmd, "%lf %lf %lf", &t->n[0], &t->n[1], &t->n[2]) != 3) {
rnd_message(RND_MSG_ERROR, "Invalid stl file %s: wrong facet normals '%s'\n", fn, cmd);
goto error;
}
cmd = stl_getline(line, sizeof(line), f);
if (strncmp(cmd, "outer loop", 10) != 0) {
rnd_message(RND_MSG_ERROR, "Invalid stl file %s: expected outer loop, got %s\n", fn, cmd);
goto error;
}
for(n = 0; n < 3; n++) {
cmd = stl_getline(line, sizeof(line), f);
if (strncmp(cmd, "vertex", 6) != 0) {
rnd_message(RND_MSG_ERROR, "Invalid stl file %s: expected vertex, got %s\n", fn, cmd);
goto error;
}
cmd+=6;
if (sscanf(cmd, "%lf %lf %lf", &t->vx[n], &t->vy[n], &t->vz[n]) != 3) {
rnd_message(RND_MSG_ERROR, "Invalid stl file: %s wrong facet vertex '%s'\n", fn, cmd);
goto error;
}
}
cmd = stl_getline(line, sizeof(line), f);
if (strncmp(cmd, "endloop", 7) != 0) {
rnd_message(RND_MSG_ERROR, "Invalid stl file %s: expected endloop, got %s\n", fn, cmd);
goto error;
}
cmd = stl_getline(line, sizeof(line), f);
if (strncmp(cmd, "endfacet", 8) != 0) {
rnd_message(RND_MSG_ERROR, "Invalid stl file %s: expected endfacet, got %s\n", fn, cmd);
goto error;
}
}
return head;
error:;
stl_solid_free(head);
fclose(f);
return NULL;
}
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