star-cad

commit 455ce14a7685428dbc584f567c22407bc33272c4
parent 60ab2efa18c8c1e4674a7e8a05868c79bf284283
Author: Christophe Coustet <christophe.coustet@meso-star.com>
Date:   Wed, 17 Aug 2022 09:26:15 +0200

Fix a warning

Diffstat:
M
src/scad.c
 | 
7
++++++-

1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/src/scad.c b/src/scad.c
@@ -59,7 +59,7 @@ write_ascii_stl
     size_t j;
     for(j = 0; j < coord_n[i]; j += 9) {
       int k;
-      float n[3];
+      float n[3] = { 0,0,0 }, zero[3] = { 0,0,0 };
       float vtx[3][3];
       float tmp[3], edge1[3], edge2[3];;
       f3_set_d3(vtx[0], coord[i]+j+0);
@@ -68,6 +68,11 @@ write_ascii_stl
       f3_sub(edge1, vtx[1], vtx[0]);
       f3_sub(edge2, vtx[2], vtx[0]);
       f3_cross(tmp, edge1, edge2);
+      if(f3_eq(tmp, zero)) {
+        fprintf(stderr, "Error: nul triangle in exported geometry.\n");
+        res = RES_BAD_ARG;
+        goto error;
+      }
       f3_normalize(n, tmp);
 
       OKP(fprintf(stl_file, "  facet normal %g %g %g\n", SPLIT3(n)));