star-enclosures-3d

commit 1db74b6f5d469c3ac5f4020b5ded37637c1fe393
parent 1abafd3f299066e521a7e141c5e97bc0a6a2c0e1
Author: Christophe Coustet <christophe.coustet@meso-star.com>
Date:   Fri,  5 Jul 2024 15:18:41 +0200

Add an API function to dump an enclosure to an OBJ file

The main use could be debugging

Diffstat:
M
src/senc3d.h
 | 
7
+++++++
M
src/senc3d_scene.c
 | 
52
++++++++++++++++++++++++++++++++++++++++++++++++++++

2 files changed, 59 insertions(+), 0 deletions(-)
diff --git a/src/senc3d.h b/src/senc3d.h
@@ -333,6 +333,13 @@ senc3d_scene_get_overlapping_triangle
    const unsigned idx,
    unsigned* id);
 
+/* Dump a given enclosure in an OBJ file */
+SENC3D_API res_T
+senc3d_scene_dump_enclosure_obj
+  (struct senc3d_scene* scn,
+   const unsigned enc,
+   const char* filename);
+
 SENC3D_API res_T
 senc3d_scene_ref_get
   (struct senc3d_scene* scene);
diff --git a/src/senc3d_scene.c b/src/senc3d_scene.c
@@ -319,6 +319,58 @@ senc3d_scene_get_vertex
 }
 
 res_T
+senc3d_scene_dump_enclosure_obj
+  (struct senc3d_scene* scn,
+   const unsigned enc,
+   const char* name)
+{
+  struct senc3d_enclosure* enclosure = NULL;
+  struct senc3d_enclosure_header header;
+  FILE* stream = NULL;
+  unsigned count, i;
+  res_T res = RES_OK;
+
+  if(!scn || !name) {
+    res = RES_BAD_ARG;
+    goto error;
+  }
+
+  OK(senc3d_scene_get_enclosure_count(scn, &count));
+  if(enc >= count) {
+    res = RES_BAD_ARG;
+    goto error;
+  }
+
+  OK(senc3d_scene_get_enclosure(scn, enc, &enclosure));
+  OK(senc3d_enclosure_get_header(enclosure, &header));
+
+  stream = fopen(name, "w");
+  if(!stream) {
+    res = RES_BAD_ARG;
+    goto error;
+  }
+
+  FOR_EACH(i, 0, header.vertices_count) {
+    double tmp[3];
+    OK(senc3d_enclosure_get_vertex(enclosure, i, tmp));
+    fprintf(stream, "v %g %g %g\n", SPLIT3(tmp));
+  }
+  FOR_EACH(i, 0, header.primitives_count) {
+    unsigned indices[3];
+    OK(senc3d_enclosure_get_triangle(enclosure, i, indices));
+    fprintf(stream, "f %u %u %u\n",
+      1+indices[0], 1+indices[1], 1+indices[2]);
+  }
+
+exit:
+  if(enclosure) SENC3D(enclosure_ref_put(enclosure));
+  if(stream) fclose(stream);
+  return res;
+error:
+  goto exit;
+}
+
+res_T
 senc3d_scene_ref_get(struct senc3d_scene* scn)
 {
   if(!scn) return RES_BAD_ARG;