star-cad

commit e310174983e35c99f0d39d94b1123e091255c7bb
parent 850dbd9ec9290f7a7cc6607c7e7311dbe9cc8d69
Author: Benjamin Piaud <benjamin.piaud@meso-star.com>
Date:   Tue, 20 Sep 2022 17:42:25 +0200

Add function to explode geometry in list of components

Diffstat:
M
src/scad.h
 | 
8
++++++++
M
src/scad_geometry.c
 | 
73
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

2 files changed, 81 insertions(+), 0 deletions(-)
diff --git a/src/scad.h b/src/scad.h
@@ -297,6 +297,14 @@ scad_geometry_extrude
    const double dxdydz[3],
    struct scad_geometry** out_geometry);
 
+/* Return a list of geometries which form the geometry geom */
+SCAD_API res_T
+scad_geometry_explode
+  (const struct scad_geometry* geom,
+   const char* prefix_name, /* Can be NULL */
+   struct scad_geometry*** out_geometry,
+   size_t* out_geometry_n);
+
 /* Import a step model (`filename'). The imported geometries are recorded in
  * `out_geometry' handler. */
 SCAD_API res_T
diff --git a/src/scad_geometry.c b/src/scad_geometry.c
@@ -996,6 +996,79 @@ error:
 }
 
 res_T
+scad_geometry_explode
+  (const struct scad_geometry* geom,
+   const char* prefix_name, /* Can be NULL */
+   struct scad_geometry*** out_geometry, 
+   size_t* out_geometry_n)
+{
+  res_T res = RES_OK;
+  int* data = NULL;
+  size_t i, sz = 0;
+  struct scad_geometry** geom_array = NULL;
+  struct str name;
+  int name_initialized = 0;
+
+  ERR(check_device(FUNC_NAME));
+  if(get_device()->need_synchro) {
+    ERR(scad_synchronize());
+  }
+
+  if(!geom || !out_geometry || !out_geometry_n) {
+    res = RES_BAD_ARG;
+    goto error;
+  }
+
+  data = geom->gmsh_dimTags;
+  sz = geom->gmsh_dimTags_n;
+
+  ASSERT(sz % 2 == 0);
+  geom_array = malloc(sz/2 * sizeof(*geom_array));
+  if(!geom_array) {
+    res = RES_MEM_ERR;
+    goto error;
+  }
+
+  if (prefix_name) {
+    str_init(get_device()->allocator, &name);
+    name_initialized = 1;
+  }
+  for (i=0; i<sz/2; ++i) {
+    if (prefix_name) {
+      ERR(str_set(&name, prefix_name));
+      ERR(str_append_printf(&name,"_%lu", (unsigned long)i));
+      ERR(scad_geometry_create(str_cget(&name), geom_array+i));
+    } else {
+      ERR(scad_geometry_create(NULL, geom_array+i));
+    }
+    geom_array[i]->gmsh_dimTags_n = 2;
+    geom_array[i]->gmsh_dimTags = malloc(geom_array[i]->gmsh_dimTags_n *
+        sizeof(*geom_array[i]->gmsh_dimTags));
+    if(!geom_array[i]->gmsh_dimTags) {
+      res = RES_MEM_ERR;
+      goto error;
+    }
+    geom_array[i]->gmsh_dimTags[0] = data[2*i];
+    geom_array[i]->gmsh_dimTags[1] = data[2*i+1];
+
+    ERR(device_register_tags(geom_array[i]));
+  }
+    
+exit:
+  if(out_geometry_n) *out_geometry_n = sz/2 ;
+  if(out_geometry) *out_geometry = geom_array;
+  if(name_initialized) str_release(&name);
+  return res;
+error:
+  if(geom_array) {
+    free(geom_array);
+    geom_array = NULL;
+  }
+  goto exit;
+}
+
+
+res_T
 scad_geometry_copy
   (const struct scad_geometry* geom,
    const char* name, /* Can be NULL */