star-cad

commit 198cbf15723531c46eceb81e8b66a4e913cb12b7
parent 2580f7a37551a32d2de624b989b01c55c5b28782
Author: Christophe Coustet <christophe.coustet@meso-star.com>
Date:   Fri, 20 Dec 2024 11:22:47 +0100

Add an API call to select a specific mesh algorithm for some geometries

Diffstat:
M
src/scad.h
 | 
9
+++++++++
M
src/scad_geometry.c
 | 
36
++++++++++++++++++++++++++++++++++++

2 files changed, 45 insertions(+), 0 deletions(-)
diff --git a/src/scad.h b/src/scad.h
@@ -593,6 +593,15 @@ scad_geometries_set_mesh_size_modifier
    enum scad_size_modifier_type type,
    double modifier);
 
+/* Set a specific mesh algorithm for geometries in `geometries'.
+ * Only apply to surfaces (dimension 2). If called on a volume, it applies to
+ * its 2D constituents. */
+SCAD_API res_T
+scad_geometries_set_mesh_algorithm
+  (struct scad_geometry** geometries,
+   const size_t geometries_count,
+   enum scad_mesh_algorithm algorithm);
+
 /* Clear the mesh of the geometries in `geometries'.
  * Note that the mesh of a geometry can only be cleared if it is not on the
  * boundary of another geometry with a non-empty mesh. */
diff --git a/src/scad_geometry.c b/src/scad_geometry.c
@@ -2809,6 +2809,42 @@ error:
 }
 
 res_T
+scad_geometries_set_mesh_algorithm
+(struct scad_geometry** geometries,
+   const size_t geometries_count,
+   enum scad_mesh_algorithm algorithm)
+{
+  res_T res = RES_OK;
+  struct scad_device* dev = get_device();
+  int ierr;
+  int* tagout[4] = { NULL, NULL, NULL, NULL };
+  size_t tagoutn[4], i;
+
+  if(!geometries || geometries_count == 0) {
+    res = RES_BAD_ARG;
+    goto error;
+  }
+
+  ERR(check_device(FUNC_NAME));
+
+  ERR(gather_tags_recursive(geometries, geometries_count, 2, tagout, tagoutn));
+  for(i = 0; i < tagoutn[2]; i += 2) {
+    int dim = tagout[2][i];
+    int tag = tagout[2][i+1];
+    gmshModelMeshSetAlgorithm(dim, tag, (int)algorithm, &ierr);
+    ERR(gmsh_err_to_res_T(ierr));
+  }
+
+exit:
+  for(i = 2; i < 4; i++) {
+    MEM_RM(dev->allocator, tagout[i]);
+  }
+  return res;
+error:
+  goto exit;
+}
+
+res_T
 scad_geometries_set_periodic
   (struct scad_geometry** source,
    const size_t source_count,