star-cad

commit 09ec4ad14fbf5b839fc926861f1031d36f9c73fd
parent b65503263992200c9cee46cf2767b5c8dd4a7431
Author: Christophe Coustet <christophe.coustet@meso-star.com>
Date:   Wed, 15 Jan 2025 16:30:57 +0100

Add the scad_geometry_get_bounding_box API call

Diffstat:
M
src/scad.h
 | 
7
+++++++
M
src/scad_geometry.c
 | 
38
++++++++++++++++++++++++++++++++++++++

2 files changed, 45 insertions(+), 0 deletions(-)
diff --git a/src/scad.h b/src/scad.h
@@ -260,6 +260,13 @@ scad_geometry_get_closest_point
    double* closest,
    double* closest_distance);
 
+/* Get the Boundig Box of geometry `geom' */
+SCAD_API res_T
+scad_geometry_get_bounding_box
+  (struct scad_geometry* geom,
+   double min[3],
+   double max[3]);
+
 /* Add a rectangle to the scene, defined by a point `xyz' and
  * `dxdy' the extents along the x-, y-axes. */
 SCAD_API res_T
diff --git a/src/scad_geometry.c b/src/scad_geometry.c
@@ -816,6 +816,44 @@ error:
 }
 
 res_T
+scad_geometry_get_bounding_box
+  (struct scad_geometry* geom,
+   double min[3],
+   double max[3])
+{
+  res_T res = RES_OK;
+  size_t n = 0;
+  double mi[3], ma[3];
+
+  if(!geom || !min || !max) {
+    res = RES_BAD_ARG;
+    goto error;
+  }
+
+  ERR(check_device(FUNC_NAME));
+
+  d3_splat(mi, DBL_MAX);
+  d3_splat(ma, -DBL_MAX);
+  for(n = 0; n < geom->gmsh_dimTags_n; n += 2) {
+    double i[3], a[3];
+    int ierr = 0;
+    int dim = geom->gmsh_dimTags[n];
+    int tag = geom->gmsh_dimTags[n + 1];
+    gmshModelOccGetBoundingBox(dim, tag, i, i+1, i+2, a, a+1, a+2, &ierr);
+    ERR(gmsh_err_to_res_T(ierr));
+    d3_min(mi, mi, i);
+    d3_max(ma, ma, a);
+  }
+  d3_set(min, mi);
+  d3_set(max, ma);
+
+exit:
+  return res;
+error:
+  goto exit;
+}
+
+res_T
 scad_add_rectangle
   (const char* name,
    const double xyz[3],