star-cpr

commit a2f0631a4f1bafa4325a51c7237edf74f623b1a3
parent 94b664272dee377ce0081f9e22109e074b4401da
Author: Christophe Coustet <christophe.coustet@meso-star.com>
Date:   Wed, 26 Apr 2023 17:20:35 +0200

Add a point-in-component feature

Diffstat:
M
src/scpr.h
 | 
10
+++++++++-
M
src/scpr_polygon.c
 | 
38
++++++++++++++++++++++++++++++++++++++

2 files changed, 47 insertions(+), 1 deletion(-)
diff --git a/src/scpr.h b/src/scpr.h
@@ -239,6 +239,13 @@ scpr_polygon_eq
    int* is_eq);
 
 SCPR_API res_T
+scpr_point_in_component
+  (const struct scpr_polygon* polygon,
+   const size_t icomponent,
+   const double point[2],
+   int* situation); /* +1: inside, 0: on, -1: outside */
+
+SCPR_API res_T
 scpr_polygon_dump_to_obj
   (struct scpr_polygon* polygon,
    FILE* stream);
@@ -322,12 +329,13 @@ SCPR_API res_T
 scpr_intersector_ref_put
   (struct scpr_intersector* intersector);
 
-/* Register a polygon's a polygon or a component for further analysis */
+/* Register a polygon for further analysis */
 SCPR_API res_T
 scpr_intersector_register_polygon
   (struct scpr_intersector* intersector,
    struct scpr_polygon* polygon);
 
+/* Register a polygon's component for further analysis */
 SCPR_API res_T
 scpr_intersector_register_component
   (struct scpr_intersector* intersector,
diff --git a/src/scpr_polygon.c b/src/scpr_polygon.c
@@ -506,6 +506,44 @@ error:
 }
 
 res_T
+scpr_point_in_component
+  (const struct scpr_polygon* polygon,
+   const size_t icomponent,
+   const double point[2],
+   int* situation)
+{
+  res_T res = RES_OK;
+  int64_t tmp64[2];
+  Clipper2Lib::Point64 pt;
+  Clipper2Lib::PointInPolygonResult in;
+
+  if(!polygon || !point || !situation || icomponent >= polygon->paths.size()) {
+    res = RES_BAD_ARG;
+    goto error;
+  }
+
+  ERR(scpr_device_scale(polygon->device, point, 2, tmp64));
+  TRY(in = Clipper2Lib::PointInPolygon(pt, polygon->paths[icomponent]));
+  enum class PointInPolygonResult { IsOn, IsInside, IsOutside };
+  switch(in) {
+    case Clipper2Lib::PointInPolygonResult::IsOn:
+      *situation = 0;
+      break;
+    case Clipper2Lib::PointInPolygonResult::IsOutside:
+      *situation = -1;
+      break;
+    case Clipper2Lib::PointInPolygonResult::IsInside:
+      *situation = +1;
+      break;
+  }
+
+exit:
+  return res;
+error:
+  goto exit;
+}
+
+res_T
 scpr_polygon_dump_to_obj
   (struct scpr_polygon* polygon,
    FILE* stream)