From 9754d0f43176fbbebacb8d56e6a40090456c7474 Mon Sep 17 00:00:00 2001
From: Simon Rohou <simon.rohou@gmail.com>
Date: Tue, 21 Jul 2026 16:39:01 +0200
Subject: [PATCH 1/2] [sep] SepInter and SepUnion can be built from a list of
 separators

---
 python/src/core/separators/codac2_py_SepInter.cpp | 11 +++++++++++
 python/src/core/separators/codac2_py_SepUnion.cpp | 11 +++++++++++
 src/core/separators/codac2_SepInter.h             |  8 ++++++++
 src/core/separators/codac2_SepUnion.h             |  8 ++++++++
 4 files changed, 38 insertions(+)

diff --git a/python/src/core/separators/codac2_py_SepInter.cpp b/python/src/core/separators/codac2_py_SepInter.cpp
index d650f67c1..4d2d2382d 100644
--- a/python/src/core/separators/codac2_py_SepInter.cpp
+++ b/python/src/core/separators/codac2_py_SepInter.cpp
@@ -24,6 +24,17 @@ void export_SepInter(py::module& m, py::class_<SepBase,pySep>& pysep)
   py::class_<SepInter> exported(m, "SepInter", pysep, SEPINTER_MAIN);
   exported
 
+    .def(py::init(
+        [](const py::list& l)
+        {
+          Collection<SepBase> l_copy;
+          for(const auto& li : l)
+            l_copy.push_back(li.cast<SepBase&>().copy());
+          return std::make_unique<SepInter>(l_copy);
+        }),
+      SEPINTER_SEPINTER_CONST_COLLECTION_T_REF,
+      "s"_a)
+
     .def(py::init(
         [](const SepBase& s)
         {
diff --git a/python/src/core/separators/codac2_py_SepUnion.cpp b/python/src/core/separators/codac2_py_SepUnion.cpp
index c8d32c0f4..29ea6ff70 100644
--- a/python/src/core/separators/codac2_py_SepUnion.cpp
+++ b/python/src/core/separators/codac2_py_SepUnion.cpp
@@ -24,6 +24,17 @@ void export_SepUnion(py::module& m, py::class_<SepBase,pySep>& pysep)
   py::class_<SepUnion> exported(m, "SepUnion", pysep, SEPUNION_MAIN);
   exported
 
+    .def(py::init(
+        [](const py::list& l)
+        {
+          Collection<SepBase> l_copy;
+          for(const auto& li : l)
+            l_copy.push_back(li.cast<SepBase&>().copy());
+          return std::make_unique<SepUnion>(l_copy);
+        }),
+      SEPUNION_SEPUNION_CONST_COLLECTION_T_REF,
+      "s"_a)
+
     .def(py::init(
         [](const SepBase& s)
         {
diff --git a/src/core/separators/codac2_SepInter.h b/src/core/separators/codac2_SepInter.h
index 979d2a753..23f95617b 100644
--- a/src/core/separators/codac2_SepInter.h
+++ b/src/core/separators/codac2_SepInter.h
@@ -20,6 +20,14 @@ namespace codac2
   {
     public:
 
+      template<typename T>
+      SepInter(const Collection<T>& c)
+        : Sep<SepInter>([&c]() {
+          assert_release(!c.empty());
+            return size_of(c.front());
+          }()), _seps(c)
+      { }
+
       template<typename S>
         requires (IsSepBaseOrPtr<S> && !std::is_same_v<SepInter,S>)
       SepInter(const S& s)
diff --git a/src/core/separators/codac2_SepUnion.h b/src/core/separators/codac2_SepUnion.h
index 33e5a87c8..e39461e07 100644
--- a/src/core/separators/codac2_SepUnion.h
+++ b/src/core/separators/codac2_SepUnion.h
@@ -20,6 +20,14 @@ namespace codac2
   {
     public:
 
+      template<typename T>
+      SepUnion(const Collection<T>& c)
+        : Sep<SepUnion>([&c]() {
+          assert_release(!c.empty());
+            return size_of(c.front());
+          }()), _seps(c)
+      { }
+
       template<typename S>
         requires (IsSepBaseOrPtr<S> && !std::is_same_v<SepUnion,S>)
       SepUnion(const S& s)

From 8fb98f99c2bed3c869b2b846ef18108030386181 Mon Sep 17 00:00:00 2001
From: Simon Rohou <simon.rohou@gmail.com>
Date: Tue, 21 Jul 2026 16:41:44 +0200
Subject: [PATCH 2/2] [doc] toctree file

---
 doc/manual/manual/contractors/shape/index.rst | 9 +++++++++
 1 file changed, 9 insertions(+)
 create mode 100644 doc/manual/manual/contractors/shape/index.rst

diff --git a/doc/manual/manual/contractors/shape/index.rst b/doc/manual/manual/contractors/shape/index.rst
new file mode 100644
index 000000000..87ef31424
--- /dev/null
+++ b/doc/manual/manual/contractors/shape/index.rst
@@ -0,0 +1,9 @@
+Shape contractors
+=================
+
+.. toctree::
+
+   CtcCtcBoundary <http://codac.io>
+   CtcWrapper <http://codac.io>
+   CtcImage <http://codac.io>
+   CtcDiscreteSet <http://codac.io>
\ No newline at end of file