From 8562c5d1f2b490bfd8ff01ec88d7878e16a2a16e Mon Sep 17 00:00:00 2001
From: Orange <orange-cpp@yandex.ru>
Date: Tue, 24 Mar 2026 05:28:01 +0300
Subject: [PATCH] added more unreachable checks

---
 source/engines/cry_engine/formulas.cpp       |  5 ++++-
 source/engines/frostbite_engine/formulas.cpp |  6 +++++-
 source/engines/iw_engine/formulas.cpp        | 15 ++++++++-------
 source/engines/source_engine/formulas.cpp    | 15 ++++++++-------
 source/engines/unity_engine/formulas.cpp     |  7 +++++--
 5 files changed, 30 insertions(+), 18 deletions(-)

diff --git a/source/engines/cry_engine/formulas.cpp b/source/engines/cry_engine/formulas.cpp
index 4d5bc94..301016b 100644
--- a/source/engines/cry_engine/formulas.cpp
+++ b/source/engines/cry_engine/formulas.cpp
@@ -41,6 +41,9 @@ namespace omath::cry_engine
             return mat_perspective_left_handed<float, MatStoreType::ROW_MAJOR, NDCDepthRange::ZERO_TO_ONE>(
                     field_of_view, aspect_ratio, near, far);
 
-        return mat_perspective_left_handed(field_of_view, aspect_ratio, near, far);
+        if (ndc_depth_range == NDCDepthRange::NEGATIVE_ONE_TO_ONE)
+            return mat_perspective_left_handed<float, MatStoreType::ROW_MAJOR, NDCDepthRange::NEGATIVE_ONE_TO_ONE>(
+                    field_of_view, aspect_ratio, near, far);
+        std::unreachable();
     }
 } // namespace omath::unity_engine
diff --git a/source/engines/frostbite_engine/formulas.cpp b/source/engines/frostbite_engine/formulas.cpp
index 2c0d6cc..c3193cb 100644
--- a/source/engines/frostbite_engine/formulas.cpp
+++ b/source/engines/frostbite_engine/formulas.cpp
@@ -41,6 +41,10 @@ namespace omath::frostbite_engine
             return mat_perspective_left_handed<float, MatStoreType::ROW_MAJOR, NDCDepthRange::ZERO_TO_ONE>(
                     field_of_view, aspect_ratio, near, far);
 
-        return mat_perspective_left_handed(field_of_view, aspect_ratio, near, far);
+        if (ndc_depth_range == NDCDepthRange::NEGATIVE_ONE_TO_ONE)
+            return mat_perspective_left_handed<float, MatStoreType::ROW_MAJOR, NDCDepthRange::NEGATIVE_ONE_TO_ONE>(
+                    field_of_view, aspect_ratio, near, far);
+
+        std::unreachable();
     }
 } // namespace omath::unity_engine
diff --git a/source/engines/iw_engine/formulas.cpp b/source/engines/iw_engine/formulas.cpp
index ca59ecd..e7ab4b8 100644
--- a/source/engines/iw_engine/formulas.cpp
+++ b/source/engines/iw_engine/formulas.cpp
@@ -50,12 +50,13 @@ namespace omath::iw_engine
                     {0, 0, far / (far - near), -(near * far) / (far - near)},
                     {0, 0, 1, 0},
             };
-
-        return {
-                {1.f / (aspect_ratio * fov_half_tan), 0, 0, 0},
-                {0, 1.f / (fov_half_tan), 0, 0},
-                {0, 0, (far + near) / (far - near), -(2.f * far * near) / (far - near)},
-                {0, 0, 1, 0},
-        };
+        if (ndc_depth_range == NDCDepthRange::NEGATIVE_ONE_TO_ONE)
+            return {
+                    {1.f / (aspect_ratio * fov_half_tan), 0, 0, 0},
+                    {0, 1.f / (fov_half_tan), 0, 0},
+                    {0, 0, (far + near) / (far - near), -(2.f * far * near) / (far - near)},
+                    {0, 0, 1, 0},
+            };
+        std::unreachable();
     };
 } // namespace omath::iw_engine
diff --git a/source/engines/source_engine/formulas.cpp b/source/engines/source_engine/formulas.cpp
index 0cf8084..85f7055 100644
--- a/source/engines/source_engine/formulas.cpp
+++ b/source/engines/source_engine/formulas.cpp
@@ -50,12 +50,13 @@ namespace omath::source_engine
                     {0, 0, far / (far - near), -(near * far) / (far - near)},
                     {0, 0, 1, 0},
             };
-
-        return {
-                {1.f / (aspect_ratio * fov_half_tan), 0, 0, 0},
-                {0, 1.f / (fov_half_tan), 0, 0},
-                {0, 0, (far + near) / (far - near), -(2.f * far * near) / (far - near)},
-                {0, 0, 1, 0},
-        };
+        if (ndc_depth_range == NDCDepthRange::NEGATIVE_ONE_TO_ONE)
+            return {
+                    {1.f / (aspect_ratio * fov_half_tan), 0, 0, 0},
+                    {0, 1.f / (fov_half_tan), 0, 0},
+                    {0, 0, (far + near) / (far - near), -(2.f * far * near) / (far - near)},
+                    {0, 0, 1, 0},
+            };
+        std::unreachable();
     }
 } // namespace omath::source_engine
diff --git a/source/engines/unity_engine/formulas.cpp b/source/engines/unity_engine/formulas.cpp
index 7e95525..51e4c4c 100644
--- a/source/engines/unity_engine/formulas.cpp
+++ b/source/engines/unity_engine/formulas.cpp
@@ -40,7 +40,10 @@ namespace omath::unity_engine
         if (ndc_depth_range == NDCDepthRange::ZERO_TO_ONE)
             return omath::mat_perspective_right_handed<float, MatStoreType::ROW_MAJOR, NDCDepthRange::ZERO_TO_ONE>(
                     field_of_view, aspect_ratio, near, far);
-
-        return omath::mat_perspective_right_handed(field_of_view, aspect_ratio, near, far);
+        if (ndc_depth_range == NDCDepthRange::NEGATIVE_ONE_TO_ONE)
+            return omath::mat_perspective_right_handed<float, MatStoreType::ROW_MAJOR,
+                                                       NDCDepthRange::NEGATIVE_ONE_TO_ONE>(field_of_view, aspect_ratio,
+                                                                                           near, far);
+        std::unreachable();
     }
 } // namespace omath::unity_engine