docs: Add missing ephysics group def in main.dox

diff --git a/doc/main.dox b/doc/main.dox
index ed1f8bb..9935f38 100644 (file)
--- a/doc/main.dox
+++ b/doc/main.dox
@@ -238,3 +238,9 @@
  *
  * @brief Generates thumbnail images of files.
  */
+
+ /**
+ * @defgroup EPhysics
+ *
+ * @brief Physics simulation integration and visual effects.
+ */