From c7a7c8ddf2b210e6de5c2122c3c56cc254c8404a Mon Sep 17 00:00:00 2001
From: MaxYari <maksyarik@gmail.com>
Date: Wed, 5 Mar 2025 09:38:59 +0100
Subject: [PATCH] WIP

---
 apps/openmw/mwlua/types/actor.cpp | 35 +++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/apps/openmw/mwlua/types/actor.cpp b/apps/openmw/mwlua/types/actor.cpp
index 413a656e90..75e1f86bbf 100644
--- a/apps/openmw/mwlua/types/actor.cpp
+++ b/apps/openmw/mwlua/types/actor.cpp
@@ -2,6 +2,8 @@
 
 #include <array>
 
+#include <osg/Matrix>
+
 #include <components/detournavigator/agentbounds.hpp>
 #include <components/lua/luastate.hpp>
 #include <components/settings/values.hpp>
@@ -170,6 +172,29 @@ namespace MWLua
         MWBase::Environment::get().getWindowManager()->setSelectedEnchantItem(*it);
     }
 
+    static std::optional<osg::Matrix> findBoneWorldTransform(
+        const osg::ref_ptr<osg::Node> parentNode, const std::string_view boneName)
+    {
+        if (!parentNode)
+            return;
+        const osg::Group* parentNodeGroup = parentNode->asGroup();
+        if (!parentNodeGroup)
+            return;
+
+        for (unsigned int i = 0; i < parentNodeGroup->getNumChildren(); ++i)
+        {
+            osg::ref_ptr<const osg::Node> child = parentNodeGroup->getChild(i);
+
+            // asMatrixTransform will break if its not a bone
+            if (child->getName() == boneName)
+            {
+                return osg::computeLocalToWorld(child->getParentalNodePaths()[0]);
+            }
+
+            findBoneWorldTransform(child, boneName);
+        }
+    }
+
     void addActorBindings(sol::table actor, const Context& context)
     {
         sol::state_view lua = context.sol();
@@ -195,7 +220,17 @@ namespace MWLua
                 { "CarriedRight", MWWorld::InventoryStore::Slot_CarriedRight },
                 { "CarriedLeft", MWWorld::InventoryStore::Slot_CarriedLeft },
                 { "Ammunition", MWWorld::InventoryStore::Slot_Ammunition } }));
+        actor["getBonePosition"] = [](const SelfObject& self, std::string_view boneName) {
+            const MWWorld::Class& cls = self.ptr().getClass();
+            if (!cls.isActor())
+                throw std::runtime_error("Actor expected");
 
+            std::optional<osg::Matrix> boneTransform
+                = findBoneWorldTransform(self.ptr().getRefData().getBaseNode()->asGroup(), boneName);
+            return boneTransform;
+            // return o.ptr().getRefData().getPosition().asVec3();
+            // return Misc::Convert::makeOsgQuat(pos.rot);
+        };
         actor["getStance"] = [](const Object& o) {
             const MWWorld::Class& cls = o.ptr().getClass();
             if (cls.isActor())