Handle NCC flag in Nif files. Objects with this flag will collide only with camera.

Expose objects with NC flag to be used by Lua mods.

CHANGELOG.md

@@ -140,6 +140,7 @@
     Feature #6380: Commas are treated as whitespace in vanilla
     Feature #6419: Topics shouldn't be greyed out if they can produce another topic reference
     Feature #6443: Support NiStencilProperty
+    Feature #6496: NCC flag isn't handled properly
     Feature #6534: Shader-based object texture blending
     Feature #6541: Gloss-mapping
     Feature #6592: Missing support for NiTriShape particle emitters

apps/openmw/mwlua/nearbybindings.cpp

@@ -54,7 +54,10 @@ namespace MWLua
             {"HeightMap", MWPhysics::CollisionType_HeightMap},
             {"Projectile", MWPhysics::CollisionType_Projectile},
             {"Water", MWPhysics::CollisionType_Water},
-            {"Default", MWPhysics::CollisionType_Default}
+            {"Default", MWPhysics::CollisionType_Default},
+            {"AnyPhysical", MWPhysics::CollisionType_AnyPhysical},
+            {"Camera", MWPhysics::CollisionType_CameraOnly},
+            {"VisualOnly", MWPhysics::CollisionType_VisualOnly},
         }));
 
         api["castRay"] = [](const osg::Vec3f& from, const osg::Vec3f& to, sol::optional<sol::table> options)

apps/openmw/mwphysics/collisiontype.hpp

@@ -11,7 +11,10 @@ enum CollisionType {
     CollisionType_HeightMap = 1<<3,
     CollisionType_Projectile = 1<<4,
     CollisionType_Water = 1<<5,
-    CollisionType_Default = CollisionType_World|CollisionType_HeightMap|CollisionType_Actor|CollisionType_Door
+    CollisionType_Default = CollisionType_World|CollisionType_HeightMap|CollisionType_Actor|CollisionType_Door,
+    CollisionType_AnyPhysical = CollisionType_World|CollisionType_HeightMap|CollisionType_Actor|CollisionType_Door|CollisionType_Projectile|CollisionType_Water,
+    CollisionType_CameraOnly = 1<<6,
+    CollisionType_VisualOnly = 1<<7
 };
 
 }

apps/openmw/mwphysics/movementsolver.cpp

@@ -101,7 +101,7 @@ namespace MWPhysics
         btVector3 to = from - btVector3(0,0,maxHeight);
 
         btCollisionWorld::ClosestRayResultCallback resultCallback1(from, to);
-        resultCallback1.m_collisionFilterGroup = 0xff;
+        resultCallback1.m_collisionFilterGroup = CollisionType_AnyPhysical;
         resultCallback1.m_collisionFilterMask = CollisionType_World|CollisionType_HeightMap;
 
         collisionWorld->rayTest(from, to, resultCallback1);
@@ -426,7 +426,7 @@ namespace MWPhysics
             return;
 
         ProjectileConvexCallback resultCallback(projectile.mCaster, projectile.mCollisionObject, btFrom, btTo, projectile.mProjectile);
-        resultCallback.m_collisionFilterMask = 0xff;
+        resultCallback.m_collisionFilterMask = CollisionType_AnyPhysical;
         resultCallback.m_collisionFilterGroup = CollisionType_Projectile;
 
         const btQuaternion btrot = btQuaternion::getIdentity();

apps/openmw/mwphysics/mtphysics.cpp

@@ -661,7 +661,7 @@ namespace MWPhysics
         btVector3 pos2  = Misc::Convert::toBullet(actor2->getCollisionObjectPosition() + osg::Vec3f(0,0,actor2->getHalfExtents().z() * 0.9));
 
         btCollisionWorld::ClosestRayResultCallback resultCallback(pos1, pos2);
-        resultCallback.m_collisionFilterGroup = 0xFF;
+        resultCallback.m_collisionFilterGroup = CollisionType_AnyPhysical;
         resultCallback.m_collisionFilterMask = CollisionType_World|CollisionType_HeightMap|CollisionType_Door;
 
         MaybeLock lockColWorld(mCollisionWorldMutex, mNumThreads);

apps/openmw/mwphysics/physicssystem.cpp

@@ -490,6 +490,17 @@ namespace MWPhysics
 
         assert(!getObject(ptr));
 
+        // Override collision type based on shape content.
+        switch (shapeInstance->mCollisionType)
+        {
+            case Resource::BulletShape::CollisionType::Camera:
+                collisionType = CollisionType_CameraOnly;
+                break;
+            case Resource::BulletShape::CollisionType::None:
+                collisionType = CollisionType_VisualOnly;
+                break;
+        }
+
         auto obj = std::make_shared<Object>(ptr, shapeInstance, rotation, collisionType, mTaskScheduler.get());
         mObjects.emplace(ptr.mRef, obj);
 
@@ -905,7 +916,7 @@ namespace MWPhysics
         const auto aabbMin = bulletPosition - btVector3(radius, radius, radius);
         const auto aabbMax = bulletPosition + btVector3(radius, radius, radius);
         const int mask = MWPhysics::CollisionType_Actor;
-        const int group = 0xff;
+        const int group = MWPhysics::CollisionType_AnyPhysical;
         if (occupyingActors == nullptr)
         {
             HasSphereCollisionCallback callback(bulletPosition, radius, mask, group, ignoreFilter,

apps/openmw/mwrender/camera.cpp

@@ -53,7 +53,7 @@ namespace MWRender
 
     Camera::Camera (osg::Camera* camera)
     : mHeightScale(1.f),
-      mCollisionType(MWPhysics::CollisionType::CollisionType_Default & ~MWPhysics::CollisionType::CollisionType_Actor),
+      mCollisionType((MWPhysics::CollisionType::CollisionType_Default & ~MWPhysics::CollisionType::CollisionType_Actor) | MWPhysics::CollisionType_CameraOnly),
       mCamera(camera),
       mAnimation(nullptr),
       mFirstPersonView(true),

apps/openmw_test_suite/nifloader/testbulletnifloader.cpp

@@ -1009,9 +1009,9 @@ namespace
         EXPECT_EQ(*result, expected);
     }
 
-    TEST_F(TestBulletNifLoader, for_tri_shape_child_node_with_extra_data_string_starting_with_nc_should_return_shape_with_null_collision_shape)
+    TEST_F(TestBulletNifLoader, for_tri_shape_child_node_with_extra_data_string_equal_ncc_should_return_shape_with_cameraonly_collision)
     {
-        mNiStringExtraData.string = "NC___";
+        mNiStringExtraData.string = "NCC__";
         mNiStringExtraData.recType = Nif::RC_NiStringExtraData;
         mNiTriShape.extra = Nif::ExtraPtr(&mNiStringExtraData);
         mNiTriShape.parents.push_back(&mNiNode);
@@ -1022,12 +1022,16 @@ namespace
         EXPECT_CALL(mNifFile, getFilename()).WillOnce(Return("test.nif"));
         const auto result = mLoader.load(mNifFile);
 
+        std::unique_ptr<btTriangleMesh> triangles(new btTriangleMesh(false));
+        triangles->addTriangle(btVector3(0, 0, 0), btVector3(1, 0, 0), btVector3(1, 1, 0));
         Resource::BulletShape expected;
+        expected.mCollisionShape.reset(new Resource::TriangleMeshShape(triangles.release(), true));
+        expected.mCollisionType = Resource::BulletShape::CollisionType::Camera;
 
         EXPECT_EQ(*result, expected);
     }
 
-    TEST_F(TestBulletNifLoader, for_tri_shape_child_node_with_not_first_extra_data_string_starting_with_nc_should_return_shape_with_null_collision_shape)
+    TEST_F(TestBulletNifLoader, for_tri_shape_child_node_with_not_first_extra_data_string_equal_ncc_should_return_shape_with_cameraonly_collision)
     {
         mNiStringExtraData.next = Nif::ExtraPtr(&mNiStringExtraData2);
         mNiStringExtraData2.string = "NC___";
@@ -1041,7 +1045,57 @@ namespace
         EXPECT_CALL(mNifFile, getFilename()).WillOnce(Return("test.nif"));
         const auto result = mLoader.load(mNifFile);
 
+        std::unique_ptr<btTriangleMesh> triangles(new btTriangleMesh(false));
+        triangles->addTriangle(btVector3(0, 0, 0), btVector3(1, 0, 0), btVector3(1, 1, 0));
         Resource::BulletShape expected;
+        expected.mCollisionShape.reset(new Resource::TriangleMeshShape(triangles.release(), true));
+        expected.mCollisionType = Resource::BulletShape::CollisionType::Camera;
+
+        EXPECT_EQ(*result, expected);
+    }
+
+
+    TEST_F(TestBulletNifLoader, for_tri_shape_child_node_with_extra_data_string_starting_with_nc_should_return_shape_with_nocollision)
+    {
+        mNiStringExtraData.string = "NC___";
+        mNiStringExtraData.recType = Nif::RC_NiStringExtraData;
+        mNiTriShape.extra = Nif::ExtraPtr(&mNiStringExtraData);
+        mNiTriShape.parents.push_back(&mNiNode);
+        mNiNode.children = Nif::NodeList(std::vector<Nif::NodePtr>({Nif::NodePtr(&mNiTriShape)}));
+
+        EXPECT_CALL(mNifFile, numRoots()).WillOnce(Return(1));
+        EXPECT_CALL(mNifFile, getRoot(0)).WillOnce(Return(&mNiNode));
+        EXPECT_CALL(mNifFile, getFilename()).WillOnce(Return("test.nif"));
+        const auto result = mLoader.load(mNifFile);
+
+        std::unique_ptr<btTriangleMesh> triangles(new btTriangleMesh(false));
+        triangles->addTriangle(btVector3(0, 0, 0), btVector3(1, 0, 0), btVector3(1, 1, 0));
+        Resource::BulletShape expected;
+        expected.mCollisionShape.reset(new Resource::TriangleMeshShape(triangles.release(), true));
+        expected.mCollisionType = Resource::BulletShape::CollisionType::None;
+
+        EXPECT_EQ(*result, expected);
+    }
+
+    TEST_F(TestBulletNifLoader, for_tri_shape_child_node_with_not_first_extra_data_string_starting_with_nc_should_return_shape_with_nocollision)
+    {
+        mNiStringExtraData.next = Nif::ExtraPtr(&mNiStringExtraData2);
+        mNiStringExtraData2.string = "NC___";
+        mNiStringExtraData2.recType = Nif::RC_NiStringExtraData;
+        mNiTriShape.extra = Nif::ExtraPtr(&mNiStringExtraData);
+        mNiTriShape.parents.push_back(&mNiNode);
+        mNiNode.children = Nif::NodeList(std::vector<Nif::NodePtr>({Nif::NodePtr(&mNiTriShape)}));
+
+        EXPECT_CALL(mNifFile, numRoots()).WillOnce(Return(1));
+        EXPECT_CALL(mNifFile, getRoot(0)).WillOnce(Return(&mNiNode));
+        EXPECT_CALL(mNifFile, getFilename()).WillOnce(Return("test.nif"));
+        const auto result = mLoader.load(mNifFile);
+
+        std::unique_ptr<btTriangleMesh> triangles(new btTriangleMesh(false));
+        triangles->addTriangle(btVector3(0, 0, 0), btVector3(1, 0, 0), btVector3(1, 1, 0));
+        Resource::BulletShape expected;
+        expected.mCollisionShape.reset(new Resource::TriangleMeshShape(triangles.release(), true));
+        expected.mCollisionType = Resource::BulletShape::CollisionType::None;
 
         EXPECT_EQ(*result, expected);
     }

components/nif/extra.hpp

@@ -55,9 +55,10 @@ struct NiTextKeyExtraData : public Extra
 
 struct NiStringExtraData : public Extra
 {
-    /* Two known meanings:
+    /* Known meanings:
        "MRK" - marker, only visible in the editor, not rendered in-game
-       "NCO" - no collision
+       "NCC" - no collision except with the camera
+       Anything else starting with "NC" - no collision
     */
     std::string string;
 

components/nifbullet/bulletnifloader.cpp

@@ -17,6 +17,8 @@
 #include <components/nif/extra.hpp>
 #include <components/nif/parent.hpp>
 
+#include <components/settings/settings.hpp>
+
 namespace
 {
 
@@ -215,7 +217,7 @@ osg::ref_ptr<Resource::BulletShape> BulletNifLoader::load(const Nif::File& nif)
     for (const Nif::Node* node : roots)
     {
         bool autogenerated = hasAutoGeneratedCollision(*node);
-        handleNode(filename, *node, nullptr, 0, autogenerated, isAnimated, autogenerated);
+        handleNode(filename, *node, nullptr, 0, autogenerated, isAnimated, autogenerated, false, mShape->mCollisionType);
     }
 
     if (mCompoundShape)
@@ -307,7 +309,7 @@ bool BulletNifLoader::hasAutoGeneratedCollision(const Nif::Node& rootNode)
 }
 
 void BulletNifLoader::handleNode(const std::string& fileName, const Nif::Node& node, const Nif::Parent* parent,
-    int flags, bool isCollisionNode, bool isAnimated, bool autogenerated, bool avoid)
+    int flags, bool isCollisionNode, bool isAnimated, bool autogenerated, bool avoid, unsigned int& collisionType)
 {
     // TODO: allow on-the fly collision switching via toggling this flag
     if (node.recType == Nif::RC_NiCollisionSwitch && !(node.flags & Nif::NiNode::Flag_ActiveCollision))
@@ -341,8 +343,13 @@ void BulletNifLoader::handleNode(const std::string& fileName, const Nif::Node& n
 
             if (Misc::StringUtils::ciCompareLen(sd->string, "NC", 2) == 0)
             {
-                // No collision. Use an internal flag setting to mark this.
+                // NCC flag in vanilla is partly case sensitive: prefix NC is case insensitive but second C needs be uppercase
-                flags |= 0x800;
+                if (sd->string.length() > 2 && sd->string[2] == 'C')
+                    // Collide only with camera.
+                    collisionType = Resource::BulletShape::CollisionType::Camera;
+                else
+                    // No collision.
+                    collisionType = Resource::BulletShape::CollisionType::None;
             }
             else if (sd->string == "MRK" && autogenerated)
             {
@@ -362,7 +369,7 @@ void BulletNifLoader::handleNode(const std::string& fileName, const Nif::Node& n
                                 || node.recType == Nif::RC_NiTriStrips
                                 || node.recType == Nif::RC_BSLODTriShape))
         {
-            handleNiTriShape(node, parent, flags, getWorldTransform(node, parent), isAnimated, avoid);
+            handleNiTriShape(static_cast<const Nif::NiGeometry&>(node), parent, getWorldTransform(node, parent), isAnimated, avoid);
         }
     }
 
@@ -377,22 +384,11 @@ void BulletNifLoader::handleNode(const std::string& fileName, const Nif::Node& n
                 continue;
 
             assert(std::find(list[i]->parents.begin(), list[i]->parents.end(), ninode) != list[i]->parents.end());
-            handleNode(fileName, list[i].get(), &currentParent, flags, isCollisionNode, isAnimated, autogenerated, avoid);
+            handleNode(fileName, list[i].get(), &currentParent, flags, isCollisionNode, isAnimated, autogenerated, avoid, collisionType);
         }
     }
 }
 
-void BulletNifLoader::handleNiTriShape(const Nif::Node& nifNode, const Nif::Parent* parent, int flags,
-    const osg::Matrixf &transform, bool isAnimated, bool avoid)
-{
-    // If the object was marked "NCO" earlier, it shouldn't collide with
-    // anything. So don't do anything.
-    if ((flags & 0x800))
-        return;
-
-    handleNiTriShape(static_cast<const Nif::NiGeometry&>(nifNode), parent, transform, isAnimated, avoid);
-}
-
 void BulletNifLoader::handleNiTriShape(const Nif::NiGeometry& niGeometry, const Nif::Parent* nodeParent,
     const osg::Matrixf &transform, bool isAnimated, bool avoid)
 {

components/nifbullet/bulletnifloader.hpp

@@ -56,14 +56,11 @@ public:
 private:
     bool findBoundingBox(const Nif::Node& node, const std::string& filename);
 
-    void handleNode(const std::string& fileName, const Nif::Node& node, const Nif::Parent* parent, int flags,
+    void handleNode(const std::string& fileName, const Nif::Node& node,const Nif::Parent* parent, int flags,
-        bool isCollisionNode, bool isAnimated=false, bool autogenerated=false, bool avoid=false);
+        bool isCollisionNode, bool isAnimated, bool autogenerated, bool avoid, unsigned int& cameraOnlyCollision);
 
     bool hasAutoGeneratedCollision(const Nif::Node& rootNode);
 
-    void handleNiTriShape(const Nif::Node& nifNode, const Nif::Parent* parent, int flags, const osg::Matrixf& transform,
-        bool isAnimated, bool avoid);
-
     void handleNiTriShape(const Nif::NiGeometry& nifNode, const Nif::Parent* parent, const osg::Matrixf& transform,
         bool isAnimated, bool avoid);
 

components/resource/bulletshape.cpp

@@ -96,6 +96,7 @@ BulletShapeInstance::BulletShapeInstance(osg::ref_ptr<const BulletShape> source)
 {
     mCollisionBox = mSource->mCollisionBox;
     mAnimatedShapes = mSource->mAnimatedShapes;
+    mCollisionType = mSource->mCollisionType;
     mCollisionShape = duplicateCollisionShape(mSource->mCollisionShape.get());
     mAvoidCollisionShape = duplicateCollisionShape(mSource->mAvoidCollisionShape.get());
 }

components/resource/bulletshape.hpp

@@ -59,6 +59,13 @@ namespace Resource
         void setLocalScaling(const btVector3& scale);
 
         bool isAnimated() const { return !mAnimatedShapes.empty(); }
+
+        unsigned int mCollisionType = 0;
+        enum CollisionType
+        {
+            None = 0x1,
+            Camera = 0x2
+        };
     };
 
 

files/builtin_scripts/scripts/omw/camera.lua

@@ -24,7 +24,7 @@ local noHeadBobbing = 0
 local noZoom = 0
 
 local function init()
-    camera.setCollisionType(util.bitAnd(nearby.COLLISION_TYPE.Default, util.bitNot(nearby.COLLISION_TYPE.Actor)))
+    camera.setCollisionType(util.bitOr(util.bitAnd(nearby.COLLISION_TYPE.Default, util.bitNot(nearby.COLLISION_TYPE.Actor)), nearby.COLLISION_TYPE.Camera))
     camera.setFieldOfView(camera.getBaseFieldOfView())
     camera.allowCharacterDeferredRotation(settings._getBoolFromSettingsCfg('Camera', 'deferred preview rotation'))
     if camera.getMode() == MODE.FirstPerson then

files/builtin_scripts/scripts/omw/third_person.lua

@@ -28,10 +28,9 @@ local combatOffset = util.vector2(0, 15)
 
 local state = defaultShoulder
 
-local rayOptions = {collisionType = nearby.COLLISION_TYPE.Default - nearby.COLLISION_TYPE.Actor}
 local function ray(from, angle, limit)
     local to = from + util.transform.rotateZ(angle) * util.vector3(0, limit, 0)
-    local res = nearby.castRay(from, to, rayOptions)
+    local res = nearby.castRay(from, to, {collisionType = camera.getCollisionType()})
     if res.hit then
         return (res.hitPos - from):length()
     else

files/lua_api/openmw/nearby.lua

@@ -34,7 +34,10 @@
 -- @field [parent=#COLLISION_TYPE] #number HeightMap
 -- @field [parent=#COLLISION_TYPE] #number Projectile
 -- @field [parent=#COLLISION_TYPE] #number Water
--- @field [parent=#COLLISION_TYPE] #number Default Used by deafult: World+Door+Actor+HeightMap
+-- @field [parent=#COLLISION_TYPE] #number Default Used by default: World+Door+Actor+HeightMap
+-- @field [parent=#COLLISION_TYPE] #number AnyPhysical : World+Door+Actor+HeightMap+Projectile+Water
+-- @field [parent=#COLLISION_TYPE] #number Camera Objects that should collide only with camera
+-- @field [parent=#COLLISION_TYPE] #number VisualOnly Objects that were not intended to be part of the physics world
 
 ---
 -- Collision types that are used in `castRay`.