Add basic NiPathController support (movement only)

components/nif/controller.cpp

@@ -123,12 +123,10 @@ namespace Nif
     {
         Controller::read(nif);
 
-        /*
+        bankDir = nif->getInt();
-           int = 1
+        maxBankAngle = nif->getFloat();
-           2xfloat
+        smoothing = nif->getFloat();
-           short = 0 or 1
+        followAxis = nif->getShort();
-        */
-        nif->skip(14);
         posData.read(nif);
         floatData.read(nif);
     }

components/nif/controller.hpp

@@ -96,6 +96,20 @@ public:
     NiPosDataPtr posData;
     NiFloatDataPtr floatData;
 
+    enum Flags
+    {
+        Flag_OpenCurve      = 0x020,
+        Flag_AllowFlip      = 0x040,
+        Flag_Bank           = 0x080,
+        Flag_ConstVelocity  = 0x100,
+        Flag_Follow         = 0x200,
+        Flag_FlipFollowAxis = 0x400
+    };
+
+    int bankDir;
+    float maxBankAngle, smoothing;
+    short followAxis;
+
     void read(NIFStream *nif);
     void post(NIFFile *nif);
 };

components/nifosg/controller.cpp

@@ -521,4 +521,50 @@ void ParticleSystemController::operator() (osg::Node* node, osg::NodeVisitor* nv
     traverse(node, nv);
 }
 
+PathController::PathController(const PathController &copy, const osg::CopyOp &copyop)
+    : osg::NodeCallback(copy, copyop)
+    , Controller(copy)
+    , mPath(copy.mPath)
+    , mPercent(copy.mPercent)
+    , mFlags(copy.mFlags)
+{
+}
+
+PathController::PathController(const Nif::NiPathController* ctrl)
+    : mPath(ctrl->posData->mKeyList, osg::Vec3f())
+    , mPercent(ctrl->floatData->mKeyList, 1.f)
+    , mFlags(ctrl->flags)
+{
+}
+
+float PathController::getPercent(float time) const
+{
+    float percent = mPercent.interpKey(time);
+    if (percent < 0.f)
+        percent = std::fmod(percent, 1.f) + 1.f;
+    else if (percent > 1.f)
+        percent = std::fmod(percent, 1.f);
+    return percent;
+}
+
+void PathController::operator() (osg::Node* node, osg::NodeVisitor* nv)
+{
+    if (mPath.empty() || mPercent.empty() || !hasInput())
+    {
+        traverse(node, nv);
+        return;
+    }
+
+    osg::MatrixTransform* trans = static_cast<osg::MatrixTransform*>(node);
+    osg::Matrix mat = trans->getMatrix();
+
+    float time = getInputValue(nv);
+    float percent = getPercent(time);
+    osg::Vec3f pos(mPath.interpKey(percent));
+    mat.setTrans(pos);
+    trans->setMatrix(mat);
+
+    traverse(node, nv);
+}
+
 }

components/nifosg/controller.hpp

@@ -342,6 +342,25 @@ namespace NifOsg
         float mEmitStop;
     };
 
+    class PathController : public osg::NodeCallback, public SceneUtil::Controller
+    {
+    public:
+        PathController(const Nif::NiPathController* ctrl);
+        PathController() = default;
+        PathController(const PathController& copy, const osg::CopyOp& copyop);
+
+        META_Object(NifOsg, PathController)
+
+        virtual void operator() (osg::Node*, osg::NodeVisitor*);
+
+    private:
+        Vec3Interpolator mPath;
+        FloatInterpolator mPercent;
+        int mFlags{0};
+
+        float getPercent(float time) const;
+    };
+
 }
 
 #endif

components/nifosg/nifloader.cpp

@@ -752,6 +752,17 @@ namespace NifOsg
                         node->addUpdateCallback(callback);
                     }
                 }
+                else if (ctrl->recType == Nif::RC_NiPathController)
+                {
+                    const Nif::NiPathController *path = static_cast<const Nif::NiPathController*>(ctrl.getPtr());
+                    if (!path->posData.empty() && !path->floatData.empty())
+                    {
+                        osg::ref_ptr<PathController> callback(new PathController(path));
+
+                        setupController(path, callback, animflags);
+                        node->addUpdateCallback(callback);
+                    }
+                }
                 else if (ctrl->recType == Nif::RC_NiVisController)
                 {
                     handleVisController(static_cast<const Nif::NiVisController*>(ctrl.getPtr()), node, animflags);
@@ -780,6 +791,17 @@ namespace NifOsg
                         transformNode->addUpdateCallback(callback);
                     }
                 }
+                else if (ctrl->recType == Nif::RC_NiPathController)
+                {
+                    const Nif::NiPathController *path = static_cast<const Nif::NiPathController*>(ctrl.getPtr());
+                    if (!path->posData.empty() && !path->floatData.empty())
+                    {
+                        osg::ref_ptr<PathController> callback(new PathController(path));
+
+                        setupController(path, callback, animflags);
+                        transformNode->addUpdateCallback(callback);
+                    }
+                }
                 else if (ctrl->recType == Nif::RC_NiVisController)
                 {
                     handleVisController(static_cast<const Nif::NiVisController*>(ctrl.getPtr()), transformNode, animflags);