Apply UVControllers only for given UV Set (bug #4827)

CHANGELOG.md

@@ -22,6 +22,7 @@
     Bug #4803: Stray special characters before begin statement break script compilation
     Bug #4804: Particle system with the "Has Sizes = false" causes an exception
     Bug #4820: Spell absorption is broken
+    Bug #4827: NiUVController is handled incorrectly
     Feature #2229: Improve pathfinding AI
     Feature #3442: Default values for fallbacks from ini file
     Feature #3610: Option to invert X axis

components/nif/controller.cpp

@@ -139,7 +139,7 @@ namespace Nif
     {
         Controller::read(nif);
 
-        nif->getUShort(); // always 0
+        uvSet = nif->getUShort();
         data.read(nif);
     }
 

components/nif/controller.hpp

@@ -112,6 +112,7 @@ class NiUVController : public Controller
 {
 public:
     NiUVDataPtr data;
+    int uvSet;
 
     void read(NIFStream *nif);
     void post(NIFFile *nif);

components/nifosg/nifloader.cpp

@@ -648,9 +648,14 @@ namespace NifOsg
                 if (ctrl->recType == Nif::RC_NiUVController)
                 {
                     const Nif::NiUVController *niuvctrl = static_cast<const Nif::NiUVController*>(ctrl.getPtr());
+                    const int uvSet = niuvctrl->uvSet;
                     std::set<int> texUnits;
+                    // UVController should work only for textures which use a given UV Set, usually 0.
                     for (unsigned int i=0; i<boundTextures.size(); ++i)
-                        texUnits.insert(i);
+                    {
+                        if (boundTextures[i] == uvSet)
+                            texUnits.insert(i);
+                    }
 
                     osg::ref_ptr<UVController> uvctrl = new UVController(niuvctrl->data.getPtr(), texUnits);
                     setupController(niuvctrl, uvctrl, animflags);