Refactored handling of StateAttiribute's that override the StateAttiribute::getMember() so that when they change their Member value they update the StateSet parents that own them to keep the StateSet's maps coherent.

include/osg/BlendEquationi

@@ -33,7 +33,7 @@ class OSG_EXPORT BlendEquationi : public BlendEquation
         BlendEquationi(unsigned int buf, Equation equationRGB, Equation equationAlpha):
             BlendEquation(equationRGB, equationAlpha),
             _index(buf) {}
-            
+
 
         /** Copy constructor using CopyOp to manage deep vs shallow copy. */
         BlendEquationi(const BlendEquationi& cm,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
@@ -58,7 +58,7 @@ class OSG_EXPORT BlendEquationi : public BlendEquation
         virtual unsigned int getMember() const { return _index; }
 
         /** Set the renderbuffer index of the BlendEquationi. */
-        void setIndex(unsigned int buf) { _index = buf; }
+        void setIndex(unsigned int buf);
 
         /** Get the renderbuffer index of the BlendEquationi. */
         unsigned int getIndex() const { return _index; }

include/osg/BlendFunci

@@ -57,7 +57,7 @@ class OSG_EXPORT BlendFunci : public BlendFunc
         virtual unsigned int getMember() const { return _index; }
 
         /** Set the renderbuffer index of the BlendFunci. */
-        void setIndex(unsigned int buf) { _index = buf; }
+        void setIndex(unsigned int buf);
 
         /** Get the renderbuffer index of the BlendFunci. */
         unsigned int getIndex() const { return _index; }

include/osg/BufferIndexBinding

@@ -51,16 +51,22 @@ class OSG_EXPORT BufferIndexBinding : public StateAttribute
 
     GLenum getTarget() const { return _target; }
 
+    /** Set the renderbuffer index of the BlendEquationi. */
+    void setIndex(unsigned int index);
+
     /** Get the index target.
      */
     GLuint getIndex() const { return _index; }
+
     /** Set the buffer object that will be bound to the index target.
      */
     void setBufferObject(BufferObject *bo) { _bufferObject = bo; }
+
     /** Get the buffer object to be bound.
      */
     const BufferObject* getBufferObject() const { return _bufferObject.get(); }
     BufferObject* getBufferObject(){ return _bufferObject.get(); }
+
     /** Set the starting offset into the buffer object for data for
     the indexed target. Note: the required  alignment on the offset
     may be quite large (e.g., 256 bytes on NVidia 8600M). This
@@ -68,16 +74,18 @@ class OSG_EXPORT BufferIndexBinding : public StateAttribute
     */
     void setOffset(GLintptr offset) { _offset = offset; }
     GLintptr getOffset() const { return _offset; }
+
     /** Set the size of data for the indexed target.
      */
     void setSize(GLsizeiptr size) { _size = size; }
     GLsizeiptr getSize() const { return _size; }
+
     virtual void apply(State& state) const;
 
  protected:
     virtual ~BufferIndexBinding();
     const GLenum _target;
-    const GLuint _index;
+    GLuint _index;
     ref_ptr<BufferObject> _bufferObject;
     GLintptr _offset;
     GLsizeiptr _size;

include/osg/ColorMaski

@@ -53,7 +53,7 @@ class OSG_EXPORT ColorMaski : public ColorMask
         virtual unsigned int getMember() const { return _index; }
 
         /** Set the renderbuffer index of the ColorMaski. */
-        void setIndex(unsigned int buf) { _index = buf; }
+        void setIndex(unsigned int buf);
 
         /** Get the renderbuffer index of the ColorMaski. */
         unsigned int getIndex() const { return _index; }

include/osg/StateAttribute

@@ -372,12 +372,26 @@ class OSG_EXPORT StateAttribute : public Object
         ParentList _parents;
         friend class osg::StateSet;
 
+        /** Helper class that make is easy to handle changes in a member value.*/
+        struct ReassignToParents
+        {
+            /** Constructor caches and then removes attribute for all of it's parents.*/
+            ReassignToParents(osg::StateAttribute* att);
+
+            /** Destructor then reassigns the attribute to all of the parents.*/
+            ~ReassignToParents();
+
+            ref_ptr<StateAttribute> attribute;
+            ParentList              parents;
+        };
+
+
         ref_ptr<ShaderComponent>          _shaderComponent;
 
         ref_ptr<StateAttributeCallback>   _updateCallback;
         ref_ptr<StateAttributeCallback>   _eventCallback;
 };
 
-}
 
+}
 #endif

src/osg/BlendEquationi.cpp

@@ -26,6 +26,15 @@ BlendEquationi::~BlendEquationi()
 {
 }
 
+void BlendEquationi::setIndex(unsigned int buf)
+{
+    if (_index==buf) return;
+
+    ReassignToParents needToReassingToParentsWhenMemberValueChanges(this);
+
+    _index = buf;
+}
+
 void BlendEquationi::apply(State& state) const
 {
     const GLExtensions* extensions = state.get<GLExtensions>();

src/osg/BlendFunci.cpp

@@ -26,6 +26,15 @@ BlendFunci::~BlendFunci()
 {
 }
 
+void BlendFunci::setIndex(unsigned int buf)
+{
+    if (_index==buf) return;
+
+    ReassignToParents needToReassingToParentsWhenMemberValueChanges(this);
+
+    _index = buf;
+}
+
 void BlendFunci::apply(State& state) const
 {
     const GLExtensions* extensions = state.get<GLExtensions>();

src/osg/BufferIndexBinding.cpp

@@ -48,6 +48,15 @@ BufferIndexBinding::~BufferIndexBinding()
 {
 }
 
+void BufferIndexBinding::setIndex(unsigned int index)
+{
+    if (_index==index) return;
+
+    ReassignToParents needToReassingToParentsWhenMemberValueChanges(this);
+
+    _index = index;
+}
+
 void BufferIndexBinding::apply(State& state) const
 {
     if (_bufferObject.valid())

src/osg/ClipPlane.cpp

@@ -31,41 +31,9 @@ void ClipPlane::setClipPlaneNum(unsigned int num)
 {
     if (_clipPlaneNum==num) return;
 
-    if (_parents.empty())
-    {
-        _clipPlaneNum = num;
-        return;
-    }
+    ReassignToParents needToReassingToParentsWhenMemberValueChanges(this);
 
-    // take a reference to this clip plane to prevent it from going out of scope
-    // when we remove it temporarily from its parents.
-    osg::ref_ptr<ClipPlane> clipPlaneRef = this;
-
-    // copy the parents as they _parents list will be changed by the subsequent removeAttributes.
-    ParentList parents = _parents;
-
-    // remove this attribute from its parents as its position is being changed
-    // and would no longer be valid.
-    ParentList::iterator itr;
-    for(itr = parents.begin();
-        itr != parents.end();
-        ++itr)
-    {
-        osg::StateSet* stateset = *itr;
-        stateset->removeAttribute(this);
-    }
-
-    // assign the clip plane number
     _clipPlaneNum = num;
-
-    // add this attribute back into its original parents with its new position
-    for(itr = parents.begin();
-        itr != parents.end();
-        ++itr)
-    {
-        osg::StateSet* stateset = *itr;
-        stateset->setAttribute(this);
-    }
 }
 
 unsigned int ClipPlane::getClipPlaneNum() const

src/osg/ColorMaski.cpp

@@ -25,6 +25,15 @@ ColorMaski::~ColorMaski()
 {
 }
 
+void ColorMaski::setIndex(unsigned int buf)
+{
+    if (_index==buf) return;
+
+    ReassignToParents needToReassingToParentsWhenMemberValueChanges(this);
+
+    _index = buf;
+}
+
 void ColorMaski::apply(State& state) const
 {
     const GLExtensions* extensions = state.get<GLExtensions>();

src/osg/Hint.cpp

@@ -27,40 +27,8 @@ void Hint::setTarget(GLenum target)
 {
     if (_target==target) return;
 
-    if (_parents.empty())
-    {
-        _target = target;
-        return;
-    }
+    ReassignToParents needToReassingToParentsWhenMemberValueChanges(this);
 
-    // take a reference to this clip plane to prevent it from going out of scope
-    // when we remove it temporarily from its parents.
-    osg::ref_ptr<Hint> hintRef = this;
-
-    // copy the parents as they _parents list will be changed by the subsequent removeAttributes.
-    ParentList parents = _parents;
-
-    // remove this attribute from its parents as its position is being changed
-    // and would no longer be valid.
-    ParentList::iterator itr;
-    for(itr = parents.begin();
-        itr != parents.end();
-        ++itr)
-    {
-        osg::StateSet* stateset = *itr;
-        stateset->removeAttribute(this);
-    }
-
-    // assign the hint target
     _target = target;
-
-    // add this attribute back into its original parents with its new position
-    for(itr = parents.begin();
-        itr != parents.end();
-        ++itr)
-    {
-        osg::StateSet* stateset = *itr;
-        stateset->setAttribute(this);
-    }
 }
 

src/osg/Light.cpp

@@ -62,41 +62,9 @@ void Light::setLightNum(int num)
 {
     if (_lightnum==num) return;
 
-    if (_parents.empty())
-    {
-        _lightnum = num;
-        return;
-    }
+    ReassignToParents needToReassingToParentsWhenMemberValueChanges(this);
 
-    // take a reference to this clip plane to prevent it from going out of scope
-    // when we remove it temporarily from its parents.
-    osg::ref_ptr<Light> lightRef = this;
-
-    // copy the parents as they _parents list will be changed by the subsequent removeAttributes.
-    ParentList parents = _parents;
-
-    // remove this attribute from its parents as its position is being changed
-    // and would no longer be valid.
-    ParentList::iterator itr;
-    for(itr = parents.begin();
-        itr != parents.end();
-        ++itr)
-    {
-        osg::StateSet* stateset = *itr;
-        stateset->removeAttribute(this);
-    }
-
-    // assign the hint target
     _lightnum = num;
-
-    // add this attribute back into its original parents with its new position
-    for(itr = parents.begin();
-        itr != parents.end();
-        ++itr)
-    {
-        osg::StateSet* stateset = *itr;
-        stateset->setAttribute(this);
-    }
 }
 
 void Light::captureLightState()

src/osg/StateAttribute.cpp

@@ -91,3 +91,41 @@ void StateAttribute::setEventCallback(StateAttributeCallback* ec)
         }
     }
 }
+
+StateAttribute::ReassignToParents::ReassignToParents(osg::StateAttribute* attr)
+{
+    if (!attr->isTextureAttribute() && !attr->getParents().empty())
+    {
+        // take a reference to this clip plane to prevent it from going out of scope
+        // when we remove it temporarily from its parents.
+        attribute = attr;
+
+        // copy the parents as they _parents list will be changed by the subsequent removeAttributes.
+        parents = attr->getParents();
+
+        // remove this attribute from its parents as its position is being changed
+        // and would no longer be valid.
+        for(ParentList::iterator itr = parents.begin();
+            itr != parents.end();
+            ++itr)
+        {
+            osg::StateSet* stateset = *itr;
+            stateset->removeAttribute(attr);
+
+            OSG_NOTICE<<"  Removed from parent "<<stateset<<std::endl;
+        }
+    }
+}
+
+StateAttribute::ReassignToParents::~ReassignToParents()
+{
+    // add attribute back into its original parents with its new position
+    for(ParentList::iterator itr = parents.begin();
+        itr != parents.end();
+        ++itr)
+    {
+        osg::StateSet* stateset = *itr;
+        stateset->setAttribute(attribute.get());
+        OSG_NOTICE<<"   Added back to parent "<<stateset<<std::endl;
+    }
+}