misc. typo fixes

mostly non-user-facing but some doxy.

examples/osgbindlesstext/osgbindlesstext.cpp

@@ -32,10 +32,10 @@
 /// with a different texture. Generally speaking in broad terms
 /// driver overhead tends to be a huge bottle neck on modern
 /// hardware (as of late 2016). By using bindless textures
-/// we can remove alot of calls to the driver to switch active 
+/// we can remove a lot of calls to the driver to switch active 
 /// textures while rendering. What this also allows us to do
 /// is to consolidate more objects + draw states as we do
-/// not need to change textures, this save us alot of calls to 
+/// not need to change textures, this save us a lot of calls to 
 /// the driver.
 ///
 /// This example combines instancing with bindless textures 
@@ -43,7 +43,7 @@
 /// a pretty simplified example, where each instance ID is 
 /// used as a index into the array of textures. 
 ///
-/// One of the powerfull things about bindless textures is it allows
+/// One of the powerful things about bindless textures is it allows
 /// many more objects to be combined into a single drawable. 
 /// However to do this you may need to add an attribute to 
 /// use an index into the array of texture handles, and not
@@ -261,7 +261,7 @@ void BindlessTexture::setBidlessIndex(unsigned int index){
     _bindlessIndex = index;
 }
 /// Just as the name suggest this should be called once per
-/// context, durring its lifetime. This basically 
+/// context, during its lifetime. This basically 
 /// just sets up our texture handles, and loads them
 /// into our UBO. A good portion of this was copied from
 /// Texture2D::apply, this is in no ways a general solution.
@@ -326,7 +326,7 @@ void BindlessTexture::apply(osg::State& state) const
        applyOnce(state);
        _isBound[contextID] = true;
    }else{
-       //we should mostly hit this durring the lifetime of this object,
+       //we should mostly hit this during the lifetime of this object,
        //note we basically do nothing......
    }
 }

examples/osgcluster/receiver.h

@@ -46,7 +46,7 @@ class Receiver
  	// Define what port to listen and bind to
 	void setPort( const short port );
 
-	// Sync does a blocking wait to recieve next message
+	// Sync does a blocking wait to receive next message
 	unsigned int sync( void );
 
     private :

examples/osgimpostor/osgimpostor.cpp

@@ -124,7 +124,7 @@ int main( int argc, char **argv )
             impostor->setRange(0,0.0f,1e7f);
             impostor->setCenter(bs.center());
 
-            // impostor specfic settings.
+            // impostor specific settings.
             impostor->setImpostorThresholdToBound(5.0f);
 
             model = impostor;

examples/osgtexture2D/osgtexture2D.cpp

@@ -613,7 +613,7 @@ public:
         // to be deleted and re-recreated.
         //
         // The load/subload happens during the draw traversal so doesn't happen on
-        // the setImage which just updates internal pointers and modifed flags.
+        // the setImage which just updates internal pointers and modified flags.
 
         _texture->setImage(_imageList[_currPos].get());
 

examples/osgviewerCocoa/ViewerCocoa.mm

@@ -70,7 +70,7 @@
  * This class packs a lot of functionality that you might not expect from a "Viewer".
  * The reason is that Mac users have high expectations of their applications, so things
  * that might not even be considered on other platforms (like drag-and-drop), are almost
- * a requirment on Mac OS X.
+ * a requirement on Mac OS X.
  * The good news is that this class can almost be used as a template for other purposes.
  * If you are looking for the bare minimum code needed, focus your attention on
  * the init* routines and drawRect.
@@ -782,7 +782,7 @@ A -respondsToSelector: check has been used to provide compatibility with previou
 }
 
 // This is a job for Mighty Mouse!
-// For the most fluid experience turn on 360 degree mode availble in 10.4.8+.
+// For the most fluid experience turn on 360 degree mode available in 10.4.8+.
 // With your Mighty Mouse plugged in,
 // open 'Keyboard & Mouse' in 'System Preferences'.
 // Select the 'Mouse' tab.
@@ -796,7 +796,7 @@ A -respondsToSelector: check has been used to provide compatibility with previou
     // This this call does nothing.
 //    theViewer->getEventQueue()->mouseScroll2D([the_event deltaX], [the_event deltaY]);
 
-    // With the absense of a useful mouseScroll2D API, we can manually simulate the desired effect.
+    // With the absence of a useful mouseScroll2D API, we can manually simulate the desired effect.
     NSPoint the_point = [the_event locationInWindow];
     NSPoint converted_point = [self convertPoint:the_point fromView:nil];
     theViewer->getEventQueue()->mouseButtonPress(converted_point.x, converted_point.y, 1);