Code comments, log strings and some variable spell fixes.

src/osgShadow/ConvexPolyhedron.cpp

@@ -32,7 +32,7 @@ using namespace osgShadow;
 
 #if defined( DEBUG ) || defined( _DEBUG ) || defined( _DEBUG_ )
 // ConvexPolyhedron may produce tons of warnings when it becomes non convex.
-// Unfortuantely this condition often happens in daily routine of shadow usage
+// Unfortunately this condition often happens in daily routine of shadow usage
 // due precision errors mixed with repeating frustum cuts performed by MinimalShadowClasses.
 // However, in most of above cases this condition is not fatal
 // because polyhedron becomes concave by very small margin (measuring deep the hole).
@@ -301,7 +301,7 @@ void ConvexPolyhedron::transform(const osg::Matrix& matrix, const osg::Matrix& i
     }
 
     // Perpective transforms and lack of precision
-    // occasionaly cause removal of some points
+    // occasionally cause removal of some points
 
     removeDuplicateVertices( );
 
@@ -637,7 +637,7 @@ void ConvexPolyhedron::transformClip(const osg::Matrix& matrix, const osg::Matri
     }
 
     // Perpective transforms and lack of precision
-    // occasionaly cause removal of some points
+    // occasionally cause removal of some points
 
     removeDuplicateVertices( );
 

src/osgShadow/LightSpacePerspectiveShadowMap.cpp

@@ -35,7 +35,7 @@
 using namespace osgShadow;
 
 ////////////////////////////////////////////////////////////////////////////////
-// There are two slightly differing implemetations available on
+// There are two slightly differing implementations available on
 // "Light Space Perspective Shadow Maps" page. One from 2004 and other from 2006.
 // Our implementation is written in two versions based on these solutions.
 ////////////////////////////////////////////////////////////////////////////////
@@ -372,7 +372,7 @@ void LightSpacePerspectiveShadowMapAlgorithm::operator()
     double n = (z_n+sqrt(z_f*z_n))/sinGamma;
 
 #if ROBERTS_TEST_CHANGES
-    // clamp the localtion of p so that it isn't too close to the eye as to cause problems
+    // clamp the location of p so that it isn't too close to the eye as to cause problems
     float minRatio=0.02;
     if (n<d*minRatio)
     {

src/osgShadow/ViewDependentShadowMap.cpp

@@ -1854,7 +1854,7 @@ struct RenderLeafBounds
             else
             {
                 // no modelview matrix (such as when LightPointNode is in the scene graph) so assume
-                // that modelview matrix is indentity.
+                // that modelview matrix is identity.
                 light_mvp = light_p;
             }
             // OSG_INFO<<"Computing new light_mvp "<<light_mvp<<std::endl;