Added glSissor suppor via new osg::Scissor class.

Added .osg support for osg::Scissor.
Added .ive support for osg::Viewport and osg::Scissor.

src/osgPlugins/osg/Scissor.cpp

@@ -0,0 +1,71 @@
+#include "osg/Scissor"
+
+#include "osgDB/Registry"
+#include "osgDB/Input"
+#include "osgDB/Output"
+
+using namespace osg;
+using namespace osgDB;
+
+// forward declare functions to use later.
+bool Scissor_readLocalData(Object& obj, Input& fr);
+bool Scissor_writeLocalData(const Object& obj, Output& fw);
+
+// register the read and write functions with the osgDB::Registry.
+RegisterDotOsgWrapperProxy g_ScissorProxy
+(
+    new osg::Scissor,
+    "Scissor",
+    "Object StateAttribute Scissor",
+    &Scissor_readLocalData,
+    &Scissor_writeLocalData
+);
+
+
+bool Scissor_readLocalData(Object& obj, Input& fr)
+{
+    bool iteratorAdvanced = false;
+    int x = 0, y = 0, width = 0, height = 0;
+
+
+    if (fr[0].matchWord("x") && fr[1].getInt(x))
+    {
+        fr+=2;
+        iteratorAdvanced = true;
+    }
+
+    if (fr[0].matchWord("y") && fr[1].getInt(y))
+    {
+        fr+=2;
+        iteratorAdvanced = true;
+    }
+
+    if (fr[0].matchWord("width") && fr[1].getInt(width))
+    {
+        fr+=2;
+        iteratorAdvanced = true;
+    }
+
+    if (fr[0].matchWord("height") && fr[1].getInt(height))
+    {
+        fr+=2;
+        iteratorAdvanced = true;
+    }
+
+    Scissor& scissor = static_cast<Scissor&>(obj);
+    scissor.setScissor( x, y, width, height );
+    return iteratorAdvanced;
+}
+
+
+bool Scissor_writeLocalData(const Object& obj, Output& fw)
+{
+    const Scissor& scissor = static_cast<const Scissor&>(obj);
+
+    fw.indent() << "x " << scissor.x() << std::endl;
+    fw.indent() << "y " << scissor.y() << std::endl;
+    fw.indent() << "width " << scissor.width() << std::endl;
+    fw.indent() << "height " << scissor.height() << std::endl;
+
+    return true;
+}