From ed57c8718c6e92c2df491d56c0395eb800603829 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Mon, 12 Jan 2015 10:30:50 +0000
Subject: [PATCH] Added ability to populate a local vertex cache for when one
 computes final vertex position in a vertex shader but still want to the
 Primitive functors to work with the transformed positions.

git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14655 16af8721-9629-0410-8352-f15c8da7e697
---
 include/osg/PrimitiveSet             | 16 ++++++++++++++++
 include/osg/TemplatePrimitiveFunctor |  2 --
 include/osg/TriangleFunctor          |  2 --
 3 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/include/osg/PrimitiveSet b/include/osg/PrimitiveSet
index 3c1156f2a..df7df534d 100644
--- a/include/osg/PrimitiveSet
+++ b/include/osg/PrimitiveSet
@@ -119,6 +119,14 @@ public:
 
     /// Mimics the OpenGL \c glEnd() function.
     virtual void end() = 0;
+
+    void useVertexCacheAsVertexArray()
+    {
+        setVertexArray(_vertexCache.size(),&_vertexCache.front());
+    }
+
+    std::vector<Vec3>   _vertexCache;
+    bool                _treatVertexDataAsTemporary;
 };
 
 class PrimitiveIndexFunctor
@@ -143,6 +151,14 @@ public:
     virtual void begin(GLenum mode) = 0;
     virtual void vertex(unsigned int pos) = 0;
     virtual void end() = 0;
+
+    void useVertexCacheAsVertexArray()
+    {
+        setVertexArray(_vertexCache.size(),&_vertexCache.front());
+    }
+
+    std::vector<Vec3>   _vertexCache;
+    bool                _treatVertexDataAsTemporary;
 };
 
 class DrawElements;
diff --git a/include/osg/TemplatePrimitiveFunctor b/include/osg/TemplatePrimitiveFunctor
index 699e0c817..4d446b944 100644
--- a/include/osg/TemplatePrimitiveFunctor
+++ b/include/osg/TemplatePrimitiveFunctor
@@ -307,8 +307,6 @@ namespace osg {
         const Vec3*         _vertexArrayPtr;
 
         GLenum              _modeCache;
-        std::vector<Vec3>   _vertexCache;
-        bool                _treatVertexDataAsTemporary;
     };
 
 
diff --git a/include/osg/TriangleFunctor b/include/osg/TriangleFunctor
index a60af0940..4f7338a99 100644
--- a/include/osg/TriangleFunctor
+++ b/include/osg/TriangleFunctor
@@ -387,8 +387,6 @@ protected:
     const Vec3*         _vertexArrayPtr;
 
     GLenum              _modeCache;
-    std::vector<Vec3>   _vertexCache;
-    bool                _treatVertexDataAsTemporary;
 };