Added missing class api documentation.

gameplay/src/FrameBuffer.h

@@ -8,6 +8,15 @@
 namespace gameplay
 {
 
+/**
+ * Defines a video output off all graphics buffer containing a complete frame of data.
+ * This consists of a RenderTarget and DepthStencilTarget holding the color, depth and
+ * stencil data in the rendering frame. 
+ * 
+ * to change the default Game framebuffer call Game::setFrameBuffer(myFrameBuffer);
+ * To restore back to the default call Game::setFrameBuffer(NULL).
+ * This is useful for rendering shadows and other post-processing effects.
+ */
 class FrameBuffer : public Ref
 {
 public:

gameplay/src/MeshBatch.h

@@ -7,6 +7,9 @@
 namespace gameplay
 {
 
+/**
+ * Defines a class for rendering multiple mesh into a single draw call on the graphics device.
+ */
 class MeshBatch
 {
 public:

gameplay/src/Node.h

@@ -613,6 +613,9 @@ private:
 
 protected:
 
+    /**
+     * Defines a pointer and cleanup callback to custom user data that can be store in a Node.
+     */
     struct UserData
     {
         UserData() : pointer(NULL), cleanupCallback(NULL) {}

gameplay/src/RenderState.h

@@ -11,6 +11,9 @@ class Node;
 class NodeCloneContext;
 class Pass;
 
+/**
+ * Defines the render state of the graphics device.
+ */
 class RenderState : public Ref
 {
     friend class Game;

gameplay/src/RenderTarget.h

@@ -7,6 +7,10 @@
 namespace gameplay
 {
 
+/**
+ * Represents a linear area of display memory and usually reside 
+ * in the display memory of the display card.
+ */
 class RenderTarget : public Ref
 {
 public: