+ comments to the SM.Base

+ Length, Normalize methods for CVectors

SMCode/SM.Base/PostProcess/PostProcessEffect.cs

@@ -10,25 +10,39 @@ using SM.OGL.Shaders;
 
 namespace SM.Base.PostProcess
 {
+    /// <summary>
+    /// Basis for a post process effect
+    /// </summary>
     public abstract class PostProcessEffect
     {
         internal static Matrix4 Mvp;
         internal static Matrix4 Model;
 
-        public virtual ICollection<Framebuffer> RequiredFramebuffers { get; }
         
+        /// <summary>
+        /// Method, to initialize the shader.
+        /// </summary>
         public virtual void Init() {}
 
+
+        /// <summary>
+        /// Method, to initialize the shader.
+        /// </summary>
         public virtual void Init(Framebuffer main)
         {
             Init();
         }
 
-        public virtual void Draw(Framebuffer main, Framebuffer target)
-        {
-
-        }
+        /// <summary>
+        /// Method to draw the actual effect.
+        /// </summary>
+        /// <param name="main">The framebuffer, that was used.</param>
+        /// <param name="target">The framebuffer, the system should draw to.</param>
+        public abstract void Draw(Framebuffer main, Framebuffer target);
 
+        /// <summary>
+        /// Event, when the scene changed.
+        /// </summary>
         public virtual void SceneChanged(GenericScene scene)
         {