From e86a1f887c7bfdf692a70f1e08be0a087ad0a8ab Mon Sep 17 00:00:00 2001
From: Nathan Adams <adamsna@datanethost.net>
Date: Sat, 5 May 2012 23:18:31 -0500
Subject: [PATCH] Removing uneeded Game Screen check Adding SplitFlat that
 takes in offsets

---
 axios/Engine/Extensions/Texture2D.cs    | 48 +++++++++++++++++++++++++
 axios/ScreenSystem/PhysicsGameScreen.cs |  7 ++--
 2 files changed, 51 insertions(+), 4 deletions(-)

diff --git a/axios/Engine/Extensions/Texture2D.cs b/axios/Engine/Extensions/Texture2D.cs
index 441557e..cab554a 100644
--- a/axios/Engine/Extensions/Texture2D.cs
+++ b/axios/Engine/Extensions/Texture2D.cs
@@ -180,6 +180,54 @@ namespace Axios.Engine.Extenions
             return r;
         }
 
+        /// http://gamedev.stackexchange.com/questions/11584/xna-splitting-one-large-texture-into-an-array-of-smaller-textures
+        /// <summary>
+        /// Splits a texture into an array of smaller textures of the specified size.
+        /// </summary>
+        /// <param name="original">The texture to be split into smaller textures</param>
+        /// <param name="partWidth">The width of each of the smaller textures that will be contained in the returned array.</param>
+        /// <param name="partHeight">The height of each of the smaller textures that will be contained in the returned array.</param>
+        public static Texture2D[] SplitFlat(this Texture2D original, int partWidth, int partHeight, int offsetWidth, int offsetHeight, out int xCount, out int yCount)
+        {
+            yCount = original.Height / partHeight; //+ (partHeight % original.Height == 0 ? 0 : 1);//The number of textures in each horizontal row
+            xCount = original.Width / partWidth; //+(partWidth % original.Width == 0 ? 0 : 1);//The number of textures in each vertical column
+            Texture2D[] r = new Texture2D[xCount * yCount];//Number of parts = (area of original) / (area of each part).
+            int dataPerPart = partWidth * partHeight;//Number of pixels in each of the split parts
+
+            //Get the pixel data from the original texture:
+            Color[] originalData = new Color[original.Width * original.Height];
+            original.GetData<Color>(originalData);
+
+            int index = 0;
+            for (int y = 0; y < yCount * partHeight; y += (partHeight + offsetHeight))
+                for (int x = 0; x < xCount * partWidth; x += (partWidth + offsetWidth))
+                {
+                    //The texture at coordinate {x, y} from the top-left of the original texture
+                    Texture2D part = new Texture2D(original.GraphicsDevice, partWidth, partHeight);
+                    //The data for part
+                    Color[] partData = new Color[dataPerPart];
+
+                    //Fill the part data with colors from the original texture
+                    for (int py = 0; py < partHeight; py++)
+                        for (int px = 0; px < partWidth; px++)
+                        {
+                            int partIndex = px + py * partWidth;
+                            //If a part goes outside of the source texture, then fill the overlapping part with Color.Transparent
+                            if (y + py >= original.Height || x + px >= original.Width)
+                                partData[partIndex] = Color.Transparent;
+                            else
+                                partData[partIndex] = originalData[(x + px) + (y + py) * original.Width];
+                        }
+
+                    //Fill the part with the extracted data
+                    part.SetData<Color>(partData);
+                    //Stick the part in the return array:                    
+                    r[index++] = part;
+                }
+            //Return the array of parts.
+            return r;
+        }
+
         /// http://forums.create.msdn.com/forums/t/79258.aspx
         /// <summary>
         /// Combines one texture with another
diff --git a/axios/ScreenSystem/PhysicsGameScreen.cs b/axios/ScreenSystem/PhysicsGameScreen.cs
index 74fc62d..3b19057 100644
--- a/axios/ScreenSystem/PhysicsGameScreen.cs
+++ b/axios/ScreenSystem/PhysicsGameScreen.cs
@@ -188,13 +188,12 @@ namespace GameStateManagement
             PlayerIndex i;
             if (input.IsNewButtonPress(Buttons.Back, PlayerIndex.One, out i) || input.IsNewKeyPress(Keys.Escape, PlayerIndex.One, out i))
             {
-                if (this.ScreenState == GameStateManagement.ScreenState.Active && this.TransitionPosition == 0 && this.TransitionAlpha == 1)
-                { //Give the screens a chance to transition
-
+                //if (this.ScreenState == GameStateManagement.ScreenState.Active && this.TransitionPosition == 0 && this.TransitionAlpha == 1)
+                //{ //Give the screens a chance to transition
                     CleanUp();
                     ExitScreen();
 
-                }
+                //}
             }
             base.HandleInput(gameTime, input);
         }