Finish implementing packer, and write simple interface.

Unfortunately we will have to re-implement the Rectangle struct because we can't modify a value type apparently.

SpritePacker/Packer.cs

@@ -32,7 +32,7 @@ namespace SpritePacker
 			foreach(Sprite cspr in sprites)
 			{
 				Point scanLines = Point.Empty;
-				Point nextScanLines = scanLines;
+				Point nextScanLines = new Point(int.MaxValue, int.MaxValue);
 				while(true)
 				{
 					if (!cspr.IntersectsWith(arrangedSprites))
@@ -55,12 +55,16 @@ namespace SpritePacker
 						List<Sprite> problems = cspr.GetIntersectors(arrangedSprites);
 						Sprite rightProblem = problems[0];
 						foreach (Sprite probSpr in problems)
+						{
 							if (probSpr.Area.Right > rightProblem.Area.Right)
 								rightProblem = probSpr;
+							if (probSpr.Area.Top < nextScanLines.Y)
+								nextScanLines.Y = probSpr.Area.Top + 1;
+						}
 
 						// Move up to the position furthest to the right
 						// NOTE: We may need to add one here.
-						cspr.Area.X = furthestRightPos + 1;
+						cspr.Area.X = rightProblem.Area.Right + 1;
 
 					}
 
@@ -81,9 +85,12 @@ namespace SpritePacker
 							List<Sprite> problems = cspr.GetIntersectors(arrangedSprites);
 							Sprite downProblem = problems[0];
 							foreach (Sprite probSpr in problems)
+							{
 								if (probSpr.Area.Bottom > downProblem.Area.Bottom)
 									downProblem = probSpr;
-
+								if (probSpr.Area.Left < nextScanLines.X)
+									nextScanLines.X = probSpr.Area.Left + 1;
+							}
 							// Move up to the position furthest downwards
 							cspr.Area.Y = downProblem.Area.Bottom + 1;
 						}
@@ -93,146 +100,38 @@ namespace SpritePacker
 					if (foundPosition)
 						break;
 
+					// Make sure that the next scan lines are sane
+					if (nextScanLines.X == int.MaxValue)
+						nextScanLines.X = scanLines.X;
+					if (nextScanLines.Y == int.MaxValue)
+						nextScanLines.Y = scanLines.Y;
 
-				}
+					// If the next scan lines and the current scan lines are identical,
-				if (cspr.IntersectsWith(arrangedSprites))
+					// then something is very wrong
-				{
+					if(nextScanLines.Equals(scanLines))
-					// We have a conflict! Let's move it to try and sort this out.
+						throw new Exception("Failed to find the next set of lines to scan!");
-					List<Sprite> problemSprites = cspr.GetIntersectors(arrangedSprites);
+
-					// Find the problem sprite closest to (0, 0)
+					// Move the scan lines up to the next nearest ones we've found
-					Sprite mainProblem = problemSprites[0];
+					scanLines = nextScanLines;
-					foreach (Sprite pSpr in problemSprites) {
+					nextScanLines = new Point(int.MaxValue, int.MaxValue);
-						if ((pSpr.Area.X < mainProblem.Area.X && pSpr.Area.Y <= mainProblem.Area.Y) ||
-						    (pSpr.Area.Y < mainProblem.Area.Y && pSpr.Area.X <= mainProblem.Area.X))
-							mainProblem = pSpr;
 				}
 
-					Point scanBox = new Point(mainProblem.Area.X, mainProblem.Area.Y);
-
-
-				}
-				else
-				{
 				arrangedSprites.Add(cspr);
 			}
-			}
+
-		}
+			// We don't need to copy the list of arranged sprites across to the main list here
+			// because Sprite is a class and classes are passed by _reference_.
 		}
 
-	public class Sprite 
+		public override string ToString()
 		{
-		private Rectangle area;
+			string result = string.Format("SpritePacker:");
-		private string filename;
 
-		public Rectangle Area
+			foreach (Sprite spr in sprites)
-		{
+				result += string.Format("\t{0}\n", spr);
-			get { return area; }
-			set { area = value; }
-		}
-		public string Filename
-		{
-			get { return filename; }
-			set { filename = value; }
-		}
 
-		public Sprite(string inFilename)
-		{
-			Filename = inFilename;
-			// TODO: Fill in the area automagically based on the given image
-			throw new NotImplementedException("Todo: Fill in the area automagically based on the given image");
-		}
-
-		public static int GetLargestSize(List<Sprite> sprList)
-		{
-			int largestSoFar = 0;
-			foreach(Sprite spr in sprList)
-			{
-				if (spr.Area.Width > largestSoFar)
-					largestSoFar = spr.Area.Width;
-			}
-		}
-
-		public List<Sprite> GetIntersectors(List<Sprite> spriteList)
-		{
-			List<Sprite> result = new List<Sprite>();
-			foreach(Sprite spr in spriteList)
-			{
-				if (spr.IntersectsWith(this))
-					result.Add(spr);
-			}
 			return result;
 		}
-		public List<Sprite> GetIntersectorsX(List<Sprite> spriteList)
-		{
-			List<Sprite> result = new List<Sprite>();
-			foreach(Sprite spr in spriteList)
-			{
-				if (spr.IntersectsWithX(this))
-					result.Add(spr);
-			}
-			return result;
-		}
-		public List<Sprite> GetIntersectorsY(List<Sprite> spriteList)
-		{
-			List<Sprite> result = new List<Sprite>();
-			foreach(Sprite spr in spriteList)
-			{
-				if (spr.IntersectsWithY(this))
-					result.Add(spr);
-			}
-			return result;
-		}
-
-		public bool IntersectsWith(List<Sprite> otherSprites)
-		{
-			foreach (Sprite spr in otherSprites)
-			{
-				if (IntersectsWith(spr))
-					return true;
-			}
-			return false;
-		}
-		public bool IntersectsWith(Sprite otherSprite)
-		{
-			return otherSprite.Area.IntersectsWith(Area);
-		}
-
-		public bool IntersectsWithX(List<Sprite> otherSprites)
-		{
-			foreach (Sprite spr in otherSprites)
-			{
-				if (IntersectsWithX(spr))
-					return true;
-			}
-			return false;
-		}
-		public bool IntersectsWithY(List<Sprite> otherSprites)
-		{
-			foreach (Sprite spr in otherSprites)
-			{
-				if (IntersectsWithY(spr))
-					return true;
-			}
-			return false;
-		}
-
-		public bool IntersectsWithX(Sprite otherSprite)
-		{
-			if(Area.Right > otherSprite.Area.X &&
-				Area.X < otherSprite.Area.Right)
-				return true;
-			else
-				return false;
-		}
-		public bool IntersectsWithY(Sprite otherSprite)
-		{
-			if(Area.Bottom > otherSprite.Area.Y &&
-				Area.Y < otherSprite.Area.Bottom)
-				return true;
-			else
-				return false;
-		}
-
 	}
 }
 

SpritePacker/Program.cs

@@ -1,4 +1,7 @@
 using System;
+using System.Collections.Generic;
+using System.Windows.Markup;
+using System.IO;
 
 namespace SpritePacker
 {
@@ -6,7 +9,34 @@ namespace SpritePacker
 	{
 		public static void Main(string[] args)
 		{
-			Console.WriteLine("Hello World!");
+			List<string> values = new List<string>();
+			for(int i = 0; i < args.Length; i++)
+			{
+				switch(args[i])
+				{
+					case "--help":
+						Console.WriteLine("Help text coming soon!");
+						return;
+						break;
+					case "--version":
+						Console.WriteLine("Version text coming soon!");
+						break;
+					default:
+						values.Add(args[i]);
+						break;
+				}
+			}
+
+			Packer spritePacker = new Packer();
+			foreach(string filename in values)
+			{
+				if (File.Exists(filename))
+					spritePacker.Add(new Sprite(filename));
+				else
+					Console.Error.WriteLine("Warning: Ignoring non-existent file '{0}'.", filename);
+			}
+			spritePacker.Arrange();
+			Console.WriteLine(spritePacker.ToString());
 		}
 	}
 }

SpritePacker/Sprite.cs

@@ -0,0 +1,127 @@
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+
+namespace SpritePacker
+{
+	public class Sprite 
+	{
+		private Rectangle area;
+		private string filename;
+
+		public Rectangle Area
+		{
+			get { return area; }
+			set { area = value; }
+		}
+		public string Filename
+		{
+			get { return filename; }
+			set { filename = value; }
+		}
+
+		public Sprite(string inFilename)
+		{
+			Filename = inFilename;
+			// TODO: Fill in the area automagically based on the given image
+			throw new NotImplementedException("Todo: Fill in the area automagically based on the given image");
+		}
+
+		public static int GetLargestSize(List<Sprite> sprList)
+		{
+			int largestSoFar = 0;
+			foreach(Sprite spr in sprList)
+			{
+				if (spr.Area.Width > largestSoFar)
+					largestSoFar = spr.Area.Width;
+			}
+		}
+
+		public List<Sprite> GetIntersectors(List<Sprite> spriteList)
+		{
+			List<Sprite> result = new List<Sprite>();
+			foreach(Sprite spr in spriteList)
+			{
+				if (spr.IntersectsWith(this))
+					result.Add(spr);
+			}
+			return result;
+		}
+		public List<Sprite> GetIntersectorsX(List<Sprite> spriteList)
+		{
+			List<Sprite> result = new List<Sprite>();
+			foreach(Sprite spr in spriteList)
+			{
+				if (spr.IntersectsWithX(this))
+					result.Add(spr);
+			}
+			return result;
+		}
+		public List<Sprite> GetIntersectorsY(List<Sprite> spriteList)
+		{
+			List<Sprite> result = new List<Sprite>();
+			foreach(Sprite spr in spriteList)
+			{
+				if (spr.IntersectsWithY(this))
+					result.Add(spr);
+			}
+			return result;
+		}
+
+		public bool IntersectsWith(List<Sprite> otherSprites)
+		{
+			foreach (Sprite spr in otherSprites)
+			{
+				if (IntersectsWith(spr))
+					return true;
+			}
+			return false;
+		}
+		public bool IntersectsWith(Sprite otherSprite)
+		{
+			return otherSprite.Area.IntersectsWith(Area);
+		}
+
+		public bool IntersectsWithX(List<Sprite> otherSprites)
+		{
+			foreach (Sprite spr in otherSprites)
+			{
+				if (IntersectsWithX(spr))
+					return true;
+			}
+			return false;
+		}
+		public bool IntersectsWithY(List<Sprite> otherSprites)
+		{
+			foreach (Sprite spr in otherSprites)
+			{
+				if (IntersectsWithY(spr))
+					return true;
+			}
+			return false;
+		}
+
+		public bool IntersectsWithX(Sprite otherSprite)
+		{
+			if(Area.Right > otherSprite.Area.X &&
+				Area.X < otherSprite.Area.Right)
+				return true;
+			else
+				return false;
+		}
+		public bool IntersectsWithY(Sprite otherSprite)
+		{
+			if(Area.Bottom > otherSprite.Area.Y &&
+				Area.Y < otherSprite.Area.Bottom)
+				return true;
+			else
+				return false;
+		}
+
+		public override string ToString()
+		{
+			return string.Format("Sprite {0} at {1}", Filename, Area);
+		}
+	}
+}
+

SpritePacker/SpritePacker.csproj

@@ -37,6 +37,7 @@
     <Compile Include="Program.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Packer.cs" />
+    <Compile Include="Sprite.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
 </Project>