1 files changed, 139 insertions, 0 deletions
diff --git a/Plugins/MonoGame.Extended/source/MonoGame.Extended.Tiled/Serialization/TiledMapLayerModelContent.cs b/Plugins/MonoGame.Extended/source/MonoGame.Extended.Tiled/Serialization/TiledMapLayerModelContent.cs
new file mode 100644
index 0000000..4c2a761
--- /dev/null
+++ b/Plugins/MonoGame.Extended/source/MonoGame.Extended.Tiled/Serialization/TiledMapLayerModelContent.cs
@@ -0,0 +1,139 @@
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Diagnostics;
+using System.IO;
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+
+namespace MonoGame.Extended.Tiled.Serialization
+{
+    public class TiledMapLayerModelContent
+    {
+        private readonly List<VertexPositionTexture> _vertices;
+        private readonly List<ushort> _indices;
+
+        public string LayerName { get; }
+        public ReadOnlyCollection<VertexPositionTexture> Vertices { get; }
+        public ReadOnlyCollection<ushort> Indices { get; }
+        public Size2 ImageSize { get; }
+        public string TextureAssetName { get; }
+
+        public TiledMapLayerModelContent(string layerName, TiledMapImageContent image)
+        {
+            LayerName = layerName;
+            _vertices = new List<VertexPositionTexture>();
+            Vertices = new ReadOnlyCollection<VertexPositionTexture>(_vertices);
+            _indices = new List<ushort>();
+            Indices = new ReadOnlyCollection<ushort>(_indices);
+            ImageSize = new Size2(image.Width, image.Height);
+            TextureAssetName = Path.ChangeExtension(image.Source, null);
+        }
+
+        public TiledMapLayerModelContent(string layerName, TiledMapTilesetContent tileset)
+            : this(layerName, tileset.Image)
+        {
+        }
+
+        public void AddTileVertices(Point2 position, Rectangle? sourceRectangle = null, TiledMapTileFlipFlags flags = TiledMapTileFlipFlags.None)
+        {
+            float texelLeft, texelTop, texelRight, texelBottom;
+            var sourceRectangle1 = sourceRectangle ?? new Rectangle(0, 0, (int)ImageSize.Width, (int)ImageSize.Height);
+
+            if (sourceRectangle.HasValue)
+            {
+                var reciprocalWidth = 1f / ImageSize.Width;
+                var reciprocalHeight = 1f / ImageSize.Height;
+                texelLeft = sourceRectangle1.X * reciprocalWidth;
+                texelTop = sourceRectangle1.Y * reciprocalHeight;
+                texelRight = (sourceRectangle1.X + sourceRectangle1.Width) * reciprocalWidth;
+                texelBottom = (sourceRectangle1.Y + sourceRectangle1.Height) * reciprocalHeight;
+            }
+            else
+            {
+                texelLeft = 0;
+                texelTop = 0;
+                texelBottom = 1;
+                texelRight = 1;
+            }
+
+            VertexPositionTexture vertexTopLeft, vertexTopRight, vertexBottomLeft, vertexBottomRight;
+
+            vertexTopLeft.Position = new Vector3(position, 0);
+            vertexTopRight.Position = new Vector3(position + new Vector2(sourceRectangle1.Width, 0), 0);
+            vertexBottomLeft.Position = new Vector3(position + new Vector2(0, sourceRectangle1.Height), 0);
+            vertexBottomRight.Position =
+                new Vector3(position + new Vector2(sourceRectangle1.Width, sourceRectangle1.Height), 0);
+
+            vertexTopLeft.TextureCoordinate.Y = texelTop;
+            vertexTopLeft.TextureCoordinate.X = texelLeft;
+
+            vertexTopRight.TextureCoordinate.Y = texelTop;
+            vertexTopRight.TextureCoordinate.X = texelRight;
+
+            vertexBottomLeft.TextureCoordinate.Y = texelBottom;
+            vertexBottomLeft.TextureCoordinate.X = texelLeft;
+
+            vertexBottomRight.TextureCoordinate.Y = texelBottom;
+            vertexBottomRight.TextureCoordinate.X = texelRight;
+
+            var flipDiagonally = (flags & TiledMapTileFlipFlags.FlipDiagonally) != 0;
+            var flipHorizontally = (flags & TiledMapTileFlipFlags.FlipHorizontally) != 0;
+            var flipVertically = (flags & TiledMapTileFlipFlags.FlipVertically) != 0;
+
+            if (flipDiagonally)
+            {
+                FloatHelper.Swap(ref vertexTopRight.TextureCoordinate.X, ref vertexBottomLeft.TextureCoordinate.X);
+                FloatHelper.Swap(ref vertexTopRight.TextureCoordinate.Y, ref vertexBottomLeft.TextureCoordinate.Y);
+            }
+
+            if (flipHorizontally)
+            {
+                if (flipDiagonally)
+                {
+                    FloatHelper.Swap(ref vertexTopLeft.TextureCoordinate.Y, ref vertexTopRight.TextureCoordinate.Y);
+                    FloatHelper.Swap(ref vertexBottomLeft.TextureCoordinate.Y, ref vertexBottomRight.TextureCoordinate.Y);
+                }
+                else
+                {
+                    FloatHelper.Swap(ref vertexTopLeft.TextureCoordinate.X, ref vertexTopRight.TextureCoordinate.X);
+                    FloatHelper.Swap(ref vertexBottomLeft.TextureCoordinate.X, ref vertexBottomRight.TextureCoordinate.X);
+                }
+            }
+
+            if (flipVertically)
+                if (flipDiagonally)
+                {
+                    FloatHelper.Swap(ref vertexTopLeft.TextureCoordinate.X, ref vertexBottomLeft.TextureCoordinate.X);
+                    FloatHelper.Swap(ref vertexTopRight.TextureCoordinate.X, ref vertexBottomRight.TextureCoordinate.X);
+                }
+                else
+                {
+                    FloatHelper.Swap(ref vertexTopLeft.TextureCoordinate.Y, ref vertexBottomLeft.TextureCoordinate.Y);
+                    FloatHelper.Swap(ref vertexTopRight.TextureCoordinate.Y, ref vertexBottomRight.TextureCoordinate.Y);
+                }
+
+            _vertices.Add(vertexTopLeft);
+            _vertices.Add(vertexTopRight);
+            _vertices.Add(vertexBottomLeft);
+            _vertices.Add(vertexBottomRight);
+
+            Debug.Assert(Vertices.Count <= TiledMapHelper.MaximumVerticesPerModel);
+        }
+
+        public void AddTileIndices()
+        {
+            var indexOffset = Vertices.Count;
+
+            Debug.Assert(3 + indexOffset <= TiledMapHelper.MaximumVerticesPerModel);
+
+            _indices.Add((ushort)(0 + indexOffset));
+            _indices.Add((ushort)(1 + indexOffset));
+            _indices.Add((ushort)(2 + indexOffset));
+            _indices.Add((ushort)(1 + indexOffset));
+            _indices.Add((ushort)(3 + indexOffset));
+            _indices.Add((ushort)(2 + indexOffset));
+
+            Debug.Assert(Indices.Count <= TiledMapHelper.MaximumIndicesPerModel);
+        }
+    }
+}