don't recreate the VertexPositionColorTexture array every time

CHANGELOG.md

@@ -13,6 +13,9 @@ Additions
 - Added GenericFont SplitStringSeparate which differentiates between existing newline characters and splits due to maximum width
 - Added StaticSpriteBatch class
 
+Improvements
+- Exposed Camera's RoundPosition
+
 ### MLEM.Ui
 Additions
 - Allow specifying a maximum amount of characters for a TextField

MLEM/Cameras/Camera.cs

@@ -58,7 +58,7 @@ namespace MLEM.Cameras {
             get {
                 var sc = this.ActualScale;
                 var pos = -this.Position * sc;
-                if (this.roundPosition)
+                if (this.RoundPosition)
                     pos = pos.FloorCopy();
                 return Matrix.CreateScale(sc, sc, 1) * Matrix.CreateTranslation(new Vector3(pos, 0));
             }
@@ -82,9 +82,13 @@ namespace MLEM.Cameras {
         /// The viewport of this camera, based on the game's <see cref="GraphicsDevice.Viewport"/> and this camera's <see cref="ActualScale"/>
         /// </summary>
         public Vector2 ScaledViewport => new Vector2(this.Viewport.Width, this.Viewport.Height) / this.ActualScale;
+        /// <summary>
+        /// Whether the camera's <see cref="Position"/> should be rounded to full integers when calculating the <see cref="ViewMatrix"/>.
+        /// If this value is true, the occurence of rendering fragments due to floating point rounding might be reduced.
+        /// </summary>
+        public bool RoundPosition;
 
         private Rectangle Viewport => this.graphicsDevice.Viewport.Bounds;
-        private readonly bool roundPosition;
         private readonly GraphicsDevice graphicsDevice;
         private float scale = 1;
 
@@ -92,11 +96,11 @@ namespace MLEM.Cameras {
         /// Creates a new camera.
         /// </summary>
         /// <param name="graphicsDevice">The game's graphics device</param>
-        /// <param name="roundPosition">If this is true, the camera's <see cref="Position"/> and related properties will be rounded to full integers.</param>
+        /// <param name="roundPosition">Whether the camera's <see cref="Position"/> should be rounded to full integers when calculating the <see cref="ViewMatrix"/></param>
         public Camera(GraphicsDevice graphicsDevice, bool roundPosition = true) {
             this.graphicsDevice = graphicsDevice;
             this.AutoScaleReferenceSize = this.Viewport.Size;
-            this.roundPosition = roundPosition;
+            this.RoundPosition = roundPosition;
         }
 
         /// <summary>

MLEM/Misc/StaticSpriteBatch.cs

@@ -12,6 +12,10 @@ namespace MLEM.Misc {
     /// </summary>
     public class StaticSpriteBatch : IDisposable {
 
+        // this maximum is limited by indices being a short
+        private const int MaxBatchItems = short.MaxValue / 6;
+        private static readonly VertexPositionColorTexture[] Data = new VertexPositionColorTexture[MaxBatchItems * 4];
+
         /// <summary>
         /// The amount of vertices that are currently batched
         /// </summary>
@@ -63,28 +67,24 @@ namespace MLEM.Misc {
                 return;
             this.batchChanged = false;
 
-            // this maximum is limited by indices being a short
-            const int maxBatchItems = short.MaxValue / 6;
-
             // ensure we have enough vertex buffers
-            var requiredBuffers = (this.vertices.Count / (maxBatchItems * 4F)).Ceil();
+            var requiredBuffers = (this.vertices.Count / (MaxBatchItems * 4F)).Ceil();
             while (this.vertexBuffers.Count < requiredBuffers)
-                this.vertexBuffers.Add(new VertexBuffer(this.graphicsDevice, VertexPositionColorTexture.VertexDeclaration, maxBatchItems * 4, BufferUsage.WriteOnly));
+                this.vertexBuffers.Add(new VertexBuffer(this.graphicsDevice, VertexPositionColorTexture.VertexDeclaration, MaxBatchItems * 4, BufferUsage.WriteOnly));
 
             // fill vertex buffers
             var arrayIndex = 0;
             var totalIndex = 0;
-            var data = new VertexPositionColorTexture[maxBatchItems * 4];
             while (totalIndex < this.vertices.Count) {
-                var now = Math.Min(this.vertices.Count - totalIndex, data.Length);
+                var now = Math.Min(this.vertices.Count - totalIndex, Data.Length);
                 for (var i = 0; i < now; i++)
-                    data[i] = this.vertices[totalIndex + i];
-                this.vertexBuffers[arrayIndex++].SetData(data);
+                    Data[i] = this.vertices[totalIndex + i];
+                this.vertexBuffers[arrayIndex++].SetData(Data);
                 totalIndex += now;
             }
 
             // ensure we have enough indices
-            var maxItems = Math.Min(this.vertices.Count / 4, maxBatchItems);
+            var maxItems = Math.Min(this.vertices.Count / 4, MaxBatchItems);
             // each item has 2 triangles which each have 3 indices
             if (this.indices == null || this.indices.IndexCount < 6 * maxItems) {
                 var newIndices = new short[6 * maxItems];