Rename RaylibUtils.cs to Raylib.Utils

now a partial class

Raylib-cs/Raylib.Utils.cs

@@ -0,0 +1,88 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace Raylib_cs
+{
+    /// <summary>
+    /// Utility functions for parts of the api that are not easy to interact with via pinvoke.
+    /// </summary>
+    public static unsafe partial class Raylib
+    {
+        public static string SubText(this string input, int position, int length)
+        {
+            return input.Substring(position, Math.Min(length, input.Length));
+        }
+
+        public static string[] GetDroppedFiles()
+        {
+            int count;
+            var buffer = GetDroppedFiles(&count);
+            var files = new string[count];
+
+            for (var i = 0; i < count; i++)
+            {
+                files[i] = Marshal.PtrToStringUTF8((IntPtr)buffer[i]);
+            }
+
+            ClearDroppedFiles();
+
+            return files;
+        }
+
+        public static Material GetMaterial(ref Model model, int materialIndex)
+        {
+            return model.materials[materialIndex];
+        }
+
+        public static Texture2D GetMaterialTexture(ref Model model, int materialIndex, MaterialMapIndex mapIndex)
+        {
+            return model.materials[materialIndex].maps[(int)mapIndex].texture;
+        }
+
+        public static void SetMaterialTexture(ref Model model, int materialIndex, MaterialMapIndex mapIndex, ref Texture2D texture)
+        {
+            SetMaterialTexture(ref model.materials[materialIndex], (int)mapIndex, texture);
+        }
+
+        public static void SetMaterialShader(ref Model model, int materialIndex, ref Shader shader)
+        {
+            model.materials[materialIndex].shader = shader;
+        }
+
+        public static void SetShaderValueV<T>(Shader shader, int uniformLoc, T[] values, ShaderUniformDataType uniformType, int count)
+        where T : unmanaged
+        {
+            SetShaderValueV(shader, uniformLoc, (Span<T>)values, uniformType, count);
+        }
+
+        public static void SetShaderValueV<T>(Shader shader, int uniformLoc, Span<T> values, ShaderUniformDataType uniformType, int count)
+        where T : unmanaged
+        {
+            fixed (T* valuePtr = values)
+            {
+                SetShaderValueV(shader, uniformLoc, valuePtr, uniformType, count);
+            }
+        }
+
+        public static void SetShaderValue<T>(Shader shader, int uniformLoc, T value, ShaderUniformDataType uniformType)
+        where T : unmanaged
+        {
+            SetShaderValue(shader, uniformLoc, &value, uniformType);
+        }
+
+        public static void SetShaderValue<T>(Shader shader, int uniformLoc, T[] values, ShaderUniformDataType uniformType)
+        where T : unmanaged
+        {
+            SetShaderValue(shader, uniformLoc, (Span<T>)values, uniformType);
+        }
+
+        public static void SetShaderValue<T>(Shader shader, int uniformLoc, Span<T> values, ShaderUniformDataType uniformType)
+        where T : unmanaged
+        {
+            fixed (T* valuePtr = values)
+            {
+                SetShaderValue(shader, uniformLoc, valuePtr, uniformType);
+            }
+        }
+    }
+}