Reorganize types

- Move into types folder
- Group types based on usage

Raylib-cs/types/Material.cs

@@ -0,0 +1,89 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace Raylib_cs
+{
+    /// <summary>Material map index</summary>
+    public enum MaterialMapIndex
+    {
+        /// <summary>
+        /// MAP_DIFFUSE
+        /// </summary>
+        MATERIAL_MAP_ALBEDO = 0,
+
+        /// <summary>
+        /// MAP_SPECULAR
+        /// </summary>
+        MATERIAL_MAP_METALNESS = 1,
+
+        MATERIAL_MAP_NORMAL = 2,
+        MATERIAL_MAP_ROUGHNESS = 3,
+        MATERIAL_MAP_OCCLUSION,
+        MATERIAL_MAP_EMISSION,
+        MATERIAL_MAP_HEIGHT,
+
+        /// <summary>
+        /// NOTE: Uses GL_TEXTURE_CUBE_MAP
+        /// </summary>
+        MATERIAL_MAP_CUBEMAP,
+
+        /// <summary>
+        /// NOTE: Uses GL_TEXTURE_CUBE_MAP
+        /// </summary>
+        MATERIAL_MAP_IRRADIANCE,
+
+        /// <summary>
+        /// NOTE: Uses GL_TEXTURE_CUBE_MAP
+        /// </summary>
+        MATERIAL_MAP_PREFILTER,
+
+        MATERIAL_MAP_BRDF,
+
+        MATERIAL_MAP_DIFFUSE = MATERIAL_MAP_ALBEDO,
+        MATERIAL_MAP_SPECULAR = MATERIAL_MAP_METALNESS,
+    }
+
+    /// <summary>
+    /// Material texture map
+    /// </summary>
+    [StructLayout(LayoutKind.Sequential)]
+    public struct MaterialMap
+    {
+        /// <summary>
+        /// Material map texture
+        /// </summary>
+        public Texture2D texture;
+
+        /// <summary>
+        /// Material map color
+        /// </summary>
+        public Color color;
+
+        /// <summary>
+        /// Material map value
+        /// </summary>
+        public float value;
+    }
+
+    /// <summary>
+    /// Material type (generic)
+    /// </summary>
+    [StructLayout(LayoutKind.Sequential)]
+    public struct Material
+    {
+        /// <summary>
+        /// Material shader
+        /// </summary>
+        public Shader shader;
+
+        /// <summary>
+        /// Material maps (MaterialMap *)
+        /// </summary>
+        public IntPtr maps;
+
+        /// <summary>
+        /// Material generic parameters (if required, float *)
+        /// </summary>
+        public IntPtr param;
+    }
+}