riversong code showcase

Source/Riversong/Game/World/Terrain/TerrainShaderDebugGUI.cs

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+using UnityEngine;
+using UnityEngine.InputSystem;
+
+namespace DanieleMarotta.RiversongCodeShowcase
+{
+    public class TerrainShaderDebugGUI : MonoBehaviour
+    {
+        private const int GUIRectWidth = 500;
+
+        private bool _drawGUI;
+
+        public Texture2D BlockedTilesMaskTexture { get; set; }
+
+        public Texture2D CliffsMaskTexture { get; set; }
+
+        public static TerrainShaderDebugGUI Create()
+        {
+            return new GameObject(nameof(TerrainShaderDebugGUI)).AddComponent<TerrainShaderDebugGUI>();
+        }
+
+        private void Update()
+        {
+            if (Keyboard.current.f1Key.wasPressedThisFrame) _drawGUI = !_drawGUI;
+        }
+
+        private void OnGUI()
+        {
+            if (!_drawGUI) return;
+
+            GUI.color = new Color(1, 1, 1, 0.8f);
+
+            var x = 0;
+            DrawTexture(BlockedTilesMaskTexture, ref x);
+            DrawTexture(CliffsMaskTexture, ref x);
+        }
+
+        private void DrawTexture(Texture2D texture, ref int x)
+        {
+            const int spacing = 10;
+
+            var oldFilterMode = texture.filterMode;
+            texture.filterMode = FilterMode.Point;
+
+            var aspect = (float)texture.height / texture.width;
+            GUI.DrawTexture(new Rect(spacing + x, spacing, GUIRectWidth, GUIRectWidth * aspect), texture, ScaleMode.ScaleToFit, false);
+
+            texture.filterMode = oldFilterMode;
+
+            x += GUIRectWidth + spacing;
+        }
+    }
+}