Create GameViewGridOverlay.cs

Author: unitycoder

Assets/Scripts/Editor/Tools/GameViewGridOverlay.cs

@@ -0,0 +1,45 @@
+// draws grid lines in the game view (useful for seeing the resolution of ui elements in the game view)
+// usage: attach to a game object in the scene, set gameobject tag to "EditorOnly" to remove from builds
+
+using UnityEngine;
+
+namespace UnityLibrary.EditorTools
+{
+    [ExecuteAlways]
+    public class GameViewGridOverlay : MonoBehaviour
+    {
+#if UNITY_EDITOR
+        public bool drawGrid = true;
+
+        public int gridSpacingX = 64;
+        public int gridSpacingY = 64;
+
+        public int startOffsetX = 0;
+        public int startOffsetY = 0;
+
+        public Color gridColor = new Color(1f, 1f, 1f, 0.5f);
+
+        private void OnGUI()
+        {
+            if (!drawGrid || Application.isPlaying) return;
+
+            Color oldColor = GUI.color;
+            GUI.color = gridColor;
+
+            // Horizontal lines
+            for (int y = startOffsetX; y < Screen.height; y += gridSpacingY)
+            {
+                GUI.DrawTexture(new Rect(0, y, Screen.width, 1), Texture2D.whiteTexture);
+            }
+
+            // Vertical lines
+            for (int x = startOffsetY; x < Screen.width; x += gridSpacingX)
+            {
+                GUI.DrawTexture(new Rect(x, 0, 1, Screen.height), Texture2D.whiteTexture);
+            }
+
+            GUI.color = oldColor;
+        }
+#endif
+    }
+}