UI material + environment change

Made-with: Cursor

Assets/UIRoundedSprite.cs

@@ -0,0 +1,40 @@
+using UnityEngine;
+
+/// <summary>
+/// Shared utility for creating a rounded-rectangle sprite used by UI panels and buttons.
+/// </summary>
+public static class UIRoundedSprite
+{
+    private static Sprite _roundedRectSprite;
+
+    /// <summary>
+    /// Returns a cached white rounded-rectangle sprite (9-slice friendly, scales well).
+    /// </summary>
+    public static Sprite GetRoundedRectSprite()
+    {
+        if (_roundedRectSprite != null)
+            return _roundedRectSprite;
+
+        const int size = 64;
+        const int radius = 12;
+        var tex = new Texture2D(size, size);
+        var pixels = new Color32[size * size];
+        float r = radius - 0.5f;
+        for (int y = 0; y < size; y++)
+        for (int x = 0; x < size; x++)
+        {
+            float dx = x < r ? r - x : (x >= size - r ? x - (size - 1 - r) : 0);
+            float dy = y < r ? r - y : (y >= size - r ? y - (size - 1 - r) : 0);
+            float d = Mathf.Sqrt(dx * dx + dy * dy);
+            byte a = (byte)Mathf.Clamp(Mathf.RoundToInt(255 * (1f - Mathf.Clamp01((d - r) / 1.5f))), 0, 255);
+            pixels[y * size + x] = new Color32(255, 255, 255, a);
+        }
+        tex.SetPixels32(pixels);
+        tex.Apply(true, true);
+        tex.filterMode = FilterMode.Bilinear;
+        // Border for 9-slice: keeps corners fixed so they don't stretch on tall/wide panels
+        var border = new Vector4(radius, radius, radius, radius);
+        _roundedRectSprite = Sprite.Create(tex, new Rect(0, 0, size, size), new Vector2(0.5f, 0.5f), 100f, 0, SpriteMeshType.FullRect, border);
+        return _roundedRectSprite;
+    }
+}