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Assets/Mirror/Examples/_Common/Scripts/PerlinNoise.cs

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+using UnityEngine;
+using UnityEditor;
+
+namespace Mirror.Examples.Common.Controllers.Player
+{
+    [ExecuteInEditMode]
+    [AddComponentMenu("")]
+    public class PerlinNoise : MonoBehaviour
+    {
+        public float scale = 20f;
+        public float heightMultiplier = .03f;
+        public float offsetX = 5f;
+        public float offsetY = 5f;
+
+        [ContextMenu("Generate Terrain")]
+        void GenerateTerrain()
+        {
+            Terrain terrain = GetComponent<Terrain>();
+            if (terrain == null)
+            {
+                Debug.LogError("No Terrain component found on this GameObject.");
+                return;
+            }
+#if UNITY_EDITOR
+            Undo.RecordObject(terrain, "Generate Perlin Noise Terrain");
+#endif
+            terrain.terrainData = GenerateTerrainData(terrain.terrainData);
+        }
+
+        TerrainData GenerateTerrainData(TerrainData terrainData)
+        {
+            int width = terrainData.heightmapResolution;
+            int height = terrainData.heightmapResolution;
+
+            float[,] heights = new float[width, height];
+
+            for (int x = 0; x < width; x++)
+            {
+                for (int y = 0; y < height; y++)
+                {
+                    float xCoord = (float)x / width * scale + offsetX;
+                    float yCoord = (float)y / height * scale + offsetY;
+
+                    heights[x, y] = Mathf.PerlinNoise(xCoord, yCoord) * heightMultiplier;
+                }
+            }
+
+            terrainData.SetHeights(0, 0, heights);
+            return terrainData;
+        }
+    }
+}