From ad66f824eed1e640d215f39a8237f5d0ff2fea55 Mon Sep 17 00:00:00 2001
From: Timo Eberl <timo@timoeberl.de>
Date: Sun, 29 Sep 2024 22:29:56 +0200
Subject: [PATCH] Serialize LOD distances

---
 Assets/Scripts/GrassField.cs | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/Assets/Scripts/GrassField.cs b/Assets/Scripts/GrassField.cs
index a04281a..4ee5b4a 100644
--- a/Assets/Scripts/GrassField.cs
+++ b/Assets/Scripts/GrassField.cs
@@ -16,10 +16,12 @@ public class GrassField : MonoBehaviour {
     [Range(0f, 1f)] public float densityLOD0 = 1f;
     public bool enableShadowsLOD0 = true;
     [Header("LOD 1")]
+    public float distanceLOD1 = 7.5f;
     public Material grassMaterialLOD1;
     [Range(0f, 1f)] public float densityLOD1 = 0.5f;
     public bool enableShadowsLOD1 = true;
     [Header("LOD 2")]
+    public float distanceLOD2 = 7.5f + Mathf.Sqrt(2 * ((100f / 10f) * (100f / 10f))) + 5f;
     public Material grassMaterialLOD2;
     [Range(0f, 1f)] public float densityLOD2 = 0.2f;
     public bool enableShadowsLOD2 = false;
@@ -43,6 +45,11 @@ public class GrassField : MonoBehaviour {
     }
 
     private void OnEnable() {
+        var minDistLOD2 = distanceLOD1 + Mathf.Sqrt( 2 * Mathf.Pow( (float)size / numChunks, 2f ) );
+        if (distanceLOD2 < minDistLOD2) {
+            Debug.LogWarning("It is recommended that minDistLOD2 is greater than " + minDistLOD2 + ".");
+        }
+        
         if (_chunks.Length != numChunks * numChunks) {
             Debug.LogError(this.name + ": Existing chunks does not match numChunks.");
             gameObject.SetActive(false);
@@ -76,10 +83,10 @@ public class GrassField : MonoBehaviour {
             var localCamPos = camPos - chunkPos; // cam position relative to chunk
 
             var sqrCamDist = bounds.SqrDistance(localCamPos);
-            if (sqrCamDist > 15f * 15f) {
+            if (sqrCamDist > distanceLOD2 * distanceLOD2) {
                 _chunks[x + y * numChunks].LOD = 2;
             }
-            else if (sqrCamDist > 7.5f * 7.5f) {
+            else if (sqrCamDist > distanceLOD1 * distanceLOD1) {
                 _chunks[x + y * numChunks].LOD = 1;
             }
             else {
@@ -199,8 +206,15 @@ public class GrassField : MonoBehaviour {
             // draw a circle instead of a sphere
             Gizmos.matrix = Matrix4x4.TRS(Vector3.zero, Quaternion.identity, new Vector3(1f, 0.001f, 1f));
         }
-        Gizmos.color = new Color(1.0f, 0.0f, 1f, 2f);
-        Gizmos.DrawWireSphere(center, 7.5f);
+        
+        Gizmos.color = new Color(1.0f, 0.0f, 1.0f, 1f);
+        Gizmos.DrawWireSphere(center, distanceLOD1);
+        Gizmos.DrawWireSphere(center, distanceLOD2);
+        
+        Gizmos.color = new Color(1.0f, 1.0f, 0.0f, 1f);
+        var minDistLOD2 = distanceLOD1 + Mathf.Sqrt( 2 * Mathf.Pow( (float)size / numChunks, 2f ) );
+        Gizmos.DrawWireSphere(center, minDistLOD2);
+        
         Gizmos.matrix = oldMatrix;
     }
 }