twinkle twinkle little star

Author: YueZhang1027

TerrainTest/Assets/Scenes/HexTest1.unity

@@ -39,7 +39,7 @@ RenderSettings:
   m_ReflectionIntensity: 1
   m_CustomReflection: {fileID: 0}
   m_Sun: {fileID: 0}
-  m_IndirectSpecularColor: {r: 0.14239225, g: 0.4553069, b: 0.7502265, a: 1}
+  m_IndirectSpecularColor: {r: 0.14212555, g: 0.45508352, b: 0.75003, a: 1}
   m_UseRadianceAmbientProbe: 0
 --- !u!157 &3
 LightmapSettings:
@@ -872,6 +872,50 @@ Transform:
   m_Children: []
   m_Father: {fileID: 0}
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
+--- !u!1 &1856641497
+GameObject:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  serializedVersion: 6
+  m_Component:
+  - component: {fileID: 1856641499}
+  - component: {fileID: 1856641498}
+  m_Layer: 0
+  m_Name: Sky
+  m_TagString: Untagged
+  m_Icon: {fileID: 0}
+  m_NavMeshLayer: 0
+  m_StaticEditorFlags: 0
+  m_IsActive: 1
+--- !u!114 &1856641498
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1856641497}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: cf1185f006b0116479cda2e75b68b211, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+--- !u!4 &1856641499
+Transform:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1856641497}
+  serializedVersion: 2
+  m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
+  m_LocalPosition: {x: 0, y: 0, z: 0}
+  m_LocalScale: {x: 1, y: 1, z: 1}
+  m_ConstrainProportionsScale: 0
+  m_Children: []
+  m_Father: {fileID: 0}
+  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
 --- !u!1 &1909803965
 GameObject:
   m_ObjectHideFlags: 0
@@ -935,3 +979,4 @@ SceneRoots:
   - {fileID: 365010942}
   - {fileID: 1642047805}
   - {fileID: 1033698234}
+  - {fileID: 1856641499}

TerrainTest/Assets/Scripts/SkyColorScriptableObject.cs

@@ -0,0 +1,11 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+[CreateAssetMenu(fileName = "BiomeSky", menuName = "ScriptableObjects/Biome Sky", order = 1)]
+public class SkyColorScriptableObject : ScriptableObject
+{
+    public Color skyColor;
+    public Color horizonColor;
+    public Color groundColor;
+}

TerrainTest/Assets/Scripts/SkyColorScriptableObject.cs.meta

@@ -1,19 +1,50 @@
+using System.Collections;
 using UnityEngine;
 
 [ExecuteAlways]
 public class SkyboxController : MonoBehaviour
 {
-    [SerializeField] Transform _Sun = default;
-    [SerializeField] Transform _Moon = default;
+    SkyColorScriptableObject lastSky = null;
+    SkyColorScriptableObject currSky = null;
 
-    void LateUpdate()
-    {
-        // Directions are defined to point towards the object
+    float transitTime = 3.0f;
+    float transitTimeSplit = 0.1f;
+    WaitForSeconds transitWait = new WaitForSeconds(0.1f);
 
-        // Sun
-        Shader.SetGlobalVector("_SunDir", -_Sun.transform.forward);
+    void UpdateSkyColor(SkyColorScriptableObject currSky) {
+        if (this.currSky != null) {
+            this.lastSky = this.currSky;
+            this.currSky = currSky;
 
-        // Moon
-        Shader.SetGlobalVector("_MoonDir", -_Moon.transform.forward);
+            // Start transition 
+            StartCoroutine(TransitSky());
+        }
+        else {
+            // First sky
+            this.currSky = currSky;
+
+            // Send sky color to shader
+            SendSkyColorToShader(currSky.skyColor, currSky.horizonColor, currSky.groundColor);
+        }
+    }
+
+    IEnumerator TransitSky() {
+        for (float t = 0.0f; t < transitTime; t += transitTimeSplit) { 
+            float lerp = t / transitTime;
+
+            Color skyColor = Color.Lerp(lastSky.skyColor, currSky.skyColor, lerp);
+            Color horizonColor = Color.Lerp(lastSky.horizonColor, currSky.horizonColor, lerp);
+            Color groundColor = Color.Lerp(lastSky.groundColor, currSky.groundColor, lerp);
+
+            SendSkyColorToShader(skyColor, horizonColor, groundColor);
+
+            yield return transitWait;
+        }
+    }
+
+    void SendSkyColorToShader(Color skyColor, Color horizonColor, Color GroundColor) { 
+        Shader.SetGlobalColor("_SkyColor", currSky.skyColor);
+        Shader.SetGlobalColor("_HorizonColor", currSky.horizonColor);
+        Shader.SetGlobalColor("_GroundColor", currSky.groundColor);
     }
 }