Add lightmap scale setter tool (#452)

* Add component with settable field, clamped to [0,1] range

* Get all MeshRenderers in component & children (recursively)

* Modfiy lightmap scale of all MeshRenderers

* Cleanup/comments

* Move tool to Scripts/EditorTools

* Update LightmapScaleSetter.cs

Removed the cap at 1f

Co-authored-by: Ciro Continisio <ciro@unity3d.com>

UOP1_Project/Assets/Scripts/EditorTools/LightmapScaleSetter.cs

+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class LightmapScaleSetter : MonoBehaviour
+{
+    [SerializeField] private float _lightmapScale = 1f;
+
+    // Called when the Lightmap Scale field is changed in the component editor
+    private void OnValidate()
+    {
+        // Clamp the lightmap scale to the range [0,1]
+        if (_lightmapScale < 0f)
+        {
+            _lightmapScale = 0f;
+        }
+
+        // Update lightmap scale for MeshRenderers within component and all descendants
+        MeshRenderer[] meshRenderers = GetComponentsInChildren<MeshRenderer>();
+        foreach (MeshRenderer meshRenderer in meshRenderers)
+        {
+            meshRenderer.scaleInLightmap = _lightmapScale;
+        }
+    }
+}

UOP1_Project/Assets/Scripts/EditorTools/LightmapScaleSetter.cs.meta

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