small fixes

com.unity.cinemachine/Samples~/3D Samples/FadeOutNearbyObjects/CinemachineFadeOutShaderController.cs

@@ -0,0 +1,72 @@
+using System;
+using UnityEngine;
+
+namespace Unity.Cinemachine.Samples
+{
+    /// <summary>
+    /// An example add-on module for Cinemachine Virtual Camera for controlling
+    /// the FadeOut shader included in our example package.
+    /// </summary>
+    [ExecuteAlways]
+    public class CinemachineFadeOutShaderController : CinemachineExtension
+    {
+        /// <summary>Radius of the look at target.</summary>
+        [Tooltip("Radius of the look at target.")]
+        public float LookAtTargetRadius = 1;
+
+        [Serializable]
+        public struct FadeOutRangeSettings
+        {
+            [Tooltip("If not enabled, range will be automatically set to be between this virtual camera and LookAt target plus LookAtTargetRadius.")]
+            public bool Manual;
+
+            [Tooltip("Objects will be fully transparent at the near distance from the camera, and fully opaque at the far distance.")]
+            [MinMaxRangeSlider(0, 20)]
+            public Vector2 Range;
+        }
+
+        [EnabledProperty("Manual", "(automatic)")]
+        public FadeOutRangeSettings FadeOutRange = new () { Range = new Vector2(0, 10) };
+
+        [Tooltip("If true, MaxDistance will be set to " +
+            "distance between this virtual camera and LookAt target plus LookAtTargetRadius.")]
+        public bool MaxDistanceControlledByCamera = true;
+
+        /// <summary>Material using the FadeOut shader.</summary>
+        [Tooltip("Material using the FadeOut shader.")]
+        public Material FadeOutMaterial;
+
+        static readonly int k_MaxDistanceID = Shader.PropertyToID("_MaxDistance");
+        static readonly int k_MinDistanceID = Shader.PropertyToID("_MinDistance");
+
+        /// <summary>Updates FadeOut shader on the specified FadeOutMaterial.</summary>
+        /// <param name="vcam">The virtual camera being processed</param>
+        /// <param name="stage">The current pipeline stage</param>
+        /// <param name="state">The current virtual camera state</param>
+        /// <param name="deltaTime">The current applicable deltaTime</param>
+        protected override void PostPipelineStageCallback(
+            CinemachineVirtualCameraBase vcam,
+            CinemachineCore.Stage stage, ref CameraState state, float deltaTime)
+        {
+            if (stage == CinemachineCore.Stage.Finalize)
+            {
+                if (FadeOutMaterial == null || !FadeOutMaterial.HasProperty(k_MaxDistanceID) || !FadeOutMaterial.HasProperty(k_MinDistanceID)) 
+                    return;
+
+                var range = FadeOutRange.Range;
+                if (!FadeOutRange.Manual && vcam.LookAt != null) 
+                    range = new(0, Vector3.Distance(vcam.transform.position, vcam.LookAt.position) + LookAtTargetRadius);
+                FadeOutMaterial.SetFloat(k_MinDistanceID, range.x);
+                FadeOutMaterial.SetFloat(k_MaxDistanceID, range.y);
+            }
+        }
+
+        void OnValidate()
+        {
+            LookAtTargetRadius = Math.Max(0, LookAtTargetRadius);
+            FadeOutRange.Range.x = Math.Max(0, FadeOutRange.Range.x);
+            FadeOutRange.Range.y = Math.Max(0, FadeOutRange.Range.y);
+            FadeOutRange.Range.y = Math.Max(FadeOutRange.Range.x, FadeOutRange.Range.y);
+        }
+    }
+}