2026-04-16 오브젝트 그림자

Assets/UmbraSoftShadows/Runtime/Scripts/UmbraPointLightContactShadows.cs

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+using System.Collections.Generic;
+using UnityEngine;
+
+namespace Umbra {
+
+    [RequireComponent(typeof(Light))]
+    [ExecuteAlways]
+    [HelpURL("https://kronnect.com/docs/umbra/")]
+    public class UmbraPointLightContactShadows : MonoBehaviour {
+
+        public BoxCollider boxCollider;
+        public float fadeDistance = 1f;
+
+        public static readonly Dictionary<Light, UmbraPointLightContactShadows> umbraPointLights = new Dictionary<Light, UmbraPointLightContactShadows>();
+        Light attachedLight;
+
+
+        void OValidate () {
+            fadeDistance = Mathf.Max(fadeDistance, 0f);
+        }
+
+        private void OnEnable() {
+            attachedLight = GetComponent<Light>();
+            if (attachedLight == null) {
+                Debug.LogError("UmbraPointLightContactShadows requires a Light component on the same GameObject.");
+                return;
+            }
+
+            if (attachedLight.type != LightType.Point) {
+                Debug.LogWarning("UmbraPointLightContactShadows is designed for Point lights but found " + attachedLight.type + " light.");
+                return;
+            }
+
+            // Initialize or get the BoxCollider
+            boxCollider = GetComponent<BoxCollider>();
+            if (boxCollider == null) {
+                boxCollider = gameObject.AddComponent<BoxCollider>();
+                boxCollider.isTrigger = true;
+                boxCollider.size = Vector3.one * 20f;
+            }
+
+            umbraPointLights[attachedLight] = this;
+        }
+
+        private void OnDisable() {
+            if (attachedLight != null) {
+                umbraPointLights.Remove(attachedLight);
+            }
+        }
+
+
+        /// <summary>
+        /// Check if a world position is inside this point light's volume
+        /// </summary>
+        /// <param name="worldPosition">World space position to check</param>
+        /// <returns>True if the position is inside the volume</returns>
+        public float ComputeVolumeFade(Vector3 worldPosition) {
+            
+            if (boxCollider == null) return 0;
+
+            Bounds bounds = boxCollider.bounds;
+
+            Vector3 diff = bounds.center - worldPosition;
+            diff.x = diff.x < 0 ? -diff.x : diff.x;
+            diff.y = diff.y < 0 ? -diff.y : diff.y;
+            diff.z = diff.z < 0 ? -diff.z : diff.z;
+            Vector3 gap = diff - bounds.extents;
+            float maxDiff = gap.x > gap.y ? gap.x : gap.y;
+            maxDiff = maxDiff > gap.z ? maxDiff : gap.z;
+            return 1f - Mathf.Clamp01(maxDiff / (fadeDistance + 0.0001f));
+        }
+
+
+    }
+}