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Runtime/Cloner/Fields/SphereField.cs

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+using Unity.Mathematics;
+using UnityEngine;
+
+namespace Misaki.ArtTool
+{
+    public class SphereField : FieldBase
+    {
+        public float radius = 1.0f;
+
+        private float3 fieldPosition;
+
+        public override void Initialize()
+        {
+            fieldPosition = transform.position;
+        }
+
+        public override float Operate(float3 position)
+        {
+            var weight = ShapeHelper.Linear01DistanceToSphereCenter(position, fieldPosition, radius);
+            weight = Remapping(weight);
+
+            return weight;
+        }
+
+        private void OnDrawGizmos()
+        {
+            Gizmos.color = Color.cyan;
+            Gizmos.DrawWireSphere(fieldPosition, radius);
+        }
+    }
+}