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Runtime/Cloner/Fields/LinearField.cs

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+using Unity.Mathematics;
+using UnityEngine;
+
+namespace Misaki.ArtTool
+{
+    [ExecuteInEditMode]
+    public class LinearField : FieldBase
+    {
+        public float length = 1.0f;
+
+        private float3 fieldForward;
+        private float3 fieldPosition;
+
+        public override void Initialize()
+        {
+            fieldForward = transform.forward;
+            fieldPosition = transform.position;
+        }
+
+        public override float Operate(float3 position)
+        {
+            var plane = new Unity.Mathematics.Geometry.Plane(fieldForward, fieldPosition);
+            var distance = plane.SignedDistanceToPoint(position) / length;
+            var weight = math.saturate(distance / 2.0f + 0.5f);
+
+            weight = Remapping(weight);
+
+            return weight;
+        }
+
+        private void OnDrawGizmos()
+        {
+            Gizmos.matrix = transform.localToWorldMatrix;
+
+            var end = Vector3.forward * length;
+            var start = Vector3.forward * -length;
+
+            Gizmos.DrawLine(start, end);
+            var right = Quaternion.LookRotation(Vector3.forward) * Quaternion.Euler(0.0f, 180.0f + 30.0f, 0.0f) * Vector3.forward;
+            var left = Quaternion.LookRotation(Vector3.forward) * Quaternion.Euler(0.0f, 180.0f - 30.0f, 0.0f) * Vector3.forward;
+
+            Gizmos.DrawLine(end, end + right * 0.5f);
+            Gizmos.DrawLine(end, end + left * 0.5f);
+
+            Gizmos.DrawWireCube(end, Vector3.one);
+            Gizmos.DrawWireCube(start, Vector3.one);
+        }
+    }
+}