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Src/Unity/Scripts/Physics/GetClosePointFromCollider.cs

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+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using UnityEngine;
+
+namespace BITKit.Physics
+{
+    public class GetClosePointFromCollider : IClosePointProvider
+    {
+        public string Name="Default";
+        public Transform Transform;
+        public Vector3 Offset = default;
+        public LayerMask LayerMask=LayerMask.NameToLayer("Default");
+        public float Distance=1.6f;
+        public float MinHeight=0.32f;
+        public float MaxHeight = 1f;
+
+        private readonly Collider[] _colliders=new Collider[8];
+        private readonly Collider[] _mainCollider=new Collider[8];
+
+        public GetClosePointFromCollider(Transform transform)
+        {
+            Transform = transform;
+        }
+
+        public bool TryGetValue(out Vector3 position, out Collider collider)
+        {
+            Vector3 vector3 = default;
+            StringBuilder reportBuilder = new();
+            reportBuilder.AppendLine($"检测任务:{Name}");
+            position = Transform.position + Transform.rotation * Offset;
+            var detectedLength = UnityEngine.Physics.OverlapSphereNonAlloc(position, Distance, _mainCollider, LayerMask);
+            reportBuilder.AppendLine($"检测到了{detectedLength}个碰撞体");
+
+            foreach (var collider1 in _mainCollider.Take(detectedLength).OrderBy(ByTop).Reverse())
+                //for (var i = 0; i <detectedLength ; i++)
+            {
+                //reportBuilder.AppendLine($"----------------------------检测到了碰撞体{_mainCollider[i].name}");
+                //var collider =  _mainCollider[i];
+                if (collider1.isTrigger)
+                {
+                    reportBuilder?.AppendLine("碰撞体是触发器");
+                    continue;
+                }
+
+                switch (collider1)
+                {
+                    case MeshCollider meshCollider:
+                        if (meshCollider.convex is false)
+                        {
+                            reportBuilder?.AppendLine("MeshCollider未勾选Convex");
+                            continue;
+                        }
+
+                        break;
+                }
+
+                var bounds = collider1.bounds;
+                vector3 = collider1.ClosestPoint(Transform.position + Vector3.up * 64);
+                var top = bounds.center.y + bounds.extents.y;
+                Debug.DrawLine(Transform.position, Transform.position + Vector3.up * top, Color.blue, 8f);
+                if (Transform.position.y + MinHeight > top)
+                {
+                    reportBuilder?.AppendLine("高度不足");
+                    continue;
+                }
+
+                var nextPos = position;
+                nextPos.y = collider1.bounds.center.y;
+
+                {
+                    var ray = new Ray(nextPos, Transform.forward);
+                    if (collider1.Raycast(new Ray(nextPos, Transform.forward), out _, Distance) is false)
+                    {
+                        reportBuilder?.AppendLine("未检测到前方");
+                        Debug.DrawRay(ray.origin,ray.direction,Color.red,Distance);
+                        continue;
+                    }
+                }
+              
+
+                var height = Mathf.Abs(top - Transform.position.y);
+                if (height > MaxHeight)
+                {
+                    reportBuilder?.AppendLine($"高度差距过大:{height}");
+                    continue;
+                }
+
+                if (UnityEngine.Physics.Linecast(Transform.position, vector3, out var raycastHit2, LayerMask))
+                {
+                    if (raycastHit2.collider != collider1)
+                    {
+                        reportBuilder?.AppendLine($"检测到了其他碰撞体:{raycastHit2.transform.name}");
+                        continue;
+                    }
+                }
+                var length = UnityEngine.Physics.OverlapSphereNonAlloc(vector3, 0.01f, _colliders, LayerMask);
+                switch (length)
+                {
+                    case 1:
+                        if (_colliders[0] != collider1)
+                        {
+                            reportBuilder.AppendLine($"检测到了其他碰撞体{_colliders[0].name}");
+                            continue;
+                        }
+
+                        break;
+                    case > 1:
+                        reportBuilder.AppendLine("检测到了更多碰撞体");
+                        for (var ii = 0; ii < length; ii++)
+                        {
+                            //Debug.DrawLine(vector3, _colliders[ii].ClosestPoint(vector3), Color.red, 8);
+                            reportBuilder.AppendLine($"\t{_colliders[ii].name}");
+                        }
+
+                        continue;
+                }
+
+                vector3.y = top;
+                position = vector3;
+
+                collider = collider1;
+
+                reportBuilder.AppendLine("<color=green>成功</color>");
+                //BIT4Log.Log<GetClosePointFromCollider>(reportBuilder.ToString());
+                return true;
+            }
+
+            collider = null;
+            //BIT4Log.Log<GetClosePointFromCollider>(reportBuilder.ToString());
+            return false;
+        }
+        private float ByTop(Collider arg)
+        {
+            return arg.bounds.center.y + arg.bounds.extents.y;
+        }
+    }
+}
+