重写地面物品shader 和 摆放工具

unity/Assets/2.5D Engine/Shaders/Custom_NewSurfaceShader.mat

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unity/Assets/Editor/GroundClipTool.cs

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+using UnityEngine;
+using UnityEditor;
+
+/// <summary>
+/// 地面裁剪工具 - 给Sprite应用带地面裁剪的Shader
+/// </summary>
+public class GroundClipTool : Editor
+{
+    [MenuItem("Tools/Shader/应用地面裁剪Shader")]
+    public static void ApplyGroundClipShader()
+    {
+        if (Selection.gameObjects.Length == 0)
+        {
+            EditorUtility.DisplayDialog("提示", "请先选择物体", "确定");
+            return;
+        }
+
+        // 加载Shader
+        Shader shader = Shader.Find("Custom/SpriteWithGroundClip");
+        if (shader == null)
+        {
+            EditorUtility.DisplayDialog("错误", "找不到Shader: Custom/SpriteWithGroundClip\n请检查Shader文件是否存在", "确定");
+            return;
+        }
+
+        int count = 0;
+        foreach (GameObject go in Selection.gameObjects)
+        {
+            SpriteRenderer sr = go.GetComponentInChildren<SpriteRenderer>();
+            if (sr == null)
+            {
+                Debug.LogWarning($"跳过 {go.name} - 没有SpriteRenderer");
+                continue;
+            }
+
+            // 创建Material
+            Material mat = new Material(shader);
+            mat.name = $"{go.name}_GroundClipMat";
+            
+            // 设置默认值
+            mat.SetFloat("_GroundHeight", 0f);
+            mat.SetFloat("_EnableClip", 1f);
+            mat.SetFloat("_ClipSoftness", 0.05f);
+            mat.SetColor("_Color", Color.white);
+
+            // 应用Material
+            sr.material = mat;
+
+            // 保存Material为Asset
+            string path = $"Assets/Materials/{mat.name}.mat";
+            if (!System.IO.Directory.Exists("Assets/Materials"))
+            {
+                System.IO.Directory.CreateDirectory("Assets/Materials");
+            }
+            
+            AssetDatabase.CreateAsset(mat, path);
+            
+            EditorUtility.SetDirty(go);
+            count++;
+            Debug.Log($"✓ 已应用地面裁剪Shader到 {go.name}");
+        }
+
+        AssetDatabase.SaveAssets();
+        AssetDatabase.Refresh();
+
+        if (count > 0)
+        {
+            EditorUtility.DisplayDialog("完成", $"已给 {count} 个物体应用地面裁剪Shader\n\n请在Inspector中调整Ground Height参数", "确定");
+        }
+    }
+
+    [MenuItem("Tools/Shader/设置地面高度（批量）")]
+    public static void SetGroundHeightBatch()
+    {
+        string input = EditorInputDialog.Show("设置地面高度", "请输入地面Y坐标:", "0");
+        
+        if (input == null) return;
+        if (!float.TryParse(input, out float groundHeight))
+        {
+            EditorUtility.DisplayDialog("错误", "请输入有效的数字", "确定");
+            return;
+        }
+
+        int count = 0;
+        foreach (GameObject go in Selection.gameObjects)
+        {
+            SpriteRenderer sr = go.GetComponentInChildren<SpriteRenderer>();
+            if (sr == null || sr.material == null) continue;
+
+            if (sr.material.shader.name == "Custom/SpriteWithGroundClip")
+            {
+                sr.material.SetFloat("_GroundHeight", groundHeight);
+                EditorUtility.SetDirty(go);
+                count++;
+            }
+        }
+
+        if (count > 0)
+        {
+            EditorUtility.DisplayDialog("完成", $"已设置 {count} 个物体的地面高度为 {groundHeight}", "确定");
+        }
+    }
+}

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unity/Assets/Light/shaders/SpriteWithGroundClip.shader

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+Shader "Custom/SpriteWithGroundClip"
+{
+    // 带地面裁剪的Sprite Shader
+    // 当Sprite的世界Y坐标低于地面高度时，会被裁剪掉
+    Properties
+    {
+        _MainTex ("Texture", 2D) = "white" {}
+        _GroundHeight ("地面高度 (Y坐标)", Float) = 0.0
+        [MaterialToggle] _EnableClip ("启用裁剪", Float) = 1.0
+        _ClipSoftness ("裁剪边缘柔和度", Range(0, 0.5)) = 0.05
+        
+        // 颜色
+        _Color ("颜色", Color) = (1, 1, 1, 1)
+    }
+    SubShader
+    {
+        Tags
+        {
+            "RenderPipeline" = "UniversalPipeline"
+            "Queue" = "Transparent"
+            "RenderType" = "Transparent"
+        }
+        
+        Blend SrcAlpha OneMinusSrcAlpha
+        ZWrite Off
+        Cull Off
+
+        Pass
+        {
+            Name "SpriteWithGroundClip"
+            
+            HLSLPROGRAM
+            #pragma vertex vert
+            #pragma fragment frag
+            #pragma multi_compile_instancing
+
+            #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
+
+            struct Attributes
+            {
+                float4 positionOS : POSITION;
+                float2 uv : TEXCOORD0;
+                float4 color : COLOR;
+                UNITY_VERTEX_INPUT_INSTANCE_ID
+            };
+
+            struct Varyings
+            {
+                float4 positionCS : SV_POSITION;
+                float2 uv : TEXCOORD0;
+                float4 color : COLOR;
+                float3 worldPos : TEXCOORD1;
+                UNITY_VERTEX_INPUT_INSTANCE_ID
+            };
+
+            CBUFFER_START(UnityPerMaterial)
+                float4 _MainTex_ST;
+                float4 _Color;
+                float _GroundHeight;
+                float _EnableClip;
+                float _ClipSoftness;
+            CBUFFER_END
+
+            TEXTURE2D(_MainTex);
+            SAMPLER(sampler_MainTex);
+
+            Varyings vert(Attributes input)
+            {
+                Varyings output;
+                UNITY_SETUP_INSTANCE_ID(input);
+                UNITY_TRANSFER_INSTANCE_ID(input, output);
+
+                output.positionCS = TransformObjectToHClip(input.positionOS.xyz);
+                output.uv = TRANSFORM_TEX(input.uv, _MainTex);
+                output.color = input.color;
+                output.worldPos = TransformObjectToWorld(input.positionOS.xyz);
+                return output;
+            }
+
+            half4 frag(Varyings input) : SV_Target
+            {
+                UNITY_SETUP_INSTANCE_ID(input);
+
+                // 采样纹理
+                half4 texColor = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, input.uv);
+                half4 color = texColor * input.color * _Color;
+
+                // 地面裁剪逻辑
+                if (_EnableClip > 0.5)
+                {
+                    float worldY = input.worldPos.y;
+                    float distanceToGround = worldY - _GroundHeight;
+                    
+                    // 如果在地面以下，裁剪掉
+                    if (distanceToGround < 0)
+                    {
+                        // 使用柔和边缘
+                        float alpha = smoothstep(0, _ClipSoftness, distanceToGround);
+                        color.a *= alpha;
+                        
+                        // 如果Alpha太小，直接丢弃
+                        if (color.a < 0.01)
+                        {
+                            discard;
+                        }
+                    }
+                }
+
+                return color;
+            }
+            ENDHLSL
+        }
+    }
+    FallBack "Sprites/Default"
+}

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+  - {fileID: 2100000, guid: 3853ad0a70c1ce9438158ab506926470, type: 2}
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unity/Assets/Scenes/res/prefab/grass3.prefab

@@ -56,7 +56,7 @@ SpriteRenderer:
   m_RenderingLayerMask: 1
   m_RendererPriority: 0
   m_Materials:
-  - {fileID: -876546973899608171, guid: be3236dea9f1e304da1a5e3a513dad5e, type: 3}
+  - {fileID: 2100000, guid: 38f27d079a4bba24e8d5d7807754e2f1, type: 2}
   m_StaticBatchInfo:
     firstSubMesh: 0
     subMeshCount: 0

unity/Assets/Scenes/res/prefab/groot1.prefab

@@ -56,7 +56,7 @@ SpriteRenderer:
   m_RenderingLayerMask: 1
   m_RendererPriority: 0
   m_Materials:
-  - {fileID: -876546973899608171, guid: be3236dea9f1e304da1a5e3a513dad5e, type: 3}
+  - {fileID: 2100000, guid: 7e83fed090241814ba92c7abd1f59f8d, type: 2}
   m_StaticBatchInfo:
     firstSubMesh: 0
     subMeshCount: 0

unity/Assets/Scenes/res/prefab/mountain1.prefab

@@ -56,7 +56,7 @@ SpriteRenderer:
   m_RenderingLayerMask: 1
   m_RendererPriority: 0
   m_Materials:
-  - {fileID: -876546973899608171, guid: be3236dea9f1e304da1a5e3a513dad5e, type: 3}
+  - {fileID: 2100000, guid: 5400c3be20ac36a49aedb2291c39b7dc, type: 2}
   m_StaticBatchInfo:
     firstSubMesh: 0
     subMeshCount: 0

unity/Assets/Scenes/res/prefab/stone1.prefab

@@ -56,7 +56,7 @@ SpriteRenderer:
   m_RenderingLayerMask: 1
   m_RendererPriority: 0
   m_Materials:
-  - {fileID: -876546973899608171, guid: be3236dea9f1e304da1a5e3a513dad5e, type: 3}
+  - {fileID: 2100000, guid: abc467885ee174c47aae3d695359de4e, type: 2}
   m_StaticBatchInfo:
     firstSubMesh: 0
     subMeshCount: 0

unity/Assets/Scenes/res/prefab/stone2.prefab

@@ -56,7 +56,7 @@ SpriteRenderer:
   m_RenderingLayerMask: 1
   m_RendererPriority: 0
   m_Materials:
-  - {fileID: -876546973899608171, guid: be3236dea9f1e304da1a5e3a513dad5e, type: 3}
+  - {fileID: 2100000, guid: 54e4eac17f0020f4b951a02f0c93df17, type: 2}
   m_StaticBatchInfo:
     firstSubMesh: 0
     subMeshCount: 0

unity/Assets/Scenes/res/prefab/stone3.prefab

@@ -56,7 +56,7 @@ SpriteRenderer:
   m_RenderingLayerMask: 1
   m_RendererPriority: 0
   m_Materials:
-  - {fileID: -876546973899608171, guid: be3236dea9f1e304da1a5e3a513dad5e, type: 3}
+  - {fileID: 2100000, guid: 1a227532e0c91d84f86a31ca241dda26, type: 2}
   m_StaticBatchInfo:
     firstSubMesh: 0
     subMeshCount: 0

unity/Assets/Scenes/res/prefab/tree1.prefab

@@ -56,7 +56,7 @@ SpriteRenderer:
   m_RenderingLayerMask: 1
   m_RendererPriority: 0
   m_Materials:
-  - {fileID: -876546973899608171, guid: be3236dea9f1e304da1a5e3a513dad5e, type: 3}
+  - {fileID: 2100000, guid: a4b1195ceab10a446bfd6385fd7ef182, type: 2}
   m_StaticBatchInfo:
     firstSubMesh: 0
     subMeshCount: 0

unity/Assets/Scenes/res/prefab/tree2.prefab

@@ -56,7 +56,7 @@ SpriteRenderer:
   m_RenderingLayerMask: 1
   m_RendererPriority: 0
   m_Materials:
-  - {fileID: -876546973899608171, guid: be3236dea9f1e304da1a5e3a513dad5e, type: 3}
+  - {fileID: 2100000, guid: 954b3914ad29bf54eb821cdfa31b0c94, type: 2}
   m_StaticBatchInfo:
     firstSubMesh: 0
     subMeshCount: 0

unity/Assets/Scenes/res/prefab/tree3.prefab

@@ -56,7 +56,7 @@ SpriteRenderer:
   m_RenderingLayerMask: 1
   m_RendererPriority: 0
   m_Materials:
-  - {fileID: -876546973899608171, guid: be3236dea9f1e304da1a5e3a513dad5e, type: 3}
+  - {fileID: 2100000, guid: 05a14e14f4b25704c83976629cc57e99, type: 2}
   m_StaticBatchInfo:
     firstSubMesh: 0
     subMeshCount: 0

unity/Assets/Scenes/res/prefab/tree4.prefab

@@ -56,7 +56,7 @@ SpriteRenderer:
   m_RenderingLayerMask: 1
   m_RendererPriority: 0
   m_Materials:
-  - {fileID: -876546973899608171, guid: be3236dea9f1e304da1a5e3a513dad5e, type: 3}
+  - {fileID: 2100000, guid: 03d72d52aaa4137449ac6706a549c0dc, type: 2}
   m_StaticBatchInfo:
     firstSubMesh: 0
     subMeshCount: 0

unity/Assets/Scenes/res/prefab/tree5.prefab

@@ -56,7 +56,7 @@ SpriteRenderer:
   m_RenderingLayerMask: 1
   m_RendererPriority: 0
   m_Materials:
-  - {fileID: -876546973899608171, guid: be3236dea9f1e304da1a5e3a513dad5e, type: 3}
+  - {fileID: 2100000, guid: abf013ed9ac4aee41848a097a813c8aa, type: 2}
   m_StaticBatchInfo:
     firstSubMesh: 0
     subMeshCount: 0

unity/Assets/Scenes/res/prefab/tree6.prefab

@@ -56,7 +56,7 @@ SpriteRenderer:
   m_RenderingLayerMask: 1
   m_RendererPriority: 0
   m_Materials:
-  - {fileID: -876546973899608171, guid: be3236dea9f1e304da1a5e3a513dad5e, type: 3}
+  - {fileID: 2100000, guid: 08d65ca7aff5d8744b10b23607255130, type: 2}
   m_StaticBatchInfo:
     firstSubMesh: 0
     subMeshCount: 0

unity/Assets/camera/YSorter.cs

@@ -54,9 +54,12 @@ public class YSorter : MonoBehaviour
 
     private void UpdateSortingOrder()
     {
-        // 直接使用Z坐标作为排序依据
+        // 使用物体中心（transform.position）的Z坐标作为排序依据
+        // 这样物品中心在地面上方时，会正确遮挡地面
+        float sortZ = transform.position.z;
+        
         // Z值越大（离相机越远），sortingOrder越大
-        int sortingOrder = baseSortingOrder + Mathf.RoundToInt(transform.position.z * scaleFactor);
+        int sortingOrder = baseSortingOrder + Mathf.RoundToInt(sortZ * scaleFactor);
         
         if (_spriteRenderer.sortingOrder != sortingOrder)
         {

unity/UserSettings/EditorUserSettings.asset

@@ -15,14 +15,14 @@ EditorUserSettings:
       value: 50025251565751035a5b0a7b44250944144f4e7d7d787336782a4a37b6b7606f
       flags: 0
     RecentlyUsedSceneGuid-3:
-      value: 5055070050010c5a0e5d0d27497a0e441016412c2f7d206178714f61b3b8326b
-      flags: 0
-    RecentlyUsedSceneGuid-4:
       value: 5004505e50045a0e5f57097b14250f444615407b287b7e657f704c31b5b36660
       flags: 0
-    RecentlyUsedSceneGuid-5:
+    RecentlyUsedSceneGuid-4:
       value: 5b090d000402580a5c5b087648735e4445151e737b717334757b1832b1b93261
       flags: 0
+    RecentlyUsedSceneGuid-5:
+      value: 5055070050010c5a0e5d0d27497a0e441016412c2f7d206178714f61b3b8326b
+      flags: 0
     RecentlyUsedSceneGuid-6:
       value: 5a5757560101590a5d0c0e24427b5d44434e4c7a7b7a23677f2b4565b7b5353a
       flags: 0