LiRuochen_WorkFlow/ScreenDetectionLayerPicker
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使用rthandle代替texture管理，避免绘制后读不出来东西的情况出现

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lrss3
2026-06-08 10:13:44 +08:00
parent 630a624ff7
commit a30542f85d
1 changed files with 103 additions and 99 deletions
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Runtime/MeshDetection_URP/GeoLayerPickerRenderPassFeature.cs
+103 -99
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@@ -3,6 +3,7 @@ using UnityEngine.Rendering;
using UnityEngine.Rendering.Universal;
using System.Collections.Generic;
using Unity.Collections;
using UnityEngine.Experimental.Rendering;
using XericLibrary.Runtime.MacroLibrary;
#if UNITY_2022_1_OR_NEWER
@@ -26,34 +27,24 @@ namespace XericLibrary.PostProcess
[System.Serializable]
public struct PickedGeoData
{
/// <summary> 材质/SubMesh 的唯一 ID，0 表示背景 </summary>
public int matID;
/// <summary> 该像素点对应的世界坐标 </summary>
public Vector3 worldPos;
/// <summary> 是否拾取到了有效的地质层 </summary>
public bool isValid;
}
/// <summary>
/// 地质层拾取 RenderFeature。
/// 负责在 URP 管线中注入自定义 RenderPass，管理模型，并自动在后台降频读取、解码 GPU 数据。
/// </summary>
public class GeoLayerPickerRenderPassFeature : ScriptableRendererFeature
{
#region 静态单例与外部管理 API
/// <summary>
/// 当前激活的 Feature 实例
/// </summary>
public static GeoLayerPickerRenderPassFeature Instance { get; private set; }
private readonly List<MeshFilter> m_GeoMeshes = new List<MeshFilter>();
private readonly List<SubMeshDrawData> m_DrawList = new List<SubMeshDrawData>();
private bool m_IsDirty = true;
/// <summary> 添加需要检查的场景模型对象 </summary>
public void AddGeoMesh(MeshFilter meshFilter)
{
if (meshFilter != null && !m_GeoMeshes.Contains(meshFilter))
@@ -63,7 +54,6 @@ namespace XericLibrary.PostProcess
}
}
/// <summary> 批量添加需要检查的场景模型对象 </summary>
public void AddGeoMeshes(IEnumerable<MeshFilter> meshFilters)
{
if (meshFilters == null) return;
@@ -77,13 +67,11 @@ namespace XericLibrary.PostProcess
}
}
/// <summary> 移除指定的场景模型对象 </summary>
public void RemoveGeoMesh(MeshFilter meshFilter)
{
if (m_GeoMeshes.Remove(meshFilter)) m_IsDirty = true;
}
/// <summary> 清空所有已添加的场景模型对象 </summary>
public void ClearGeoMeshes()
{
if (m_GeoMeshes.Count > 0)
@@ -93,30 +81,21 @@ namespace XericLibrary.PostProcess
}
}
/// <summary> 获取当前所有已添加的场景模型对象（只读） </summary>
public IReadOnlyList<MeshFilter> GetGeoMeshes() => m_GeoMeshes;
#endregion
#region 数据访问 API (供外部 UI 或逻辑调用)
#region 数据访问 API
// 内部维护的解码后的数据数组 (大小等于 pickRTSize.x * pickRTSize.y)
private PickedGeoData[] m_DecodedDataArray;
private int m_ValidDataCount = 0;
/// <summary>
/// 获取当前帧已解码的拾取数据数组。
/// 数组按行优先排列 (Index = y * width + x)。
/// </summary>
public IReadOnlyList<PickedGeoData> GetDecodedData() => m_DecodedDataArray;
/// <summary>
/// 获取一列的数据
/// </summary>
/// <param name="column"></param>
/// <param name="listData"></param>
public void GetColumnData(int column, List<PickedGeoData> listData)
{
listData.Clear();
if (m_DecodedDataArray == null) return;
column = MacroMath.ClampToInt(column, 0, pickRTSize.x);
for (int i = 0; i < pickRTSize.y; i++)
{
@@ -124,87 +103,85 @@ namespace XericLibrary.PostProcess
}
}
/// <summary>
/// 根据归一化的屏幕坐标 (0~1) 获取拾取数据。
/// 会自动映射到 sampleRect 和 pickRTSize 范围内。
/// </summary>
/// <param name="normalizedScreenPos">归一化屏幕坐标 (左下角为 0,0)</param>
/// <param name="data">输出的拾取数据</param>
/// <returns>是否成功获取（坐标是否在采样区域内）</returns>
public bool TryGetPickedData(Vector2 normalizedScreenPos, out PickedGeoData data)
{
data = default;
if (m_DecodedDataArray == null || m_DecodedDataArray.Length == 0) return false;
// 1. 将屏幕坐标转换为相对于 sampleRect 的局部坐标 (0~1)
float localX = (normalizedScreenPos.x - sampleRect.x) / sampleRect.width;
float localY = (normalizedScreenPos.y - sampleRect.y) / sampleRect.height;
// 2. 检查是否超出了采样区域
if (localX < 0f || localX > 1f || localY < 0f || localY > 1f) return false;
// 3. 映射到 RT 的像素坐标
int pixelX = Mathf.Clamp(Mathf.FloorToInt(localX * pickRTSize.x), 0, pickRTSize.x - 1);
int pixelY = Mathf.Clamp(Mathf.FloorToInt(localY * pickRTSize.y), 0, pickRTSize.y - 1);
// 4. 获取数据
int index = pixelY * pickRTSize.x + pixelX;
if (index < 0 || index >= m_DecodedDataArray.Length) return false;
data = m_DecodedDataArray[index];
return true;
}
public void ForceReadbackSync()
{
// 修复：使用 m_ReadbackBufferHandle 进行同步等待
if (m_ReadbackBufferHandle != null)
{
AsyncGPUReadback.WaitAllRequests();
}
}
#endregion
#region Inspector 配置参数
[Header("拾取材质与尺寸")] [Tooltip("用于渲染地质层 ID 和坐标的 HDR 材质球")]
[Header("拾取材质与尺寸")]
public Material pickMaterial;
[Tooltip("渲染目标纹理的尺寸，越小性能越好（例如 64x64）")]
public Vector2Int pickRTSize = new Vector2Int(64, 64);
[Header("采样区域设置")] [Tooltip("定义屏幕上的采样区域 (归一化坐标 0~1)。\n例如: X=0.25, Y=0.25, W=0.5, H=0.5 表示只渲染屏幕正中间一半的区域。")]
[Header("采样区域设置")]
public Rect sampleRect = new Rect(0f, 0f, 1f, 1f);
[Header("读取频率控制")] [Tooltip("每隔多少秒从 GPU 读取一次数据 (例如 0.1 秒 = 10 FPS)")] [Range(0.01f, 1.0f)]
[Header("读取频率控制")]
[Range(0.01f, 1.0f)]
public float readbackInterval = 0.1f;
[Header("调试设置")]
public bool enableDebugLog = false;
#endregion
private RenderTexture m_PickRT;
// 核心修改：全面使用 RTHandle 替代 RenderTexture
private RTHandle m_PickRTHandle;
private RTHandle m_ReadbackBufferHandle;
private float m_TimeSinceLastReadback = 0f;
private bool m_IsReadbackInProgress = false;
private int m_ReadbackFrameCounter = 0;
/// <summary>
/// 自定义 RenderPass
/// </summary>
class CustomRenderPass : ScriptableRenderPass
{
public Material passMaterial;
public RenderTexture passRT;
public RTHandle passRTHandle;
public RTHandle passReadbackBuffer;
public List<SubMeshDrawData> passDrawList;
public Rect passSampleRect;
public bool requestReadback; // 标记本帧是否需要触发异步读取
public bool requestReadback;
private int m_MatIDProperty = Shader.PropertyToID("_MatID");
public override void OnCameraSetup(CommandBuffer cmd, ref RenderingData renderingData)
{
if (passRT != null)
{
ConfigureTarget(new RenderTargetIdentifier(passRT));
// 清屏为 0,0,0,0 (背景 ID 为 0)
ConfigureClear(ClearFlag.All, Color.clear);
}
}
public override void Execute(ScriptableRenderContext context, ref RenderingData renderingData)
{
if (passMaterial == null || passRT == null || passDrawList == null || passDrawList.Count == 0)
if (passMaterial == null || passRTHandle == null || passDrawList == null || passDrawList.Count == 0)
return;
CommandBuffer cmd = CommandBufferPool.Get("GeoLayerPickBuffer");
// 手动设置渲染目标并清理，避免 URP 隐式状态干扰
cmd.SetRenderTarget(passRTHandle);
cmd.ClearRenderTarget(true, true, Color.clear);
Camera cam = renderingData.cameraData.camera;
Matrix4x4 viewMatrix = cam.worldToCameraMatrix;
Matrix4x4 projMatrix = cam.projectionMatrix;
@@ -226,7 +203,7 @@ namespace XericLibrary.PostProcess
projMatrix = GL.GetGPUProjectionMatrix(projMatrix, true);
cmd.SetViewProjectionMatrices(viewMatrix, projMatrix);
cmd.SetViewport(new Rect(0, 0, passRT.width, passRT.height));
cmd.SetViewport(new Rect(0, 0, passRTHandle.rt.width, passRTHandle.rt.height));
for (int i = 0; i < passDrawList.Count; i++)
{
@@ -236,20 +213,23 @@ namespace XericLibrary.PostProcess
}
cmd.SetViewProjectionMatrices(viewMatrix, renderingData.cameraData.GetProjectionMatrix());
// 如果本帧需要回读，将数据安全地 Blit 到隔离缓冲区
if (requestReadback && passReadbackBuffer != null)
{
cmd.Blit(passRTHandle, passReadbackBuffer);
}
context.ExecuteCommandBuffer(cmd);
CommandBufferPool.Release(cmd);
// 【核心】：如果计时器到了，在这里发起异步 GPU 回读
if (requestReadback)
// 在 CommandBuffer 执行后，发起回读请求（读取隔离缓冲区）
if (requestReadback && passReadbackBuffer != null)
{
AsyncGPUReadback.Request(passRT, 0, TextureFormat.RGBAFloat,
AsyncGPUReadback.Request(passReadbackBuffer.rt, 0, TextureFormat.RGBAFloat,
GeoLayerPickerRenderPassFeature.Instance.OnReadbackComplete);
}
}
public override void OnCameraCleanup(CommandBuffer cmd)
{
}
}
private CustomRenderPass m_ScriptablePass;
@@ -264,15 +244,31 @@ namespace XericLibrary.PostProcess
renderPassEvent = RenderPassEvent.AfterRenderingOpaques
};
if (m_PickRT != null) m_PickRT.Release();
m_PickRT = new RenderTexture(pickRTSize.x, pickRTSize.y, 0, RenderTextureFormat.ARGBFloat)
{
filterMode = FilterMode.Point
};
m_PickRT.Create();
// 释放旧的 RTHandle
if (m_PickRTHandle != null) { m_PickRTHandle.Release(); m_PickRTHandle = null; }
if (m_ReadbackBufferHandle != null) { m_ReadbackBufferHandle.Release(); m_ReadbackBufferHandle = null; }
// 初始化解码数组
m_DecodedDataArray = new PickedGeoData[pickRTSize.x * pickRTSize.y];
// 分配新的 RTHandle
m_PickRTHandle = RTHandles.Alloc(
pickRTSize.x, pickRTSize.y,
colorFormat: GraphicsFormat.R32G32B32A32_SFloat,
filterMode: FilterMode.Point,
name: "GeoLayerPickRT"
);
m_ReadbackBufferHandle = RTHandles.Alloc(
pickRTSize.x, pickRTSize.y,
colorFormat: GraphicsFormat.R32G32B32A32_SFloat,
filterMode: FilterMode.Point,
name: "GeoLayerReadbackBuffer"
);
int requiredLength = pickRTSize.x * pickRTSize.y;
if (m_DecodedDataArray == null || m_DecodedDataArray.Length != requiredLength)
{
m_DecodedDataArray = new PickedGeoData[requiredLength];
if(enableDebugLog) Debug.Log($"[GeoLayerPicker] 数组重新初始化，长度: {requiredLength}");
}
}
public override void AddRenderPasses(ScriptableRenderer renderer, ref RenderingData renderingData)
@@ -283,27 +279,32 @@ namespace XericLibrary.PostProcess
{
RebuildDrawList();
m_IsDirty = false;
if(enableDebugLog) Debug.Log($"[GeoLayerPicker] DrawList 重建完成，包含 {m_DrawList.Count} 个 SubMesh。");
}
// 降频计时器逻辑
m_TimeSinceLastReadback += Time.deltaTime;
if (m_IsReadbackInProgress && m_TimeSinceLastReadback > 1.0f)
m_ReadbackFrameCounter++;
if (m_IsReadbackInProgress && m_ReadbackFrameCounter > 60)
{
Debug.LogWarning("[GeoLayerPicker] AsyncGPUReadback 超时，强制重置状态。");
Debug.LogWarning("[GeoLayerPicker] AsyncGPUReadback 疑似卡死，强制重置并清理队列。");
AsyncGPUReadback.WaitAllRequests();
m_IsReadbackInProgress = false;
m_ReadbackFrameCounter = 0;
}
m_TimeSinceLastReadback += Time.deltaTime;
bool shouldRead = false;
if (m_TimeSinceLastReadback >= readbackInterval && !m_IsReadbackInProgress)
{
m_TimeSinceLastReadback = 0f;
m_IsReadbackInProgress = true;
m_ReadbackFrameCounter = 0;
shouldRead = true;
}
m_ScriptablePass.passMaterial = pickMaterial;
m_ScriptablePass.passRT = m_PickRT;
m_ScriptablePass.passRTHandle = m_PickRTHandle;
m_ScriptablePass.passReadbackBuffer = m_ReadbackBufferHandle;
m_ScriptablePass.passDrawList = m_DrawList;
m_ScriptablePass.passSampleRect = sampleRect;
m_ScriptablePass.requestReadback = shouldRead;
@@ -311,9 +312,6 @@ namespace XericLibrary.PostProcess
renderer.EnqueuePass(m_ScriptablePass);
}
/// <summary>
/// 异步回读完成回调 (在后台线程或主线程延迟执行，不阻塞渲染)
/// </summary>
private void OnReadbackComplete(AsyncGPUReadbackRequest request)
{
m_IsReadbackInProgress = false;
@@ -324,33 +322,25 @@ namespace XericLibrary.PostProcess
return;
}
// 【核心修复】：使用 GetData<Color> 获取数据
var rawData = request.GetData<Color>();
if (rawData.Length == 0) return;
int width = m_PickRT.width;
int height = m_PickRT.height;
// 【核心修复】：不要依赖 rawData.Length 作为遍历上限，
// 而是以我们目标数组 m_DecodedDataArray 的长度为准！
// 修复：使用 m_ReadbackBufferHandle.rt 获取宽高
int width = m_ReadbackBufferHandle.rt.width;
int height = m_ReadbackBufferHandle.rt.height;
int count = m_DecodedDataArray.Length;
// DirectX 平台下，异步回读的 Y 轴是翻转的
bool flipY = SystemInfo.graphicsUVStartsAtTop;
m_ValidDataCount = 0;
for (int i = 0; i < count; i++)
{
// 计算目标像素的坐标
int x = i % width;
int y = i / width;
// 处理 DirectX 的 Y 轴翻转
int sourceY = flipY ? (height - 1 - y) : y;
// 计算源数据在 rawData 中的真实索引
int sourceIndex = sourceY * width + x;
// 【安全防线】：防止源索引超出 rawData 的实际物理长度
if (sourceIndex < 0 || sourceIndex >= rawData.Length)
{
m_DecodedDataArray[i] = new PickedGeoData { isValid = false };
@@ -359,9 +349,7 @@ namespace XericLibrary.PostProcess
Color pixel = rawData[sourceIndex];
// 你的 Shader 输出是 float4(worldPos.xyz, matID)
// 在标准 RGBA 映射下，A 通道就是 ID
if (pixel.a > 0.1f)
if (pixel.a > 0.5f)
{
m_DecodedDataArray[i] = new PickedGeoData
{
@@ -369,12 +357,18 @@ namespace XericLibrary.PostProcess
matID = Mathf.RoundToInt(pixel.a),
worldPos = new Vector3(pixel.r, pixel.g, pixel.b)
};
m_ValidDataCount++;
}
else
{
m_DecodedDataArray[i] = new PickedGeoData { isValid = false, matID = 0 };
}
}
if (enableDebugLog)
{
Debug.Log($"[GeoLayerPicker] 回读完成！总像素: {count}, 有效拾取像素: {m_ValidDataCount}");
}
}
private void RebuildDrawList()
@@ -400,7 +394,17 @@ namespace XericLibrary.PostProcess
protected override void Dispose(bool disposing)
{
if (m_PickRT != null && m_PickRT.IsCreated()) m_PickRT.Release();
// 修复：正确释放 RTHandle 并置空
if (m_PickRTHandle != null)
{
m_PickRTHandle.Release();
m_PickRTHandle = null;
}
if (m_ReadbackBufferHandle != null)
{
m_ReadbackBufferHandle.Release();
m_ReadbackBufferHandle = null;
}
if (Instance == this) Instance = null;
}
}