diff --git a/CloudUtils/Inc/LaserDataLoader.h b/CloudUtils/Inc/LaserDataLoader.h
index 24cee2f..6b4bbaf 100644
--- a/CloudUtils/Inc/LaserDataLoader.h
+++ b/CloudUtils/Inc/LaserDataLoader.h
@@ -3,6 +3,7 @@
 
 #include <vector>
 #include <string>
+#include <functional>
 #include "VZNL_Types.h"
 #include "VrError.h"
 
@@ -21,6 +22,15 @@ public:
 class LaserDataLoader
 {
 public:
+    // lineData is valid only while the callback is running. Copy it to retain it.
+    using LaserLineLoadCallback =
+        std::function<void(EVzResultDataType, SVzLaserLineData&)>;
+
+    // Called exactly once when loading succeeds or fails.
+    // Arguments: result, lineNum, scanSpeed, maxTimeStamp, clockPerSecond.
+    using LaserLoadFinishedCallback =
+        std::function<void(int, int, float, int, int)>;
+
     LaserDataLoader();
     ~LaserDataLoader();
 
@@ -31,6 +41,12 @@ public:
                          float& scanSpeed,
                          int& maxTimeStamp,
                          int& clockPerSecond);
+
+    // Loads one scan line at a time and immediately invokes lineCallback.
+    // finishedCallback is invoked after all lines are read or an error occurs.
+    int LoadLaserScanDataByCallback(const std::string& fileName,
+                                    const LaserLineLoadCallback& lineCallback,
+                                    const LaserLoadFinishedCallback& finishedCallback);
 
     // 保存激光扫描数据到文件 - 统一接口，支持两种类型的数据
     int SaveLaserScanData(const std::string& fileName,
@@ -98,6 +114,11 @@ private:
                                       int& maxTimeStamp,
                                       int& clockPerSecond);
 
+    int _LoadLaserScanDataFromDatFileByCallback(
+        const std::string& fileName,
+        const LaserLineLoadCallback& lineCallback,
+        const LaserLoadFinishedCallback& finishedCallback);
+
     std::string m_lastError;
     static const int VZ_LASER_LINE_PT_MAX_NUM = 4096;
 };
diff --git a/CloudUtils/Src/LaserDataLoader.cpp b/CloudUtils/Src/LaserDataLoader.cpp
index d66c23d..9843668 100644
--- a/CloudUtils/Src/LaserDataLoader.cpp
+++ b/CloudUtils/Src/LaserDataLoader.cpp
@@ -308,6 +308,198 @@ int LaserDataLoader::LoadLaserScanData(const std::string& fileName,
     inputFile.close();
     LOG_INFO("Successfully loaded %d laser scan lines from file: %s\n", lineNum, fileName.c_str());
     return SUCCESS;
+}
+
+int LaserDataLoader::LoadLaserScanDataByCallback(
+    const std::string& fileName,
+    const LaserLineLoadCallback& lineCallback,
+    const LaserLoadFinishedCallback& finishedCallback)
+{
+    LOG_INFO("Loading from file by callback: %s\n", fileName.c_str());
+    m_lastError.clear();
+
+    int lineNum = 0;
+    float scanSpeed = 0.0f;
+    int maxTimeStamp = 0;
+    int clockPerSecond = 0;
+
+    auto finish = [&](int result) -> int {
+        if (finishedCallback) {
+            finishedCallback(result, lineNum, scanSpeed, maxTimeStamp, clockPerSecond);
+        }
+        return result;
+    };
+
+    if (HasFileExtension(fileName, ".dat") && !LooksLikeTextLaserFile(fileName)) {
+        return _LoadLaserScanDataFromDatFileByCallback(fileName, lineCallback, finishedCallback);
+    }
+
+    std::ifstream inputFile(fileName);
+    if (!inputFile.is_open()) {
+        m_lastError = "Cannot open file: " + fileName;
+        LOG_ERROR("Cannot open file: %s\n", fileName.c_str());
+        return finish(ERR_CODE(FILE_ERR_NOEXIST));
+    }
+
+    EVzResultDataType dataType = keResultDataType_Invalid;
+    int result = _GetLaserType(fileName, dataType);
+    if (result != SUCCESS) {
+        m_lastError = "Cannot determine laser data type: " + fileName;
+        LOG_ERROR("%s\n", m_lastError.c_str());
+        return finish(result);
+    }
+
+    SVzLaserLineData lineData;
+    std::memset(&lineData, 0, sizeof(lineData));
+    std::unique_ptr<SVzNL3DPosition[]> positionPoints;
+    std::unique_ptr<SVzNL2DPosition[]> position2DPoints;
+    std::unique_ptr<SVzNLPointXYZRGBA[]> rgbaPoints;
+    std::unique_ptr<SVzNL2DLRPoint[]> rgba2DPoints;
+    bool hasLine = false;
+    int pointIndex = 0;
+
+    auto emitLine = [&]() -> int {
+        if (!hasLine) {
+            return SUCCESS;
+        }
+        if (pointIndex != lineData.nPointCount) {
+            std::ostringstream message;
+            message << "Laser line " << lineData.llFrameIdx << " declares "
+                    << lineData.nPointCount << " points but contains " << pointIndex;
+            m_lastError = message.str();
+            LOG_ERROR("%s\n", m_lastError.c_str());
+            return ERR_CODE(FILE_ERR_FORMAT);
+        }
+        if (lineCallback) {
+            lineCallback(dataType, lineData);
+        }
+        positionPoints.reset();
+        position2DPoints.reset();
+        rgbaPoints.reset();
+        rgba2DPoints.reset();
+        std::memset(&lineData, 0, sizeof(lineData));
+        hasLine = false;
+        pointIndex = 0;
+        return SUCCESS;
+    };
+
+    std::string line;
+    while (std::getline(inputFile, line)) {
+        TrimCarriageReturn(line);
+
+        if (line.find("LineNum:") == 0) {
+            sscanf(line.c_str(), "LineNum:%d", &lineNum);
+        } else if (line.find("ScanSpeed:") == 0) {
+            sscanf(line.c_str(), "ScanSpeed:%f", &scanSpeed);
+        } else if (line.find("MaxTimeStamp:") == 0) {
+            sscanf(line.c_str(), "MaxTimeStamp:%d_%d", &maxTimeStamp, &clockPerSecond);
+        } else if (line.find("Line_") == 0) {
+            result = emitLine();
+            if (result != SUCCESS) {
+                return finish(result);
+            }
+
+            int lineIndex = 0;
+            unsigned int timeStamp = 0;
+            int pointCount = 0;
+            if (sscanf(line.c_str(), "Line_%d_%u_%d", &lineIndex, &timeStamp, &pointCount) != 3 ||
+                pointCount < 0 || pointCount > VZ_LASER_LINE_PT_MAX_NUM) {
+                m_lastError = "Invalid laser line header: " + line;
+                LOG_ERROR("%s\n", m_lastError.c_str());
+                return finish(ERR_CODE(FILE_ERR_FORMAT));
+            }
+
+            lineData.llFrameIdx = lineIndex;
+            lineData.llTimeStamp = timeStamp;
+            lineData.nPointCount = pointCount;
+
+            if (pointCount > 0 && dataType == keResultDataType_PointXYZRGBA) {
+                rgbaPoints.reset(new (std::nothrow) SVzNLPointXYZRGBA[pointCount]);
+                rgba2DPoints.reset(new (std::nothrow) SVzNL2DLRPoint[pointCount]);
+                if (!rgbaPoints || !rgba2DPoints) {
+                    m_lastError = "Memory allocation failed while reading: " + fileName;
+                    LOG_ERROR("%s\n", m_lastError.c_str());
+                    return finish(ERR_CODE(DATA_ERR_MEM));
+                }
+                std::memset(rgbaPoints.get(), 0,
+                            sizeof(SVzNLPointXYZRGBA) * static_cast<size_t>(pointCount));
+                std::memset(rgba2DPoints.get(), 0,
+                            sizeof(SVzNL2DLRPoint) * static_cast<size_t>(pointCount));
+                lineData.p3DPoint = rgbaPoints.get();
+                lineData.p2DPoint = rgba2DPoints.get();
+            } else if (pointCount > 0 && dataType == keResultDataType_Position) {
+                positionPoints.reset(new (std::nothrow) SVzNL3DPosition[pointCount]);
+                position2DPoints.reset(new (std::nothrow) SVzNL2DPosition[pointCount]);
+                if (!positionPoints || !position2DPoints) {
+                    m_lastError = "Memory allocation failed while reading: " + fileName;
+                    LOG_ERROR("%s\n", m_lastError.c_str());
+                    return finish(ERR_CODE(DATA_ERR_MEM));
+                }
+                std::memset(positionPoints.get(), 0,
+                            sizeof(SVzNL3DPosition) * static_cast<size_t>(pointCount));
+                std::memset(position2DPoints.get(), 0,
+                            sizeof(SVzNL2DPosition) * static_cast<size_t>(pointCount));
+                lineData.p3DPoint = positionPoints.get();
+                lineData.p2DPoint = position2DPoints.get();
+            }
+            hasLine = true;
+            if (pointCount == 0) {
+                result = emitLine();
+                if (result != SUCCESS) {
+                    return finish(result);
+                }
+            }
+        } else if (line.find("Poly_") == 0) {
+            size_t lastUnderscore = line.rfind('_');
+            int polyPointCount = 0;
+            if (lastUnderscore != std::string::npos && lastUnderscore + 1 < line.size()) {
+                polyPointCount = std::atoi(line.c_str() + lastUnderscore + 1);
+            }
+            for (int skipped = 0; skipped < polyPointCount;) {
+                if (!std::getline(inputFile, line)) {
+                    break;
+                }
+                TrimCarriageReturn(line);
+                if (!line.empty()) {
+                    ++skipped;
+                }
+            }
+        } else if (line.find("{") == 0) {
+            if (!hasLine || pointIndex >= lineData.nPointCount ||
+                !lineData.p3DPoint || !lineData.p2DPoint) {
+                m_lastError = "Point data does not match laser line header: " + line;
+                LOG_ERROR("%s\n", m_lastError.c_str());
+                return finish(ERR_CODE(FILE_ERR_FORMAT));
+            }
+
+            if (dataType == keResultDataType_PointXYZRGBA) {
+                result = _ParseLaserScanPoint(line, rgbaPoints[pointIndex], rgba2DPoints[pointIndex]);
+            } else {
+                result = _ParseLaserScanPoint(line, positionPoints[pointIndex], position2DPoints[pointIndex]);
+                positionPoints[pointIndex].nPointIdx = pointIndex;
+            }
+            if (result != SUCCESS) {
+                m_lastError = "Invalid point line: " + line;
+                LOG_ERROR("%s\n", m_lastError.c_str());
+                return finish(result);
+            }
+            ++pointIndex;
+            if (pointIndex == lineData.nPointCount) {
+                result = emitLine();
+                if (result != SUCCESS) {
+                    return finish(result);
+                }
+            }
+        }
+    }
+
+    result = emitLine();
+    if (result != SUCCESS) {
+        return finish(result);
+    }
+    LOG_INFO("Successfully loaded %d laser scan lines by callback from file: %s\n",
+             lineNum, fileName.c_str());
+    return finish(SUCCESS);
 }
 
 // Read binary .dat laser scan data.
@@ -1180,6 +1372,158 @@ int LaserDataLoader::_ParseLaserScanPoint(const std::string& data, SVzNL3DPositi
     return SUCCESS;
 }
 
+int LaserDataLoader::_LoadLaserScanDataFromDatFileByCallback(
+    const std::string& fileName,
+    const LaserLineLoadCallback& lineCallback,
+    const LaserLoadFinishedCallback& finishedCallback)
+{
+    int lineNum = 0;
+    float scanSpeed = 0.0f;
+    int maxTimeStamp = 0;
+    int clockPerSecond = 0;
+
+    auto finish = [&](int result) -> int {
+        if (finishedCallback) {
+            finishedCallback(result, lineNum, scanSpeed, maxTimeStamp, clockPerSecond);
+        }
+        return result;
+    };
+
+    std::ifstream inputFile(fileName, std::ios::binary);
+    if (!inputFile.is_open()) {
+        m_lastError = "Cannot open file: " + fileName;
+        LOG_ERROR("Cannot open dat file: %s\n", fileName.c_str());
+        return finish(ERR_CODE(FILE_ERR_NOEXIST));
+    }
+
+    auto fail = [&](int code, const std::string& message) -> int {
+        m_lastError = message;
+        LOG_ERROR("%s\n", message.c_str());
+        return finish(ERR_CODE(code));
+    };
+
+    inputFile.seekg(0, std::ios::end);
+    const std::streamoff fileSize = inputFile.tellg();
+    inputFile.seekg(0, std::ios::beg);
+
+    DatLaserScan3DLinesHeader header;
+    std::memset(&header, 0, sizeof(header));
+    if (!ReadBinary(inputFile, header)) {
+        return fail(FILE_ERR_READ, "Cannot read dat header: " + fileName);
+    }
+    if (header.scanLineNum < 0 || fileSize < static_cast<std::streamoff>(sizeof(header))) {
+        return fail(FILE_ERR_FORMAT, "Invalid dat header: " + fileName);
+    }
+
+    const int featurePointSize = static_cast<int>(sizeof(Dat3DFeaturePoint));
+    auto validateLayout = [&](int lineRecordSize) -> bool {
+        std::streamoff pos = static_cast<std::streamoff>(sizeof(header));
+        inputFile.clear();
+        inputFile.seekg(pos, std::ios::beg);
+        for (int i = 0; i < header.scanLineNum; ++i) {
+            if (pos + lineRecordSize + static_cast<int>(sizeof(int)) > fileSize) {
+                return false;
+            }
+            inputFile.seekg(lineRecordSize, std::ios::cur);
+            pos += lineRecordSize;
+
+            int pointCount = 0;
+            if (!ReadBinary(inputFile, pointCount) ||
+                pointCount < 0 || pointCount > VZ_LASER_LINE_PT_MAX_NUM) {
+                return false;
+            }
+            pos += static_cast<std::streamoff>(sizeof(pointCount));
+            const std::streamoff pointBytes =
+                static_cast<std::streamoff>(pointCount) * featurePointSize;
+            if (pointBytes < 0 || pos + pointBytes > fileSize) {
+                return false;
+            }
+            inputFile.seekg(pointBytes, std::ios::cur);
+            pos += pointBytes;
+        }
+        return pos == fileSize;
+    };
+
+    int lineRecordSize = 40;
+    if (!validateLayout(lineRecordSize)) {
+        lineRecordSize = 32;
+        if (!validateLayout(lineRecordSize)) {
+            return fail(FILE_ERR_FORMAT, "Invalid dat layout: " + fileName);
+        }
+    }
+
+    lineNum = header.scanLineNum;
+    scanSpeed = static_cast<float>(header.lineV);
+    maxTimeStamp = static_cast<int>(header.maxTimeStamp);
+    clockPerSecond = header.clock;
+    inputFile.clear();
+    inputFile.seekg(static_cast<std::streamoff>(sizeof(header)), std::ios::beg);
+
+    for (int i = 0; i < lineNum; ++i) {
+        DatLineScan3DData datLine;
+        std::memset(&datLine, 0, sizeof(datLine));
+        if (!ReadDatLineRecord(inputFile, lineRecordSize, datLine)) {
+            return fail(FILE_ERR_READ, "Cannot read dat line header: " + fileName);
+        }
+
+        int pointCount = 0;
+        if (!ReadBinary(inputFile, pointCount)) {
+            return fail(FILE_ERR_READ, "Cannot read dat point count: " + fileName);
+        }
+        if (pointCount < 0 || pointCount > VZ_LASER_LINE_PT_MAX_NUM) {
+            return fail(FILE_ERR_FORMAT, "Invalid dat point count: " + fileName);
+        }
+
+        std::unique_ptr<SVzNL3DPosition[]> points3D;
+        std::unique_ptr<SVzNL2DPosition[]> points2D;
+        if (pointCount > 0) {
+            points3D.reset(new (std::nothrow) SVzNL3DPosition[pointCount]);
+            points2D.reset(new (std::nothrow) SVzNL2DPosition[pointCount]);
+            if (!points3D || !points2D) {
+                return fail(DATA_ERR_MEM, "Memory allocation failed while reading dat: " + fileName);
+            }
+            std::memset(points3D.get(), 0,
+                        sizeof(SVzNL3DPosition) * static_cast<size_t>(pointCount));
+            std::memset(points2D.get(), 0,
+                        sizeof(SVzNL2DPosition) * static_cast<size_t>(pointCount));
+        }
+
+        for (int j = 0; j < pointCount; ++j) {
+            Dat3DFeaturePoint featurePoint;
+            std::memset(&featurePoint, 0, sizeof(featurePoint));
+            if (!ReadBinary(inputFile, featurePoint)) {
+                return fail(FILE_ERR_READ, "Cannot read dat feature point: " + fileName);
+            }
+            points3D[j].nPointIdx = j;
+            points3D[j].pt3D.x = featurePoint.eye.X;
+            points3D[j].pt3D.y = featurePoint.eye.Y;
+            points3D[j].pt3D.z = featurePoint.eye.Z;
+            points2D[j].nPointIdx = j;
+            points2D[j].ptLeft2D.x = static_cast<int>(featurePoint.stereo.x);
+            points2D[j].ptLeft2D.y = static_cast<int>(featurePoint.stereo.y);
+            points2D[j].ptRight2D.x = static_cast<int>(featurePoint.stereoRight.x);
+            points2D[j].ptRight2D.y = static_cast<int>(featurePoint.stereoRight.y);
+        }
+
+        SVzLaserLineData lineData;
+        std::memset(&lineData, 0, sizeof(lineData));
+        lineData.nPointCount = pointCount;
+        lineData.dTotleOffset = datLine.lineStepping;
+        lineData.dStep = datLine.lineStepping;
+        lineData.llFrameIdx = static_cast<unsigned long long>(datLine.lineIndex);
+        lineData.llTimeStamp = static_cast<unsigned long long>(datLine.timeStamp);
+        lineData.p3DPoint = points3D.get();
+        lineData.p2DPoint = points2D.get();
+        if (lineCallback) {
+            lineCallback(keResultDataType_Position, lineData);
+        }
+    }
+
+    LOG_INFO("Successfully loaded %d dat laser scan lines by callback from file: %s\n",
+             lineNum, fileName.c_str());
+    return finish(SUCCESS);
+}
+
 int LaserDataLoader::_ParseLaserScanPoint(const std::string& data, SVzNL3DPosition& sData, SVzNL2DPositionF& s2DData)
 {
     double X = 0.0, Y = 0.0, Z = 0.0;
diff --git a/CloudView/Src/CloudViewMainWindow.cpp b/CloudView/Src/CloudViewMainWindow.cpp
index 9dd45d8..60a3c19 100644
--- a/CloudView/Src/CloudViewMainWindow.cpp
+++ b/CloudView/Src/CloudViewMainWindow.cpp
@@ -1241,7 +1241,7 @@ QWidget* CloudViewMainWindow::createViewerArea()
     QVBoxLayout* layout = new QVBoxLayout(widget);
     layout->setContentsMargins(0, 0, 0, 0);
 
-    m_glWidget = new PointCloudGLWidget(widget);
+    m_glWidget = new PointCloudGLWidget(widget, false);
     m_glWidget->setMinimumSize(400, 300);
     m_glWidget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
     layout->addWidget(m_glWidget);
diff --git a/CloudView3D/Inc/PointCloudGLWidget.h b/CloudView3D/Inc/PointCloudGLWidget.h
index f974fa4..6d69e89 100644
--- a/CloudView3D/Inc/PointCloudGLWidget.h
+++ b/CloudView3D/Inc/PointCloudGLWidget.h
@@ -7,12 +7,16 @@
 #include <QMatrix4x4>
 #include <QVector3D>
 #include <QQuaternion>
-#include <QMouseEvent>
-#include <QWheelEvent>
-#include <vector>
+#include <QMouseEvent>
+#include <QWheelEvent>
+#include <QResizeEvent>
+#include <deque>
+#include <vector>
 
 #include "CloudView3DTypes.h"
 #include "VZNL_Types.h"
+
+class QToolButton;
 
 /**
  * @brief 点云显示颜色枚举
@@ -164,13 +168,21 @@ class PointCloudGLWidget : public QOpenGLWidget, protected QOpenGLFunctions
 {
     Q_OBJECT
 
-public:
-    explicit PointCloudGLWidget(QWidget* parent = nullptr);
-    ~PointCloudGLWidget() override;
-
-    void addPointCloud(const PointCloudXYZ& cloud, const QString& name = "");
-    void addPointCloud(const PointCloudXYZRGB& cloud, const QString& name = "");
-    void clearPointClouds();
+public:
+    // Controls are enabled by default for standalone CloudView3D users.
+    // Embedders such as CloudView can disable them and provide their own UI.
+    explicit PointCloudGLWidget(QWidget* parent = nullptr);
+    PointCloudGLWidget(QWidget* parent, bool showControlButtons);
+    ~PointCloudGLWidget() override;
+
+    void setControlButtonsVisible(bool visible);
+    bool controlButtonsVisible() const { return m_showControlButtons; }
+
+    void addPointCloud(const PointCloudXYZ& cloud, const QString& name = "", bool resetView = true);
+    void addPointCloud(const PointCloudXYZRGB& cloud, const QString& name = "", bool resetView = true);
+    /** 删除最早添加的一组点云，用于维护滚动显示窗口。 */
+    bool removeOldestPointCloud();
+    void clearPointClouds();
     void setPointCloudColor(PointCloudColor color);
     void setPointSize(float size);
     void resetView();
@@ -359,7 +371,8 @@ protected:
     void mouseReleaseEvent(QMouseEvent* event) override;
     void wheelEvent(QWheelEvent* event) override;
     void mouseDoubleClickEvent(QMouseEvent* event) override;
-    void keyPressEvent(QKeyEvent* event) override;
+    void keyPressEvent(QKeyEvent* event) override;
+    void resizeEvent(QResizeEvent* event) override;
 
 private:
     struct PointCloudData
@@ -468,11 +481,13 @@ private:
     void drawBasicShapePoints();
     void drawLineSegmentList(const QVector<LineSegment>& segments);
     void drawPosePoints();       // 绘制姿态点
-    void drawAxisLabels();       // 绘制坐标轴 XYZ 标注
+    void drawAxisLabels();       // 绘制坐标轴 XYZ 标注
+    void createControlButtons();
+    void updateControlButtonGeometry();
     void uploadToVBO(PointCloudData& data);    // 上传数据到 VBO
     void releaseVBO(PointCloudData& data);     // 释放 VBO 资源
 
-    std::vector<PointCloudData> m_pointClouds;
+    std::deque<PointCloudData> m_pointClouds;
 
     QMatrix4x4 m_projection;
     QMatrix4x4 m_view;
@@ -516,6 +531,11 @@ private:
     QVector<SurfaceQuad> m_basicShapeSurfaces;
     QVector<BasicShapePoint> m_basicShapePoints;
     QVector<PosePoint> m_posePoints;
+
+    bool m_showControlButtons;
+    QWidget* m_controlPanel;
+    QToolButton* m_zoomInButton;
+    QToolButton* m_zoomOutButton;
 };
 
 #endif // POINT_CLOUD_GL_WIDGET_H
diff --git a/CloudView3D/Src/PointCloudGLWidget.cpp b/CloudView3D/Src/PointCloudGLWidget.cpp
index fb56b81..199a81c 100644
--- a/CloudView3D/Src/PointCloudGLWidget.cpp
+++ b/CloudView3D/Src/PointCloudGLWidget.cpp
@@ -1,8 +1,11 @@
 #include "PointCloudGLWidget.h"
 #include <QDebug>
 #include <QtMath>
-#include <QPainter>
-#include <cfloat>
+#include <QPainter>
+#include <QToolButton>
+#include <QHBoxLayout>
+#include <QVBoxLayout>
+#include <cfloat>
 #include <map>
 #include "VrLog.h"
 
@@ -16,8 +19,13 @@
 #include <GL/glu.h>
 #endif
 
-PointCloudGLWidget::PointCloudGLWidget(QWidget* parent)
-    : QOpenGLWidget(parent)
+PointCloudGLWidget::PointCloudGLWidget(QWidget* parent)
+    : PointCloudGLWidget(parent, true)
+{
+}
+
+PointCloudGLWidget::PointCloudGLWidget(QWidget* parent, bool showControlButtons)
+    : QOpenGLWidget(parent)
     , m_distance(100.0f)
     , m_rotationX(0.0f)
     , m_rotationY(0.0f)
@@ -35,17 +43,23 @@ PointCloudGLWidget::PointCloudGLWidget(QWidget* parent)
     , m_lineSelectMode(LineSelectMode::Vertical)
     , m_eulerRotationOrder(EulerRotationOrder::ZYX)
     , m_measureDistanceEnabled(false)
-    , m_hasListHighlightPoint(false)
-    , m_colorIndex(0)
-{
+    , m_hasListHighlightPoint(false)
+    , m_colorIndex(0)
+    , m_showControlButtons(showControlButtons)
+    , m_controlPanel(nullptr)
+    , m_zoomInButton(nullptr)
+    , m_zoomOutButton(nullptr)
+{
     setFocusPolicy(Qt::StrongFocus);
     setMouseTracking(true);
 
-    // 确保 m_model 是单位矩阵
-    m_model.setToIdentity();
-}
+    // 确保 m_model 是单位矩阵
+    m_model.setToIdentity();
+
+    createControlButtons();
+}
 
-PointCloudGLWidget::~PointCloudGLWidget()
+PointCloudGLWidget::~PointCloudGLWidget()
 {
     // 在 GL 上下文中释放所有 VBO
     makeCurrent();
@@ -113,18 +127,24 @@ void PointCloudGLWidget::initializeGL()
     glHint(GL_POINT_SMOOTH_HINT, GL_NICEST);
 }
 
-void PointCloudGLWidget::resizeGL(int w, int h)
-{
+void PointCloudGLWidget::resizeGL(int w, int h)
+{
     glViewport(0, 0, w, h);
 
     m_projection.setToIdentity();
     float aspect = static_cast<float>(w) / static_cast<float>(h > 0 ? h : 1);
     // 放大裁剪范围以容纳激光雷达点云（最大可能跨越数十万 mm）
     // near 取 1.0 保留 depth buffer 精度，far 放到 1e7 避免远点被裁掉
-    m_projection.perspective(45.0f, aspect, 1.0f, 1.0e7f);
-}
-
-void PointCloudGLWidget::paintGL()
+    m_projection.perspective(45.0f, aspect, 1.0f, 1.0e7f);
+}
+
+void PointCloudGLWidget::resizeEvent(QResizeEvent* event)
+{
+    QOpenGLWidget::resizeEvent(event);
+    updateControlButtonGeometry();
+}
+
+void PointCloudGLWidget::paintGL()
 {
     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
@@ -240,7 +260,7 @@ void PointCloudGLWidget::paintGL()
     drawAxisLabels();
 }
 
-void PointCloudGLWidget::addPointCloud(const PointCloudXYZ& cloud, const QString& name)
+void PointCloudGLWidget::addPointCloud(const PointCloudXYZ& cloud, const QString& name, bool resetViewAfterAdd)
 {
     LOG_INFO("[CloudView] addPointCloud called, cloud size: %zu\n", cloud.size());
 
@@ -326,11 +346,134 @@ void PointCloudGLWidget::addPointCloud(const PointCloudXYZ& cloud, const QString
     LOG_INFO("[CloudView] Center: (%.3f, %.3f, %.3f) Distance: %.3f\n",
              m_center.x(), m_center.y(), m_center.z(), m_distance);
 
-    resetView();
-    update();
-}
-
-void PointCloudGLWidget::addPointCloud(const PointCloudXYZRGB& cloud, const QString& name)
+    if (resetViewAfterAdd) {
+        resetView();
+    }
+    update();
+}
+
+void PointCloudGLWidget::setControlButtonsVisible(bool visible)
+{
+    m_showControlButtons = visible;
+    if (m_controlPanel) {
+        m_controlPanel->setVisible(visible);
+    }
+}
+
+void PointCloudGLWidget::createControlButtons()
+{
+    m_controlPanel = new QWidget(this);
+    m_controlPanel->setObjectName("cloudView3DControlPanel");
+    m_controlPanel->setStyleSheet(
+        "QWidget#cloudView3DControlPanel {"
+        "  background-color: rgba(40, 40, 40, 185);"
+        "  border: 1px solid rgba(130, 130, 130, 150);"
+        "  border-radius: 4px;"
+        "}"
+        "QToolButton {"
+        "  background-color: rgba(70, 70, 70, 210);"
+        "  color: white;"
+        "  border: 1px solid rgba(150, 150, 150, 120);"
+        "  border-radius: 3px;"
+        "  font-size: 10px;"
+        "}"
+        "QToolButton:hover { background-color: rgba(100, 100, 100, 230); }"
+        "QToolButton:pressed { background-color: rgba(25, 25, 25, 240); }");
+
+    QVBoxLayout* panelLayout = new QVBoxLayout(m_controlPanel);
+    panelLayout->setContentsMargins(4, 4, 4, 4);
+    panelLayout->setSpacing(3);
+
+    auto makeRow = [this, panelLayout]() {
+        QHBoxLayout* row = new QHBoxLayout();
+        row->setContentsMargins(0, 0, 0, 0);
+        row->setSpacing(2);
+        panelLayout->addLayout(row);
+        return row;
+    };
+
+    auto addButton = [this](QHBoxLayout* row, const QString& text, const QString& tooltip) {
+        QToolButton* button = new QToolButton(m_controlPanel);
+        button->setText(text);
+        button->setToolTip(tooltip);
+        button->setFixedSize(26, 24);
+        button->setAutoRaise(false);
+        row->addWidget(button);
+        return button;
+    };
+
+    struct ViewPreset {
+        const char* text;
+        const char* tooltip;
+        float rotX;
+        float rotY;
+        float rotZ;
+    };
+    const ViewPreset presets[] = {
+        {"F", "正视", 180.0f, 0.0f, 0.0f},
+        {"B", "后视", 180.0f, 180.0f, 0.0f},
+        {"L", "左视", 180.0f, 90.0f, 0.0f},
+        {"R", "右视", 180.0f, -90.0f, 0.0f},
+        {"T", "俯视", 90.0f, 0.0f, 0.0f},
+        {"D", "仰视", -90.0f, 0.0f, 0.0f},
+        {"A", "机械臂视角", -90.0f, 90.0f, 0.0f}
+    };
+
+    QHBoxLayout* viewRow = makeRow();
+    for (const ViewPreset& preset : presets) {
+        QToolButton* button = addButton(viewRow, preset.text, preset.tooltip);
+        connect(button, &QToolButton::clicked, this, [this, preset]() {
+            setViewAngles(preset.rotX, preset.rotY, preset.rotZ);
+        });
+    }
+
+    QHBoxLayout* rotateRow = makeRow();
+    auto addRotationButton = [this, &addButton, rotateRow](const QString& text,
+                                                           const QString& tooltip,
+                                                           float deltaX,
+                                                           float deltaY,
+                                                           float deltaZ) {
+        QToolButton* button = addButton(rotateRow, text, tooltip);
+        connect(button, &QToolButton::clicked, this, [this, deltaX, deltaY, deltaZ]() {
+            setViewAngles(m_rotationX + deltaX,
+                          m_rotationY + deltaY,
+                          m_rotationZ + deltaZ);
+        });
+    };
+    addRotationButton("X-", "绕 X 轴反向旋转 5 度", -5.0f, 0.0f, 0.0f);
+    addRotationButton("X+", "绕 X 轴正向旋转 5 度", 5.0f, 0.0f, 0.0f);
+    addRotationButton("Y-", "绕 Y 轴反向旋转 5 度", 0.0f, -5.0f, 0.0f);
+    addRotationButton("Y+", "绕 Y 轴正向旋转 5 度", 0.0f, 5.0f, 0.0f);
+    addRotationButton("Z-", "绕 Z 轴反向旋转 5 度", 0.0f, 0.0f, -5.0f);
+    addRotationButton("Z+", "绕 Z 轴正向旋转 5 度", 0.0f, 0.0f, 5.0f);
+
+    QToolButton* resetButton = addButton(rotateRow, "0", "重置视图");
+    connect(resetButton, &QToolButton::clicked, this, &PointCloudGLWidget::resetView);
+
+    QHBoxLayout* zoomRow = makeRow();
+    m_zoomInButton = addButton(zoomRow, "+", "放大");
+    m_zoomOutButton = addButton(zoomRow, "-", "缩小");
+    m_zoomInButton->setAutoRepeat(true);
+    m_zoomOutButton->setAutoRepeat(true);
+    connect(m_zoomInButton, &QToolButton::clicked, this, &PointCloudGLWidget::zoomIn);
+    connect(m_zoomOutButton, &QToolButton::clicked, this, &PointCloudGLWidget::zoomOut);
+    zoomRow->addStretch();
+
+    m_controlPanel->adjustSize();
+    m_controlPanel->setVisible(m_showControlButtons);
+    updateControlButtonGeometry();
+}
+
+void PointCloudGLWidget::updateControlButtonGeometry()
+{
+    if (!m_controlPanel) {
+        return;
+    }
+    m_controlPanel->move(8, 8);
+    m_controlPanel->raise();
+}
+
+void PointCloudGLWidget::addPointCloud(const PointCloudXYZRGB& cloud, const QString& name, bool resetViewAfterAdd)
 {
     if (cloud.empty()) {
         return;
@@ -436,12 +579,14 @@ void PointCloudGLWidget::addPointCloud(const PointCloudXYZRGB& cloud, const QStr
     doneCurrent();
 
     computeBoundingBox();
-    resetView();
-    update();
-}
+    if (resetViewAfterAdd) {
+        resetView();
+    }
+    update();
+}
 
-void PointCloudGLWidget::clearPointClouds()
-{
+void PointCloudGLWidget::clearPointClouds()
+{
     // 释放所有 VBO
     makeCurrent();
     for (auto& cloudData : m_pointClouds) {
@@ -462,10 +607,30 @@ void PointCloudGLWidget::clearPointClouds()
     m_center = QVector3D(0, 0, 0);
     m_colorIndex = 0;  // 重置颜色索引
     resetView();
-    update();
-}
-
-void PointCloudGLWidget::setPointCloudColor(PointCloudColor color)
+    update();
+}
+
+bool PointCloudGLWidget::removeOldestPointCloud()
+{
+    if (m_pointClouds.empty()) {
+        return false;
+    }
+
+    makeCurrent();
+    releaseVBO(m_pointClouds.front());
+    doneCurrent();
+    m_pointClouds.pop_front();
+
+    // Cloud indices change after removing the first item, so stale selection
+    // information must not be kept.
+    m_selectedPoints.clear();
+    m_selectedLine = SelectedLineInfo();
+    computeBoundingBox();
+    update();
+    return true;
+}
+
+void PointCloudGLWidget::setPointCloudColor(PointCloudColor color)
 {
     m_currentColor = color;
     update();
diff --git a/VrCommon/Inc/VrError.h b/VrCommon/Inc/VrError.h
index 5d96199..0f4fdb6 100644
--- a/VrCommon/Inc/VrError.h
+++ b/VrCommon/Inc/VrError.h
@@ -5,7 +5,7 @@
 enum ErrorCode
 {
 	SUCCESS = 0,
-	CLASS_OBJ_NULL = 1000,
+	CLASS_OBJ_NULL = 5000,
 	FUN_UNSUPPORT,
 	
 	//功能执行失败
@@ -15,7 +15,7 @@ enum ErrorCode
 
 	//相关加密内容
 	ENCRYPT_SUCCESS = 0,
-	ENCRYPT_ERROR_BASE = 1050,
+	ENCRYPT_ERROR_BASE = 5050,
 	ENCRYPT_LOAD,
 	ENCRYPT_NOT_LOAD,
 	ENCRYPT_RELEASE,
@@ -23,7 +23,7 @@ enum ErrorCode
 	ENCRYPT_ARG,
 	
 	//文件相关错误
-	FILE_ERR_EXIST = 1100,
+	FILE_ERR_EXIST = 5100,
 	FILE_ERR_NOEXIST,
 	FILE_ERR_READ,
 	FILE_ERR_WRITE,
@@ -31,7 +31,7 @@ enum ErrorCode
 	FILE_ERR_DEL,
 	
 	//共享内存错误
-	SHAREMEM_ERR_BASE = 1200,
+	SHAREMEM_ERR_BASE = 5200,
 	SHAREMEM_ERR_PARAM,           // 参数错误
 	SHAREMEM_ERR_CREATE,          // 创建失败
 	SHAREMEM_ERR_ALREADY_EXIST,   // 已存在
@@ -43,7 +43,7 @@ enum ErrorCode
 	SHAREMEM_ERR_TIMEOUT,         // 超时
 
 	//数据错误
-	DATA_ERR_LEN = 1300,
+	DATA_ERR_LEN = 5300,
 	DATA_ERR_INVALID,
 	DATA_ERR_MD5,
 	DATA_ERR_KEY,
@@ -52,7 +52,7 @@ enum ErrorCode
 
 	//网络错误
 	NET_SUCCESS = 0,
-	NET_ERR_CREAT_INIT = 1400,
+	NET_ERR_CREAT_INIT = 5400,
 	NET_ERR_CREAT_BIND,
 	NET_ERR_CREAT_LISTEN,
 	NET_ERR_CONNECT,
@@ -75,7 +75,7 @@ enum ErrorCode
 	NET_DEV_CLIENT_RECV,	//1420
 
 	// 设备类型
-	DEV_TYPE_ERR		= 1500,
+	DEV_TYPE_ERR		= 5500,
 	DEV_NOT_FIND,
     DEV_NO_OPEN,
     DEV_ID_ERR,
@@ -88,41 +88,41 @@ enum ErrorCode
     DEV_UNSUPPORT,	//1510
     DEV_ARG_INVAILD,
     DEV_BUSY,
-    DEV_CONFIG_ERR,
-    DEV_DATA_INVALID,
-    DEV_RESULT_EMPTY,	//1515
-    DEV_UNACTIVATE,		//未激活
-
-	// DroneScrew 业务错误
-	DRONESCREW_ERR_BASE = 1600,
-	DRONESCREW_ERR_INVALID_JSON,
-	DRONESCREW_ERR_UNKNOWN_CMD,
-	DRONESCREW_ERR_SINGLE_HANDLER_NOT_SET,
-	DRONESCREW_ERR_MACHINE_CODE_MISMATCH,
-	DRONESCREW_ERR_CAMERA_NOT_CONNECTED,
-	DRONESCREW_ERR_BINOCULAR_FRAME_TIMEOUT,
-	DRONESCREW_ERR_ALGO_NOT_INIT,
-	DRONESCREW_ERR_CACHED_FRAME_NOT_READY,
-	DRONESCREW_ERR_LEFT_ACQ_NOT_STARTED,
-	DRONESCREW_ERR_RIGHT_ACQ_NOT_STARTED,
-	DRONESCREW_ERR_GPIO_TRIGGER,
-	DRONESCREW_ERR_SINGLE_BUSY,
-	DRONESCREW_ERR_MODE_CONFLICT,
-	DRONESCREW_ERR_DETECT_CONFIG_LEFT,
-	DRONESCREW_ERR_DETECT_CONFIG_RIGHT,
-	DRONESCREW_ERR_DETECT_START_LEFT,
-	DRONESCREW_ERR_DETECT_START_RIGHT,
-	DRONESCREW_ERR_LIVE_CONFIG_LEFT,
-	DRONESCREW_ERR_LIVE_START_LEFT,
-	DRONESCREW_ERR_RTSP_INIT,
-	DRONESCREW_ERR_RTSP_START,
-	DRONESCREW_ERR_ZMQ_HANDLER_NOT_SET,
-	DRONESCREW_ERR_UDP_DISCOVERY,
-	DRONESCREW_ERR_RESPONSE_NOT_OK,
-	DRONESCREW_ERR_GPIO_EXPORT,
-	DRONESCREW_ERR_GPIO_DIRECTION,
-	DRONESCREW_ERR_GPIO_VALUE,
-};
+    DEV_CONFIG_ERR,
+    DEV_DATA_INVALID,
+    DEV_RESULT_EMPTY,	//1515
+    DEV_UNACTIVATE,		//未激活
+
+	// DroneScrew 业务错误
+	DRONESCREW_ERR_BASE = 5600,
+	DRONESCREW_ERR_INVALID_JSON,
+	DRONESCREW_ERR_UNKNOWN_CMD,
+	DRONESCREW_ERR_SINGLE_HANDLER_NOT_SET,
+	DRONESCREW_ERR_MACHINE_CODE_MISMATCH,
+	DRONESCREW_ERR_CAMERA_NOT_CONNECTED,
+	DRONESCREW_ERR_BINOCULAR_FRAME_TIMEOUT,
+	DRONESCREW_ERR_ALGO_NOT_INIT,
+	DRONESCREW_ERR_CACHED_FRAME_NOT_READY,
+	DRONESCREW_ERR_LEFT_ACQ_NOT_STARTED,
+	DRONESCREW_ERR_RIGHT_ACQ_NOT_STARTED,
+	DRONESCREW_ERR_GPIO_TRIGGER,
+	DRONESCREW_ERR_SINGLE_BUSY,
+	DRONESCREW_ERR_MODE_CONFLICT,
+	DRONESCREW_ERR_DETECT_CONFIG_LEFT,
+	DRONESCREW_ERR_DETECT_CONFIG_RIGHT,
+	DRONESCREW_ERR_DETECT_START_LEFT,
+	DRONESCREW_ERR_DETECT_START_RIGHT,
+	DRONESCREW_ERR_LIVE_CONFIG_LEFT,
+	DRONESCREW_ERR_LIVE_START_LEFT,
+	DRONESCREW_ERR_RTSP_INIT,
+	DRONESCREW_ERR_RTSP_START,
+	DRONESCREW_ERR_ZMQ_HANDLER_NOT_SET,
+	DRONESCREW_ERR_UDP_DISCOVERY,
+	DRONESCREW_ERR_RESPONSE_NOT_OK,
+	DRONESCREW_ERR_GPIO_EXPORT,
+	DRONESCREW_ERR_GPIO_DIRECTION,
+	DRONESCREW_ERR_GPIO_VALUE,
+};
 
 #define ERR_CODE(nCode) -std::abs((int)nCode)
 #define ERR_CODE_RETURN(nCode) do{ if(SUCCESS != (nCode)) return ERR_CODE(nCode); }while(0)