src/app/TileBasemap.cpp

@@ -8,7 +8,6 @@
 #include <QDebug>
 #include <QImage>
 #include <QNetworkReply>
-#include <QTimer>
 #include <QNetworkRequest>
 #include <QString>
 #include <QUrl>
@@ -108,10 +107,19 @@ long long TileBasemap::tileKey(int z, int x, int y) {
 
 TileBasemap::TileBasemap(geopro::render::Scene& scene, vtkRenderWindow* rw,
                          std::shared_ptr<geopro::core::GeoLocalFrame> frame, QObject* parent)
-    : QObject(parent), scene_(scene), rw_(rw), frame_(std::move(frame)) {
+    : QObject(parent), scene_(scene), rw_(rw), frame_(std::move(frame)) {}
-    refreshTimer_ = new QTimer(this);
+
-    refreshTimer_->setSingleShot(true);
+void TileBasemap::requestRender() {
-    connect(refreshTimer_, &QTimer::timeout, this, [this]() { refresh(); });
+    // 合并渲染：同一事件循环轮次内的多次请求只渲染一帧（标准做法，避免逐瓦片重复 Render 卡顿）。
+    if (renderPending_) return;
+    renderPending_ = true;
+    QMetaObject::invokeMethod(
+        this,
+        [this]() {
+            renderPending_ = false;
+            if (rw_) rw_->Render();
+        },
+        Qt::QueuedConnection);
 }
 
 TileBasemap::~TileBasemap() {
@@ -133,8 +141,7 @@ void TileBasemap::ensureObserver() {
 }
 
 void TileBasemap::onInteractionEnd(vtkObject*, unsigned long, void* clientData, void*) {
-    // 防抖：交互(滚轮/旋转/平移)停止 ~140ms 后才刷新四叉树，避免每格事件都重算卡顿。
+    if (auto* self = static_cast<TileBasemap*>(clientData)) self->refresh();
-    if (auto* self = static_cast<TileBasemap*>(clientData)) self->refreshTimer_->start(140);
 }
 
 void TileBasemap::enqueueGet(const QString& url, std::function<void(QNetworkReply*)> onDone) {
@@ -172,7 +179,7 @@ void TileBasemap::show(Kind kind) {
     terrainProbed_ = false;
     kind_ = kind;
     if (kind == Hidden) {
-        if (rw_) rw_->Render();
+        requestRender();
         return;
     }
     refresh();  // 四叉树覆盖：近细远粗一次铺满（含远处粗块，无需单独粗底层）
@@ -266,7 +273,7 @@ void TileBasemap::refresh() {
 
     purgeStale();
     ren->ResetCameraClippingRange();  // 交互后扩裁剪面以含新载入的底图瓦片(防被"蒙版"切)
-    if (rw_) rw_->Render();
+    requestRender();
     refreshing_ = false;
 }
 
@@ -284,7 +291,7 @@ void TileBasemap::purgeStale() {
             ++it;
         }
     }
-    if (removed && rw_) rw_->Render();
+    if (removed) requestRender();
 }
 
 void TileBasemap::fetchTile(int z, int x, int y, long long key) {
@@ -299,7 +306,7 @@ void TileBasemap::fetchTile(int z, int x, int y, long long key) {
             placeActor(key, buildFlat(z, x, y, tex));
             inFlight_.erase(key);
             purgeStale();
-            if (rw_) rw_->Render();
+            requestRender();
         }
         return;
     }
@@ -331,7 +338,7 @@ void TileBasemap::fetchTile(int z, int x, int y, long long key) {
         if (!ok) {
             inFlight_.erase(key);
             purgeStale();
-            if (rw_) rw_->Render();
+            requestRender();
             return;
         }
         auto tex = makeTexture(img);
@@ -343,7 +350,7 @@ void TileBasemap::fetchTile(int z, int x, int y, long long key) {
             placeActor(key, buildFlat(z, x, y, tex));  // 街道图无地形 → 直接平面
             inFlight_.erase(key);
             purgeStale();
-            if (rw_) rw_->Render();
+            requestRender();
         }
     });
 }
@@ -410,7 +417,7 @@ void TileBasemap::fetchTerrain(int z, int x, int y, long long key, vtkSmartPoint
         }
         inFlight_.erase(key);
         purgeStale();
-        if (rw_) rw_->Render();
+        requestRender();
     };
 
     // 命中缓存：同一祖先 DEM 块的多个瓦片瞬间起伏，免重复网络。
@@ -439,7 +446,7 @@ void TileBasemap::fetchTerrain(int z, int x, int y, long long key, vtkSmartPoint
             desired_.find(key) == desired_.end() || placed_.count(key)) {
             inFlight_.erase(key);  // 过期/移出视野 → 不落地
             purgeStale();
-            if (rw_) rw_->Render();
+            requestRender();
             return;
         }
         QImage dem;

src/app/TileBasemap.hpp

@@ -20,7 +20,6 @@ class vtkRenderWindow;
 class vtkInteractorObserver;
 class vtkCallbackCommand;
 class QNetworkReply;
-class QTimer;
 namespace geopro::render { class Scene; }
 namespace geopro::core { class GeoLocalFrame; }
 
@@ -43,6 +42,7 @@ public:
 private:
     static long long tileKey(int z, int x, int y);
     void ensureObserver();  // 首次显示时挂到交互样式的 EndInteractionEvent
+    void requestRender();   // 合并渲染：同一事件循环轮次多次请求只渲染一帧
     void purgeStale();      // 本轮请求全部落地后再删旧层瓦片，避免缩放空白闪烁
     // 四叉树细分：按瓦片投影屏幕尺寸递归(近细远粗)，收集叶瓦片到 out。
     void refineTile(int z, int x, int y, std::set<long long>& out, int& count);
@@ -85,7 +85,7 @@ private:
     bool terrainProbed_ = false;                           // 首次 fetchTerrain 打一行诊断日志
     vtkSmartPointer<vtkInteractorObserver> styleObs_;       // 持引用保证回调期有效
     vtkSmartPointer<vtkCallbackCommand> observer_;
-    QTimer* refreshTimer_ = nullptr;  // 交互防抖：滚轮/旋转停止后才刷新四叉树(避免每格卡)
+    bool renderPending_ = false;  // 合并渲染：同轮多次请求只渲染一帧
     bool refreshing_ = false;
 };