feat(app): CentralScene 数据驱动 helper（解耦中央三维编排，下一轮接真实DS复用）

src/app/CMakeLists.txt

@@ -22,7 +22,8 @@ add_executable(geopro_desktop WIN32
   login/LoginWindow.cpp
   panels/AnomalyListPanel.cpp
   panels/DatasetListPanel.cpp
-  panels/ObjectTreePanel.cpp)
+  panels/ObjectTreePanel.cpp
+  CentralScene.cpp)
 
 target_include_directories(geopro_desktop PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
 

src/app/CentralScene.cpp

@@ -0,0 +1,44 @@
+#include "CentralScene.hpp"
+
+#include <vtkActor.h>
+#include <vtkRenderWindow.h>
+#include <vtkRenderer.h>
+
+#include "CameraPreset.hpp"
+#include "Scene.hpp"
+#include "actors/CurtainActor.hpp"
+#include "actors/MapLineActor.hpp"
+#include "geo/GeoLocalFrame.hpp"
+
+namespace geopro::app {
+
+void rebuildCentralScene(geopro::render::Scene& scene, vtkRenderer* renderer,
+                         vtkRenderWindow* renderWindow, ViewMode mode,
+                         const std::vector<SectionInput>& sections, bool showCurtain,
+                         const geopro::core::GeoLocalFrame& frame, double verticalExaggeration) {
+    scene.clear();
+    const bool is2D = (mode == ViewMode::Map2D);
+    renderer->SetBackground(is2D ? 0.96 : 1.0, is2D ? 0.97 : 1.0, is2D ? 0.99 : 1.0);
+
+    for (const auto& s : sections) {
+        if (is2D) {
+            auto line = geopro::render::buildSurveyLine(s.grid, frame);
+            if (line) scene.addActor(line);
+        } else if (showCurtain) {
+            auto curtain = geopro::render::buildCurtain(s.grid, s.colorScale, frame);
+            if (curtain) {
+                curtain->SetScale(1.0, 1.0, verticalExaggeration);  // 纵向夸张成墙
+                scene.addActor(curtain);
+            }
+        }
+    }
+
+    if (is2D)
+        geopro::render::applyTop2D(renderer);
+    else
+        geopro::render::applyFree3D(renderer);
+    renderer->ResetCamera();
+    renderWindow->Render();
+}
+
+}  // namespace geopro::app

src/app/CentralScene.hpp

@@ -0,0 +1,31 @@
+#pragma once
+#include <vector>
+
+#include "model/ColorScale.hpp"
+#include "model/Field.hpp"
+
+namespace geopro::core { class GeoLocalFrame; }
+namespace geopro::render { class Scene; }
+class vtkRenderer;
+class vtkRenderWindow;
+
+namespace geopro::app {
+
+// 中央视图模式：二维地图（测线红线俯视）/ 三维视图（断面墙）。
+enum class ViewMode { Map2D, View3D };
+
+// 一个待渲染剖面：grid（2D 测线 / 3D 帘面都用）+ colorScale（3D 帘面上色）。
+struct SectionInput {
+    geopro::core::Grid grid;
+    geopro::core::ColorScale colorScale;
+};
+
+// 中央场景重建（脱离对象树，按显式 sections 渲染）：
+//   2D = 每个 section 的 buildSurveyLine；3D = 每个 section 的 buildCurtain（受 showCurtain）。
+// 下一轮接真实 DS：构建 sections 后调用本函数即可，render 层零改动。
+void rebuildCentralScene(geopro::render::Scene& scene, vtkRenderer* renderer,
+                         vtkRenderWindow* renderWindow, ViewMode mode,
+                         const std::vector<SectionInput>& sections, bool showCurtain,
+                         const geopro::core::GeoLocalFrame& frame, double verticalExaggeration);
+
+}  // namespace geopro::app