From a4866de68ccbaa04965f027764a0dfb150383893 Mon Sep 17 00:00:00 2001
From: gaozheng <gaozheng.cn@gmail.com>
Date: Wed, 17 Jun 2026 11:47:03 +0800
Subject: [PATCH] =?UTF-8?q?fix(vtk):=20=E5=BA=95=E5=9B=BE=E8=A6=86?=
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---
 src/app/TileBasemap.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/app/TileBasemap.cpp b/src/app/TileBasemap.cpp
index 80abb94..ac2029c 100644
--- a/src/app/TileBasemap.cpp
+++ b/src/app/TileBasemap.cpp
@@ -39,7 +39,7 @@ namespace geopro::app {
 namespace {
 // 天地图 WMTS 令牌（与轨迹图 trajectory_map.html 同源）。
 const char* kTk = "aca91d8c9f59a4f779f39061b8a07737";
-constexpr int kRadius = 3;            // 中心瓦片 ±3 → 最多 7x7=49 块，留平移余量
+constexpr int kRadius = 4;            // 中心瓦片 ±4 → 最多 9x9=81 块，留旋转/平移余量(治近距旋转黑边)
 constexpr int kMinZoom = 3;
 constexpr int kMaxZoom = 18;
 constexpr double kGroundZ = 0.0;      // 底图置于 z=0 地面参考（剖面深度向下为负，落其下）
@@ -80,7 +80,10 @@ vtkSmartPointer<vtkTexture> makeTexture(const QImage& img) {
     }
     auto tex = vtkSmartPointer<vtkTexture>::New();
     tex->SetInputData(vimg);
-    tex->InterpolateOn();
+    tex->InterpolateOn();                       // 双线性
+    tex->MipmapOn();                            // 缩小/斜视不闪烁、不糊
+    tex->SetMaximumAnisotropicFiltering(16);    // 斜视角下纹理保持清晰
+    tex->EdgeClampOn();                         // 边缘夹紧，避免相邻瓦片接缝渗色
     return tex;
 }