From 87893c0d6b92e36fb5046cc9e2c8b5506ee03d0d Mon Sep 17 00:00:00 2001
From: Mykola Dvornik <mykola.dvornik@gmail.com>
Date: Thu, 14 Jul 2022 23:03:57 +0200
Subject: [PATCH] Improve map rendering

by making Cesium fetch higher resolution tiles more aggressively as
suggested in
https://github.com/CesiumGS/cesium/issues/3279#issuecomment-271481280
---
 df-aggregator.py |  8 ++++++--
 views/cesium.tpl | 25 +++++++++++++++++++++++++
 2 files changed, 31 insertions(+), 2 deletions(-)

diff --git a/df-aggregator.py b/df-aggregator.py
index 96a8022..64ebcea 100755
--- a/df-aggregator.py
+++ b/df-aggregator.py
@@ -54,7 +54,7 @@
 d = 40000  # draw distance of LOBs in meters
 max_age = 5000
 receivers = []
-
+hqmaprendering = False
 
 ###############################################
 # Stores settings realted to intersect capture
@@ -790,7 +790,8 @@ def cesium():
                      'minpoints': ms.min_samp,
                      'rx_state': "checked" if ms.receiving is True else "",
                      'intersect_state': "checked" if ms.plotintersects is True else "",
-                     'receivers': receivers})
+                     'receivers': receivers,
+                     'hqmaprendering_state': "checked" if hqmaprendering else ""})
 
 
 ###############################################
@@ -799,6 +800,7 @@ def cesium():
 ###############################################
 @get('/update')
 def update_cesium():
+    global hqmaprendering
     # eps = float(request.query.eps) if request.query.eps else ms.eps
     # min_samp = float(request.query.minpts) if request.query.minpts else ms.min_samp
     ms.min_conf = float(
@@ -811,6 +813,8 @@ def update_cesium():
     elif request.query.rx == "false":
         ms.receiving = False
 
+    hqmaprendering = True if request.query.hqmaprendering == "true" else False
+
     # if request.query.plotpts == "true":
     #     ms.plotintersects = True
     # elif request.query.plotpts == "false":
diff --git a/views/cesium.tpl b/views/cesium.tpl
index 51991c3..364e84e 100644
--- a/views/cesium.tpl
+++ b/views/cesium.tpl
@@ -69,6 +69,9 @@
       mapProjection : new Cesium.WebMercatorProjection(),
     });
 
+    viewer.scene.postProcessStages.fxaa.enabled = false;
+    defaultMaximumScreenSpaceError = viewer.scene.globe.maximumScreenSpaceError;
+
     viewer.infoBox.frame.setAttribute("sandbox", "allow-same-origin allow-popups allow-popups-to-escape-sandbox");
     viewer.infoBox.frame.src = "about:blank";
 
@@ -453,6 +456,17 @@
           Enabling this can cause longer load times.</span>
       </span>
     </div>
+    <div class="tooltip">
+      <span>
+      <span class="slidetitle"><h4>Enable High Quality Map Rendering:</h4></span>
+      <span class="slidespan" style="text-align:left;width: 100px;margin: 5px;">
+      <label class="switch">
+      <input id="hqmaprendering_en" name="hqmaprendering_en" {{hqmaprendering_state}} type="checkbox">
+      <span class="switchslider round"></span>
+      </label></span>
+      </span>
+      <span class="tooltiptext">Enables or disables high quality map rendering.</span>
+    </div>
     <div>
       <span><input id="refreshbutton" class="slider" type="button" value="Refresh" onclick="updateParams()"></span>
     </div>
@@ -486,6 +500,7 @@
 
     var intersect_en = document.getElementById("intersect_en");
     // var clustering_en = document.getElementById("clustering_en");
+    var hqmaprendering_en = document.getElementById("hqmaprendering_en");
 
     // Update the current slider value (each time you drag the slider handle)
     epsslider.oninput = function() {
@@ -533,6 +548,16 @@
       updateParams("");
     }
 
+    hqmaprendering_en.onchange = function() {
+      if (hqmaprendering_en.checked) {
+        viewer.scene.globe.maximumScreenSpaceError = 1.0;
+        updateParams("hqmaprendering=true");
+      } else {
+        viewer.scene.globe.maximumScreenSpaceError = defaultMaximumScreenSpaceError;
+        updateParams("hqmaprendering=false");
+      }
+    }
+
   </script>
 </body>
 </html>