update TODO with more ideas, group items

diff --git a/TODO b/TODO
index 1bf99c834d8ad001462ae488acbfbc5c21a59d6f..ac7b380adc1d357665a333dc03ad2aeb6149ec14 100644 (file)
--- a/TODO
+++ b/TODO
@@ -5,14 +5,22 @@ Required:
 * Improve tile cache:
 ** If cached tiles have changed, possibly also try (async) updates of other cached zoom levels covering this area
 ** Pre-cache tiles in adjacent areas and possibly zoom levels
+*** Feature to download all maps up to a certain resolution for some area around the current point
 * Improve texture cleaning algorithm
-* Show a notification when we are loading tiles or saved data
-* Display movement speed
-* Display location accuracy
-* Show a better visible marker for the current location, possibly also indicating movement direction/speed
-* Smooth animations for zooming, probably using some WebGL magic
-* Use available larger/smaller tiles with resizing as loading placeholders while zooming in/out
-* Find better UI for track length/duration display
+* UI improvements (non-map):
+** Change general/track settings to drawer style
+** Show a notification when we are loading tiles or saved data
+** Display movement speed
+** Display location accuracy
+** Find better UI for track length/duration display
+* Map/track display improvements:
+** Speed up track drawing:
+*** Only draw lines that are visible
+*** Reduce lines to draw by eliminating unneeded detail (based on zoom level)
+*** Make track drawing async and hooked up to requestAnimationFrame()
+** Show a better visible marker for the current location, possibly also indicating movement direction/speed
+** Smooth animations for zooming, probably using some WebGL magic
+** Use available larger/smaller tiles with resizing as loading placeholders while zooming in/out
 * Better GPX saving implementation [blocked by missing web APIs]
 ** Set file name to save into to a good default (date + maybe some location name)