[Differential] [Request, 68 lines] D2417: Adding more points to the edges of the tiles

[dkolozsvari (Dávid Kolozsvári)]

dkolozsvari created this revision.
dkolozsvari added reviewers: nienhueser, rahn.
dkolozsvari added a subscriber: Marble.
dkolozsvari set the repository for this revision to rMARBLE Marble.
dkolozsvari added a project: Marble.

REVISION SUMMARY
  This is a fast approach on how to add more nodes to the edges of the tiles. This is required for a nice rendering on non-Mercator projections. The results are pretty good, as seen on the second screenshot(first screenshot is without the added nodes).
  
  Using `GeoDataCoordinates::interpolate()` would be better(?) approach to generate the added nodes, but that would require to translate from `QPolygonF` back to `GeoDataLineString` in the cutting algorithm, and then convert it to a `QList<QSharedPointer<LinkedPoint>>`. If there is no visible benefit from using that approach, I would stick with this.
  
  The formula to calculate the number of nodes to add can be changed,
  
    MAXIMUM_POINTS_TO_ADD - zoomLevel
  
  is only for demonstration. Suggestions are welcome.
  
  Before (problematic spots marked):
  F255735: Screenshot_20160812_102318.png <https://phabricator.kde.org/F255735>
  
  After:
  F255737: Screenshot_20160812_101924.png <https://phabricator.kde.org/F255737>

REPOSITORY
  rMARBLE Marble

REVISION DETAIL
  https://phabricator.kde.org/D2417

AFFECTED FILES
  tools/osm-simplify/BaseClipper.cpp
  tools/osm-simplify/BaseClipper.h
  tools/osm-simplify/ShpCoastlineProcessor.cpp
  tools/osm-simplify/TinyPlanetProcessor.cpp

EMAIL PREFERENCES
  https://phabricator.kde.org/settings/panel/emailpreferences/

To: dkolozsvari, nienhueser, rahn
Cc: #marble, shentey, chaz6, dkolozsvari, cmihalache, rahn, nienhueser, marble-devel
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