u/nikos2wheels

I built and compiled the OsmAnd source code. I am working on a project and I would like to modify the code to implement the following look:

1. Overlay a black mask over the entire map and before the route.
2. Show only the intersecting roads along the route with a clipping radius of 50-100m around the intersection.

where the thick white line is the route line and the thin white lines are the intersecting roads.

I understand the route is handled by OpenGL in the C++ core. For the intersecting roads I thought of doing the task in the private part of the routing context by querying the OBF map data for roads that cross the current tile. In particular, in the file src/NetworkRouteContext_P.cpp

void OsmAnd::NetworkRouteContext_P::loadRouteSegmentIntersectingTile(

int32_t x, int32_t y, const NetworkRouteKey * routeKey,

QHash<NetworkRouteKey, QList<std::shared_ptr<OsmAnd::NetworkRouteSegment>>> & map)

{

// Convert 31-bit coordinates to routing tile coordinates

NetworkRoutesTile osmcRoutesTile = getMapRouteTile(x << ZOOM_TO_LOAD_TILES_SHIFT_L, y << ZOOM_TO_LOAD_TILES_SHIFT_L);

for (auto u_it = osmcRoutesTile.uniqueSegments.begin(); u_it != osmcRoutesTile.uniqueSegments.end(); ++u_it)

{

const auto &segment = u_it.value();

// Optional filtering by a specific route key (e.g., if we only want 'primary' roads)

if (routeKey != nullptr && segment->routeKey != *routeKey)

{

continue;

}

auto i = map.find(segment->routeKey);

if (i == map.end())

{

QList<std::shared_ptr<NetworkRouteSegment>> empty;

i = map.insert(segment->routeKey, empty);

}

i.value().append(segment);

}

}

Is this a good strategy?