static void
GetPolygonPoints(std::vector<RasterPoint> &pts,
const AirspacePolygon &airspace,
const RasterPoint pt, unsigned radius)
{
GeoBounds bounds = airspace.GetGeoBounds();
GeoPoint center = bounds.GetCenter();
fixed geo_heigth = bounds.GetGeoHeight();
fixed geo_width = bounds.GetGeoWidth();
fixed geo_size = std::max(geo_heigth, geo_width);
WindowProjection projection;
projection.SetScreenSize({radius * 2, radius * 2});
projection.SetScreenOrigin(pt.x, pt.y);
projection.SetGeoLocation(center);
projection.SetScale(fixed(radius * 2) / geo_size);
projection.SetScreenAngle(Angle::Zero());
projection.UpdateScreenBounds();
const SearchPointVector &border = airspace.GetPoints();
pts.reserve(border.size());
for (auto it = border.begin(), it_end = border.end(); it != it_end; ++it)
pts.push_back(projection.GeoToScreen(it->GetLocation()));
}
void
OZPreviewRenderer::Draw(Canvas &canvas, const ObservationZonePoint &oz,
const RasterPoint pt, unsigned radius,
const TaskLook &look,
const AirspaceRendererSettings &airspace_settings,
const AirspaceLook &airspace_look)
{
fixed scale;
GeoPoint center;
if (IsAncientHardware()) {
scale = fixed(radius) / ((const CylinderZone &)oz).GetRadius();
center = oz.GetReference();
} else {
OZBoundary boundary = oz.GetBoundary();
GeoBounds bounds = GeoBounds::Invalid();
for (auto i = boundary.begin(), end = boundary.end(); i != end; ++i)
bounds.Extend(*i);
center = bounds.GetCenter();
fixed geo_width = bounds.GetGeoWidth();
fixed geo_heigth = bounds.GetGeoHeight();
scale = fixed(radius * 2) / std::max(geo_heigth, geo_width);
}
WindowProjection projection;
projection.SetScreenSize({radius * 2, radius * 2});
projection.SetScreenOrigin(pt.x, pt.y);
projection.SetGeoLocation(center);
projection.SetScale(scale);
projection.SetScreenAngle(Angle::Zero());
projection.UpdateScreenBounds();
OZRenderer ozv(look, airspace_look, airspace_settings);
ozv.Draw(canvas, OZRenderer::LAYER_SHADE, projection, oz, 1);
ozv.Draw(canvas, OZRenderer::LAYER_INACTIVE, projection, oz, 1);
ozv.Draw(canvas, OZRenderer::LAYER_ACTIVE, projection, oz, 1);
}