/**
* Renders the AbstractAirspace on the canvas
* @param as AbstractAirspace to render
*/
void
Render(const AbstractAirspace& as)
{
int type = as.get_type();
if (type <= 0)
return;
// No intersections for this airspace
if (m_intersections.empty())
return;
// Select pens and brushes
#ifdef ENABLE_SDL
Color color =
Graphics::GetAirspaceColour(settings.colours[type]);
#ifdef ENABLE_OPENGL
color = color.with_alpha(48);
#endif
Brush brush(color);
#else
const Brush &brush = Graphics::GetAirspaceBrushByClass(type, settings);
canvas.set_text_color(light_color(Graphics::GetAirspaceColourByClass(type, settings)));
#endif
PixelRect rcd;
// Calculate top and bottom coordinate
rcd.top = chart.screenY(as.get_top_altitude(state));
if (as.is_base_terrain())
rcd.bottom = chart.screenY(fixed_zero);
else
rcd.bottom = chart.screenY(as.get_base_altitude(state));
// Iterate through the intersections
for (AirspaceIntersectionVector::const_iterator it = m_intersections.begin();
it != m_intersections.end(); ++it) {
const GeoPoint p_start = it->first;
const GeoPoint p_end = it->second;
const fixed distance_start = start.distance(p_start);
const fixed distance_end = start.distance(p_end);
// Determine left and right coordinate
rcd.left = chart.screenX(distance_start);
rcd.right = chart.screenX(distance_end);
// only one edge found, next edge must be beyond screen
if ((rcd.left == rcd.right) && (p_start == p_end)) {
rcd.right = chart.screenX(chart.getXmax());
}
// Draw the airspace
RenderBox(rcd, brush, settings.black_outline, type);
}
}
bool exclude_alt(const AbstractAirspace& airspace) {
if (!positive(m_max_alt)) {
return false;
}
return (airspace.get_base_altitude(m_state)> m_max_alt);
}