void Visit(const AirspaceCircle& airspace) {
RasterPoint screen_center = projection.GeoToScreen(airspace.GetCenter());
unsigned screen_radius = projection.GeoToScreenDistance(airspace.GetRadius());
GLEnable stencil(GL_STENCIL_TEST);
{
GLEnable blend(GL_BLEND);
setup_interior(airspace);
if (m_warnings.is_warning(airspace) ||
m_warnings.is_inside(airspace) ||
airspace_look.thick_pen.GetWidth() >= 2 * screen_radius) {
// fill whole circle
canvas.circle(screen_center.x, screen_center.y, screen_radius);
} else {
// draw a ring inside the circle
Color color = airspace_look.colors[settings.colours[airspace.GetType()]];
Pen pen_donut(airspace_look.thick_pen.GetWidth() / 2, color.WithAlpha(90));
canvas.SelectHollowBrush();
canvas.Select(pen_donut);
canvas.circle(screen_center.x, screen_center.y,
screen_radius - airspace_look.thick_pen.GetWidth() / 4);
}
}
// draw outline
setup_outline(airspace);
canvas.circle(screen_center.x, screen_center.y, screen_radius);
}
void Visit(const AirspacePolygon& airspace) {
if (!prepare_polygon(airspace.GetPoints()))
return;
bool fill_airspace = m_warnings.is_warning(airspace) ||
m_warnings.is_inside(airspace);
GLEnable stencil(GL_STENCIL_TEST);
if (!m_warnings.is_acked(airspace)) {
if (!fill_airspace) {
// set stencil for filling (bit 0)
set_fillstencil();
draw_prepared();
}
// fill interior without overpainting any previous outlines
{
setup_interior(airspace, !fill_airspace);
GLEnable blend(GL_BLEND);
draw_prepared();
}
if (!fill_airspace) {
// clear fill stencil (bit 0)
clear_fillstencil();
draw_prepared();
}
}
// draw outline
setup_outline(airspace);
draw_prepared();
}
/**********************************************************************
* setup_blob_outlines
*
* Set up each of the outlines in this blob.
**********************************************************************/
void setup_blob_outlines(TBLOB *blob) {
TESSLINE *outline;
for (outline = blob->outlines; outline; outline = outline->next) {
setup_outline(outline);
}
}
void Visit(const AirspaceCircle& airspace) {
RasterPoint screen_center = projection.GeoToScreen(airspace.GetCenter());
unsigned screen_radius = projection.GeoToScreenDistance(airspace.GetRadius());
{
GLEnable blend(GL_BLEND);
setup_interior(airspace);
canvas.circle(screen_center.x, screen_center.y, screen_radius);
}
// draw outline
setup_outline(airspace);
canvas.circle(screen_center.x, screen_center.y, screen_radius);
}
void Visit(const AirspacePolygon& airspace) {
if (!prepare_polygon(airspace.GetPoints()))
return;
if (!m_warnings.is_acked(airspace)) {
// fill interior without overpainting any previous outlines
{
setup_interior(airspace);
GLEnable blend(GL_BLEND);
draw_prepared();
}
}
// draw outline
setup_outline(airspace);
draw_prepared();
}