OZBoundary
AnnularSectorZone::GetBoundary() const
{
OZBoundary boundary;
const unsigned steps = 20;
const Angle delta = Angle::FullCircle() / steps;
const Angle start = GetStartRadial().AsBearing();
Angle end = GetEndRadial().AsBearing();
if (end <= start + Angle::FullCircle() / 512)
end += Angle::FullCircle();
const GeoPoint inner_start =
GeoVector(GetInnerRadius(), GetStartRadial()).EndPoint(GetReference());
const GeoPoint inner_end =
GeoVector(GetInnerRadius(), GetEndRadial()).EndPoint(GetReference());
GeoVector inner_vector(GetInnerRadius(), start + delta);
for (; inner_vector.bearing < end; inner_vector.bearing += delta)
boundary.push_front(inner_vector.EndPoint(GetReference()));
boundary.push_front(inner_end);
boundary.push_front(inner_start);
GeoVector vector(GetRadius(), start + delta);
for (; vector.bearing < end; vector.bearing += delta)
boundary.push_front(vector.EndPoint(GetReference()));
boundary.push_front(GetSectorEnd());
boundary.push_front(GetSectorStart());
return boundary;
}
GeoPoint
AnnularSectorZone::GetBoundaryParametric(fixed t) const
{
const Angle sweep = (GetEndRadial() - GetStartRadial()).AsBearing();
const fixed c0 = sweep.Radians() * inner_radius;
const fixed l = GetRadius() - inner_radius;
const fixed c1 = sweep.Radians() * GetRadius();
const fixed tt = t * (c0 + c1 + 2 * l);
Angle a;
fixed d;
if (tt < c0) {
d = inner_radius;
a = Angle::Radians((tt / c0) * sweep.Radians()) + GetStartRadial();
} else if (positive(l) && (tt < c0 + l)) {
d = (tt - c0) / l * (GetRadius() - inner_radius) + inner_radius;
a = GetEndRadial();
} else if (tt < c0 + l + c1) {
d = GetRadius();
a = GetEndRadial()
- Angle::Radians(((tt - c0 - l) / c1) * sweep.Radians());
} else if (positive(l)) {
d = (tt - c0 - l - c1) / l * (inner_radius - GetRadius()) + GetRadius();
a = GetStartRadial();
} else {
d = inner_radius;
a = GetStartRadial();
}
return GeoVector(d, a).EndPoint(GetReference());
}
OZBoundary
KeyholeZone::GetBoundary() const
{
OZBoundary boundary;
boundary.push_front(GetSectorStart());
boundary.push_front(GetSectorEnd());
boundary.GenerateArcExcluding(GetReference(), GetRadius(),
GetStartRadial(), GetEndRadial());
const fixed small_radius = GetInnerRadius();
GeoVector small_vector(small_radius, GetStartRadial());
boundary.push_front(small_vector.EndPoint(GetReference()));
small_vector.bearing = GetEndRadial();
boundary.push_front(small_vector.EndPoint(GetReference()));
boundary.GenerateArcExcluding(GetReference(), small_radius,
GetEndRadial(), GetStartRadial());
return std::move(boundary);
}
OZBoundary
SectorZone::GetBoundary() const
{
OZBoundary boundary;
boundary.push_front(GetReference());
boundary.push_front(GetSectorStart());
boundary.push_front(GetSectorEnd());
boundary.GenerateArcExcluding(GetReference(), GetRadius(),
GetStartRadial(), GetEndRadial());
return boundary;
}