public link_data ComputeLink(Vessel v, HashSet <Guid> avoid_inf_recursion)
{
// if it has no antenna
if (antennas[v.id].range <= double.Epsilon)
{
return(new link_data(false, link_status.no_antenna, 0.0));
}
// if there is a storm and the vessel is inside a magnetosphere
if (Blackout(v))
{
return(new link_data(false, link_status.no_link, 0.0));
}
// check for direct link
// note: we also get distance from the cache and store it in the link
double direct_visible_dist = direct_visibility_cache[v.id];
bool direct_visible = direct_visible_dist > 0.0;
if (direct_visible)
{
return(new link_data(true, link_status.direct_link, direct_visible_dist));
}
// avoid infinite recursion
avoid_inf_recursion.Add(v.id);
// get antenna data
antenna_data v_ad = antennas[v.id];
// check for indirect link
foreach (Vessel w in FlightGlobals.Vessels)
{
// skip invalid vessels
if (!Lib.IsVessel(w))
{
continue;
}
// avoid infinite recursion
if (avoid_inf_recursion.Contains(w.id))
{
continue;
}
// avoid testing against itself
if (v == w)
{
continue;
}
// get antenna data
antenna_data w_ad = antennas[w.id];
// check for indirect link to home body
// note: we also get distance from the cache
// note: we check the relay range, that is asymmetric
double indirect_visible_dist = indirect_visibility_cache[Lib.CombineGuid(v.id, w.id)];
bool indirect_visible = indirect_visible_dist > 0.0 && indirect_visible_dist < Math.Min(v_ad.range, w_ad.relay_range);
if (indirect_visible)
{
// check link to home body, recursively
link_data next_link = ComputeLink(w, avoid_inf_recursion);
// if indirectly linked
if (next_link.linked)
{
// flag the relay for ec consumption, but only once
if (!active_relays.ContainsKey(w.id))
{
active_relays.Add(w.id, w_ad.relay_cost);
}
// update the link data and return it
next_link.status = link_status.indirect_link;
next_link.distance = indirect_visible_dist; //< store distance of last link
next_link.path.Add(w.vesselName);
next_link.path_id.Add(w.id);
return(next_link);
}
}
}
// no link
return(new link_data(false, link_status.no_link, 0.0));
}
public static link_data Link(Vessel v, Vector3d position, antenna_data antenna, bool blackout, HashSet <Guid> avoid_inf_recursion)
{
// assume linked if signal mechanic is disabled
if (!Kerbalism.features.signal)
{
return(new link_data(true, link_status.direct_link, double.MaxValue));
}
// if it has no antenna
if (antenna.range <= double.Epsilon)
{
return(new link_data(false, link_status.no_antenna, 0.0));
}
// if there is a storm and the vessel is inside a magnetosphere
if (blackout)
{
return(new link_data(false, link_status.no_link, 0.0));
}
// store raytracing data
Vector3d dir;
double dist;
bool visible;
// raytrace home body
visible = Sim.RaytraceBody(v, position, FlightGlobals.GetHomeBody(), out dir, out dist);
dist = visible && antenna.range > dist ? dist : double.MaxValue;
// if directly linked
if (antenna.range > dist)
{
return(new link_data(true, link_status.direct_link, dist));
}
// for each other vessel
foreach (Vessel w in FlightGlobals.Vessels)
{
// do not test with itself
if (v == w)
{
continue;
}
// skip vessels already in this chain
if (avoid_inf_recursion.Contains(w.id))
{
continue;
}
// get vessel from the cache
// note: safe because we are avoiding infinite recursion
vessel_info wi = Cache.VesselInfo(w);
// skip invalid vessels
if (!wi.is_valid)
{
continue;
}
// skip non-relays and non-linked relays
if (wi.antenna.relay_range <= double.Epsilon || !wi.link.linked)
{
continue;
}
// raytrace the other vessel
visible = Sim.RaytraceVessel(v, w, position, wi.position, out dir, out dist);
dist = visible && antenna.range > dist ? dist : double.MaxValue;
// if indirectly linked
// note: relays with no EC have zero relay_range
// note: avoid relay loops
if (antenna.range > dist && wi.antenna.relay_range > dist && !wi.link.path.Contains(v))
{
// create indirect link data
link_data link = new link_data(wi.link);
// update the link data and return it
link.status = link_status.indirect_link;
link.distance = dist; //< store distance of last link
link.path.Add(w);
return(link);
}
}
// no link
return(new link_data(false, link_status.no_link, 0.0));
}
// build the visibility caches
void BuildVisibility()
{
// get home body
CelestialBody home = FlightGlobals.GetHomeBody();
// build direct visibility cache
direct_visibility_cache.Clear();
foreach (Vessel v in FlightGlobals.Vessels)
{
// skip invalid vessels
if (!Lib.IsVessel(v))
{
continue;
}
// get antenna data
antenna_data ad = antennas[v.id];
// raytrace home body
Vector3d dir;
double dist = 0.0;
bool visible = Sim.RaytraceBody(v, home, out dir, out dist);
dist = Math.Abs(dist); //< avoid problem below water level
// store in visibility cache
// note: we store distance & visibility flag at the same time
direct_visibility_cache.Add(v.id, visible && dist < ad.range ? dist : 0.0);
}
// build indirect visibility cache
indirect_visibility_cache.Clear();
foreach (Vessel v in FlightGlobals.Vessels)
{
// skip invalid vessels
if (!Lib.IsVessel(v))
{
continue;
}
// get antenna data
antenna_data v_ad = antennas[v.id];
// for each vessel
foreach (Vessel w in FlightGlobals.Vessels)
{
// skip invalid vessels
if (!Lib.IsVessel(w))
{
continue;
}
// do not test with itself
if (v == w)
{
continue;
}
// do not compute visibility when both vessels have a direct link
// rationale: optimization, the indirect visibility it never used in this case
if (direct_visibility_cache[v.id] > double.Epsilon && direct_visibility_cache[w.id] > double.Epsilon)
{
continue;
}
// generate merged guid
Guid id = Lib.CombineGuid(v.id, w.id);
// avoid raycasting the same pair twice
if (indirect_visibility_cache.ContainsKey(id))
{
continue;
}
// get antenna data
antenna_data w_ad = antennas[w.id];
// raytrace the vessel
Vector3d dir;
double dist = 0.0;
bool visible = Sim.RaytraceVessel(v, w, out dir, out dist);
// store visibility in cache
// note: we store distance & visibility flag at the same time
// note: relay visibility is asymmetric, done at link build time
indirect_visibility_cache.Add(id, visible && dist < Math.Min(v_ad.range, w_ad.range) ? dist : 0.0);
}
}
}
public vessel_info(Vessel v, uint vessel_id, UInt64 inc)
{
// NOTE: anything used here can't in turn use cache, unless you know what you are doing
// associate with an unique incremental id
this.inc = inc;
// determine if this is a valid vessel
is_vessel = Lib.IsVessel(v);
if (!is_vessel) return;
// determine if this is a resque mission vessel
is_resque = Lib.IsResqueMission(v);
if (is_resque) return;
// dead EVA are not valid vessels
if (v.isEVA && EVA.KerbalData(v).eva_dead) return;
// shortcut for common tests
is_valid = true;
// generate id once
id = vessel_id;
// calculate crew info for the vessel
crew_count = Lib.CrewCount(v);
crew_capacity = Lib.CrewCapacity(v);
// get vessel position once
position = Lib.VesselPosition(v);
// determine if in sunlight, calculate sun direction and distance
sunlight = Sim.RaytraceBody(v, position, FlightGlobals.Bodies[0], out sun_dir, out sun_dist) ? 1.0 : 0.0;
// if the orbit length vs simulation step is lower than an acceptable threshold, use discrete sun visibility
if (v.mainBody.flightGlobalsIndex != 0)
{
double orbit_period = Sim.OrbitalPeriod(v);
if (orbit_period / Kerbalism.elapsed_s < 16.0) sunlight = 1.0 - Sim.ShadowPeriod(v) / orbit_period;
}
// calculate environment stuff
atmo_factor = Sim.AtmosphereFactor(v.mainBody, position, sun_dir);
gamma_transparency = Sim.GammaTransparency(v.mainBody, v.altitude);
breathable = Sim.Breathable(v);
landed = Lib.Landed(v);
// calculate temperature at vessel position
temperature = Sim.Temperature(v, position, sunlight, atmo_factor, out solar_flux, out albedo_flux, out body_flux, out total_flux);
// calculate radiation
radiation = Radiation.Compute(v, position, gamma_transparency, sunlight, out blackout, out inside_pause, out inside_belt);
// calculate malfunction stuff
max_malfunction = Reliability.MaxMalfunction(v);
avg_quality = Reliability.AverageQuality(v);
// calculate signal info
antenna = new antenna_data(v);
avoid_inf_recursion.Add(v.id);
link = Signal.Link(v, position, antenna, blackout, avoid_inf_recursion);
avoid_inf_recursion.Remove(v.id);
// partial data about modules, used by vessel info/monitor
scrubbers = Scrubber.PartialData(v);
recyclers = Recycler.PartialData(v);
greenhouses = Greenhouse.PartialData(v);
// woot relativity
time_dilation = Sim.TimeDilation(v);
}