// Calculates the infection chance for a given integrated exposure.
public static float GetInfectionChance(GermExposure ge, int total, float resistance)
{
/*
* Allow one exposure count with 0 effects, then use exponential function:
*
* Chance to infect = 1.0 - e^(FACTOR * -(totalOverThreshold / threshold))
*
* With factor at 0.5:
* Double exposure count ~ 40 %
* Triple exposure count ~ 63 %
* Quadruple exposure count ~ 77 %
*
* Resistance adjusts the thresholds
*/
int threshold = GermExposureTuning.ThresholdsFor(ge.Exposure).GetThreshold(ge.
Vector);
float adjThres = AdjustedThreshold(threshold, resistance), overTotal = Mathf.Floor(
total - adjThres);
// threshold of 1 is instant infection
return((overTotal > 0.0f) ? ((threshold < 2) ? 1.0f : (1.0f - Mathf.Exp(
-GermExposureTuning.CONTRACT_FACTOR * overTotal / adjThres))) : 0.0f);
}
// Creates one line of the immune system information panel.
private static void CreateOneImmuneInfo(Disease disease, GameObject target,
GermIntegrator integrator, CollapsibleDetailContentPanel panel)
{
var exposure = GameUtil.GetExposureTypeForDisease(disease);
var sickness = GameUtil.GetSicknessForDisease(disease);
ICollection <string> required = exposure.required_traits, excluded = exposure.
excluded_traits, noEffects = exposure.excluded_effects;
var traits = target.GetComponent <Traits>();
var effects = target.GetComponent <Effects>();
// The part we actually changed
float threshold = Mathf.Ceil(GermIntegrator.AdjustedThreshold(GermExposureTuning.
ThresholdsFor(exposure).GetMinThreshold(), integrator.GetResistance(exposure)));
string tooltip = "";
// Check for required traits to catch the disease
if (required != null && required.Count > 0)
{
string traitList = "";
foreach (string trait in required)
{
if (!traits.HasTrait(trait))
{
if (traitList.Length > 0)
{
traitList += ", ";
}
traitList += Db.Get().traits.Get(trait).Name;
}
}
if (traitList.Length > 0)
{
// Immune: missing required traits
threshold = 0.0f;
tooltip = string.Format(STRINGS.DUPLICANTS.DISEASES.
IMMUNE_FROM_MISSING_REQUIRED_TRAIT, traitList);
}
}
// Check for traits that prevent catching it
if (excluded != null && excluded.Count > 0)
{
string traitList = "";
foreach (string trait in excluded)
{
if (traits.HasTrait(trait))
{
if (traitList.Length > 0)
{
traitList += ", ";
}
traitList += Db.Get().traits.Get(trait).Name;
}
}
if (traitList.Length > 0)
{
// Immune: blocking trait
threshold = 0.0f;
if (tooltip.Length > 0)
{
tooltip += "\n";
}
tooltip += string.Format(STRINGS.DUPLICANTS.DISEASES.
IMMUNE_FROM_HAVING_EXLCLUDED_TRAIT, traitList);
}
}
// Check for effects that prevent catching it
if (noEffects != null && noEffects.Count > 0)
{
string effectList = "";
foreach (string effect in noEffects)
{
if (effects.HasEffect(effect))
{
if (effectList.Length > 0)
{
effectList += ", ";
}
effectList += Db.Get().effects.Get(effect).Name;
}
}
if (effectList.Length > 0)
{
// Immune: blocking effect
threshold = 0.0f;
if (tooltip.Length > 0)
{
tooltip += "\n";
}
tooltip += string.Format(STRINGS.DUPLICANTS.DISEASES.
IMMUNE_FROM_HAVING_EXCLUDED_EFFECT, effectList);
}
}
// Update the label and tooltip
if (tooltip.Length == 0)
{
if (threshold > 1.0f)
{
tooltip = string.Format(THRESHOLD_TOOLTIP, GameUtil.GetFormattedSimple(
threshold), target.GetProperName(), sickness.Name);
}
else
{
tooltip = string.Format(THRESHOLD_TOOLTIP_1, target.GetProperName(),
sickness.Name);
}
}
panel.SetLabel("disease_" + disease.Id, " • " + disease.Name + ": " +
(threshold == 0.0f ? THRESHOLD_IMMUNE.text : GameUtil.GetFormattedSimple(
threshold)), tooltip);
}
// Performs the dirty work of counting germs on a Duplicant.
private void DoInjectDisease(GermExposureMonitor.Instance monitor, Disease disease,
int count, Tag source, GermExposure ge)
{
var exposure = ge.Exposure;
int threshold = GermExposureTuning.ThresholdsFor(exposure).GetThreshold(ge.Vector);
if (threshold > 0 && gameObject != null)
{
string germ = ge.GermID;
var state = monitor.GetExposureState(germ);
// Eligible addition to the integrated exposure calculations
if (integratedExposure.TryGetValue(ge, out int total))
{
total += count;
}
else
{
total = count;
}
#if DEBUG
PUtil.LogDebug("{0} has {1:D} germs of {2} by {3} (threshold = {4:D})".F(
gameObject.name, count, germ, ge.Vector, threshold));
#endif
integratedExposure[ge] = total;
// Resistance is required to move the thresholds which is used for tier
// calculation
float resist = GetResistance(exposure), adjThres = AdjustedThreshold(
threshold, resist), tier = total / adjThres;
switch (state)
{
case ExposureState.None:
case ExposureState.Contact:
// Update location where they encountered the germ
monitor.lastDiseaseSources[disease.id] = new DiseaseSourceInfo(source,
ge.Vector, GetInfectionChance(ge, total, resist), transform.
GetPosition());
if (total > adjThres)
{
if (exposure.infect_immediately)
{
// The ultimate evil flag
#if DEBUG
PUtil.LogDebug("Infecting {0} with {1}".F(gameObject.name, germ));
#endif
monitor.InfectImmediately(exposure);
}
else
{
// "Exposed to slimelung"
monitor.SetExposureState(germ, ExposureState.Exposed);
monitor.SetExposureTier(germ, tier);
#if DEBUG
PUtil.LogDebug("{0} exposed to {1} tier {2:F1}".F(gameObject.name,
germ, tier));
#endif
}
}
else if (state == ExposureState.None)
{
// "Contact with slimelung"
monitor.SetExposureState(germ, ExposureState.Contact);
}
break;
case ExposureState.Exposed:
// Upgrade the visual tier
if (total > threshold && tier > monitor.GetExposureTier(germ))
{
monitor.SetExposureTier(germ, tier);
#if DEBUG
PUtil.LogDebug("{0} exposure of {1} upgraded to {2:F1}".F(gameObject.
name, germ, tier));
#endif
}
break;
case ExposureState.Contracted:
case ExposureState.Sick:
// Already sick
break;
default:
break;
}
}
}