// Applies a set of rules to a given output
private void ApplyRuleSet(Rule[] rules)
{
IFuzzy ruleResults = Fuzzy.Zero();
Debug.Assert(rules.Length > 0);
LinguisticVariable output = rules[0].output;
for (int i = 0; i < rules.Length; ++i)
{
Rule r = rules[i];
// Make sure everything in this rule exists
if (!r.IsValid())
{
Debug.LogWarning("Bad fuzzy rule: " + r.ToString());
continue;
}
// Make sure all of the rules have the same properties, we don't want to mix up our outputs
Debug.Assert(r.output == output, r.output + "!=" + output);
// Input to the fuzzy membership is the input's referenced field
float input = r.input.value;
// Apply the rule
IFuzzy ruleStrength = r.ApplyRule(input);
// Combine this input with the other inputs to the rule
ruleResults = Fuzzy.Union(ruleResults, ruleStrength);
// TODO maybe make this so I don't have ~n! copies of rules in memory
}
// Defuzzify them
float crisp = Fuzzy.Defuzzify(ruleResults);
if (ConfidenceLerp)
{
FuzzyOutput confidence = ruleResults.Membership(crisp);
output.value = Mathf.Lerp(output.value, crisp, confidence);
}
else
{
output.value = crisp;
}
}
