fixed issues in sigmoid sensor model causing inverted response (annular partitions)

sensorModels/@sigmoidSensor/sense.m

@@ -0,0 +1,21 @@
+function [values, positions] = sense(obj, agent, sensingObjective, domain, partitioning)
+    arguments (Input)
+        obj (1, 1) {mustBeA(obj, 'sigmoidSensor')};
+        agent (1, 1) {mustBeA(agent, 'agent')};
+        sensingObjective (1, 1) {mustBeA(sensingObjective, 'sensingObjective')};
+        domain (1, 1) {mustBeGeometry};
+        partitioning (:, :) double;
+    end
+    arguments (Output)
+        values (:, 1) double;
+        positions (:, 3) double;
+    end
+
+    % Find positions for this agent's assigned partition in the domain
+    idx = partitioning == agent.index;
+    positions = [sensingObjective.X(idx), sensingObjective.Y(idx), zeros(size(sensingObjective.X(idx)))];
+
+    % Evaluate objective function at every point in this agent's
+    % assigned partiton
+    values = sensingObjective.values(idx);
+end