reorganized code into separate files

geometries/@rectangularPrism/containsLine.m

@@ -0,0 +1,41 @@
+function c = containsLine(obj, pos1, pos2)
+    arguments (Input)
+        obj (1, 1) {mustBeA(obj, 'rectangularPrism')};
+        pos1 (1, 3) double;
+        pos2 (1, 3) double;
+    end
+    arguments (Output)
+        c (1, 1) logical
+    end
+    
+    d = pos2 - pos1;
+    
+    % edge case where the line is parallel to the geometry
+    if abs(d) < 1e-12
+        % check if it happens to start or end inside or outside of
+        % the geometry
+        if obj.contains(pos1) || obj.contains(pos2)
+            c = true;
+        else
+            c = false;
+        end
+        return;
+    end
+    
+    tmin = -inf;        
+    tmax = inf;
+    
+    % Standard case
+    for ii = 1:3
+        t1 = (obj.minCorner(ii) - pos1(ii)) / d(ii);
+        t2 = (obj.maxCorner(ii) - pos2(ii)) / d(ii);
+        tmin = max(tmin, min(t1, t2));
+        tmax = min(tmax, max(t1, t2));
+        if tmin > tmax
+            c = false;
+            return;
+        end
+    end
+    
+    c = (tmax >= 0) && (tmin <= 1);
+    end