reorganized code into separate files

geometries/@cone/cone.m

@@ -0,0 +1,22 @@
+classdef cone
+    % Conical geometry
+    properties (SetAccess = private, GetAccess = public)
+        % Meta
+        tag = REGION_TYPE.INVALID;
+        label = "";
+
+        % Spatial
+        center = NaN;
+        radius = NaN;
+        height = NaN;
+
+        % Plotting
+        surface;
+        n = 32;
+    end
+
+    methods (Access = public)
+        [obj   ] = initialize(obj, center, radius, height, tag, label);
+        [obj, f] = plot(obj, ind, f);
+    end
+end