Added theta multiplier feature in GUI

spirographs.py

@@ -24,7 +24,7 @@ class spirographs:
         self.bigRadius = 12
         self.smallRadius = 5
         self.distance = 4
-        self.rotations = 8
+        self.rotations = 2
         self.highestTheta = (np.lcm(self.smallRadius, self.bigRadius)/self.bigRadius) * self.rotations * math.pi
         self.stepSize = self.highestTheta / 4096
         # update initial slider positions
@@ -107,6 +107,24 @@ class spirographs:
             return
         self.distanceAdjustment.set_value(self.distance)
 
+    def thetaMultiplier_changed_cb(self, widget):
+        indexValue = widget.get_active()
+        if indexValue == 0:
+            self.rotations = 2
+        elif indexValue == 1:
+            self.rotations = 4
+        elif indexValue == 2:
+            self.rotations = 8
+        elif indexValue == 3:
+            self.rotations = 16
+        elif indexValue == 4: # automatic not set up yet
+            self.rotations = 2 # back to default
+        self.highestTheta = (np.lcm(int(self.smallRadius + 0.5), int(self.bigRadius + 0.5))/self.bigRadius) * self.rotations * math.pi
+        self.stepSize = self.highestTheta / 4096 # possibly multiply by number of rotations?
+        self.recalcPoints()
+        self.updatePlot()
+        return
+
     def recalcPoints(self):
         self.epiX = np.array([self.calcEpiX(i) for i in np.arange(0, self.highestTheta, self.stepSize)])
         self.epiY = np.array([self.calcEpiY(i) for i in np.arange(0, self.highestTheta, self.stepSize)])