moved all functions to utils

utils.py

@@ -0,0 +1,31 @@
+import numpy as np
+import matplotlib.pyplot as plt
+
+def getSquareY(x):
+    if x==-1 or x == 1:
+        return 0
+    else:
+        return 1
+
+getSquareYVectorised = np.vectorize(getSquareY)
+
+def getCircle(x):
+    return np.sqrt(1-np.square(x))
+
+def transform(x,y,t):
+    points = np.array([x,y])
+    result = t @ points
+    return result[0,:], result[1,:]
+
+def plotGridLines(xlim,ylim,t):
+    for i in range(xlim[0]-20,xlim[1]+21):
+        x = [i,i]
+        y = [ylim[0]-20,ylim[1]+20]
+        x,y = transform(x,y,t)
+        plt.plot(x,y, color='#DAD5D4',linestyle='dashed',linewidth=0.5)
+    for i in range(ylim[0]-20,ylim[1]+21):
+        y = [i,i]
+        x = [xlim[0]-20,xlim[1]+20]
+        x,y = transform(x,y,t)
+        plt.plot(x,y, color='#DAD5D4',linestyle='dashed',linewidth=0.5)
+