Lissajous Curve

lissajous.py

@@ -0,0 +1,41 @@
+#!/usr/bin/env python
+
+from game import *
+from math import sin, pi
+
+class Lissajous(Game):
+    def __init__(self, fx, fy):
+        self.fx = fx
+        self.fy = fy
+        self.width = 1000
+        self.height = 600
+        self.time = 0
+        self.old_point = self.get_pos()
+        self.new_point = self.old_point
+        self.reset = False
+        super(Lissajous, self).__init__(self.width, self.height, 100)
+
+    def get_pos(self):
+        return ( int( (1+sin(2*pi*self.fx*self.time)) / 2 * self.width), int( (1+sin(2*pi*self.fy*self.time)) / 2 * self.height) )
+
+    def on_update(self, dtime):
+
+        self.old_point = self.new_point
+        self.time += dtime
+        self.new_point = self.get_pos()
+
+    def on_render(self, srfc):
+        WHITE = (255,255,255)
+        BLACK = (0,0,0)
+        if self.reset:
+            srfc.fill(BLACK)
+            self.reset = False
+        pygame.draw.line( srfc, WHITE, self.old_point, self.new_point )
+
+    def on_event(self, event):
+        if event.type == MOUSEBUTTONDOWN and event.button == 1:
+            self.reset = True
+
+if __name__ == "__main__":
+    Lissajous(0.5,0.325).on_execute()
+