Added a few example scenes

.gitignore

@@ -1,2 +1,7 @@
 *.pyc
 animation_files/
+.DS_Store
+homeless.py
+ka_playgrounds/
+playground.py
+prettiness_hall_of_fame.py

README.md

@@ -27,16 +27,6 @@ cd aggdraw-64bits
 ```
 
 ## How to Use
-Not exactly sure. I think I'm supposed to run `python extract_scene.py
-generate_logo.py`, but that fails with the following error.
+Try running the following:
+python extract_scene.py -p example_scenes.py SquareToCircle
 
-```
-Traceback (most recent call last):
-  File "extract_scene.py", line 205, in main
-    handle_scene(SceneClass(**scene_kwargs), **config)
-  File "/Users/scott/scratch/manim/scene/scene.py", line 32, in __init__
-    self.construct(*self.construct_args)
-  File "/Users/scott/scratch/manim/./generate_logo.py", line 50, in construct
-    self.interpolation_factor
-TypeError: interpolate() takes exactly 5 arguments (4 given)
-```

example_scenes.py

@@ -25,7 +25,7 @@ from mobject.vectorized_mobject import *
 
 
 ## To watch one of these scenes, run the following:
-## python extract_scene.py -p <SceneName>
+## python extract_scenes.py -p <SceneName>
 
 class SquareToCircle(Scene):
     def construct(self):
@@ -35,8 +35,18 @@ class SquareToCircle(Scene):
         self.play(Transform(square, circle))
         self.dither()
 
+class WarpSquare(Scene):
+    def construct(self):
+        square = Square()
+        self.play(ApplyPointwiseFunction(
+            lambda (x, y, z) : complex_to_R3(np.exp(complex(x, y))),
+            square
+        ))
+        self.dither()
 
 
-
+class WriteStuff(Scene):
+    def construct(self):
+        self.play(Write(TextMobject("Stuff").scale(3)))