Refactored scene

generate_logo.py

@@ -0,0 +1,71 @@
+
+
+
+from animation.transform import Transform
+from mobject import Mobject
+from mobject.tex_mobject import TextMobject
+from topics.geometry import Circle
+from topics.three_dimensions import Sphere
+from scene import Scene
+
+from helpers import *
+
+
+class LogoGeneration(Scene):
+    DEFAULT_CONFIG = {
+        "radius"               : 1.5,
+        "inner_radius_ratio"   : 0.55,
+        "circle_density"       : 100,
+        "circle_blue"          : "skyblue",
+        "circle_brown"         : DARK_BROWN,
+        "circle_repeats"       : 5,
+        "sphere_density"       : 50,
+        "sphere_blue"          : DARK_BLUE,
+        "sphere_brown"         : LIGHT_BROWN,
+        "interpolation_factor" : 0.3,
+        "frame_duration"       : 0.01,
+    }
+
+    def construct(self):
+        digest_config(self, {})
+        circle = Circle(
+            density = self.circle_density, 
+            color   = self.circle_blue
+        )
+        circle.repeat(self.circle_repeats)
+        circle.scale(self.radius)
+        sphere = Sphere(
+            density = self.sphere_density, 
+            color   = self.sphere_blue
+        )
+        sphere.scale(self.radius)
+        sphere.rotate(-np.pi / 7, [1, 0, 0])
+        sphere.rotate(-np.pi / 7)
+        iris = Mobject()
+        Mobject.interpolate(
+            circle, sphere, iris, 
+            self.interpolation_factor
+        )
+        for mob, color in [(iris, self.sphere_brown), (circle, self.circle_brown)]:
+            mob.highlight(color, lambda (x, y, z) : x < 0 and y > 0)
+            mob.highlight(
+                "black", 
+                lambda point: np.linalg.norm(point) < \
+                              self.inner_radius_ratio*self.radius
+            )
+        name = TextMobject("3Blue1Brown").center()
+        name.highlight("grey")
+        name.shift(2*DOWN)
+
+        self.play(Transform(
+            circle, iris, 
+            run_time = DEFAULT_ANIMATION_RUN_TIME
+        ))
+        self.frames = drag_pixels(self.frames)
+        self.set_frame_as_background()
+        self.save_image()
+        self.add(name)
+        self.dither()
+        print "Dragging pixels..."
+
+