Beginning alt_calc project

active_projects/alt_calc.py

@@ -0,0 +1,73 @@
+from big_ol_pile_of_manim_imports import *
+
+
+class NumberlineTransformationScene(Scene):
+    CONFIG = {
+
+    }
+
+    def setup(self):
+        pass
+
+
+class ExampleNumberlineTransformationScene(NumberlineTransformationScene):
+    def construct(self):
+        pass
+
+# Scenes
+
+
+class WriteOpeningWords(Scene):
+    def construct(self):
+        raw_string1 = "Dear calculus student,"
+        raw_string2 = "You're about to go through your first course. Like " + \
+                      "any new topic, it will take some hard work to understand,"
+        words1, words2 = [
+            TextMobject("\\Large", *rs.split(" "))
+            for rs in raw_string1, raw_string2
+        ]
+        words1.next_to(words2, UP, aligned_edge=LEFT, buff=LARGE_BUFF)
+        words = VGroup(*it.chain(words1, words2))
+        words.scale_to_fit_width(FRAME_WIDTH - 2 * LARGE_BUFF)
+        words.to_edge(UP)
+
+        letter_wait = 0.05
+        word_wait = 2 * letter_wait
+        comma_wait = 5 * letter_wait
+        for word in words:
+            self.play(LaggedStart(
+                FadeIn, word,
+                run_time=len(word) * letter_wait,
+                lag_ratio=1.5 / len(word)
+            ))
+            self.wait(word_wait)
+            if word.get_tex_string()[-1] == ",":
+                self.wait(comma_wait)
+
+
+class StartingCalc101(PiCreatureScene):
+    CONFIG = {
+        # "default_pi_creature_kwargs": {
+        #     "color": BLUE,
+        #     "flip_at_start": False,
+        # },
+    }
+
+    def construct(self):
+        randy = self.pi_creature
+        deriv_string = "\\frac{df}{dx}(x) = \\lim(\\delta x \\to \\infty)" + \
+                       "{f(x + \\delta x) - f(x) \\over \\delta x}"
+        equations = VGroup(
+            TexMobject(*break_up_string_by_terms(deriv_string, "\\delta x"))
+        )
+        title = TextMobject("Calculus 101")
+        title.to_edge(UP)
+        h_line = Line(LEFT, RIGHT)
+        h_line.scale_to_fit_width(FRAME_WIDTH - LARGE_BUFF)
+        h_line.next_to(title, DOWN)
+
+        self.add(title, h_line)
+        self.play(randy.change, "erm", title)
+        self.wait()
+
+