Logo (#537)

Add the graph created by @Elteoremadebeethoven as a logo

README.md

@@ -1,4 +1,5 @@
-# Manim - Mathematical Animation Engine
+<img src="logo/cropped.png"/>
+
 [![Documentation Status](https://readthedocs.org/projects/manim/badge/?version=latest)](https://manim.readthedocs.io/en/latest/?badge=latest)
 [![Build Status](https://travis-ci.org/3b1b/manim.svg?branch=master)](https://travis-ci.org/3b1b/manim)
 [![MIT License](https://img.shields.io/badge/license-MIT-blue.svg?style=flat)](http://choosealicense.com/licenses/mit/)

logo/logo.py

@@ -0,0 +1,176 @@
+from manimlib.imports import *
+
+NEW_BLUE = "#68a8e1"
+
+class Thumbnail(GraphScene):
+    CONFIG = {
+        "y_max": 8,
+        "y_axis_height": 5,
+    }
+
+    def construct(self):
+        self.show_function_graph()
+
+    def show_function_graph(self):
+        self.setup_axes(animate=False)
+        def func(x):
+            return 0.1 * (x + 3-5) * (x - 3-5) * (x-5) + 5
+
+        def rect(x):
+            return 2.775*(x-1.5)+3.862
+        recta = self.get_graph(rect,x_min=-1,x_max=5)
+        graph = self.get_graph(func,x_min=0.2,x_max=9)
+        graph.set_color(NEW_BLUE)
+        input_tracker_p1 = ValueTracker(1.5)
+        input_tracker_p2 = ValueTracker(3.5)
+
+        def get_x_value(input_tracker):
+            return input_tracker.get_value()
+
+        def get_y_value(input_tracker):
+            return graph.underlying_function(get_x_value(input_tracker))
+
+        def get_x_point(input_tracker):
+            return self.coords_to_point(get_x_value(input_tracker), 0)
+
+        def get_y_point(input_tracker):
+            return self.coords_to_point(0, get_y_value(input_tracker))
+
+        def get_graph_point(input_tracker):
+            return self.coords_to_point(get_x_value(input_tracker), get_y_value(input_tracker))
+
+        def get_v_line(input_tracker):
+            return DashedLine(get_x_point(input_tracker), get_graph_point(input_tracker), stroke_width=2)
+
+        def get_h_line(input_tracker):
+            return DashedLine(get_graph_point(input_tracker), get_y_point(input_tracker), stroke_width=2)
+        # 
+        input_triangle_p1 = RegularPolygon(n=3, start_angle=TAU / 4)
+        output_triangle_p1 = RegularPolygon(n=3, start_angle=0)
+        for triangle in input_triangle_p1, output_triangle_p1:
+            triangle.set_fill(WHITE, 1)
+            triangle.set_stroke(width=0)
+            triangle.scale(0.1)
+        # 
+        input_triangle_p2 = RegularPolygon(n=3, start_angle=TAU / 4)
+        output_triangle_p2 = RegularPolygon(n=3, start_angle=0)
+        for triangle in input_triangle_p2, output_triangle_p2:
+            triangle.set_fill(WHITE, 1)
+            triangle.set_stroke(width=0)
+            triangle.scale(0.1)
+        
+        # 
+        x_label_p1 = TexMobject("a")
+        output_label_p1 = TexMobject("f(a)")
+        x_label_p2 = TexMobject("b")
+        output_label_p2 = TexMobject("f(b)")
+        v_line_p1 = get_v_line(input_tracker_p1)
+        v_line_p2 = get_v_line(input_tracker_p2)
+        h_line_p1 = get_h_line(input_tracker_p1)
+        h_line_p2 = get_h_line(input_tracker_p2)
+        graph_dot_p1 = Dot(color=WHITE)
+        graph_dot_p2 = Dot(color=WHITE)
+
+        # reposition mobjects
+        x_label_p1.next_to(v_line_p1, DOWN)
+        x_label_p2.next_to(v_line_p2, DOWN)
+        output_label_p1.next_to(h_line_p1, LEFT)
+        output_label_p2.next_to(h_line_p2, LEFT)
+        input_triangle_p1.next_to(v_line_p1, DOWN, buff=0)
+        input_triangle_p2.next_to(v_line_p2, DOWN, buff=0)
+        output_triangle_p1.next_to(h_line_p1, LEFT, buff=0)
+        output_triangle_p2.next_to(h_line_p2, LEFT, buff=0)
+        graph_dot_p1.move_to(get_graph_point(input_tracker_p1))
+        graph_dot_p2.move_to(get_graph_point(input_tracker_p2))
+
+
+        #
+        self.play(
+            ShowCreation(graph),
+        )
+        # Animacion del punto a
+        self.add_foreground_mobject(graph_dot_p1)
+        self.add_foreground_mobject(graph_dot_p2)
+        self.play(
+            DrawBorderThenFill(input_triangle_p1),
+            Write(x_label_p1),
+            ShowCreation(v_line_p1),
+            GrowFromCenter(graph_dot_p1),
+            ShowCreation(h_line_p1),
+            Write(output_label_p1),
+            DrawBorderThenFill(output_triangle_p1),
+            DrawBorderThenFill(input_triangle_p2),
+            Write(x_label_p2),
+            ShowCreation(v_line_p2),
+            GrowFromCenter(graph_dot_p2),
+            ShowCreation(h_line_p2),
+            Write(output_label_p2),
+            DrawBorderThenFill(output_triangle_p2),
+            run_time=0.5
+        )
+        self.add(
+            input_triangle_p2,
+            x_label_p2,
+            graph_dot_p2,
+            v_line_p2,
+            h_line_p2,
+            output_triangle_p2,
+            output_label_p2,
+        )
+        ###################
+        pendiente_recta = self.get_secant_slope_group(
+            1.9, recta, dx = 1.4,
+            df_label = None,
+            dx_label = None,
+            dx_line_color = PURPLE,
+            df_line_color= ORANGE,
+            )
+        grupo_secante = self.get_secant_slope_group(
+            1.5, graph, dx = 2,
+            df_label = None,
+            dx_label = None,
+            dx_line_color = "#942357",
+            df_line_color= "#3f7d5c",
+            secant_line_color = RED,
+        )
+
+
+        self.add(
+            input_triangle_p2,
+            graph_dot_p2,
+            v_line_p2,
+            h_line_p2,
+            output_triangle_p2,
+        )
+        self.play(FadeIn(grupo_secante))
+
+        kwargs = {
+            "x_min" : 4,
+            "x_max" : 9,
+            "fill_opacity" : 0.75,
+            "stroke_width" : 0.25,
+        }
+        self.graph=graph
+        iteraciones=6
+
+
+        self.rect_list = self.get_riemann_rectangles_list(
+            graph, iteraciones,start_color=PURPLE,end_color=ORANGE, **kwargs
+        )
+        flat_rects = self.get_riemann_rectangles(
+            self.get_graph(lambda x : 0), dx = 0.5,start_color=invert_color(PURPLE),end_color=invert_color(ORANGE),**kwargs
+        )
+        rects = self.rect_list[0]
+        self.transform_between_riemann_rects(
+            flat_rects, rects, 
+            replace_mobject_with_target_in_scene = True,
+            run_time=0.9
+        )
+
+        # adding manim
+        picture = Group(*self.mobjects)
+        picture.scale(0.6).to_edge(LEFT, buff=SMALL_BUFF)
+        manim = TextMobject("Manim").set_height(1.5) \
+                                    .next_to(picture, RIGHT) \
+                                    .shift(DOWN * 0.7)
+        self.add(manim)