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update docs
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Tony031218
@ -322,6 +322,85 @@ class UpdatersExample(Scene):
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self.wait(4 * PI)
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class CoordinateSystemExample(Scene):
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def construct(self):
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axes = Axes(
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# x-axis ranges from -1 to 10, with a default step size of 1
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x_range=(-1, 10),
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# y-axis ranges from -2 to 10 with a step size of 0.5
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y_range=(-2, 2, 0.5),
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# The axes will be stretched so as to match the specified
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# height and width
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height=6,
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width=10,
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# Axes is made of two NumberLine mobjects. You can specify
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# their configuration with axis_config
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axis_config={
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"stroke_color": GREY_A,
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"stroke_width": 2,
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},
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# Alternatively, you can specify configuration for just one
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# of them, like this.
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y_axis_config={
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"include_tip": False,
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}
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)
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# Keyword arguments of add_coordinate_labels can be used to
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# configure the DecimalNumber mobjects which it creates and
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# adds to the axes
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axes.add_coordinate_labels(
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font_size=20,
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num_decimal_places=1,
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)
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self.add(axes)
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# Axes descends from the CoordinateSystem class, meaning
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# you can call call axes.coords_to_point, abbreviated to
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# axes.c2p, to associate a set of coordinates with a point,
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# like so:
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dot = Dot(color=RED)
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dot.move_to(axes.c2p(0, 0))
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self.play(FadeIn(dot, scale=0.5))
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self.play(dot.move_to, axes.c2p(3, 2))
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self.wait()
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self.play(dot.move_to, axes.c2p(5, 0.5))
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self.wait()
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# Similarly, you can call axes.point_to_coords, or axes.p2c
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# print(axes.p2c(dot.get_center()))
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# We can draw lines from the axes to better mark the coordinates
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# of a given point.
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# Here, the always_redraw command means that on each new frame
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# the lines will be redrawn
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h_line = always_redraw(lambda: axes.get_h_line(dot.get_left()))
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v_line = always_redraw(lambda: axes.get_v_line(dot.get_bottom()))
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self.play(
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ShowCreation(h_line),
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ShowCreation(v_line),
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)
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self.play(dot.move_to, axes.c2p(3, -2))
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self.wait()
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self.play(dot.move_to, axes.c2p(1, 1))
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self.wait()
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# If we tie the dot to a particular set of coordinates, notice
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# that as we move the axes around it respects the coordinate
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# system defined by them.
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f_always(dot.move_to, lambda: axes.c2p(1, 1))
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self.play(
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axes.scale, 0.75,
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axes.to_corner, UL,
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run_time=2,
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)
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self.wait()
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self.play(FadeOut(VGroup(axes, dot, h_line, v_line)))
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# Other coordinate systems you can play around with include
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# ThreeDAxes, NumberPlane, and ComplexPlane.
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class GraphExample(Scene):
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def construct(self):
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axes = Axes((-3, 10), (-1, 8))
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@ -403,85 +482,6 @@ class GraphExample(Scene):
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self.wait()
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class CoordinateSystemExample(Scene):
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def construct(self):
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axes = Axes(
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# x-axis ranges from -1 to 10, with a default step size of 1
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x_range=(-1, 10),
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# y-axis ranges from -2 to 10 with a step size of 0.5
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y_range=(-2, 2, 0.5),
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# The axes will be stretched so as to match the specified
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# height and width
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height=6,
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width=10,
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# Axes is made of two NumberLine mobjects. You can specify
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# their configuration with axis_config
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axis_config={
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"stroke_color": GREY_A,
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"stroke_width": 2,
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},
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# Alternatively, you can specify configuration for just one
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# of them, like this.
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y_axis_config={
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"include_tip": False,
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}
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)
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# Keyword arguments of add_coordinate_labels can be used to
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# configure the DecimalNumber mobjects which it creates and
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# adds to the axes
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axes.add_coordinate_labels(
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font_size=20,
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num_decimal_places=1,
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)
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self.add(axes)
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# Axes descends from the CoordinateSystem class, meaning
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# you can call call axes.coords_to_point, abbreviated to
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# axes.c2p, to associate a set of coordinates with a point,
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# like so:
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dot = Dot(color=RED)
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dot.move_to(axes.c2p(0, 0))
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self.play(FadeIn(dot, scale=0.5))
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self.play(dot.move_to, axes.c2p(3, 2))
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self.wait()
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self.play(dot.move_to, axes.c2p(5, 0.5))
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self.wait()
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# Similarly, you can call axes.point_to_coords, or axes.p2c
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# print(axes.p2c(dot.get_center()))
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# We can draw lines from the axes to better mark the coordinates
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# of a given point.
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# Here, the always_redraw command means that on each new frame
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# the lines will be redrawn
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h_line = always_redraw(lambda: axes.get_h_line(dot.get_left()))
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v_line = always_redraw(lambda: axes.get_v_line(dot.get_bottom()))
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self.play(
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ShowCreation(h_line),
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ShowCreation(v_line),
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)
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self.play(dot.move_to, axes.c2p(3, -2))
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self.wait()
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self.play(dot.move_to, axes.c2p(1, 1))
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self.wait()
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# If we tie the dot to a particular set of coordinates, notice
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# that as we move the axes around it respects the coordinate
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# system defined by them.
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f_always(dot.move_to, lambda: axes.c2p(1, 1))
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self.play(
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axes.scale, 0.75,
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axes.to_corner, UL,
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run_time=2,
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)
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self.wait()
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self.play(FadeOut(VGroup(axes, dot, h_line, v_line)))
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# Other coordinate systems you can play around with include
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# ThreeDAxes, NumberPlane, and ComplexPlane.
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class SurfaceExample(Scene):
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CONFIG = {
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"camera_class": ThreeDCamera,
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