From 20d0194074ffc4d5618241fbf622d684ed69ee9b Mon Sep 17 00:00:00 2001 From: alembcke <79891353+alembcke@users.noreply.github.com> Date: Thu, 25 Jul 2024 14:46:15 -0400 Subject: [PATCH] Added `colorscale` to `axes.plot()` (#3148) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit * add colorscale to plot * Update manim/mobject/graphing/coordinate_systems.py Co-authored-by: Benjamin Hackl * updated typing and moved one line * added test * fix input_to_graph_point error * Performance improvement by using cairo color drawing * Add OpenGL support * Add OpenGL tests and split test for x and y axis for more behavior coverage * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Updated gradient_line tests * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci --------- Co-authored-by: Benjamin Hackl Co-authored-by: MrDiver Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com> Co-authored-by: Francisco Manríquez Novoa <49853152+chopan050@users.noreply.github.com> Co-authored-by: chopan --- manim/mobject/graphing/coordinate_systems.py | 59 ++++++++++++++++++ ...aph_x_axis_using_opengl_renderer[None].npz | Bin 0 -> 13887 bytes ...aph_y_axis_using_opengl_renderer[None].npz | Bin 0 -> 13292 bytes tests/opengl/test_coordinate_system_opengl.py | 34 ++++++++++ .../gradient_line_graph_x_axis.npz | Bin 0 -> 13887 bytes .../gradient_line_graph_y_axis.npz | Bin 0 -> 13292 bytes .../test_coordinate_systems.py | 30 +++++++++ 7 files changed, 123 insertions(+) create mode 100644 tests/opengl/control_data/coordinate_system_opengl/gradient_line_graph_x_axis_using_opengl_renderer[None].npz create mode 100644 tests/opengl/control_data/coordinate_system_opengl/gradient_line_graph_y_axis_using_opengl_renderer[None].npz create mode 100644 tests/test_graphical_units/control_data/coordinate_system/gradient_line_graph_x_axis.npz create mode 100644 tests/test_graphical_units/control_data/coordinate_system/gradient_line_graph_y_axis.npz diff --git a/manim/mobject/graphing/coordinate_systems.py b/manim/mobject/graphing/coordinate_systems.py index 435d7aced8..5730862118 100644 --- a/manim/mobject/graphing/coordinate_systems.py +++ b/manim/mobject/graphing/coordinate_systems.py @@ -48,6 +48,7 @@ ManimColor, ParsableManimColor, color_gradient, + interpolate_color, invert_color, ) from manim.utils.config_ops import merge_dicts_recursively, update_dict_recursively @@ -628,6 +629,8 @@ def plot( function: Callable[[float], float], x_range: Sequence[float] | None = None, use_vectorized: bool = False, + colorscale: Union[Iterable[Color], Iterable[Color, float]] | None = None, + colorscale_axis: int = 1, **kwargs: Any, ) -> ParametricFunction: """Generates a curve based on a function. @@ -641,6 +644,12 @@ def plot( use_vectorized Whether to pass in the generated t value array to the function. Only use this if your function supports it. Output should be a numpy array of shape ``[y_0, y_1, ...]`` + colorscale + Colors of the function. Optional parameter used when coloring a function by values. Passing a list of colors + and a colorscale_axis will color the function by y-value. Passing a list of tuples in the form ``(color, pivot)`` + allows user-defined pivots where the color transitions. + colorscale_axis + Defines the axis on which the colorscale is applied (0 = x, 1 = y), default is y-axis (1). kwargs Additional parameters to be passed to :class:`~.ParametricFunction`. @@ -719,7 +728,57 @@ def log_func(x): use_vectorized=use_vectorized, **kwargs, ) + graph.underlying_function = function + + if colorscale: + if type(colorscale[0]) in (list, tuple): + new_colors, pivots = [ + [i for i, j in colorscale], + [j for i, j in colorscale], + ] + else: + new_colors = colorscale + + ranges = [self.x_range, self.y_range] + pivot_min = ranges[colorscale_axis][0] + pivot_max = ranges[colorscale_axis][1] + pivot_frequency = (pivot_max - pivot_min) / (len(new_colors) - 1) + pivots = np.arange( + start=pivot_min, + stop=pivot_max + pivot_frequency, + step=pivot_frequency, + ) + + resolution = 0.01 if len(x_range) == 2 else x_range[2] + sample_points = np.arange(x_range[0], x_range[1] + resolution, resolution) + color_list = [] + for samp_x in sample_points: + axis_value = (samp_x, function(samp_x))[colorscale_axis] + if axis_value <= pivots[0]: + color_list.append(new_colors[0]) + elif axis_value >= pivots[-1]: + color_list.append(new_colors[-1]) + else: + for i, pivot in enumerate(pivots): + if pivot > axis_value: + color_index = (axis_value - pivots[i - 1]) / ( + pivots[i] - pivots[i - 1] + ) + color_index = min(color_index, 1) + mob_color = interpolate_color( + new_colors[i - 1], + new_colors[i], + color_index, + ) + color_list.append(mob_color) + break + if config.renderer == RendererType.OPENGL: + graph.set_color(color_list) + else: + graph.set_stroke(color_list) + graph.set_sheen_direction(RIGHT) + return graph def plot_implicit_curve( diff --git a/tests/opengl/control_data/coordinate_system_opengl/gradient_line_graph_x_axis_using_opengl_renderer[None].npz b/tests/opengl/control_data/coordinate_system_opengl/gradient_line_graph_x_axis_using_opengl_renderer[None].npz new file mode 100644 index 0000000000000000000000000000000000000000..6efda8b2e032e2345f95cde379bb75301ffd45b1 GIT binary patch literal 13887 zcmdUWXIPWj+U|>N^cxvqEC^C{RFFPM@46je5JM3n&47Z4bR!)?V00@TRGQMIg-}9o z0Rl=>st}q~O{4`v2qE;qS#j_0wBP5?(M#}Jznaa;!5OwB6690>tqX+es+_J{B z|1vJWbteD$vEdt)7oxA8l=eS$Lto!1wnaZq$J~k5qGpz-2v7XY;`VHf+OB&~`lFGe z)}!gKT(I2Nx=jJuI*S@FuY5DGB5$`Ig^rXv=rIsrNUi=_D4a&v zU&G`6J&48HZ(P*bpd8%P$j=!M^Gp+? zCot~aeF4yQM1A7`yo~i^;N<<4$7c7=mao+rH-~-8Le78s@Q%h2j`#4%EV14Hp26QX zhGZ^%aJ85h`O$JoH|kq8?PxLwC?}7svtFhIs;Xp$F}Z_ zX+e~#O&xf3fKfU{VV`!6m8SZ$^U#<7`W8X^(O;v?uqZAaX{9+%$U_jp^{R|B#Mge@ zvXRge%m-C`2gCgL)VxoJ>D;fc!9E@5Siqg=3kKBLJ*qF{R8q4LU2_uJ*Fzq2mZ60HCS{tZS(PXjw}NPwG|TK zke#8c`GaO=J)jGxW5&m^<- z;WR8h2=gA81X5K1OE^;}ifs;9Z3rT6Z*BFLp^66epL7ZUos2r39#ZPQ2`rsbwyTuu zuHViUBt08Jz)G8d-OH@z!q+1)%Q!n5teZ0Y6jx5gYQUGI8zmjJ##~=y>c-r;#8o7X03$tww zTlb<*u?qE_H&#l)(so&3X>Fn8v)v^jv8L(L0R*?(Q|I1!AA{<6!Mx>@+$Tu{qjq9p zk48hlBAZ#e1Te$bg*p*{un0vyJnGwqAiGr1rpyTOy&dc}UV|0OR=pO@&3%onbOf*m zInHfLd)8iEiCV1UBVj-se)E$MTWWQLj8GSCD?3ef)NbE2Ml7zEZK{WCsT(Aiw@CXw zUETW;t3pTC>Pr4@<7|su_xI&*dnqL)8!K6ua64Vv?W8GOE$O z=M22z6Ohh2Op=%KdUK?-2D>)t+`ZWdw*k^sVM?H}!3-}dIXhzDRug6Zt5e<$q&ZvV zX*aAmP<7L+kt4!mgXV1CQPb^rf@LeIj|jg&MH*o3u<;V3pytN=w!54+s8Ar;KW7>Ho(Twa;H3n~;$3^Wdk6T$A%G&Zem;Y9@^jg1|QmS(47d36J4j z51hY`{!eDRu=G&P9PqwlqjR8#0HZABkzxW$zL@vo9>wI6&qfHS~ z3B=8Y5e`eZ_F&%+#$1nmZ(fWA@qOEhW0#aym{$yD63L zCFyQYO9h8jfSDk14CwH<-y6L{&CMic?Jd4eBt;%(vQx`C&6nTIBF=M8_AqeiUpwEH zKGWAuB|6%d`?Eb_=Q5Bh%AY!^d5G@lsKFlk?{vJKZG;04gLLC?$K2AM*H5X=YPqH6 zVwf! 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