Note
Go to the end to download the full example code
01 - Full Mandelbrot basic example
This basic example shows how to create a color layer, displaying the “continuous iteration number” for Mandelbrot (power 2) fractal.
The full Mandelbrot set is diplayed here.
Reference:
fractalshades.models.Mandelbrot
import os
import fractalshades as fs
import fractalshades.models as fsm
import fractalshades.colors as fscolors
import fractalshades.projection
from fractalshades.postproc import (
Postproc_batch,
Continuous_iter_pp,
Raw_pp,
)
from fractalshades.colors.layers import (
Color_layer,
Bool_layer,
)
def plot(plot_dir):
"""
A very simple example: full view of the Mandelbrot set with escape-time
coloring
"""
fs.settings.enable_multithreading = False
fs.settings.log_directory = os.path.join(plot_dir, "log")
fs.set_log_handlers(verbosity="debug @ console + log")
# Define the parameters for this calculation
x = -1.0
y = -0.0
dx = 5.
nx = 2400
calc_name="mandelbrot"
colormap = fscolors.cmap_register["classic"]
# Run the calculation
f = fsm.Mandelbrot(plot_dir)
f.zoom(x=x, y=y, dx=dx, nx=nx, xy_ratio=1.0,
projection=fs.projection.Cartesian(),
theta_deg=0.)
f.calc_std_div(
calc_name=calc_name,
subset=None,
max_iter=1000,
M_divergence=1000.,
epsilon_stationnary= 0.001,
)
# Plot the image
pp = Postproc_batch(f, calc_name)
pp.add_postproc("cont_iter", Continuous_iter_pp())
pp.add_postproc("interior", Raw_pp("stop_reason", func="x != 1."))
plotter = fs.Fractal_plotter(pp)
plotter.add_layer(Bool_layer("interior", output=False))
plotter.add_layer(Color_layer(
"cont_iter",
func="np.log(x)",
colormap=colormap,
probes_z=[1., 3.],
output=True
))
plotter["cont_iter"].set_mask(
plotter["interior"],
mask_color=(0.1, 0.1, 0.1)
)
plotter.plot()
if __name__ == "__main__":
# Some magic to get the directory for plotting: with a name that matches
# the file or a temporary dir if we are building the documentation
try:
realpath = os.path.realpath(__file__)
plot_dir = os.path.splitext(realpath)[0]
plot(plot_dir)
except NameError:
import tempfile
with tempfile.TemporaryDirectory() as plot_dir:
fs.utils.exec_no_output(plot, plot_dir)
Total running time of the script: ( 0 minutes 5.407 seconds)