semuconsulting/pymandel

Mandelbrot and Julia Set GUI application written in Python & Tkinter

pymandel's Issues

pymandelcli: Weird behavior with Gray Scale Theme at certain zoom level

Describe the bug
I noticed a weird behavior when generating a Mandelbrot zoom with the pymandelcli and the Grayscale color theme. Somehow, the picture gets really messed up when it reaches a certain zoom level (see images below). I tried different zoom increments and zoom starting points (<1), but was always getting this weird blob (image 10).
The bug was not reproducible in the GUI.

To Reproduce

1. Run the commandpymandelcli filename="zoom" width=3840 height=1080 frames=50 zoom=0.7 zoominc=1.04 zxoffset=-1.401155189 zyoffset=0 theme="BasicGrayscale"

Screenshots
Here are some images:
At the start of the generation, all looks fine:

Then it gets progressively worse (Image 8 - 10).

After that, the pictures slowly return to normal (Image 11 - 12)

Desktop:

• OS: Ubuntu 22.04
• Version v1.0.8

pymandelcli not zooming to the right places

For some reason, when I tried recreating the animation from the README using pymandeCLI, the pictures quickly started zooming into an unexpected part of the Mandelbrot set and quickly turned all black. I tried the same offsets in the pymandel app and it worked fine.

After installation, I typed this into the command line:

pymandelcli filename="zoom" width=400 height=300 frames=178 zoom=0.75 zoominc=1.2 zxoffset=-0.743643887037158704752191506114774 zyoffset=0.131825904205311970493132056385139 theme="Colorcet_CET_C1"

And here's what I got:

Attatched are the 16th and 24th generated images to show that its not zooming right.

This could totally be my own mistake somewhere from lack of experience, but if its a bug hopefully this will alert you of it. I'm on MacOS Big Sur