G Code Plotting Python

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Matplotlib recognizes the following formats in the table below to specify acolor.

Python

Oct 10, 2019 Generate G code from Image using Inkscape and Python November 25, 2019 October 10, 2019 by blag0je91 Couple of week ago, I started working on homemade CNC plotter that uses stepper motors form old CD/DVD drives. See full list on blog.thegaragelab.com. Jul 03, 2021 In order to mirror it you just need to swap out the X coordinates in your G code, If (0,0) is the center of your bed, as is often (but not always) the case for delta printers you will just want to negate the X, so G1 X30 Y-3 Z2 becomes G1 X-30 Y-3 Z2. If your corrdinates have (0,0) in a corner (often the case for orthogonal printers) then you. May 20, 2019 However this is intended as a minimal guide to understand a minimal set of codes needed for 2D plotting. G-Codes for 2D Plotting. To get an idea of how G-codes work, let me first show you the beginning of an example file.% G90 G49 M3 S15000 G0 X20.456 Y20.910 Z15.000 G1 Z35.000 F2500 G1 X18.202 Y13.354 F2500 X16.806 Y13.352 X15.300 Y18.656.

FormatExample
RGB or RGBA (red, green, blue, alpha)tuple of float values in a closedinterval [0, 1].
  • (0.1,0.2,0.5)
  • (0.1,0.2,0.5,0.3)
Case-insensitive hex RGB or RGBAstring.
  • '#0f0f0f'
  • '#0f0f0f80'
Case-insensitive RGB or RGBA stringequivalent hex shorthand ofduplicated characters.
  • '#abc' as '#aabbcc'
  • '#fb1' as '#ffbb11'
String representation of float valuein closed interval [0,1] forblack and white, respectively.
  • '0.8' as light gray
  • '0' as black
  • '1' as white

Single character shorthand notationfor shades of colors.

Note

The colors green, cyan,magenta, and yellow do notcoincide with X11/CSS4colors.

  • 'b' as blue
  • 'g' as green
  • 'r' as red
  • 'c' as cyan
  • 'm' as magenta
  • 'y' as yellow
  • 'k' as black
  • 'w' as white
Case-insensitive X11/CSS4 color namewith no spaces.
  • 'aquamarine'
  • 'mediumseagreen'
Case-insensitive color name fromxkcd color survey with 'xkcd:'prefix.
  • 'xkcd:skyblue'
  • 'xkcd:eggshell'

Case-insensitive Tableau Colors from'T10' categorical palette.

  • 'tab:blue'
  • 'tab:orange'
  • 'tab:green'
  • 'tab:red'
  • 'tab:purple'
  • 'tab:brown'
  • 'tab:pink'
  • 'tab:gray'
  • 'tab:olive'
  • 'tab:cyan'

'CN' color spec where 'C'precedes a number acting as an indexinto the default property cycle.

Note

Matplotlib indexes colorat draw time and defaultsto black if cycle does notinclude color.

  • 'C0'
  • 'C1'
rcParams['axes.prop_cycle'] (default: cycler('color',['#1f77b4','#ff7f0e','#2ca02c','#d62728','#9467bd','#8c564b','#e377c2','#7f7f7f','#bcbd22','#17becf']))

See also

The following links provide more information on colors in Matplotlib.
  • Color Demo Example
  • matplotlib.colors API
  • List of named colors Example

'Red', 'Green', and 'Blue' are the intensities of those colors. In combination,they represent the colorspace.

Matplotlib draws Artists based on the zorder parameter. If there are nospecified values, Matplotlib defaults to the order of the Artists added to theAxes.

The alpha for an Artist controls opacity. It indicates how the RGB color of thenew Artist combines with RGB colors already on the Axes.

The two Artists combine with alpha compositing. Matplotlib uses the equationbelow to compute the result of blending a new Artist.

G Code Plotting Python Examples

Alpha of 1 indicates the new Artist completely covers the previous color.Alpha of 0 for top color is not visible; however, it contributes to blendingfor intermediate values as the cumulative result of all previous Artists. Thefollowing table contains examples.

Alpha valueVisual
0.3
1

Note

Re-ordering Artists is not commutative in Matplotlib.

'CN' color selection¶

Matplotlib converts 'CN' colors to RGBA when drawing Artists. TheStyling with cycler section contains additionalinformation about controlling colors and style properties.

G code plotting python examples

Python Plot Graph

The first color 'C0' is the title. Each plot uses the second and thirdcolors of each style's rcParams['axes.prop_cycle'] (default: cycler('color',['#1f77b4','#ff7f0e','#2ca02c','#d62728','#9467bd','#8c564b','#e377c2','#7f7f7f','#bcbd22','#17becf'])). They are 'C1' and 'C2',respectively.

G Code Plotting Python Download

Comparison between X11/CSS4 and xkcd colors¶

The xkcd colors come from a user survey conducted by the webcomic xkcd.

95 out of the 148 X11/CSS4 color names also appear in the xkcd color survey.Almost all of them map to different color values in the X11/CSS4 and inthe xkcd palette. Only 'black', 'white' and 'cyan' are identical.

Python Line Plot

For example, 'blue' maps to '#0000FF' whereas 'xkcd:blue' maps to'#0343DF'. Due to these name collisions, all xkcd colors have the'xkcd:' prefix.

The visual below shows name collisions. Color names where color values agreeare in bold.

Total running time of the script: ( 0 minutes 1.149 seconds)

G Code Plotting Python Example

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