robwaat

function showColor(rgb)
    %SHOWCOLOR Display a colorswatch of the given rgb value
    arguments
        rgb (1,3) {mustBeNonnegative, mustBeLessThanOrEqual(rgb, 255)} % 1x3 vector of RGB values.
    end

    % Validate & handle colors in 8-bit format 
    max_val = max(rgb);
    float_tol = 1e-12;
    if max_val > 1

robwaat

classdef None
    %None Empty placeholder class
    
    methods
        function obj = None()
            %NONE Construct an instance of this class
        end
    end
end

robwaat

Px4 Inject Params

A Python utility used to update a target Px4 parameter configuration file with existing preferred values given in a source file.

This can be very helpful to retain calibration and setup when re-flashing flight controller firmware.

Usage

Below are some basic instructions on how to use this script.

robwaat

QGroundControl Shortcut

A quick list of steps required to allow the use of QGround Control through the standard Ubuntu launcher. This prevents having to manually locate the AppImage file each time the program is opened.

Steps

We can achieve the above by creating a Ubuntu desktop file, used to point the system at the required resources. It's a lot like a shortcut in Windows, but specific to the Ubuntu launcher.

1. Download the latest (stable) version of QGroudControl for Linux from the distribution site. Make sure to follow the listed pre-requisite installation steps if this is a clean install.
2. The luancher's link to the AppImage file will be static, so we need to make a permanent place to put it. It's less likely to be accidentally disturbed if this isn't your downloads folder, so we'll make a dedicated directory.

robwaat

' Ask user to select Coordinate Frame of Interest
Dim oUCS As UserCoordinateSystem = ThisApplication.CommandManager.Pick(SelectionFilterEnum.kUserCoordinateSystemFilter, "Select UCS")

' Handle No selection case
If oUCS Is Nothing Then Exit Sub 

' Extract document name
Dim oDocName As String = ThisDoc.FileName

' Extract UCS name

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Ubuntu Customisation

A list of aesthetic tweaks to get a fresh ubuntu install how I like it.

0. Set a desktop wallpaper. I like this one

1. Install gnome desktop

   sudo apt install gnome-session gdm3

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Update Matlab on Ubuntu

Updating Matlab on Ubuntu can be problematic owing to the permissions associated with the default install directory (e.g. /usr/local/MATLAB/R2020b) and the license manager.

However, per this Matlab Answers post, the process can be completed manually with the following command:

sudo ./usr/local/MATLAB/R2020b/bin/glnxa64/update_installer

Modification of the above may be necessary depending on the user's install directory. The install directory can be found within an active Matlab session by the command:

robwaat

M862.3 P "[printer_model]" ; printer model check
M862.1 P[nozzle_diameter] ; nozzle diameter check
M115 U3.9.0 ; tell printer latest fw version
G90 ; use absolute coordinates
M83 ; extruder relative mode
M104 S150 ; set extruder temp partway
M140 S[first_layer_bed_temperature]  ; set bed temp
M190 S[first_layer_bed_temperature]  ; wait for bed temp
M109 S150 ; wait for extruder temp partway
G28 W ; home all without mesh bed level

robwaat

'''
Matplotlib Colormap Extractor

Print the RGB values of matplotlib colormaps to the terminal
'''

# Import matplotlib colormap
from matplotlib import cm

# Retrieve desired map

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VS Code ROS Debugging

These template files may be used to configure Visual Studio Code in support of debugging C++ based ROS nodes.

Note that the and placeholders must be manually configured to target the user's project.