The home build tool with Planner5d.

This online tool lets you build into 3D space.
The development team comes with this intro:
Create your dream home An advanced and easy-to-use 2D/3D home design tool. Join a community of 47 217 259 amateur designers.
The online tool can be found at this website.
This is a screenshot with this tool from the website:

Shadertoy: The sin math function - 001.

Another example with shadertoy online tool.
The example come with all comments to understand how the sine function is show on shadertoy website.

MakeHuman: Nightly builds of (most) plugins.

At 11/18/2019 the MakeHuman team development comes with many plugins for MakeHuman software: These are plugins related to MakeHuman. The MakeHuman side plugins are installed by placing the directory (for example "9_export_mhx2") in the "plugins" directory where you unzipped or installed MakeHuman. On linux this is usually /usr/share/makehuman/plugins. The Blender side plugins are installed in Blender, in the addons part of the user preferences.
See the official website.

Lutris the Open Source gaming platform for any Linux distro.

Lutris is an Open Source gaming platform for Linux. It installs and launches games so you can start playing without the hassle of setting up your games. Get your games from GOG, Steam, Battle.net, Origin, Uplay and many other sources running on any Linux powered gaming machine.
You need to create an account and you can run many games on Linux and multiple platforms, see the official website with games.
If you want to install it with your Linux distro the take a look at the official webpage.
I used the installation process on Fedora 31 with DNF tool:

[root@desk mythcat]# sudo dnf install lutris
Last metadata expiration check: 0:06:35 ago on Wed 04 Dec 2019 07:15:23 PM EET.
Dependencies resolved.
======================================================================================
 Package                    Arch       Version                      Repository   Size
======================================================================================
Installing:
 lutris                     x86_64     0.5.3-1.fc31                 fedora      2.0 M
...
Total download size: 129 M
Installed size: 708 M
Is this ok [y/N]: y
...
  llvm-libs-9.0.0-1.fc31.i686           ncurses-libs-6.1-12.20190803.fc31.i686       
  python3-evdev-1.1.2-4.fc31.x86_64     unixODBC-2.3.7-5.fc31.x86_64                 
  vulkan-loader-1.1.114.0-1.fc31.i686  

Complete!

Inkscape : Top 5 Finalists.

The About Screen Contest for Inkscape is a conquest for Inkscape contributions to the artistic presentation.
The Final Voting: Mon., December 2, 2019 – Sun., December 15, 2019 and the winners will be announced: Tues., December 17, 2019
The community chooses the top 5 Finalists in version 1.0 About Screen Contest.
Congratulations to our Top 5 Finalists!

1. 'Island of Creativity' by Bayu Rizaldhan Rayes
2. 'Graphic Design' by Bożena Augustyn
3. 'Migrate to Freedom' by Bayu Aji
4. 'How to Fold a Memory' by Dismecha
5. 'Inkscape 1.0 About Screen' by Rania Amina

See the final result on the official webpage.

The wrld for custom maps.

A good map can have many features.
If you don't want to build one using advanced programming language then you can use this website.
You can use this with an online map with Unity, JavaScript, iOS and Android.
You can also build your indoor map and visualize any building in 3D.
All of these features let you optimize building management, resources, and planning.
The map can have many features like time of day, weather and seasons and heat map.
The next example is an outdoor map of my location.

Shadertoy: The flag of Romania - 002.

This is another step about learning shaders.
The old example can be updated with this source code.
I commented on the source code to see step by step how this working.
One way to understand how this working to the final result is to going back on the shader structures that generate output to the basic elements of the shader.
If we apply this case to solve the problem then from the display a color like a vec4 color for fragColor adding a sin function to wave the result, and so on.
Right, this code can be optimized in many ways depending on the result.

// learning process area step by step 
// the gl_FragColor is a vec4 type of float values in the range 0 to 1.
// because the values are from 0 to 1  this can used in many ways with for domain and range
void mainImage( out vec4 fragColor, in vec2 fragCoord )
{
    // Normalized pixel coordinates (from 0 to 1)
    vec2 uv = fragCoord/iResolution.xy;
    // define a vec2 and uv can be divide to create waves 
    // use this to see the difference 
    // vec2 valul = vec2(0.01,1.0);
    vec2 valul = vec2(0.5,1.0);
    // define a vec2 this vector will be the vector of shadow
    vec2 unghi_valul = vec2(0.5,1.0);
    // this float will speed the animation with iTime
    float viteza = 3.0;
    // with the dot we can calculate the dot product of two vectors and result can be a shadow
    // the result of unghi can be changed when change the vectors and vectors math rules
    float unghi = dot(uv/valul, unghi_valul) - iTime * viteza;
    // the output can be used with sin to create a shadow wave
    // fill the screen with red
    fragColor = vec4(1,0,0,0) * sin(unghi);
    // fill the 2/3 of size with yellow color
    if(uv.x<(1.0/1.5))
    fragColor = vec4(1,1,0,0)  * sin(unghi);
    // fill the last 1/3 with the blue color 
    if(uv.x<1.0/3.0)
    fragColor = vec4(0,0,1,0)  * sin(unghi);
}

The result of this source code:

Shadertoy: The flag of Romania - 001.

Today I make the flag of Romania.
About this flag you can read at Wikipedia.
The goal of this simple tutorial is to learn the link between iResolution and the fill areas.
First, you need to normalized pixel coordinates from 0 to 1.
The gl_FragColor is a vec4 type of float values in the range 0 to 1.
We can use this property by fill the areas of the screen.
The example can be changed to use the RGBA.
The source code is this:

void mainImage( out vec4 fragColor, in vec2 fragCoord )
{
    // Normalized pixel coordinates (from 0 to 1)
    vec2 uv = fragCoord/iResolution.xy;
    // Output to screen
    // fill the screen with red
    fragColor = vec4(1,0,0,0);
    // fill the 2/3 of size with yellow color
    if(uv.x<(1.0/1.5))
    fragColor = vec4(1,1,0,0);
    // fill the last 1/3 with the blue color 
    if(uv.x<1 .0="" code="" fragcolor="vec4(0,0,1,0);">

This is the result of this shader:

The neon effect with javascript P5 JavaScript library.

The P5.js is a JavaScript library for creative coding.
You can use by adding this link on your HTML area using the script tag:

https://cdnjs.cloudflare.com/ajax/libs/p5.js/0.9.0/p5.min.js

You can use it like any JavaScript library.
You have two functions: setup and a draw for setup and drawing.

function setup() {
  createCanvas(window.innerWidth, window.innerHeight);
}

function draw() {
  ellipse(50, 50, 80, 80);
}

Then you can fill these functions with any javascript code.
You can see a neon effect with two bezier functions.
The example uses the mouse movement to change the bezier lines.
You can see many examples created by me at codepen website.

Steam on Linux distro Fedora 31 .

You can easily install the Steam tool on Fedora 31.

[root@desk my_bash_scripts]# dnf install steam -y
Last metadata expiration check: 0:20:14 ago on Sun 10 Nov 2019 07:29:46 PM EET.
Dependencies resolved.
...
  pcre-8.43-2.fc31.1.i686                                                       
  pixman-0.38.4-1.fc31.i686                                                     
  pulseaudio-libs-13.0-1.fc31.i686                                              
  rest-0.8.1-6.fc31.i686                                                        
  systemd-libs-243-4.gitef67743.fc31.i686                                       
  xz-libs-5.2.4-6.fc31.i686                                                     

Complete!

Then you can run it with this command:

[mythcat@desk ~]$ steam 
Running Steam on fedora 31 64-bit
STEAM_RUNTIME is enabled automatically
Pins potentially out-of-date, rebuilding...
...
  Initializing engine controller
  Post-initializing framework
-------------------------------------------------------------------------------
  Connected to server (registration)
  Disconnecting from server
  Disconnected from server
  Connected to server (game)
  Preparing engine controller for exit
  Disconnecting from server
-------------------------------------------------------------------------------
Game removed: AppID 488440 "", ProcID 152924 
Uploaded AppInterfaceStats to Steam
Exiting app 488440
No cached sticky mapping in ActivateActionSet.

I tested with the game Angeldust, but you can run any game.
From these funny games like Hibiscus Red, Gatlin' Demo to the last Counter-Strike.
These two screenshots show you how work's this tool game:

Shadertoy: Simple sky with shadertoy tool.

Today I create a simple sky with the online tool shadertoy.
I used Fedora 30 distro Linux and my old video card:

VGA compatible controller: NVIDIA Corporation GT218 [GeForce 210] (rev a2)

This is the output:

Easy install of GIMP with Flatpak.

GIMP is a free and open-source raster graphics editor used for image retouching and editing, free-form drawing, converting between different image formats, and more specialized tasks. GIMP is released under GPLv3+ licenses and is available for Linux, macOS, and Microsoft Windows, see Wikipedia.
Flatpak is a software utility for software deployment and package management for Linux. It is advertised as offering a sandbox environment in which users can run application software in isolation from the rest of the system. see Wikipedia.
Flatpak builds available in i386, x86-64, ARM and AArch64.

[root@desk mythcat]# dnf install flatpak.x86_64 
Last metadata expiration check: 0:27:27 ago on Fri 01 Nov 2019 11:27:47 PM EET.
Dependencies resolved.
...
Installed:
  flatpak-1.4.3-1.fc30.x86_64                                                   
  p11-kit-server-0.23.16.1-1.fc30.x86_64                                        
  xdg-desktop-portal-1.4.2-1.fc30.x86_64                                        
  xdg-desktop-portal-gtk-1.4.0-1.fc30.x86_64                                    
  flatpak-selinux-1.4.3-1.fc30.x86_64                                           
  flatpak-session-helper-1.4.3-1.fc30.x86_64                                    
  ostree-libs-2019.4-3.fc30.x86_64                                              

Complete!

The install and run of last GIMP software is easy, see commands:

[mythcat@desk ~]$ flatpak install https://flathub.org/repo/appstream/org.gimp.GIMP.flatpakref

Note that the directories 

'/var/lib/flatpak/exports/share'
'/home/mythcat/.local/share/flatpak/exports/share'

are not in the search path set by the XDG_DATA_DIRS environment variable, so applications installed by 
Flatpak may not appear on your desktop until the session is restarted.

Required runtime for org.gimp.GIMP/x86_64/stable (runtime/org.gnome.Platform/x86_64/3.32) found in remote
 flathub
Do you want to install it? [Y/n]: Y       

org.gimp.GIMP permissions:
    ipc                   network        x11       file access [1]
    dbus access [2]       tags [3]

    [1] /tmp, host, xdg-config/GIMP, xdg-config/gtk-3.0
    [2] org.freedesktop.FileManager1, org.gtk.vfs, org.gtk.vfs.*
    [3] stable
        ID                                    Arch   Branch Remote  Download
        ID                                    Arch   Branch Remote  Download
 1. [✓] org.gnome.Platform                    x86_64 3.32   flathub 360.0 MB / 374.0 MB
 2. [✓] org.gnome.Platform.Locale             x86_64 3.32   flathub  17.4 kB / 320.0 MB
 3. [✓] org.freedesktop.Platform.VAAPI.Intel  x86_64 18.08  flathub   1.8 MB / 1.8 MB
 4. [✓] org.freedesktop.Platform.html5-codecs x86_64 18.08  flathub   3.2 MB / 3.3 MB
 5. [✓] org.gimp.GIMP                         x86_64 stable flathub 106.5 MB / 108.9 MB

Installation complete.
[mythcat@desk ~]$ flatpak update

Note that the directories 

'/var/lib/flatpak/exports/share'
'/home/mythcat/.local/share/flatpak/exports/share'

are not in the search path set by the XDG_DATA_DIRS environment variable, so
applications installed by Flatpak may not appear on your desktop until the session is restarted.

Looking for updates…
Nothing to do.
[mythcat@desk ~]$ flatpak run org.gimp.GIMP//stable

Note that the directories 

'/var/lib/flatpak/exports/share'
'/home/mythcat/.local/share/flatpak/exports/share'

are not in the search path set by the XDG_DATA_DIRS environment variable, so
applications installed by Flatpak may not appear on your desktop until the session is restarted.

GIMP-Error: Skipping '/home/mythcat/.var/app/org.gimp.GIMP/config/GIMP/2.10/pluginrc
wrong GIMP protocol version.
...

NVIDIA video cards and CUDA feature.

Today I search on web information about video cards for processing, neural networks, and rendering.
If you use it with Blender 3D software or Neural networks then you need a GPU with CUDA feature.
My destop works with an old NVIDIA Corporation GT218 [GeForce 210] (rev a2) video card and this not help me very much.
The CUDA platform is a software layer that gives direct access to the GPU's virtual instruction set and parallel computational elements, for the execution of compute kernels. see Wikipedia.
This software uses the CUDA feature. Let's see all of these informations about desktop Nvidia GPUS ordered by CUDA core count.

GPU	CUDA cores	Memory	Processor frequency
GeForce GTX TITAN Z	5760	12 GB	705 / 876
NVIDIA TITAN Xp	3840	12 GB	1582
GeForce GTX 1080 Ti	3584	11 GB	1582
GeForce GTX TITAN X	3072	12 GB	1000 / 1075
GeForce GTX 690	3072	4 GB	915 / 1019
GeForce GTX TITAN Black	2880	6 GB	889 / 980
GeForce GTX 780 Ti	2880	3 GB	875 / 928
GeForce GTX 980 Ti	2816	6 GB	1000 / 1075
GeForce GTX TITAN	2688	6 GB	837 / 876
GeForce GTX 1080	2560	8 GB	1607 / 1733
GeForce GTX 780	2304	3 GB	863 / 900
GeForce GTX 980	2048	4 GB	1126 / 1216
GeForce GTX 1070	1920	8 GB	1506 / 1683
GeForce GTX 970	1664	4 GB	1050 / 1178
GeForce GTX 770	1536	2 GB	1046 / 1085
GeForce GTX 680	1536	2 GB	1006 / 1058
GeForce GTX 760 Ti (OEM)	1344	2 GB	960
GeForce GTX 670	1344	2 GB	915 / 980
GeForce GTX 660 Ti	1344	2 GB	915 / 980
GeForce GTX 1060 (6GB)	1280	6 GB	1506 / 1708
GeForce GTX 960 (OEM)	1280	3 GB	924 / 980
GeForce GTX 760 192-bit(OEM)	1152	1.5 GB / 3 GB	980 / 1033
GeForce GTX 760	1152	2 GB	980 / 1033
GeForce GTX 1060 (3GB)	1152	3 GB	1506 / 1708
GeForce GTX 660 (OEM)	1152	1.5 GB / 3 GB	823 / 888
GeForce GTX 960	1024	2 GB	1127 / 1178
GeForce GTX 950 (OEM)	1024	2 GB	935 / 980
GeForce GTX 590	1024	3 GB	630
GeForce GTX 660	960	2 GB	980 / 1033
GeForce GTX 1050 Ti	768	4 GB	1290 / 1392
GeForce GTX 950	768	2 GB	1024 / 1188
GeForce GTX 650 Ti BOOST	768	2 GB	980 / 1033
GeForce GTX 650 Ti	768	Wikipedia1 GB	928
GeForce GTX 1050	640	2 GB	1354 / 1455
GeForce GTX 750 Ti	640	2 GB	1020 / 1075
GeForce GTX 645 (OEM)	576	1 GB	823
GeForce GTX 750	512	1 GB	1020 / 1085
GeForce GTX 580	512	1536 MB
GeForce GTX 480	480	1536 MB
GeForce GTX 570	480	1280 MB
GeForce GTX 295	480	1792 MB
GeForce GTX 470	448	1280 MB
GeForce GTX 745 (OEM)	384	4 GB
GeForce GT 740	384	1 GB / 2 GB
GeForce GT 730	96-384	1 GB / 2 GB	700 / 902
GeForce GT 635 (OEM)	384	2 GB
GeForce GTX 650	384	1 GB
GeForce GTX 560 Ti	384	1 GB
GeForce GTX 560 (OEM)	384	1280 MB / 2560 MB
GeForce GT 640	384	2 GB
GeForce GTX 465	352	1 GB
GeForce GTX 560 Ti (OEM)	352	1280 GB / 2560 GB
GeForce GTX 460	336	1 GB
GeForce GTX 560	336	1 GB
GeForce GTX 460 SE	288	1 GB
GeForce GTX 555 (OEM)	288	1 GB
GeForce GTX 285 for Mac	240	Wikipedia1 GB
GeForce GTX 285	240	1 GB
GeForce GTX 280	240	1 GB
GeForce GT 720	192	1 GB / 2 GB
GeForce GT 710	192	2 GB	954
GeForce GTS 450	192	1 GB
GeForce GTX 550 Ti	192	1 GB
GeForce GT 630 (OEM)	192	1 GB / 2 GB
GeForce GT 640 (OEM)	144 / 384	1 GB / 2 GB
GeForce GT 545 GDDR5 (OEM)	144	1 GB
GeForce GT 545 DDR3	144	1.5 GB / 3 GB
GeForce GTS 250	128	1 GB
GeForce GTS 150	128	1 GB
GeForce GTS 240 (OEM Product)	112	1 GB
GeForce GT 630	96	1 GB	700~902
GeForce GT 620	96	1 GB	700
GeForce GT 440	96	1 GB	810
GeForce GT 430	96	1 GB	700
GeForce GT 530 (OEM)	96	1 GB / 2GB
GeForce GT 340 (OEM)	96	1 GB
GeForce GT 330 (OEM)	96-112	1 GB / 2GB
GeForce GT 240	96	1GB
GeForce GT 320 (OEM Product)	72	1 GB
GeForce GT 705 (OEM)	48	1 GB
GeForce GT 620 (OEM)	48	1 GB
GeForce GT 610	48	1 GB
GeForce GT 520 (OEM)	48	1 GB / 2 GB
GeForce GT 520	48	1 GB
GeForce GT 220	48	1 GB
GeForce 605 (OEM)	48	1 GB
GeForce 510 (OEM)	48	1 GB / 2 GB
GeForce 405 (OEM)	16	1 GB
GeForce 310 (OEM)	16	1 GB