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I love this phenomenon. I woke one morning in my dark room, saw a bead of light coming through my curtain. I stared at the circle of light on the ceiling and realized it was changing colors, i was confused. I focused closer and saw it was project the images of people walking on the sidewalk outside, i could see the bottoms of their legs and their shoes, even the grass. I was obsessed with that for a while lol

Which is this place?

Please continue this series!!!!

c++ interpreter, huh? reminds me of temple os' "holy c" interpreter. i like it!

THANK YOU VERY MUCH. I tried this 3days but you solved this only 3 hours!!!!!!!!!!!!!!!!!!!!!!!☺☺☺☺☺☺☺☺☺

Hi There. I after running this code, my GL is very slow and responds with a significant delay. What is the real problem. Would the multithreading solve it? HP Envy x360 with Core: 12 Memory :512GB SSD RAM : 16GB DDR 4 3200MHz Processor: Intel core 7 Graphic Card: Intel Graphics

Thanks a lot, your video helped me.

Thank you sir for making this tutorial. When I run the make command, I get the error given below. Please help me in fixing this: make [ 16%] Building CXX object CMakeFiles/sim.dir/sim.cc.o In file included from /home/milansingh/sim/action.hh:6, from /home/milansingh/sim/sim.cc:11: /home/milansingh/sim/generator.hh:4:10: fatal error: G4VUserPrimanyGeneratorAction.hh: No such file or directory 4 | #include "G4VUserPrimanyGeneratorAction.hh" | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ compilation terminated. make[2]: *** [CMakeFiles/sim.dir/build.make:76: CMakeFiles/sim.dir/sim.cc.o] Error 1 make[1]: *** [CMakeFiles/Makefile2:84: CMakeFiles/sim.dir/all] Error 2 make: *** [Makefile:91: all] Error 2 My action.hh file is: GNU nano 6.2 ../action.hh #ifndef ACTION_HH #define ACTION_HH #include "G4VUserActionInitialization.hh" #include "generator.hh" class MyActionInitialization : public G4VUserActionInitialization { public: MyActionInitialization(); ~MyActionInitialization(); virtual void Build() const; }; #endif and my sim.cc file is: #include <iostream> #include "G4RunManager.hh" #include "G4UImanager.hh" #include "G4VisManager.hh" #include "G4VisExecutive.hh" #include "G4UIExecutive.hh" #include "construction.hh" #include "physics.hh" #include "action.hh" int main(int argc, char** argv) { G4RunManager *runManager = new G4RunManager(); runManager->SetUserInitialization(new MyDetectorConstruction()); runManager->SetUserInitialization(new MyPhysicsList()); runManager->SetUserInitialization(new MyActionInitialization()); runManager->Initialize(); G4UIExecutive *ui = new G4UIExecutive(argc, argv); G4VisManager *visManager = new G4VisExecutive(); visManager->Initialize(); G4UImanager *UImanager = G4UImanager::GetUIpointer(); UImanager->ApplyCommand("/vis/open OGL"); UImanager->ApplyCommand("/vis/viewer/set/viewpointVector 1 1 1"); UImanager->ApplyCommand("/vis/drawVolume"); ui->SessionStart(); return 0; } Thanks

how did the footnote command without using fancy package?

you are the best , i deeply appreciate your direct and clear information

Nice job, thanks. The video inset of you hides an important part of the demo. Any way to fix that?

isFinal() is the key

I did everything as mentioned but after the command make -j4 the process is stuck at 63% and there are a few errors as well. What can be done to solve this issue? c++: fatal error: Killed signal terminated program cc1plus compilation terminated.

Hi! I have added both Optical interactions just as you did, but still I cannot see any phtons, so to speak cherenkov light.

code with some changes \documentclass{standalone} \usepackage{circuitikz} \begin{document} \begin{tikzpicture} %draw a npn transister and name its connections \draw (2.5,0) node[npn](T1) {$T_1$}; \draw (T1.base) node[above] {B}; \draw (T1.collector) node[left] {C}; \draw (T1.emitter) node[left] {E}; %create C1 and draw a line through it from P1 to T1.B %$C_1$ ($places in equation mode and the underline in name denoting subscript for the 1) %ocirc is open circle and circ is closed connection point \draw(0,0) node[ocirc] {$P_1$} to [C, l=$C_1$] (T1.base); %draw resister R1 and connection point \draw (T1.collector) to[R, l=$R_1$] ++(0,2) --++(1.5,0) node[ocirc] (P2){$P_2$}; %draw closed connection on T1.c to open connection % -- represents a line (possibly style of line?) \draw(T1.collector) node[circ]{} -- ++(1.5,0) node[ocirc] (P3) {$P_3$}; %draw from T1.e to open connection \draw (T1.emitter) -- ++(0,-1) node[circ] (e){}; %draw from closed connection attached to T1.e to a closed connection in lower left \draw (e.center) -- ++(-2.5,0) node[ocirc] {}; %draw line with arrow from P1 to open node and offset it by 2mm to left to show it as an illistration not an actual connection \draw [-latex] ([xshift=-2mm]0,0) -- ++(0,-1.8) node[midway, left] {$U_1$}; %draw line with arrow from P2 to P3 (both open nodes). 3mm vertical spacing added to show it as an illustration not an actual connection \draw [-latex] ([yshift=-3mm]P2.center) -- ([yshift=3mm]P3.center) node[midway, right] {$U_2$}; \end{tikzpicture} \end{document}

When installing, the command shell showed this: [ 61%] Built target obj.clangFrontend make: *** [Makefile:156: all] Error 2 Anyone can help?

As an atheist I shall join

Sir, can that Photons->Draw(...) command be used for some other particles too?

WOW well explained

Amazing video! Is there a way to change the color for each graph in the HStack?

I am trying to follow the tutorial but I am getting this error: CMake Error: The source directory does not appear to contain CMakeLists.txt How can I solve it?

thanks a lot from somebody who's very new to this. The video was very easy helpful. I would like to know what i should do like if i was plotting it from another root file and has to draw a specific variable from the branch?

Forever grateful for your videos!!

Thank you for the tutorial! It saved my life!!! 🙏🏻

Thank you

I don’t know how to thank you enough for your work. If you have a Patreon accout, please let us know.

great tutorial!!!

Kindly make a vedio on how to install fluka software on Ubuntu.

Is it possible to use geant4 on windows system?

yeah man. I mean. I searched in so many reddit and blog posts. And your Video is like too easy and functional. Much love

CHADDDDDD

Is there any way to download this code on Windows?

how do you write letters with tildas on top in your Laptop?

22:11 is it a energy spectrum?

What program is this?? looks like tikzit

need to add a return value in function ProcessHits, or it will cause illegal hardware instruction core dumped error with gcc 14.1.1 in Arch Linux. Seems that ubuntu does not have the issue, maybe it's caused by gcc version?

For those who can't find output.root in the build folder:- follow the video till 17:30. In my case root file was created no before it was filled with entries.

That was super useful

Thanks a lot

Very good video, thank you very much! However, as seen in the gamma spectrum of 60Co, the photopeaks align very well, but the Compton background wasn't recorded properly (or at least not completely). Does anyone know how to achieve a better recording of Compton scattering?

Nice video. One remark: you forgot to close the file.

For those who have problems using G4PhysicsOrderedFreeVector, use G4PhysicsFreeVector instead, i think it changed for 11 version. Also there is no spline() function so i erased that line and it worked for me.

How to make "Contents" set in center?

My treshold for the activity 1 is 2GeV. Even at 1.9999GeV there is no Cherenkov light. For the second activity, applying the next macro /gun/position 10 10 10 cm displace the mean value by 10.

Really useful thank you

I am not being able to get the output root file. Is there a solution for that?

Thanks for the video it was very helpful! Have you uploaded any more videos about the ATLAS software? Because it seems like the playlist ends with this first video.

This instalation won't allow you to use your HDD on windows so it's kinda useless you have root on windows but you cant put data in it or even take data from your HDD.

Thank you for making this video! it helped me understand more about how geant4 works!