Teaching computer Science, primarily Modern C++, C, DLang, games, and computer graphics programming I'm a teaching professor and Senior 3D Graphics Engineer who has worked in industry at various games and graphics companies.
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Hi Mike, I like your Videos and was looking for something about perfect forwarding. Do you have such a video already? I‘ve understood this is used to avoid unnecessary copy constructor calls when Objects are being initialized and it also works for rvalues but I would like to understand the idea behind this a little better. Thanks and keep on going Bernhard
For a moment i thought i could run x86 linux on arm64 apple. Well that's not "virtually" possible. Why does ubuntu say that opengl version is 4.5? Apple only supports up to 4.1.
@@fsouza I'll have to give it a try to see how it's improved over the years. In 2021 it couldn't properly run Ubuntu -- but perhaps it's improved or I will figure out the configuration properly 🙂
However, there are still issues; I use UTM on my M1 for demoing Windows PowerShell for my students. Switching screens (for an USB-C attached beamer) induces flickering…
Virtual Machines are like the ‘spiderman pointing’ at eachother meme, just virtual processes pointing at other virtual processes 😂. Always nice to use to test pilot a distribution.
Hehe -- indeed! It can be nice to have something that just works, and I also understand the problem things like Docker solve. The problem however is when the expectation is that delivering an entire docker file (or operating system!) becomes a better solution than the binary or source of the application -- that's usually a sign the build system or dependencies have gotten out of hand :)
Hello, Mike, i m really appreciate that , i m using double visit; with double variant , variant_ptr_solid -> variante_ptr_behavior and it work very well.
Vim (or at least Vi) is part of the POSIX standard so it'll be available pretty much everywhere. In reality, emacs is probably everywhere too though. That's about it -- choose whichever you like, I've just found VIM was easier for me to learn and use and use (I had to use emacs in college, so that's the last time I was immersed in Emacs 10+ years ago).
@@hristovalev2923 cheers! It's probably somewhere in the C++ Programming language book or other texts otherwise. I learned about it from a cppcon talk several years ago 🙂
Thanks for this. I'm in a Data Structures & Algorithms course and the topic of friend functions was introduced, but it wasn't clear why we'd want to use them. In my mind, I thought it just seemed like a way to create a backdoor to your protected member data, which seems.... risky at best. I wondered if this is something I'd actually ever want to use (we certainly don't seem to have any applications for it in the class) so this video was really helpful!
Cheers! Yeah, in practice the only time I've really used it is for print functions (or overloading operator>> for output). There are also friend classes which follow the same idea.
I guess we need to use glEnable(GL_CULL_FACE) in PreDraw to see why the winding order matters. In this case, if the vertex order is clockwise, we wouldn't see the triangle; therefore, it has to be counter-clockwise to be visible. (I think Mike's video is flipped horizontally, or he is left-handed. I'm guessing that's why he is using his left hand to show the right-handed coordinate system (8:16).)
I used glEnable(GL_CULL_FACE) in PreDraw and changed my original triangle(not quad) to below, and pff... it disappeared. const std::vector<GLfloat> vertexPosition{ -0.8f, -0.8f, 0.0f, 0.0f, 0.8f, 0.0f, 0.8f, -0.8f, 0.0f }; //John Cena triangle const std::vector<GLfloat> vertexPosition{ -0.8f, -0.8f, 0.0f, 0.8f, -0.8f, 0.0f, 0.0f, 0.8f, 0.0f }; //original triangle
For anyone on Windows, in powershell you can use "Measure-Command {.\prog.exe}" instead of "time ./prog". Also, I noticed running the program over and over on average makes it run faster. Could be due to branch prediction (I am learning like everyone else, don't take my word), but I let Mike or someone actually knowing what they're talking about comment on that.
I noticed in my program address of x compared to y is offset by 4 (the other way around compared to yours). I am on a Windows machine if that matters (as if it fills up from bottoms up; a novice here, sorry if my lingo doesn't make a lot of sense). In any case, your point is still valid, it was just an interesting observation for me.
Hi, Mike! How's it going? I bumped into your series just by chance a couple of days ago and I can say that you're definitely the most knowledgeable person at low-level programming I have ever seen. Just wanted to say thank you for all the impeccable work you have been doing for people from all over the world, who are willing to teach themselves systems programming. Keep it up and take care. Greetings from Russia.
Hello Mike, for the record, I'm brazilian and I'm really enjoying your lessons! As for this one, a point raised me a doubt bc when you assigned a value outside the range previously set up to 'Ids' array, you received a 'segmentation fault' message, but in my case I didn't receive anything and it compiled well and even was able to execute. Do you know the reason of this behavior?
@@vb9950 Semaphores are one of the lowest level synchronization primitives. They can be used as barriers, used like mutexes, etc., so many use cases for them.
Hello everyone! Can you help me please, I am wondering what is the best approach to create your database in c++, is it through binary files? I would like to know the best way if am planning to extend my project in the future. Thanks for your support!
You are wrong about pitch! It is not the width * number of components (w * 3 in your example). Pitch is the width in bytes of the row, including any PADDING put in it for alignment. For example, a 1 pixel RGB image is not 3 bytes per row, it is probably DWORD aligned and has 1 byte of padding. So the pitch in that case is 4 bytes. Also, back in the day (decades ago, even with VESA in DOS), pitch was also used due to banking and alignment requirements on the video card. When accessing VRAM you had to use pitch to calculate the next row because in some cases it could be hundreds of bytes skipped that did not contain pixels at all, but the BANK's memory window required alignment for the starting address.
@@MikeShah It is embedded in my head since the early days of programming. I have bad memories of VESA, Watcom C with the 32 bit extender and bi-modal interrupts. hehe But it was not as bad as the early 80s with the 8bit computers. My favorite machine was, without a doubt, the Amiga! PS: We used the bimodal IRQ to handle bank switching the video card from assembler, our high level code treated the screen as a linear buffer even though it was broken up by lets say 4 banks. When the high level code wrote outside of a bank, it triggered our IRQ and we would bank in the card. That is exactly what Intel RSX and the Microsoft WinG extensions did. Heck, I think DirectX works that way too.
@@WyMustIGo Too cool! Always fun learning about software history and how we got to where we got. You might enjoy my interview with Wouter and his language Amiga-E then :) ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-hDT79xdqf3k.html
@@MikeShah Thanks, I will check it out. The Amiga was great, back then I worked for Impulse (we made 3D ray tracer named Turbo Silver, and then Imagine 3D, also made some hardware). Sold some shareware too back in the late 80s. After the Amiga died, I went to the PC and eventually worked at Adobe on Photoshop. I miss those days...
@@MikeShah 17:01 I meant why is it doing (copies) while reallocating memory but then i understood my confuse. We "move" ownership not the data, so when the vector allocates new memory to hold more space it needs to COPY the data from old memory. Sorry, it was stupid question. Thank you for your response and for your lessons!
fn TYPE name, is ugly, i'd have prefered fn name TYPE these people don't understand how important it is to make your language GREPPABLE cool language, but the syntax is a no for me
SDL Vulkan 2d api is ready now, and Vulk is the default renderer to use too now. You should make a tutorial about 2d vulkan, which I can't find anywhere else still
Boring, I struggled to watch the video, it was rambling and lacked useful explanations, if it depended on this video I wouldn't use FreeBASIC even if they pointed a gun at my head. Forgive my heavy and harsh words, unfortunately you are tiring, you don't make anyone understand anything, I come from VisualBASIC 6 and FreeBASIC was a great turning point for developing applications in a Linux environment, with your video you discourage anyone from even getting close. I was really disappointed especially for the work behind it.
@@grazianofalcone3093 sorry to hear that. This series is about looking at languages for the first time -- indeed it can be humbling for myself to see how much knowledge every language and its ecosystem require. 👍
@@MikeShah I appreciate your comment to justify yourself and I understand your reasons, being a programmer with knowledge in various languages such as C, C++, PHP, JAVA, JS, VisualBASIC (6, .net) and FreeBASIC, I found your video discouraging for those who would like to start from scratch. Speaking of FreeBASIC it should be said that it is one of the languages without a mandatory structure (like Java and C++ and C) that allows the possibility of developing entire applications and revising them without difficulty, being completely compatible with GNU C you can use libraries like GTK and develop graphical interface applications for desktops, it also has two development environments, one visual and the second text editor, being a compiler it does not depend on a specific editor and the software is compiled to work autonomously, despite being a simple language to learn unlike Python it does not need an environment, furthermore the compiler itself is written in FreeBASIC so a programmer can implement improvements and compile them using the same FreeBASIC, like C and C++, being integrated with GCC extensions the same applications have performances close to those written in C and C++ There is a lot to say about FreeBASIC, to say, furthermore the latest implementations allow the creation and use of objects like C++ and JAVA
Having the third highest link on the search results for your language be, "RIP Pony" is brutal. Apparently the post was about Wallarroo switching away from Pony to Rust.
