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diff --git a/content/blog/_index.md b/content/blog/_index.md deleted file mode 100644 index 818c73c..0000000 --- a/content/blog/_index.md +++ /dev/null @@ -1,6 +0,0 @@ -+++ -title = "blog" -sort_by = "date" -template = "blog.html" -page_template = "blog-page.html" -+++ diff --git a/content/blog/mons_i/base.png b/content/blog/mons_i/base.png Binary files differdeleted file mode 100644 index 60a4d0f..0000000 --- a/content/blog/mons_i/base.png +++ /dev/null diff --git a/content/blog/mons_i/first_triangle.png b/content/blog/mons_i/first_triangle.png Binary files differdeleted file mode 100644 index 16d0992..0000000 --- a/content/blog/mons_i/first_triangle.png +++ /dev/null diff --git a/content/blog/mons_i/index.md b/content/blog/mons_i/index.md deleted file mode 100644 index 9b22d2f..0000000 --- a/content/blog/mons_i/index.md +++ /dev/null @@ -1,249 +0,0 @@ -+++ -title = "mons (the mountain) - part i: i got sidetracked writing c for a week" -date = 2025-02-06 -[extra] -coverimage = "./mons.png" -+++ - -## the valley - -so i've been working for a while on a large game project and was really starting to get burnt out - -it's been my primary focus since graduating from school and progress started slowing to a crawl - -it was clear to me that i needed a break from the project to recharge a little bit - -so i decided to try and start a project i've been fantasizing about for a long time: - - - -mons is a monumental undertaking, an excercise in insanity, and my personal code sanctuary - -the goal of the project is pretty abstract, i'm just coding whatever i feel like, but doing it with - -## a couple rules - -### rule 1: c99 - -no rust :( - -i've been writing rust almost every day for the last 3 years, it's time to get scary - -c is like dead simple which is why i think it will be a pretty meditative experience - -by meditative i mean mind-numbingly tedious but i'm not in a rush here - -i think the absolute worst part of this is the lack of namespaces but i'll live - -### rule 2: extremely limited dependencies - -it's time to get real - -if i'm undertaking this journey in ~~masochism~~ voluntary discomfort (only true stoic sigmas get this one) i might as well be learning something while i do it - -this would be "no dependencies" but like i kind of want to make some fun stuff at some point - -so i have 3 big exceptions - -i can use stdlib and posix shit (at my discretion) - -i can use "important" libraries - -i don't really have a good description for what makes a library "important" but think hardware stuff like opengl/vulkan or xlib - -the last thing is that i can use freely available implementations of algorithms i have no chance in hell of understanding, like [mikktspace](http://www.mikktspace.com/) - -i just don't see much value in doing that myself - -## the foot - -### mons_math - -starting out from nothing i decided my first goal would be to spin up a basic 3d graphical application - -i decided to start with opengl, i have experience with both it and vulkan and opengl is significantly less work to get started with - -before i could even render a basic triangle though, i needed (wanted) a way to represent and manipulate basic linear algebra types such as vectors, matrices, and quaternions - -so on the first day i just sat on my couch and typed up a library for exactly that - -``` -mons_math/src/ -├── mat2.c -├── mat3.c -├── mat4.c -├── quat.c -├── util.c -├── vec2.c -├── vec3.c -└── vec4.c -``` -(i won't get into implementation details too much in this post in the interest of brevity, but all the code is available on my [git server](https://git.soaos.dev/mons/)) - -i found writing the matrix and vector operations super satisfying in spite of the repetition for different dimensionalities - -i do wish i had kept in mind that opengl is column-major for matrices, since i wrote mine as row-major like a normal person, but it might honestly be for the best, as it makes using them much more intuitive based on the stuff i learned in math class - -once i had this library i was quickly able to spin up a basic 3d app using opengl, along with xlib and glx for windowing and input under x11 - - - -i had always used [glfw](https://www.glfw.org/) for windowing so it was interesting to see how similar it was using xlib (although there were some tricky differences, like windows being created without a depth buffer by default) - -### auto-embedding shader files - -i set up my project to automatically embed shaders in my code which was pretty cool - -basically there isn't a c mechanism similar to rust's lovely [`include_bytes`](https://doc.rust-lang.org/std/macro.include_bytes.html) macro, so the best you can really do is generate a constant byte array and store it in a header file - -luckily i learned how to use the [xxd](https://linux.die.net/man/1/xxd) tool to automatically generate such a header file, and then added a script to automatically embed all files located in my project's `embed` folder and place generated headers in the corresponding `include/embedded` location - -``` -embed/ -└── shaders - ├── basic.frag.glsl - └── basic.vert.glsl -include/ -├── ... -├── embedded -│ └── shaders -│ ├── basic.frag.glsl.h -│ └── basic.vert.glsl.h -└── ... -``` - -then i added it as a fake target in my cmake project and made the main project target depend on it - -### mons_qoi - -not satisfied with a simple solid color, i decided i needed to load images - -obviously i wasn't allowed to use an existing loader like [stbi](https://github.com/nothings/stb/blob/master/stb_image.h) - -i did take a quick look at the png and jpeg specifications since these are by far and away the most popular texture image formats out there - -my lazy ass was not about to write a loader for either of those formats (for now) - -for now i decided to look for something easy to implement but like actually respectable (so not [ppm](https://netpbm.sourceforge.net/doc/ppm.html)), and boy oh boy - -enter [qoi](https://qoiformat.org/) - -this shit descended from the heavens i swear to god - -qoi, or the quite ok image format, is extremely simple and extremely fast to encode and decode, and offers pretty decent lossless compression - -my decoder is around 200 lines of c i think, which is a bit more than the [reference implementation](https://github.com/phoboslab/qoi) i believe but i tried my best to not refer to it for fun - -once i had that i was able to just pop the loaded image data into opengl textures - - - -### mons_json - -up to this point i was using hardcoded vertex buffers and i wanted to be able to load more complex geometry - -i considered using [obj](https://www.loc.gov/preservation/digital/formats/fdd/fdd000507.shtml) for my models but i'm a big fan of [gltf](https://www.khronos.org/Gltf) so i decided to just jump the gun and go for a gltf loader right off the bat - -gltf is stored as [json](https://www.json.org/json-en.html) data so i knew if i wanted to have a shot i would need a flexible, dynamic json solution - -```c -struct mons_json_value; -union mons_json_entry; - -typedef struct mons_json_array { - struct mons_json_value *values; - unsigned int len; -} mons_json_array; - -typedef union mons_json_value_data { - char *string; - float number; - mons_hashmap object; - mons_json_array array; - bool boolean; - void *null; -} mons_json_value_data; - -typedef enum mons_json_value_type { - MONS_JSON_STRING, - MONS_JSON_NUMBER, - MONS_JSON_OBJECT, - MONS_JSON_ARRAY, - MONS_JSON_BOOL, - MONS_JSON_NULL, -} mons_json_value_type; - -typedef struct mons_json_value { - mons_json_value_type type; - mons_json_value_data data; -} mons_json_value; -``` - -i discovered a cool pattern here where a combination of an enum and a union (never actually used one before this project) allowed me to store a variety of types in a `mons_json_value` while being aware of which type it actually was - -### mons_hashmap - -the performance of my json structures depended on my ability to store key-value pairs in an efficient-to-access way - -obvious choice was a hashmap data structure - -i just implemented this from memory from my data structures class back in school - -```c -typedef struct mons_hashmap_pair { - char *key; - void *value; - struct mons_hashmap_pair *next; -} mons_hashmap_pair; - -typedef struct mons_hashmap { - mons_hashmap_pair **data; - unsigned int bucket_count; - unsigned int member_size; - unsigned int len; -} mons_hashmap; -``` - -this hashmap is basically just an array of linked lists that pairs get shoved into based on the hash of the key - -for the hash function i just went with the [djb2 hash function](http://www.cse.yorku.ca/~oz/hash.html) since it worked well for me in the past - -### mons_gltf - -at long last, i was able to dig into the gltf format - -[the specification](https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html) is quite deep and i focused on implementing basic mesh features first, opting to do things like animations, morph targets, scenes, node hierarchies, etc. later - -i actually found the process of implementing the loader pretty chill, i especially enjoyed learning how the data was stored in the binary buffers and how to use accessors to read it - -after about a day of work i managed to get mesh primitives out of the gltf files and into my in-memory model structure - - - -(i was using [this model](https://polyhaven.com/a/marble_bust_01) for testing) - -the textures that came with the model were in jpeg format, which i obviously could not yet load, and the gltf spec doesn't support formats other than jpeg and png - -so i said "To hell with the spec!" and switched the image mimetypes to the (illegal) `image/qoi` and converted the textures using [imagemagick](https://imagemagick.org/index.php) anyway - -then my textures loaded beautifully - - - -at this point i was getting pretty tired lol - -i was ready to take a break from my break - -but i wanted to leave off in a really satisfying place so i decided to implement normal mapping as one last thing - -as i previously mentioned i would use the [mikktspace](http://www.mikktspace.com) algorithm to do my tangent calculations - - - -and with that i decided i was ready to go back and get some work done on something actually important to me - -this whole process took me about a week and was a pretty chill experience - -thanks for reading this far, i hope it's not too brutal - -\- silas diff --git a/content/blog/mons_i/mesh.png b/content/blog/mons_i/mesh.png Binary files differdeleted file mode 100644 index aedf3a1..0000000 --- a/content/blog/mons_i/mesh.png +++ /dev/null diff --git a/content/blog/mons_i/mons.png b/content/blog/mons_i/mons.png Binary files differdeleted file mode 100644 index 6aeb835..0000000 --- a/content/blog/mons_i/mons.png +++ /dev/null diff --git a/content/blog/mons_i/normalmap.png b/content/blog/mons_i/normalmap.png Binary files differdeleted file mode 100644 index c295595..0000000 --- a/content/blog/mons_i/normalmap.png +++ /dev/null diff --git a/content/blog/mons_i/texture.png b/content/blog/mons_i/texture.png Binary files differdeleted file mode 100644 index 94e071c..0000000 --- a/content/blog/mons_i/texture.png +++ /dev/null diff --git a/content/blog/new-website.md b/content/blog/new-website.md deleted file mode 100644 index 4c92481..0000000 --- a/content/blog/new-website.md +++ /dev/null @@ -1,67 +0,0 @@ -+++ -title = "time for a new website" -date = 2024-08-13 -+++ -dear witness, - -this is the first post on my new website, which i'm creating using the [zola](https://www.getzola.org) static site generator - -the old site used [jekyll](jekyllrb.com), which i like a lot, and i've used it for over 5 years - -<br/> - -i always found the ruby development environment to be a massive pain in the ass to set up, which is why zola was pretty appealing - -i also never use ruby for damn near anything, so i never keep it installed - -i've also just been meaning to change things up a little in general - -the whole early web 2.0 aesthetic is a lot of fun, but i've been feeling a bit more drawn towards minimalism lately - -besides, i was barely even sentient when that aesthetic was big - -<br/> - -i might port over the old posts - -might not - -some of that stuff was pretty cool - -you can always check out the internet archive to see that stuff if you want: [http://web.archive.org/web/20240226014714/https://exvacuum.dev/notes](http://web.archive.org/web/20240226014714/https://exvacuum.dev/notes) - -<br/> - -idk why i decided to write like this but it's kind of funny - -a bit rambly - -it's actually really annoying trying to intentionally write poorly - -<br/> - -i do want to start writing more of these things because god i feel like i learn so much and don't have anywhere to share it - -like i have my [youtube channel](https://youtube.com/@silasbartha), which is great when i can muster up the willpower to throw something together, but i don't feel like my skills are developed enough to output videos at a rate or quality which would satisfy me - -i would be spending more time on videos about my projects than the projects themselves - -<br/> - -i'm actually putting off my big personal project right now to do this lol - -but it's important (i think) - -my site's on my resume and i'm looking for jobs right now - -if you're a potential employer reading this, first of all: i'm surprised you read this far! - -but also please hire me or something - -not for frontend web development obviously - -<br/> - -thanks for reading this, - -\- silas |
