Low-Level Graphics Coding in C on Linux
References:
Source Code: https://github.com/tsoding/olive.c
Demos: https://tsoding.github.io/olive.c/
UV mapping: https://en.wikipedia.org/wiki/UV_mapping
Timestamps:
00:00:00 - Intro
00:01:03 - Recap
00:01:40 - Plan for today
00:02:32 - SMS
00:02:48 - How exactly texture transformation works
00:03:05 - Difference between olivec_sprite_blend and olivec_sprite_copy
00:03:59 - Plans on a flexible mechanism of defining the format of the pixels
00:04:24 - How SDL defines pixel formats
00:05:30 - Destroying my entire working place just to find the graphics table
00:06:25 - Visual explanation of Rectangular Texture Transformation
00:11:23 - Non-Visual explanation of Rectangular Texture Transformation
00:12:38 - Text Editors Superiority
00:13:12 - I never read a single book about C Kappa
00:13:35 - What is ACM
00:14:39 - Why does he stream in white T-shirts
00:15:41 - I suck at Competetive Programming
00:15:54 - Back to the topic of the stream
00:16:11 - Triangular Interpolation Recap
00:17:34 - Realizing that I'm doing stupid thing again and switching to a Text Editor
00:18:45 - Introducing Texture Coordinates
00:19:50 - We can actually map Sprites on Triangles that way!
00:20:57 - Mapping Textures to Triangles is the Topic of Today's Stream (half of an hour intro lol)
00:21:17 - Putting back my drawing table
00:21:39 - Creating a new demo
00:23:43 - Converting PNG to C
00:24:37 - Back to demo
00:25:16 - New variation of olivec_triangle function for UV coordinates
00:27:09 - Limitations of the Canvas
00:28:40 - How can we store 2 floats in a single unsigned integer?
00:29:10 - Trick for packing normalized floats (0..1) in unsigned integers
00:30:52 - Using the same trick for UV coordinates
00:32:52 - C sucks
00:33:07 - C++ sucks too
00:34:20 - Yes, Rust also sucks (don't @ me)
00:34:37 - Replenishing stamina after epic rant
00:35:01 - Even more flexible pixel formats
00:37:54 - Introducing olivec_triangle3uv()
00:38:31 - Introducing Uv structure
00:39:30 - Why is it dangerous for me to speak English too loud
00:40:02 - Checking the size of Uv
00:41:34 - Subs
00:41:52 - Introducing olivec_uv()
00:43:40 - Implementing olivec_triangle3uv()
00:48:51 - Realizing that the canvas of UV coordinates was a dumb idea lol
00:50:41 - "But we may need that in the future" Kappa
00:52:56 - "All of my streams are exploration"
00:54:02 - First attempt
00:54:55 - Investigation begins!
00:55:45 - Subs
00:56:23 - This was not an overflow...
00:56:55 - Make an excuse to ask ChatGPT offscreen
00:57:15 - Developing a new hypothesis on the cause of the bug
00:58:38 - We missed a division
01:00:05 - Second attempt
01:00:53 - Trying random things
01:02:08 - Giving up on integers and trying floats lol
01:04:36 - ACTUALLY WORKED! POGGERS
01:05:08 - Arbitrary rotation of square sprites
01:06:01 - Can SDL rotate sprites?
01:06:42 - How much CPU does this all utilize?
01:07:32 - Fixing busy looping of the SDL demos
01:08:43 - Implementing the rotating square sprite
01:12:18 - Hallucinating triangles
01:13:56 - It didn't work
01:14:18 - Got an artistic inspiration!
01:15:56 - It worked!
01:16:18 - And it even rotates!
01:16:39 - Putting the texture onto the rotating square
01:18:40 - Hard proof that you must program only in Rust
01:19:14 - New Twitch emote was just born
01:20:20 - ISN"TTHATPAWG?!11
01:21:17 - Saving the glitch as a PNG
01:22:20 - Rediscovering the diagonal of a square like an Ancient Greek
01:24:33 - stb_image_write.h
01:27:11 - Adding new emote
01:29:55 - Fixing the UV coordinates
01:32:09 - It worked! Let's make it rotate!
01:32:41 - And it's slow af!
01:33:23 - The next step is to do that in 3D
01:35:06 - Maybe eventually we will reimplement the whole OpenGL
01:35:54 - Memory safety concerns
01:37:33 - Recap of what we are doing
01:39:06 - QnA
01:39:18 - QnA: Have you looked into coding microcontrollers?
01:39:40 - QnA: What keyboard do you use?
01:40:39 - QnA: What programming language are you using?
01:41:41 - QnA: Is there USB-C keyboard?
01:42:28 - QnA: Any plans for AoC 2022?
01:42:58 - QnA: Did you try Python?
01:43:23 - QnA: Chat is making fun of me :(
01:43:43 - QnA: Can you do OS related stuff in Python?
01:45:11 - QnA: Python is a good language!
01:45:25 - QnA: Have you head about Julia?
01:45:41 - QnA: Is JavaScript even JavaScript?
01:46:02 - QnA: Is Java interpreted or compiled language?
01:46:19 - QnA: How do you write Clean Code?
01:49:20 - QnA: How to be successful Software Developer
01:51:19 - Trying to raid somebody
01:53:20 - Giving up on raiding and signing off
01:53:35 - Smooch
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