How Shaders Work (in OpenGL) | How to Code Minecraft Ep. 3
4,409Join the Discord: https://discord.gg/4tHeAkxNg7
Follow me on Twitch: https://www.twitch.tv/gameswthgabe
In this episode I do a deep dive into the code and concepts behind GLSL shaders. I go over everything from how to construct them, compile and link them, and execute them on the GPU to how to think about shaders conceptually. This is the next episode in the Coding Minecraft tutorial series. In the next episode I will be covering dynamic textures and texture UVs.
Challenges: https://github.com/codingminecraft/MinecraftCloneForYoutube/tree/master/Challenges#episode-3-shaders
Planet Shader (HamzaHutchinson): https://www.shadertoy.com/view/llj3zV
Plus Shader (Nimitz): https://www.shadertoy.com/view/4slXW7
Sierpenski Fractal Shader (Klems): https://www.shadertoy.com/view/XljSWm
3Blue1Brown Linear Transformations: https://www.youtube.com/watch?v=kYB8IZa5AuE
Shader Versions: https://en.wikipedia.org/wiki/OpenGL_Shading_Language#Versions
GLSL Builtin Variables: https://www.khronos.org/opengl/wiki/Built-in_Variable_(GLSL)
Vector Constructors: https://www.khronos.org/opengl/wiki/Data_Type_(GLSL)#Vector_constructors
Vector Types: https://www.khronos.org/opengl/wiki/Data_Type_(GLSL)#Vectors
glCreateShader: https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glCreateShader.xhtml
glUniform: https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glUniform.xhtml
Qualifier Order: https://www.khronos.org/opengl/wiki/Type_Qualifier_(GLSL)#Qualifier_order
My code: https://github.com/codingminecraft/MinecraftCloneForYoutube/tree/a17b58184df76ace1c428563b9eafc3ed426d8dc
Bookmarks:
0:00 Intro
1:00 Subscribe!
1:13 Vertex Shader Transformations
3:31 Coding the Transformation Matrix
4:23 Coding the View Matrix
5:48 Coding the Projection Matrix
7:04 How GLSL Works
10:41 GLSL Custom Constructors
11:15 Vector Swizzling
12:43 Compiling Shaders
13:49 Error Checking Compilations
15:30 Linking Shaders
16:24 Error Checking Linking
17:19 GLSL Reflection
19:56 Uploading Uniforms
21:11 In/Out/Flat Keywords
24:00 Shaders Conceptually
Shaders at the end of the video:
(by Kali): https://www.shadertoy.com/view/NlsXDH
(by knarkowicz): https://www.shadertoy.com/view/XtlSD7
(by EvilRyu): https://www.shadertoy.com/view/Xd3fR7
Book of Shaders: https://thebookofshaders.com/
Music from Music Vine
Fire (by Raft): https://musicvine.com/track/raft/fire
The Gift (by Onsoho): https://musicvine.com/track/onsoho/the-gift
Blue Waltz (by Yoav Ilan): https://musicvine.com/track/yoav-ilan/blue-waltz
“The Soft Block” licensed via Music Vine: 5KEXLAZZUKPIVGS2
Muse (by Braden Deal): https://musicvine.com/track/braden-deal/muse
Tell Your Story (by Adi Goldstein): https://musicvine.com/track/adi-goldstein/tell-your-story
“Fickle” licensed via Music Vine: ZX7THVN1L1UQWYD0
---------------------------------------------------------------------
Website: https://ambrosiogabe.github.io/
Github: https://github.com/ambrosiogabe
Here are some books I recommend if you want to learn about game engine development more thoroughly. I do not profit off any of these sales, these are just some books that have helped me out :)
My Recommended Game Engine Books:
Game Engine Architecture: https://www.gameenginebook.com/
Game Physics Cookbook (Read this before the next physics book): https://www.amazon.com/Game-Physics-Cookbook-Gabor-Szauer/dp/1787123669
Game Physics (Ian Millington): https://www.amazon.com/Game-Physics-Engine-Development-Commercial-Grade/dp/0123819768
Game Programming Patterns (Free): https://gameprogrammingpatterns.com/
My Recommended Beginning Game Programming Books:
JavaScript Game Design: https://www.apress.com/gp/book/9781430247166
My Recommended Java Books:
Data Structures/Algorithms: https://www.amazon.com/Data-Structures-Algorithms-Java-6th-ebook/dp/B00JDRQF8C
LWJGL (Free, but I haven't read this thoroughly): https://lwjglgamedev.gitbooks.io/3d-game-development-with-lwjgl/content/