OpenGl
glEnable(GL_EPIC);
glEnable(GL_EPIC);
OpenGL (Open Graphics Library) is a API for rendering 2D and 3D graphics. It's is available in a number of versions and on many platforms. These pages aim for version 4.3.
The Basic Stuff
The statemachine
OpenGl is a state machine and the state is stored in the context of OpenGL and the objects created in the context. By using functions you can modify the state in the context or the objects and by setting objects as active you can change many states at the same time. When drawing something it is using the current state to decide what shows up on the screen. Opengl objects are namned using GLuint values. Values are reserved using the glGen* and deleted with dlDelete*. The resulting name can be any value besides 0 and they are used with glBind*. There is also a function glIs* that can be used to check if a opengl object is of a specific type.
void glGen*(GLsizei n, GLuint *arrays);
GLboolean glIs*(GLuint array);
void glBind*(GLuint array);
void glDelete*(GLsizei n, const GLuint *arrays);
The Interface
OpenGL use the prefix gl for OpenGL commands. Constants begin with GL_ and use all capital letters. Some functions comes in many versions and they then use suffix to specify the number of arguments and the return type. Ex glColor3f takes 3 floats and glColor4d takes four double.
The Extensions
OpenGL Extensions - 2012
Sad facts about OpenGL extension libraries - 2010
Guide
Buffers: Buffer objects are used to store data that one use in or get from opengl.
Textures: Contains one or more images and are used from shaders or used as a render target.
GLSL: The shading language used in OpenGL.
Drawing: Rendering can be indexed (*elements) or non-indexed (*arrays).
Framebuffer: Select what to draw to.
Links
Tutorials
Modern OpenGL - 2014
Learn OpenGL - 2014
Open.Gl - 2013
Graphics Programming 3 - 2012
Opengl tutorials - 2011
OpenGL 3.3 Tutorials - 2011
Moden OpenGL Tutorials - 2010
Effects
Did you arrive from DirectX?
Reference
WebGL + Rust: Basic Water Tutorial - 2019
Volume Rendering with WebGL - 2019
OpenGL Renderer Design - 2016
Reversed-Z in OpenGL - 2016
OpenGL like Vulkan - 2016
GPU-Driven Large Scene Rendering in OpenGL - 2015
Bringing Unreal Engine 4 To Opengl (video) (slides) - 2014
Moving Your Games to OpenGL - 2014
OpenGL Scene Rendering Techniques - 2014
Quad Meshes - 2013
Clip Planes - 2012
Modern OpenGL - 2012
OpenGL vs DirectX: The War Is Far From Over - 2011
Unit testing OpenGL applications - 2010
Going mobile with OpenGL ES - 2010
An introduction to OpenGL 4.1 - 2010
A brief preview of the new features introduced by OpenGL 3.3 and 4.0 - 2010
Software
AMD CodeXL - A GPU debugger/profiler for OpenGL.
Emulating Command Buffers in OpenGL - 2019 : Part 1 & Part 2
Alpha compositing, OpenGL blending and premultiplied alpha - 2015
Porting from DirectX11 to OpenGL 4.2: API mapping - 2013
Porting from DirectX11 to OpenGL 4.2: Tales from the trenches - 2013
Porting from DirectX11 to OpenGL 4.2: Textures & samplers - 2013
Modern openGl - 2012
Instance culling using geometry shaders - 2010
Uniform Buffers VS Texture Buffers - 2010
A brief preview of the new features introduced by OpenGL 3.3 and 4.0 - 2010
Instance Cloud Reduction reloaded - 2010
The history of opengl vertex data
How powerful can WebGL be in comparison with native OpenGL?
Instanced Line Rendering - 2019
WebGL/WebGPU/three.js Resources
http://www.realtimerendering.com/webgl.html
Learn OpenGL
[video] Spot lights in OpenGL
https://www.youtube.com/watch?v=MAJqiDll0a8
[video] Specular Lighting in OpenGL
https://www.youtube.com/watch?v=dJo1Ao9XydM
[video] Skeletal Animation In OpenGL using Assimp - Part 2
https://www.youtube.com/watch?v=pb6KZPaDBBY
Skeletal Animation In OpenGL using Assimp - Part 1
https://www.youtube.com/watch?v=r6Yv_mh79PI
From GLSL to WGSL: the future of shaders on the Web
https://dmnsgn.medium.com/from-glsl-to-wgsl-the-future-of-shaders-on-the-web-bebc0c3df5c0
WebGPU Best Practices
https://docs.google.com/presentation/d/1Q-RCJrZhw9nlZ5py7QxUVgKSyq61awHr2TyIjXxBmI0/edit#slide=id.p
HOW TO DEBUG Your OpenGL Code
https://www.youtube.com/watch?v=Wk145_jUsBk&feature=youtu.be
HOW TO DEBUG Your OpenGL Code
https://www.youtube.com/watch?v=Wk145_jUsBk&feature=youtu.be
Clipping and viewport mapping in OpenGL
https://www.youtube.com/watch?v=J5Tqvs6RzGs
Modern OpenGL Tutorial - Tessellation Shaders
https://www.youtube.com/watch?v=21gfE-zUym8
How to Select 3D Objects With The Mouse Using OpenGL
https://www.youtube.com/watch?v=71G-PVpaVk8
Modern OpenGL - Compute Shaders
https://www.youtube.com/watch?v=nF4X9BIUzx0