A high-level, general-purpose programming language, created as an extension of the C programming language, that has object-oriented, generic, and functional features in addition to facilities for low-level memory manipulation.
I'm not aware of a single, official "OpenGL SDK" to download. Instead, OpenGL functions are built directly into your operating system and graphics hardware drivers. To use OpenGL in your own programs, you'd download supplementary helper libraries (like GLFW and GLEW) and the latest drivers for your graphics card.
OpenGL versions and hardware acceleration are tied to your GPU, so update your graphics card drivers to the latest versions. This should automatically provide support for modern OpenGL features on your machine.
- NVIDIA from the NVIDIA Driver Downloads page.
- AMD via the AMD Drivers and Support portal.
- Intel from the Intel Driver & Support Assistant.
Raw OpenGL headers are difficult to manage, so you would want to download open-source libraries to handle window creation, context management, and extension loading.
- Windowing & Context (GLFW): the latest builds (or source code) from the GLFW Official Website.
- Extension Loader (GLEW): the source or binaries via the GLEW SourceForge Page.
- Extension Loader (GLAD): use the Glad Web Generator to generate and download a custom loader tailored to the specific OpenGL version you need.
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hth
Marcin