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Miloslav Ciz 2022-05-01 16:02:11 +02:00
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shader.md
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@ -4,7 +4,7 @@ Shader is a program running on the [graphics processing unit](gpu.md) (GPU), typ
The word *shader* is also used more loosely to stand for any specific effect, material or look in 3D graphics (e.g. [games](games.md)), as shaders are usually the means of achieving such effects.
Shaders are normally written in a special **shading language** such as [GLSL](glsl.md) in the [OpenGL](opengl.md) [API](api.md), [HLSL](hlsl.md) ([proprietary](proprietary.md)) in [Direct3D](d3d.md) API or the Metal shading language ([proprietary](proprietary.md)) in [Metal](metal.md) API. These languages are often similar to [C](c.md) with some additions (e.g. vector and matrix data types) and simplifications (e.g. no function [recursion](resursion.md)).
Shaders are normally written in a special **shading language** such as [GLSL](glsl.md) in the [OpenGL](opengl.md) [API](api.md), [HLSL](hlsl.md) ([proprietary](proprietary.md)) in [Direct3D](d3d.md) API or the Metal shading language ([proprietary](proprietary.md)) in [Metal](metal.md) API. These languages are often similar to [C](c.md) with some additions (e.g. vector and matrix data types) and simplifications (e.g. no function [recursion](resursion.md)). High level [frameworks](framework.md) like [Blender](blender.md) many times offer [visual programming](visual_programming.md) (point-n-click) of shaders with graph/node editors.
Initially (back in the 90s and early 2000s) shaders were used only for graphics, i.e. to transform 3D vertices, draw triangles and compute pixel colors. Later on as GPUs became more [general purpose](gpgpu.md), flexibility was added to shaders that allowed to solve more problems with the GPU and eventually general *compute* shaders appeared (OpenGL added them in version 3.3 in 2010).