38 lines
1.5 KiB
Markdown
38 lines
1.5 KiB
Markdown
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<!----------------------------------------------------------------------------
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Copyright @ 2021-2022 Codam Coding College. All rights reserved.
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See copyright and license notice in the root project for more information.
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----------------------------------------------------------------------------->
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# Shaders
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In computer graphics, a shader is a type of computer program used for shading in 3D/2D scenes (the production of appropriate levels of light, darkness, and color in a rendered image). MLX42 exposes the shaders and compiles them into the library for portability.
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```glsl
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// Example of shader code, GLSL is similar to C but not quite.
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#version 330 core
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layout(location = 0) in vec3 aPos;
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layout(location = 1) in vec2 aTexCoord;
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out vec2 TexCoord;
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uniform mat4 ProjMatrix;
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void main()
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{
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gl_Position = ProjMatrix * vec4(aPos, 1.0);
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TexCoord = aTexCoord;
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}
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```
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## Beware
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Shaders aren't really meant to be used by students but are more there for the convenience of developers. (though some advanced students might make some use of them)
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# Compiliation
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Shaders are converted into a `.c` appropriate format and then compiled into the library and referenced via a `extern` global variable appropriately named `vert_shader` & `frag_shader`. The reason this is done is to keep the final game/executable portable, that is being able to use it at any given location within a filesystem, while still being easy to work on the shaders instead of having to mess with it in the `.c` files directly.
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