What are OpenGL fragment shaders?

What are OpenGL fragment shaders?

OpenGL fragment shaders are programs that run on the GPU to determine the color and other attributes of each pixel.

How do I write a simple fragment shader?

To write a simple fragment shader, you need to define the main function and set the output color using the 'gl_FragColor' variable.

Can you show me an example of a basic fragment shader?

Sure! Here's a simple example:

#version 330 core

out vec4 FragColor;

void main() {
    FragColor = vec4(1.0, 0.0, 0.0, 1.0); // Red color
}

What tools can I use to test my fragment shaders?

You can use tools like ShaderToy, GLSL Sandbox, or integrate them into your OpenGL application for testing.