What are WebGL shaders and how do they work?

What are WebGL shaders and how do they work?

WebGL shaders are programs written in GLSL that run on the GPU to control the rendering of graphics. They allow for advanced visual effects.

Can you explain the difference between vertex shaders and fragment shaders?

Sure! Vertex shaders process vertex data and determine their position in 3D space, while fragment shaders handle the color and texture of pixels.

How do I write a simple vertex shader?

A simple vertex shader can be written in GLSL like this:

attribute vec4 a_position;
void main() {
    gl_Position = a_position;
}

This shader takes vertex positions and outputs their final position.

What tools can I use to test my WebGL shaders?

You can use tools like ShaderToy, WebGL Inspector, or the built-in developer tools in browsers like Chrome to test and debug your shaders.