WebGL for Beginners: A Hands-On Guide 2026

Learn to draw a red rectangle in WebGL by composing two triangles from centered vertices on the canvas, using -0.5 to 0.5 coordinates, then experiment with colors.

learn to render a rectangle in webgl by using a triangle fan with four centered vertices, assign per-vertex colors, and bind color buffers alongside position buffers.

Learn to create a multicolored rectangle in WebGL by assigning rgb colors to vertices, passing colors through a varying to the fragment shader, and adjusting attributes and strides.

Move the vertex code into its own vertex code.js file, export it, and import it into main.js with type module, then run with light-server.

Learn to separate fragment code into its own file and export it as fragment code js, then import it in main.js to keep vertex and fragment code clean and modular.

Add rotation controls for a WebGL triangle by wiring HTML buttons to JavaScript rotation patterns that rotate the triangle along the x, y, or z axes via a matrix library.

Explore constructing cube coordinates for a 3d cube in WebGL using two triangles per face, with front and back z-sign changes and consistent vertex order.

Render a 3D cube in WebGL by defining x, y, z coordinates for front, back, top, bottom, left, right faces, using buffers and shaders, and applying rotation and projection.

Apply rotational transformations to a WebGL cube using x, y, and z rotation matrices to expose all sides, with a model matrix sent to the vertex shader as a uniform.

Build an interactive code cube with x, y, and z rotation controls via buttons linked to IDs on a canvas. Use JavaScript event listeners and CSS to implement rotation patterns.

Learn to translate a WebGL cube on a canvas with arrow keys, updating translation along the x and y axes for up, down, left, and right.

Apply all we have learned to a textured cube through transformations, using a model matrix for rotations and translations, with vertex and fragment shaders and WebGL texture mapping.