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Gradient Starfield

✓ Published1🌍 Public

Last edited Oct 9, 2025

Created on Aug 2, 2025

This example shows a 3D starfield animation with 2,000 colorful stars moving through space and slowly rotating around the center. It runs on HTML5 Canvas and vanilla JavaScript, using `requestAnimationFrame` for smooth animation. Stars are generated with random positions, sizes, speeds, and colors, then rendered with perspective projection and recycled when they exit the viewport. The code uses trigonometric functions for rotation and a perspective factor for depth perception, with a translucent background to create subtle trails.

AI-generated description

3D Rotating Starfield

An interactive 3D starfield animation built with HTML5 Canvas and vanilla JavaScript. Features a rotating perspective view with colorful stars moving through 3D space.

Features

3D Perspective: Stars move through 3D space with realistic depth perception
Rotation Effect: The entire starfield slowly rotates around the center
Colorful Stars: Each star has a randomly generated color
Trail Effects: Stars leave subtle trails as they move
Responsive Design: Automatically adjusts to window size changes
Smooth Animation: Uses requestAnimationFrame for optimal performance

How it Works

2000 stars are generated with random positions, colors, sizes, and speeds
Each star exists in 3D space (x, y, z coordinates)
Stars rotate around the center using trigonometric functions
Perspective projection creates the illusion of depth
Stars that move off-screen are recycled to the back of the scene

Usage

Simply open index.html in a web browser. The animation starts automatically and fills the entire viewport.

Customization

You can adjust various parameters in script.js:

numStars: Number of stars (default: 2000)
MIN_STAR_SIZE / MAX_STAR_SIZE: Star size range
MIN_SPEED / MAX_SPEED: Star movement speed range
PERSPECTIVE_FACTOR: Controls depth effect intensity
ROTATION_SPEED: How fast the starfield rotates

Files

index.html: Main HTML structure
script.js: Animation logic and 3D calculations
styles.css: Basic styling for full-screen display

MIT Licensed

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