← Lab homeAn interactive sandbox bringing Pretext's text layout and animation capabilities to life with multiple immersive modes in a single destination.
What It Does
The Pretext Playground is the ultimate introduction to what's possible with the Pretext library. This showcase combines four distinct interactive experiences that demonstrate the breadth of text manipulation, animation, and real-time responsiveness that Pretext enables. Users can interact with an ASCII dragon that responds fluidly to mouse movements, watch letters behave like physics-driven particles with gravity and collision, witness dramatic fire breathing effects rendered entirely in text, and navigate through a disorienting 3D text tunnel that creates depth on the ASCII canvas. Each mode is carefully crafted to highlight different capabilities while remaining immediately accessible to newcomers exploring the library for the first time.
Technical Highlights
The Playground showcases Pretext's dual-layer approach to text rendering through intelligent use of the prepare() and layout() functions. In the ASCII dragon mode, prepare() dynamically generates character arrays that respond to mouse coordinates, while layout() positions each character with sub-character precision to create smooth, flowing movement. The physics letters mode demonstrates how prepare() can integrate with animation loops to update character positions based on simulated force vectors, with layout() handling the real-time repositioning at 60 frames per second. The fire breathing effect leverages prepare()'s ability to modulate opacity and character selection to create animated flames, while layout() ensures precise positioning of the fire particles within the canvas bounds. The 3D text tunnel combines perspective mathematics with both functions to create the illusion of depth, using character size variation in prepare() and careful coordinate transformation in layout().
Pretext APIs Used
| API Function | Application |
|---|---|
prepare() |
Dynamic character generation and animation updates |
layout() |
Real-time character positioning and viewport management |
| Event Listeners | Mouse tracking for interactive responsiveness |
| Canvas Integration | HTML canvas rendering of ASCII output |
How to Try It
Visit the live Pretext Playground directly in your browser. Start by moving your mouse across the ASCII dragon—watch how it parts and flows like water around your cursor. Switch between modes using the on-screen controls to explore physics simulation, fire effects, and the hypnotic 3D tunnel. The interactive nature of each mode invites experimentation, making it the perfect entry point to understand what Pretext can achieve. No installation required, and the code is fully open source on GitHub.
Built By
Created by 0xNyk, a developer passionate about pushing the boundaries of what's possible with text-based graphics. The Playground stands as a testament to the creative potential unlocked when you combine Pretext's powerful layout engine with interactive JavaScript event handling.
