infinite-3d-floor-python3

A personal challenge creating yet another demoscene'ish (cracktro) program in Python3, showing off classic Amiga "infinite floor" perspective graphics effect, with accompanying scrolling copper raster text with water shimmering and a bouncing Boing Ball, On Linux :P

Demo video: https://www.youtube.com/watch?v=n1PZppBHraM

Made with Python3 using PyGame that implements effects using accelerated blitter functions.

Should work on any Linux distribution (or Windows for that matter) that has Python3 + PyGame + NumPy.

Chiptune track provided by CallRoll (Track01.wav).

Required:

sudo apt-get install python3 python3-pygame python3-numpy

Usage:

$ ./infinite-3d-floor.py -f / --fullscreen /  -w 1280 -h 720 / --width 1280 --height 720

How:

• Perspective Floor: map the 2D screen pixels of the bottom half of the screen into 3D world space using a depth divisor (Distance $Z = \frac{\text{Camera Height}}{Y}$).
• Rotozoomer Overlay: A smaller, floating texture (like a logo or text) spinning and scaling smoothly across the screen, rendered directly into the pixel buffer on top of the 3D floor.
• Boing Ball: The "Boing Ball" is the ultimate crown jewel of the Amiga demoscene! To do it justice, we won’t just move a flat 2D sprite around. We will use NumPy to calculate a true 3D raycasted sphere with a wrapping checkerboard texture that dynamically rotates and depth-shades itself using volume lighting every single frame.
• "Copper" Raster Text + Shimmering Water Reflection: horizontal scrolling "copper" raster text, computing a second set of inverted pixels rendered below the text, then applying high-frequency trigonometry to create a shimmering water effect.
• "Copper" Raster Bars: classic Amiga "Copper" raster bar effect, we draw thick, horizontal gradients that sweep up and down the Y-axis using overlapping sine waves.