Better Tubular

v1.0.0 - Tubular!

A high-performance CPU software renderer written from scratch in C. Extrudes millions of smooth, colourful tubes along procedurally-transformed Bezier curves with zero stored meshes.

Pipeline highlights:

• Bezier extrusion - de Casteljau evaluation with stable reference frames
• Multithreaded rendering - pthreads job dispatch, shadow pass + main pass
• Frustum culling - AABB clip space testing, distance based LOD
• Gouraud shading - per vertex lighting interpolated across scanlines
• Shadow maps - configurable resolution, light space depth test with bias
• SSAA - configurable internal rendering resolution with box filter downsampling
• ACES tone mapping - optional filmic highlight roll off
• Depth of field - pre blurred image pyramid with focal plane control
• Bloom - separable Gaussian glow on bright areas
• Exponential fog, background fill, vignette
• PNG & PPM output - zero external dependencies
• Dynamic thread count control

Performance: renders 2 million tubes with full post processing at 4K internal resolution on consumer hardware.

Build: standard C99 + pthreads, Makefile included.