HJRT

HJRT is a portable C++14 path tracing renderer which renders image using naive brute force path tracing algorithm.

Features

• basic material and texture
• spherical environment map
• multi-thread and spiral block rendering
• BVH
• depth of field and motion blur
• obj model loading
• participating media rendering, eg, fog
• multi-format image export, eg, ppm, jpg, png, exr
• multiple importance sampling
• adaptive sampling
• multi-integrator
  • direct illumination
  • path tracer
  • explicit lighting path tracer

HJRT uses Dear Imgui as program GUI to show rendering result and progress real-time, check it out.

More results:

   

left: MIS @ 20spp took 22s;       center:PT @ 20spp took 31s;       right:PT @ 200spp took 3m50s

Multiple Importance Sampling

   

Motion Blur

   

left: Path Tracer;       center: Explicit Lighting Path Tracer;       right: Direct Illumination

Integrators

Acknowledge

This project is inspired by

Ray Tracing from the Ground Up 1st Edition

smallpt

ray tracing in one weekend

More functions come soon or never