t2

t2 is an interactive ray tracer. It is written in C and OpenCL C and runs on OpenCL-compatible devices.

Features:

• Progressive rendering with keyboard and mouse input for camera navigation
• Thin lens camera with depth of field (see lens radius setting)
• Monte Carlo rendering (see sample root setting)

Building

Right now t2 only builds on OS X. To install dependencies and build:

$ brew install homebrew/versions/glfw3
$ brew install glew
$ brew install freetype
$ make

Running

Run with defaults:

$ ./t2

or get help to learn about settings to change:

$ ./t2 -h

Keyboard Controls

• Esc, q - Quit
• a - Move left (strafe)
• d - Move right (strafe)
• w - Move forward
• s - Move backward
• -/+ - Decrease/increase trace depth
• r/R - Decrease/increase lens radius
• o - Toggle overlay display
• t/T - Decrease/increase sample root
• Space - Pause/resume progressive sampling (useful when batch sizes result in jerky movement)

Mouse Controls

• Hold left mouse button and move: change camera viewing direction (left-right only)