go-trace's Introduction

go-trace

Implementing a Path Tracer so that I can teach myself the Go language.

Now with more concurrency! ✨

Following the E-book by Peter Shirley 'Ray Tracing in One Weekend', but in Go instead of C++.

I also wrote a series of posts chronicling the process on my blog.

Options

$ ./bin/go-trace -help
Usage of ./bin/go-trace:
  -a value
        camera aperture (default 0.010000)
  -cpus value
        number of CPUs to use (default 8)
  -fov value
        vertical field of view (degrees) (default 75.000000)
  -h value
        height of image (pixels) (default 500)
  -n value
        number of samples per pixel for AA (default 100)
  -o value
        output filename (default out.png)
  -version
        show version and exit
  -w value
        width of image (pixels) (default 600)
  -x float
        look from X (default 10)
  -y float
        look from Y (default 4)
  -z float
        look from Z (default 6)

Running

$ make
go build -o bin/go-trace github.com/markphelps/go-trace/cmd/go-trace

$ ./bin/go-trace

Rendering 600 x 500 pixel scene with 486 objects:
[4 cpus, 100 samples/pixel, 75.00° fov, 0.01 aperture]

[==========----------------------------------------------------------------------] 12.80%

Tests

$ make test

Output

The default output format is PNG and the default filename is out.png.

This can be changed by using the -o flag as described in the help output.

Ex: $ ./bin/go-trace -o output.jpeg

Current supported file extensions:

.png
.jpg
.jpeg

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go-trace's Issues

No tools needed on OSX (and probably other systems)

For OSX, you don't need any tools. Just "open out.ppm" and you will see it in preview.

Thanks for the start on the tracer. I am also following the book, but plan on making a more go-flavored tracer, with objects that know how to do the intersections and such. We will see how far I get. :)

I wrote a raytracer in C about 20 years ago or more now. Graphics has always been a joy, but I don't use it in my work life.

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