4.0.0

Release 4.0.0

6/18/2019 sh-coursework

Optimization

• 2/26/2019 BVHRoot optimization from 1.3.1 -> 2.0.0 - remove extraneous layer.
  Initially, when I converted to smart pointers, my render of the book 2 test
  scene jumped from 20921 sec to 21211 sec - so approx a 1% hit. But I think it
  was from imposing an extraneous redirection of the hit function in bvh_root.
  Correcting that brougt the time back down to 20825 sec.
• 5/21/2019 Got rid of scatter_record and defining pdfs inside the materials
  themselves. Still preparing for brdf, but in Peter's book 3, the later
  architecture with the scatter record creating pdf objects on the heap
  (using "new" to allocate) significantly slowed things down. The book 2
  test scene went from about 20825 sec (see above bvh optimization) to
  about 24028 sec. Refactoring to avoid most of the allocating/destroying
  the pointers that were happening per-ray-bounce and removing the whole
  scatter record brought the time down to 22389. Still not all the way back,
  but at least clawed back some time.
• 6/1/2019 Added scene for rotate test - a bunch of rotated cubes.
  • Moved rotate to template.
  • Rotate-X, rotate-Z
• 6/9/2019 move light list definition from main to scene generation.
• 6/9/2019 Implement Random for XY, YZ
• 6/9/2019 Refactor scene generation to modify incoming render context.
  No longer has return values.
• 6/18/2019 Audit for smart pointers to manage ownership in materials.
  Note that this does not mean the elimination of raw pointers. For instance,
  materials and textures are managed by lists in the render context, so
  those use smart pointers. But in geometry, I consider the material
  binding to be just a reference, and is not managing lifetime.A
• 6/18/2019 Expanded on the render context for material and texture lists.
• 6/18/2019 Added skydome to support old tests
• 6/18/2019 Added check to lambertian - make sure hitable list is populated
  to use HitablePdf.

3.0.1

cleaned up .md files, removed .idea directory

3.0.0

Release 3.0.0

1/29/2019 sh-coursework

Features

• Upgrade OIIO to 2.x.x (uses unique_ptr for create),
  update CMakeLists.txt file to use find_package, not find_library.

Work from book 3

• Chap 4 - probability distribution functions
• Chap 5 - random cosine direction
• Chap 6 - orthonormal basis
• Chap 7 - sampling lights directly
• Chap 8 - mixed density
• Chap 10 - refactor pdf - through the end with De-NaN

Cleanup

• Continue smart pointer refactor to use make_shared

2.0.0

Code cleanup

• Book 1 online comments point out Dielectric repeats scatter in reflect.
• Get rid of some unused variables.
• Changed signatures of Translate and RotateY constructors to put child last.
  This should be easier to read when transforms are chained together.
• Converted all geometry and transforms to smart pointers.
  Still need to do materials and textures - maybe later for shader binding.

1.3.1

Cleanup

• Port to Ubuntu on Windows Subsystem for Linux.
  Originally, I just chose the version I first downloaded on the Mac.
  But it seems to work with the earlier versions on Windows
  so let's go with that.
  • Lower CMake minimum from 3.12 to 3.10
  • Lower boost minimum from 1.67.0 to 1.65.1.
• Ubuntu compiler caught a couple missing includes for memory in bvh_node.h and hitable_list.h.

v1.3.0

Work from book

• Book 2, Chapter 6 - Rectangles and Lights, through Cornell Box walls
• Book 2, Chapter 7 - Instances, box, translate, rotate-Y, Cornell Box
• Book 2, Chapter 8 - Volumes
• Book 2, Chapter 9 - Putting it all together

Other cleanup

• Cleaned up variable names for t_min and t_max for consistency.
  Though it's still ambiguous if t is time or the line parametization.
• Moved flip_normals from scene_geometry to transforms subdir.

v1.2.0

Clang-tidy cleanup

• avoid the repeating return tipe from the declaration...
• use '= default' to define a trivial default constructor
• 'virtual' is redundant since the function is already declared 'verride'
• Single-argument constructors must be marked explicit...
• Update headers float -> cfloat, math->cmath, stdlib->cstdlib
• Parameter .. is const-qualified in the function declaration; ...

Code Style

• Make class names CapitalizedCamelCase.
• Put open curly brace on starting line, not by itself on next line.
• Wrap long lines.
• More consistency with include order, with self include file first.
• Keep function name on same line as return value when possible.
• Clean up function/method names to CapitalizedCamelCase.
• Clean up class member names to end with underscore.

Other cleanup

• Moved reflection and unit sphere utility functions into vec3.
• use standard algorithm min/max instead of my own inline.

v1.1.0

Release 1.1.0

Work from book

• Book 2, Chapter 3 - Textures, checkered sphere scene
• Book 2, Chapter 4 - Perlin noise, turbulence, marble-like
• Book 2, Chapter 5 - Image Textures, but using openimageio

Other modifications outside of book

• Render time progress output

• boost - initially for irange, bu you never know.
  I could easily imagine wanting to use vector or more.

• openimageio - I wanted to output something better than ppm,
  and also wanted to get some experience with openimageio.

• First pass reorganization to use include and src subdirs.

• Moved render settings into a separate module, and added
  commmand line parser and config file parser to make testing easier.

• 10/25/2018 sh-coursework - Get rid of raw hitable **,
  use vector and smart pointers in hitable_list and bvh_node.
  Change bvh_node implementation from qsort to sort.
  Rendering the same scene in bvh mode
  originally took 108.4 sec and is now 94.2 sec, though I only
  measured one run each.

• 10/27/2018 sh-coursework - Added row percent to progress report.
  Moved scene generation(geometry and camera) to module outside
  main. Started using tuple return values and tie.

• 10/28/2018 sh-coursework - Implemented image texture as openimageio.

  • Also, changed image texture to do the work of reading the image
    internally given the filename.
  • Adjusted metal to point at texture instead of vector,
    like lambertian does.

initial checkin for raytracer2

(from the initial release README.md)
This is still more or less a copy of code transcribed from
Peter Shirley's "Ray Tracing in One Weekend".
I wanted to use this as an exercise to add more
modern c++ (11) features, but I'm nowhere near done.

In raytracer2, I'm working through the second book,
"Raytracing, The Next Week".

Minor modifications done in raytracer1

• I try to split the function implementations off into
  cpp files. Peter implements everything in .h files.
• I try to use "auto" a little bit. Though admittedly,
  not everywhere that I probably could.

Work in raytracer2

• Book 2, Chapter 1 - motion blur
• Book 2, Chapter 2 - BVH (Bounding Volume Hierarchies)
• Render time progress output
• boost - initially for irange, bu you never know.
  I could easily imagine wanting to use vector or more.
• openimageio - I wanted to output something better
  than ppm, and also wanted to get some experience with
  openimageio.
  Halfway implementation - uses both ppm and jpg.

Stuff I plan to work on:

• Get rid of "new" - convert to smart pointers
• Move includes into their own area
• Move render settings (resolution, samples) to an external
  file with yaml and/or argparse
• Clean up variable and class names
• Investigate boost/stl vector for hitable_list
• Address more of CLion's Clang tidy warnings.