This project has only been tested on MacOS. It is not guaranteed to work on other platforms.

• Install googletest (brew install googletest on MacOS)
• Install boost
• Go to project root directory mkdir build
• cd build
• cmake ..
• make

./project3 {input_file}

• Everything in 3A

Below is a modified version of outdoor.txt, which swaps the materials for each sphere. The sphere on the left is reflective and the sphere on the right is transmissive with an ior of 1.5

The same image with a 1.1 transmission on the right sphere is

with a 1.01 transmission

and finally with 1.00 transmission

Here is the outdoor.txt file with only reflections and no transmissive term

Here is sphere2.txt unmodified for reference

Here is spheres 2 with recursion to a bounded depth of 2 (which was the default)

The same with a bounded depth of 1 is

We can see that the red sphere on the right of the yellow sphere is more illuminated with a bounded depth of 2 than 1.

and with a bounded depth of 0 is

There are no reflections as the depth is limited so no can occur.

Here is outdoor.txt with only one triangle

Here is outdoor.txt but with a triangle replaced with a plane

Here it outdoor.txt but with one vertex in the plane shifted up a bit.

A modified version of outdoor.txt with a box

We start with 50 samples per pixel on the file spheres1.txt

The viewpoint is adjusted slightly

camera_pos: -6 3 -2

• This should be clear

• This should be clear

• This should be apparent by the default image

• This should be apparent by the default image

• This should be apparent by the default image

• I added a custom command samples: {#} to determine the number of samples
• The first sample is always at the center of the pixels
• The rest are randomly distributed between the pixel boundary
• This makes 1 sample equivalent to basic sampling and n > 1 samples equivalent to jittered sampling

• results in jagged edges

• smoother result like box-filtering.

• This should be apparent by the default image

The code is implemented in C++. Some interesting features

• I really like immutable data, so I made a macro #define let const auto
• There are no switch statements for strings in C++. This is an issue for parsing commands. To get around this I made an unordered map of string to enum and then used the switch statement on the enum.
• I use modern C++ 17 features such as destructuring and default nested struct values

• Most of the logic occurs in Scene class
• Collision uses the quadratic formula
• Collision which occurs with a t-value less than 0.001 is ignored (to prevent shadow acne)
• For each sample loops over all lights and sees if can reach it (to do this needs to iterate over all spheres)
• Shades with appropriate formulas

• See the Features/Sampling section

• The switch statements described in the previous

• So far, I do not see any issues in my code (apart from missing features)
• If there is an issue, feel free to create a GitHub issue.