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raytracerAn implementation of raytracing in modern C++, based on code from the Ray Tracing in One Weekend book series. This implementation uses multi-threading, ranges, and imgui to provide an interactive rendering experience.UI controls include:Field of viewCPU thread/worker countXYZ camera positionIJK camera "look at" positionSamples count to control render qualityGlobal shade control for "day" or "night" rendering"balls" window: Add or remove spheres and set each sphere's material, size, and positionThe UI also does low-quality "live" rendering as settings are changed; click "recalculate" to render in high-quality. The visible render can be exported as a PNG image to the current directory.Build instructionsDownload imgui submodule via git submodule.Have GCC, GNU Make, and SDL2 installed.Run 'make'.The final program binary is called main.