Browsing appleseed Source Code

The Woboq code browser is very nice to read code because it has full cross-referencing:
http://code.woboq.org/appleseed/appleseed/

Top-level Libraries

src/appleseed/foundation/: base code, utilities, etc. Nothing specific to rendering.
src/appleseed/renderer/: the entire renderer is there.
src/appleseed/main/: entry point of the appleseed shared library / DLL.

src/appleseed/renderer/kernel/intersection: intersection subsystem, built on top of the generic BVH code and relying on the low-level intersection primitives.
src/appleseed/renderer/kernel/lighting/pathtracer.h: generic path tracing loop used whenever a path needs to be traced.
src/appleseed/renderer/kernel/lighting/pt/ptlightingengine.cpp: unidirectional path tracer.
src/appleseed/renderer/modeling: all the entities to model a scene are defined there.
src/appleseed/renderer/modeling/bsdf/bsdf.h: the interface that a BSDF must implement.
src/appleseed/renderer/modeling/bsdf/lambertianbrdf.cpp: implementation of one of the simplest BRDF, the Lambertian BRDF.
src/appleseed/renderer/kernel/rendering/generic/genericsamplerenderer.cpp: the code that renders a single pixel sample.
src/appleseed/renderer/kernel/rendering/final/uniformpixelrenderer.cpp: the code that renders a single pixel (uniform, non-adaptive sampling).
src/appleseed/renderer/kernel/rendering/final/adaptivepixelrenderer.cpp: the adaptive version.

src/appleseed.cli/main.cpp: entry point of appleseed.cli, the command line interface of appleseed.
src/appleseed.cli/main.cpp: function that renders a project file in appleseed.cli.

src/appleseed.studio/main/main.cpp: entry point of appleseed.studio, the graphical user interface of appleseed.

The "hottest" functions when rendering (the ones that have the biggest impact on performances):