Appendix a : Pseudo - Code for Specular - Diffuse Radiosity

If no source interactions were subdivided: For each source interaction: Gather radiosity from source interaction. If not a leaf interaction: Push specular radiosity to each child. Create a radiosity gathering task for each child. Else (interaction is a leaf): Set interaction's radiosity Pull specular radiosity up the interaction tree. Else (some source interactions were subdivided): Record that the destination interaction needs to gather radiosity from its list of source interactions with uncalculated visibility. If count of source interactions with uncalculated visibility has already dropped to 0: Create a radiosity gathering task for the destination interaction Visibility Task For each child of the interaction that was just subdivided: If child interaction's visibility has already been computed or a task to compute its visibility has already been created. Return. Compute the source and destination patches' mutual visibility. For each destination interaction waiting for this interaction to have its visibility computed: Decrement the destination interaction's count of source interactions with uncomputed visibility. If the count has dropped to 0: Create a radiosity gathering task for the destination interaction. Create a radiosity gathering task for the source interaction.