Timeline for BRDF and Spherical coordinate in ray tracing

6 events

when toggle format	what		by	license	comment
Jun 18, 2020 at 8:32	history	edited	CommunityBot		Commonmark migration
Dec 11, 2015 at 20:54	vote	accept	Fabrizio Duroni
Dec 11, 2015 at 19:11	comment	added	Nathan Reed		@FabrizioDuroni I assume you're familiar with how to convert between coordinate systems in general? For tangent space you just have to set up coordinates using the surface normal plus some two vectors perpendicular to it as the axes. For normal mapping, the two vectors are often chosen to match the texture space U and V axes (as mapped to the particular surface). For isotropic BRDFs without normal mapping, it doesn't really matter.
Dec 11, 2015 at 12:19	comment	added	Fabrizio Duroni		Thank you so much for your help @NathanReed. One last question: do you have any good reference material on how to calculate the tangent space and convert my vectors wi and wo to the coordinate space for ray tracing/BRDF? At the moment I didn't find any useful one. In this way I would be able to do some comparison between the way with tangent space and the way using vectors math.
Dec 11, 2015 at 6:27	history	edited	Nathan Reed	CC BY-SA 3.0	added 127 characters in body
Dec 11, 2015 at 6:18	history	answered	Nathan Reed	CC BY-SA 3.0