Skybar Posted December 27, 2014 Share Posted December 27, 2014 BRDFs is still somewhat of a blackbox for me. I have no idea what it is. All I really know is that a BRDF has yellow connections, and if I multiply it with the vector {1,0,0} for example, I get the red component (the rendered surface will become red). Why is this happening? What is "inside" that yellow connection? Is it a vector? A matrix built by different angles? Something else? How do I wrap my head around what a BRDF actually is in terms of numbers? I tried looking around but I couldn't quite find anything explaining this. If anyone has the time to explain I would be grateful 1 Quote Link to comment Share on other sites More sharing options...
fsimerey Posted December 27, 2014 Share Posted December 27, 2014 http://en.wikipedia.org/wiki/Bidirectional_reflectance_distribution_function Quote Link to comment Share on other sites More sharing options...
Skybar Posted December 28, 2014 Author Share Posted December 28, 2014 http://en.wikipedia.org/wiki/Bidirectional_reflectance_distribution_function Yes, and then I'm back at the original question. I know that Velocity is a vector, that Point Numbers is an integer, etc. I don't know what a BRDF is, and in turn I don't know how I can interact with it. Quote Link to comment Share on other sites More sharing options...
magneto Posted December 28, 2014 Share Posted December 28, 2014 I downloaded this video recently but not sure if it's what you really want: Quote Link to comment Share on other sites More sharing options...
benderonline Posted January 14, 2015 Share Posted January 14, 2015 I think what you're getting at is - what datatype is a BRDF - ie what does the yellow mean... The answer is the 'F' in the 'BRDF' - it's a mathematical function... not so much a number (int or flaot), or series of numbers (vec), or a string, it's a function - as per wikipedia "In mathematics, a function[1] is a relation between a set of inputs and a set of permissible outputs with the property that each input is related to exactly one output"... http://en.wikipedia.org/wiki/Function_%28mathematics%29 2 Quote Link to comment Share on other sites More sharing options...
Skybar Posted January 15, 2015 Author Share Posted January 15, 2015 Yes! That is the answer I was looking for! Thanks a bunch Benjamin Quote Link to comment Share on other sites More sharing options...
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