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2 votes
1 answer
635 views

Vector Math for Raytracer

So i am working through the book "Raytracing in one weekend". At the point where i am at we want to check if a ray hits a sphere. For that we have the equation: ...
2 votes
2 answers
815 views

Can somebody explain this Ray Tracing Function?

I am currently reading through Peter Shirley's Ray Tracing in One Weekend. In the beginning chapters where the author introduces diffuse surfaces we a presented with this function: ...
8 votes
2 answers
2k views

Ray tracing with thin lens camera

I'm reading Cook's paper "Stochastic Sampling and Distributed Ray Tracing", I don't understand how the rays are generated. He says: Determine the focal point by constructing a ray from the eye ...