Some articles on photon map, photons, photon:
... To avoid emitting unneeded photons, the initial direction of the outgoing photons is often constrained ... Instead of simply sending out photons in random directions, they are sent in the direction of a known object that is a desired photon manipulator to ... that can be made to the algorithm for example, choosing the number of photons to send, and where and in what pattern to send them ...
Famous quotes containing the word map:
“When I had mapped the pond ... I laid a rule on the map lengthwise, and then breadthwise, and found, to my surprise, that the line of greatest length intersected the line of greatest breadth exactly at the point of greatest depth.”
—Henry David Thoreau (18171862)