Constructing Ray Through a Pixel

• 2D Example

d

Q

towards

P0

right

right = towards x up

Q = frustum half-angle

d = distance to view plane

P

P = P1 + (i/width + 0.5) * 2*d*tan (Q)*right

V = (P - P0) / ||P - P0 ||

V

Ray: P = P0 + tV

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