Ray tracing

Question 1

Define Ray tracing

Answer 1

It is a technique for generating an image by tracing the
path of the light in an image plane and simulating the
effects of the encounters.

Question 2

Each picture is determined by what

Answer 2

Ray intersection

Question 3

If the ray intersects any objects in the scene

it is noted as

Answer 3

Hit Time

Question 4

When all the objects have been tested the
___________ Hit Time is noted and that’s the
the closest object to the user view

Answer 4

smallest

Question 5

give the algorithm of ray tracing

Answer 5

for every pixel
     construct a ray from the eye
       from every object in the scene
        find intersection of the ray 
         keep if closest

Question 6

when the minimum time is infinity what is the pixel color or

else

Answer 6

pixel color=Background color
or else
pixel color=color of the object along the ray

Question 7

what are the parameters of the position of the object?

Answer 7

t near

t far

Question 8

Ray tracing in a sphere

Answer 8

D<0 no intersection
D>0 two solutions enter and exit
D=0 one solution ray grazes sphere