Question $4-$ Cyrus$-$Beck Line Clipping

$6+9=15$

A triangular clipping window is defined by the vertices $\{(-4,0),(4,0),(0,4)\},$ as shown

in the picture above. Everything inside the triangle will be kept, the rest will be

discarded

a$)$ Calculate the normals vectors for each of the edges. Please remember that the

normals should point outside the triangle and they will be unit vectors.

b$)$ Using the Cyrus$-$Beck Line Clipping Algorithm, calculate the clipping points for

the line segment that goes from $(-4,4)$ to $(3,-1).$ Show detailed calculation,

including the calculation of $t$ values, PE$/$PL grouping.