CS118 Pop Quiz/Midterm Practice

Vanishing points is a result of

Projective Transformation

The inverse of a scaling transformation given by S(2, 3, 4) is

S(½, ⅓, ¼)

Triangles are considered as primitives for representing 3D scenes because

• They are the smallest 3D entity through which a plane must pass

• They provide unique interpolation coefficients

The inverse of transformation T = ABC is given by

C^{-1}B^{-1}A^{-1}

Consider a point which gets transformed by a rotation R and a translation T. Would we get the same answer irrespective of the order in which R and T are applied?

No

Which of the following problems cause fatigue in VR headsets?

Vergence-Accomodation Problem

Which of the following transformations are involved in the view transformation?

Translation

Rotation

Which of the following transformations are involved in the projective transformation?

Translation

Scaling

Shear

Projective Transformation

Which of the following transformations are involved in the viewport or window transformation?

Translation

Scaling

The shape of the view frustum is akin to a

Truncated Cone

Ambient Illumination approximates

Indirect Illumination

Which component of the Phong illumination model is view dependent?

Specular

Which component of the Phong Illumination model depends on the surface normals?

Diffused

Phong shading interpolates

Normals

Depth buffer is used for

Resolving occlusion

Rasterization is a process that

Finds the fragments in a triangle

Interpolates vertex attributes

Which of the following transformations are involved in accounting for the moving gaze in the projective transformation?

Shear

Which of the following transformations are involved changing the different view orientations?

Rotation

Which of the following transformations are involved in changing the view frustum from a truncated cone to a cuboid?

Translation

Scaling

The view frustum is defined by how many planes?

6

The diffused illumination model depends on which of the following?

Surface Normals

Light Direction

The specular illumination model depends on which of the following?

Light Direction

Viewer Direction

Gouraud shading interpolates

Color

When converting from 3D to 2D in projective transformation, the depth value is still retained. This is used for

Occlusion Removal

A triangle that intersects the view frustum boundary planes will be ____
The method to handle these triangles is called before converting them to fragments is called

Intersecting the viewport boundaries

clipping