# NPTEL Computer Graphics week 3 Assignment Answers 2023

NPTEL Computer Graphics week 3 Assignment Answers 2023:- All the Answers provided below to help the students as a reference, You must submit your assignment at your own knowledge.

## NPTEL Computer Graphics Week 3 Assignment Answers 2023

1. What is the basic idea behind voxels in space partitioning methods?

A) Representing objects using a collection of 2D pixels
B) Representing objects using a collection of 3D cubes with uniform size

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2. What does BSP stand for in space partitioning methods?

A) Binary Subdivision Procedure
B) Boundary Space Partitioning
C) Binary Space Partitioning
D) Base Structure Placement

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3. What does CSG stand for, and how does it represent objects in space?

A) Constructive Shape Graphics – It uses polygonal representation for objects.
B) Constructive Solid Geometry – It relies on joining spaces using Boolean operators to represent objects.
C) Composite Scene Generation – It represents objects using point clouds.
D) Comprehensive Space Grids – It divides objects using octrees for representation.

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4. Which of the following operations is NOT a basic transformation in modeling transformations?

A) Translation (T)
B) Rotation (R)
C) Scaling (S)
D) Shearing (Sh)

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5. What is the mathematical representation of scaling for a point (x, y)?

A) (x+sx, y+sy)
B) (x∗sx, y∗sy)
C) (sx∗x, sy∗y)
D) (x/sx, y/sy)

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6. Modeling transformations transform objects from local/object coordinates to world coordinate system

A) True
B) False

`Answer :- `

7. What is the general approach to apply multiple basic transformations with respect to an arbitrary fixed point?

A) Scale, Translate, Scale back
B) Translate to origin, Perform transformation, Translate back to original position
C) Rotate, Scale, Shear
D) Translate, Rotate, Scale

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8. In which sequence should multiple geometric transformations be applied to get the correct result?

A) Right-to-left
B) Left-to-right

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9. What is the purpose of the composite matrix in 3D transformations?

A) To perform multiple shearing transformations on an object
B) To combine translation, rotation, and scaling transformations into a single matrix
C) To convert 3D points to 2D points

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10. In space partitioning, large memory is required to store voxel-grid information

A) True
B) False

`Answer :- `