CAP 3032
Interactive Modelling & Animation I
Midterms Exam Review (Qns & Ans)
2025
1. Which of the following is a primary benefit of using inverse
kinematics (IK) in character animation?
A. Simplifies forward motion of characters
B. Makes character interaction with environments more
accurate
C. Automatically generates all keyframes in an animation
sequence
D. Reduces the computational cost of rendering models
- ANS: B. Makes character interaction with environments
more accurate
©2025
, - Rationale: IK allows precise positioning of end-effectors,
improving interactions like placing a character's hand on an
object.
2. In the context of interactive 3D modeling, UV mapping is
primarily used to:
A. Generate physics simulations
B. Define surface textures and how they wrap around models
C. Increase rendering speed by reducing polygon count
D. Animate skeletal rigs efficiently
- ANS: B. Define surface textures and how they wrap around
models
- Rationale: UV mapping provides a 2D coordinate system to
apply textures accurately to 3D models.
3. Which animation principle ensures objects in motion appear
to accelerate and decelerate naturally?
A. Squash and Stretch
B. Anticipation
C. Ease In and Ease Out
D. Timing and Spacing
- ANS: C. Ease In and Ease Out
©2025
, - Rationale: This principle adds realism by mimicking natural
motion curves.
4. Which tool in 3D animation software is most commonly used
to control joint rotation in a character rig?
A. Skin Modifier
B. Bone Constraints
C. Morph Targets
D. Keyframe Graph Editor
- ANS: B. Bone Constraints
- Rationale: Bone constraints manage joint rotation and
movement in rigged skeletons.
5. What does the term "skinning" refer to in interactive
modeling?
A. Removing unnecessary polygons from a model
B. Adjusting UV maps to fit textures properly
C. Binding a 3D mesh to a skeleton for animation
D. Generating shaders to simulate surface properties
- ANS: C. Binding a 3D mesh to a skeleton for animation
- Rationale: Skinning links the mesh to the skeleton for
deformation during animations.
©2025
, ---
Fill-in-the-Blank Questions
6. __________ is the process of creating realistic motion by
interpolating between keyframes in an animation sequence.
- ANS: Tweening
- Rationale: Tweening creates smooth transitions between
keyframes.
7. In animation, the __________ curve defines how motion or
transformation progresses over time.
- ANS: Animation Curve
- Rationale: Animation curves (e.g., Bezier curves) control
pacing and timing.
8. __________ is a method used to reduce polygon count on 3D
models while maintaining visual fidelity.
- ANS: Decimation
- Rationale: Decimation simplifies meshes, improving
performance in interactive environments.
©2025
Interactive Modelling & Animation I
Midterms Exam Review (Qns & Ans)
2025
1. Which of the following is a primary benefit of using inverse
kinematics (IK) in character animation?
A. Simplifies forward motion of characters
B. Makes character interaction with environments more
accurate
C. Automatically generates all keyframes in an animation
sequence
D. Reduces the computational cost of rendering models
- ANS: B. Makes character interaction with environments
more accurate
©2025
, - Rationale: IK allows precise positioning of end-effectors,
improving interactions like placing a character's hand on an
object.
2. In the context of interactive 3D modeling, UV mapping is
primarily used to:
A. Generate physics simulations
B. Define surface textures and how they wrap around models
C. Increase rendering speed by reducing polygon count
D. Animate skeletal rigs efficiently
- ANS: B. Define surface textures and how they wrap around
models
- Rationale: UV mapping provides a 2D coordinate system to
apply textures accurately to 3D models.
3. Which animation principle ensures objects in motion appear
to accelerate and decelerate naturally?
A. Squash and Stretch
B. Anticipation
C. Ease In and Ease Out
D. Timing and Spacing
- ANS: C. Ease In and Ease Out
©2025
, - Rationale: This principle adds realism by mimicking natural
motion curves.
4. Which tool in 3D animation software is most commonly used
to control joint rotation in a character rig?
A. Skin Modifier
B. Bone Constraints
C. Morph Targets
D. Keyframe Graph Editor
- ANS: B. Bone Constraints
- Rationale: Bone constraints manage joint rotation and
movement in rigged skeletons.
5. What does the term "skinning" refer to in interactive
modeling?
A. Removing unnecessary polygons from a model
B. Adjusting UV maps to fit textures properly
C. Binding a 3D mesh to a skeleton for animation
D. Generating shaders to simulate surface properties
- ANS: C. Binding a 3D mesh to a skeleton for animation
- Rationale: Skinning links the mesh to the skeleton for
deformation during animations.
©2025
, ---
Fill-in-the-Blank Questions
6. __________ is the process of creating realistic motion by
interpolating between keyframes in an animation sequence.
- ANS: Tweening
- Rationale: Tweening creates smooth transitions between
keyframes.
7. In animation, the __________ curve defines how motion or
transformation progresses over time.
- ANS: Animation Curve
- Rationale: Animation curves (e.g., Bezier curves) control
pacing and timing.
8. __________ is a method used to reduce polygon count on 3D
models while maintaining visual fidelity.
- ANS: Decimation
- Rationale: Decimation simplifies meshes, improving
performance in interactive environments.
©2025
