EIE3101 Lec3 Modeling 2

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What is the most common logical operator used to create models by adding and subtracting shapes?

Union (correct)

Intersection

Complement

Difference

What is the technique especially useful for creating 3-D objects or surfaces with holes?

Merging

Subdivision

Fitting

Trimming (correct)

What is the special way of merging 2 surfaces by creating a new surface that extends from each of the 2 surfaces being blended?

Merging

Fusing

Blending (correct)

Combining

What is the technique of deformation with splines and patches consists of using a spline or a patch as the agent that deforms the object that is associated with them?

Deformation Signup and view all the answers

What is the technique especially useful for creating models of terrains that have so many irregularities that it would be difficult to model them with other techniques?

Random distortion Signup and view all the answers

Logical operators are used to create models by adding and subtracting shapes in a variety of ways

True Signup and view all the answers

Subdivision surfaces are usually based on adaptive approximation, subdividing the surface only where the topology of the surface requires additional detail

True Signup and view all the answers

Beveling is a delicate form of chamfering that truncates the hard edge between adjacent surfaces and replaces it with a slanted plane

False Signup and view all the answers

Purging utilities are used for automatically eliminating excessive vertices in complex 3-D models by identifying pairs of points that are too close to each other and deleting one of them

True Signup and view all the answers

Random distortion can also be used to animate the effect of shaking by animating the displacement of points back and forth through time

True Signup and view all the answers

Match the 3-D modeling technique with its description:

Merging patches = Yields detailed models with subtle shapes Fitting curved surfaces to polygons = Converts polygonal information into curved surfaces Subdivision surfaces = Based on adaptive approximation, subdividing the surface only where the topology of the surface requires additional detail Logical operators = Used to create models by adding and subtracting shapes in a variety of ways Signup and view all the answers

Match the 3-D modeling utility with its function:

Beveling (3ds Max: Chamfer) = Customizes the edge between adjacent surfaces with a variety of beveling techniques Rounding (3ds Max: Fillet) = Delicately rounds the straight edges or points of an object Blending = Merges 2 surfaces by creating a new surface that extends from each of the 2 surfaces being blended Purging Points (3ds Max: vertex weld) = Automatically eliminates excessive vertices in complex 3-D models by identifying pairs of points that are too close to each other and deleting one of them Signup and view all the answers

Match the 3-D modeling technique with its application:

3D Scanning Demonstration = Captures physical models and maquettes in the form of polygonal meshes Trimmed Surfaces = Refers to the difference logical operator and surfaces created with it Advanced Modeling Utilities = Includes techniques for deformation with splines and patches, and random distortion for irregular terrains Randomized Surfaces = Involves the technique of deformation with splines and patches, and random distortion to create irregular terrains Signup and view all the answers

Match the 3-D modeling technique with its subdivision process:

Curved Patches = Merging patches Fitting Curved Surfaces to Polygons = Splitting each surface into 4 facets and repositioning the vertices by local weight point averaging Subdivision Surfaces = There are many ways to go about subdividing a surface: interpolation, averaging, approximation, and insertion of new points Logical Operators = Involves union, intersection, and difference operations Signup and view all the answers

Match the 3-D modeling utility with its control method:

Beveling (3ds Max: Chamfer) = Controls the amount of beveling with a distance radius or angle value Rounding (3ds Max: Fillet) = Controls the degree of rounding with the number of segments or facets used to define the smooth transition between adjacent surfaces Blending = Controls the smoothness of blending with a function curve or by manipulating the control points of the blended surface Purging Points (3ds Max: vertex weld) = Used in conjunction with manual point-editing to fine-tune and adjust the distribution of points in the model Signup and view all the answers

EIE3101 Lec3 Modeling 2

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Questions and Answers

What is the most common logical operator used to create models by adding and subtracting shapes?

What is the technique especially useful for creating 3-D objects or surfaces with holes?

What is the special way of merging 2 surfaces by creating a new surface that extends from each of the 2 surfaces being blended?

What is the technique of deformation with splines and patches consists of using a spline or a patch as the agent that deforms the object that is associated with them?

What is the technique especially useful for creating models of terrains that have so many irregularities that it would be difficult to model them with other techniques?

Logical operators are used to create models by adding and subtracting shapes in a variety of ways

Subdivision surfaces are usually based on adaptive approximation, subdividing the surface only where the topology of the surface requires additional detail

Beveling is a delicate form of chamfering that truncates the hard edge between adjacent surfaces and replaces it with a slanted plane

Purging utilities are used for automatically eliminating excessive vertices in complex 3-D models by identifying pairs of points that are too close to each other and deleting one of them

Random distortion can also be used to animate the effect of shaking by animating the displacement of points back and forth through time

Match the 3-D modeling technique with its description:

Match the 3-D modeling utility with its function:

Match the 3-D modeling technique with its application:

Match the 3-D modeling technique with its subdivision process:

Match the 3-D modeling utility with its control method:

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