15 Questions
What is the most common logical operator used to create models by adding and subtracting shapes?
Union
What is the technique especially useful for creating 3-D objects or surfaces with holes?
Trimming
What is the special way of merging 2 surfaces by creating a new surface that extends from each of the 2 surfaces being blended?
Blending
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
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
Logical operators are used to create models by adding and subtracting shapes in a variety of ways
True
Subdivision surfaces are usually based on adaptive approximation, subdividing the surface only where the topology of the surface requires additional detail
True
Beveling is a delicate form of chamfering that truncates the hard edge between adjacent surfaces and replaces it with a slanted plane
False
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
Random distortion can also be used to animate the effect of shaking by animating the displacement of points back and forth through time
True
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
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
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
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
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
Test your knowledge of computer animation modeling techniques with this quiz covering topics such as curved lines, basic modeling utilities, free-form curved surfaces, subdivision surfaces, and logical operators. This quiz is based on the content from EIE 3101 Computer Animation Lec 03 and Isaac Kerlow's book "The art of 3D computer animation and effects, 4th ed."
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