Lecture 9: Object-Based Parametric Modeling Flashcards

1
Q

Object-based Parametric Modeling

A

Modeling technique that makes objects defined by parameters and rules set up by the designer to determine geometric and non-geometric features

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2
Q

Boundary Representations (B-rep)

A

Represented shapes as closed, oriented sets of bounded surfaces. Boolean operations (union, intersection, and subtraction) directly interact with the shape.

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3
Q

Constructive Solid Geometry (CSG)

A

Represented shapes as a set of functions that define the primitive polyhedral. Boolean operations are easy to edit.

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4
Q

B-rep vs. CSG

A

B-reps shape is the result of the sequence of operations and object arguments. CSG uses parameters & algebraic formulas defining the shape.

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5
Q

Feature-based design parameters

A

An item in the world generally has multiple subparts with different materials, multiple objects can share parameters. Connected objects behave concurrently and propagate.

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6
Q

Types of relations (3)

A
  1. Geometric (distance, angle)
  2. Descriptive (coincident, parallel)
  3. Equational (PEDMAS)
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7
Q

Design behavior

A

How a parametric model responds & adapts to changes in input parameters or objects

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8
Q

Classes

A

Template definition of the methods and variables in a particular kind of object

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9
Q

Instances

A

Specific realizations of objects.

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10
Q

Exceptional objects

A

Do now follow the standard conventions reflected in the
pre-defined classes.

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