Understanding the following key terms will help as you begin using Part Builder.
- constraint
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Controls the shape of a feature by establishing relationships between features in the model.
- degree of freedom
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In part modeling, determines how a geometric object, such as a line, arc, or circle, can change shape or size. For example, a circle has two degrees of freedom: center and radius. When these values are fixed, degrees of freedom are said to be eliminated.
- dimension
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Controls the size of a feature. When changed, the feature is resized. May be expressed as a constant value, a value as part of a table, a calculated value, or a list of values.
- domain
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Refers to the part category. There are only two domain types by default: pipes and structures. Each domain type has a unique behavior in Autodesk Civil 3D.
- feature
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A building block of a pipe network part model. You combine features to create pipe network part models.
- model
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The part shape representing all possible sizes, and defined by parameters, geometry, dimensions, and geometric constraints.
- parametric
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A solution method that uses the values of part parameters to dynamically size the part.
- part size
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A specific set of values applied to the parametric model to define a single size.
- work plane
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An infinite plane related to one or more features of the model. Work planes provide a defined place in space from which to build the model.