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Basic Concepts of Creating Surfaces | 535
Basic Concepts of Creating Surfaces
Three-dimensional surface modeling can be compared to constructing a
building. You start by establishing the initial shape. Then you cover the
rough framing with siding and roofing.
One approach to surface modeling is to create a 3D framework of wires. Wire
is a generic term for lines, arcs, circles, ellipses, 2D and 3D polylines, aug-
mented lines, and splines, including splines created from existing part edges.
This framework is called a wireframe.
Wires and surface parts can be intermixed to construct the framework of your
3D model. This initial step in creating a surfaced model is called wireframe
modeling.
Once the 3D wireframe model is created, the next step is to cover the frame-
work with a surface. This task is called wireframe surfacing. This technique is
one approach to creating surfaces.
rough frame siding applied
line ellipse polyline
spline augmented line
circle