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Merging Surfaces

Merging a quilt is required for operations such as creating solids from quilts.
• Colors:
– Orange = one-sided edges.
– Purple = two-sided edges.
• Merge makes one-sided edges two-sided.
• Merge options:
– Intersect
– Join

Merging Surfaces 2
Figure 2 – Surfaces Edge Display of Separate Quilts Merging Surfaces

Merging Surfaces 1
Figure 1 – Surface Merge Keep Options

Merging Surfaces 3
Figure 3 – Surface Edge Display of Merged Quilts
You can merge two or more intersecting or adjacent quilts. Merging a quilt makes it selectable as a single entity for other operations, and is required for operations such as creating solids from quilts.
Remember the following:
• Surfaces are shown using orange and purple highlighting on the edges.
• Orange denotes outer or one-sided edges.
• Purple denotes inner or two-sided edges because they border two surface patches.
Therefore:
• Merging a surface results in the creation of two-sided edges from one-sided edges. In Figure 2, the adjacent quilt surface edges are separate,
one-sided edges, as they display in orange. In Figure 3, the quilts have been merged to form two-sided, purple edges.
• Merged surface edges appear in purple.
Merge Options
There are two types of merge operations, used for different surface geometry:
• Intersect – Primarily used for intersecting quilts, when a trimming effect is desired, although it can be used on adjacent quilts. The Intersect option provides up to two flip arrows, enabling four possible geometry outcomes, as shown in Figure 1. Intersect is the default merge option.
• Join – Recommended for use on adjacent quilts. Join can also be used to join surfaces when no trimming effect is desired. For example, you could join two surfaces that meet in a “T,” without having to decide which sides to keep

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