For each curve, select the
point from which you want the path of the boundary surface to travel.
The Boundary Surface PropertyManager appears when you create a boundary surface.
Curves. Determines the curves used to create the boundary surface in this direction. Select sketch curves, faces, or edges to connect. Boundary surfaces are created based on the order of curve selection.
For each curve, select the
point from which you want the path of the boundary surface to travel.
If the boundary surface connectors are incorrect, right-click in the graphics area and select Flip Connectors to try to fix them.
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Incorrect connectors |
Flip Connectors applied |
Move Up 
and Move
Down 
. Adjusts the order of the curves. Select
a Curve and adjust the order.
If the preview shows an undesirable
boundary surface, re-select or reorder the sketches to connect different
points on the curves.
Dir1 curves influence (Available when you select curves in Direction 1 and Direction 2)
Global.
Extends the curve influence to the entire boundary surface. 
Example of Global option using
loft guide curves.
To Next Curve. Extends the curve influence to the next curve only.
To Next Sharp. Extends the curve influence to the next sharp only. A sharp is a hard corner of the profile; any two contiguous sketch entities that do not have a tangent or equal curvature relation with each other.
To Next Edge. Extends the curve influence to the next edge only.
Tangent Influence.
Extends the influence of the tangency to the next curve. This is useful
for very rounded shapes.
Tangent Type
Default
(Available when you have a minimum of three curves in the direction).
Approximates a parabola scribed between the first and last profiles.
Example using lofts. The tangency from this parabola drives the lofted
surface, which results in a more predictable and natural lofted surface
when matching conditions are not specified.
None. No tangency constraint (zero curvature) is applied.
Normal to Profile. (Available when the curves are not attaching a boundary surface to existing geometry). Applies a tangency constraint normal to the curve. Set the Draft angle and Start or End Tangent Length.
Direction
Vector. Applies a tangency constraint based on a selected entity
used as a direction vector. Select a Direction
Vector 
, then set the Draft
angle and Tangent Length.
Tangency to Face (Available when attaching a boundary surface to existing geometry). Makes the adjacent faces tangent at the selected curve. Set the Tangent Length.
Curvature to Face (Available when attaching a boundary surface to existing geometry). Applies a smooth, visually appealing curvature continuous surface at the selected curve. Set the Tangent Length.
Alignment.
(Available only for single-directional cases). Controls alignment of the
iso parameters, which control the flow of the surface.
Direction Vector (Available with Direction Vector selected for Tangent Type). Applies a tangency constraint based on a selected entity used as a direction vector. The boundary surface is tangent to the selected linear edge or axis, or to the normal of a selected face or plane. You can also select a pair of vertices to set the direction vector.
Draft
Angle. Applies a draft angle to the start or end curve. If necessary,
click Reverse Direction 
. For single-direction boundary surfaces, draft angle is available
for all Tangent Types. For bi-directional
boundary surfaces, if you connect to an existing entity that has draft,
Draft Angle is not available because
the system automatically applies the same draft to the boundary surface
at the intersecting curve.
Tangent Length.
(Not available with None selected
for Tangent Type for any curve).
Controls the amount of influence on the boundary surface. The effect of
tangent length is limited up to the next section. If necessary, click
Reverse Tangent Direction 
.
Apply to all.
(Available only for single-directional cases) Displays one handle that
controls all the constraints for the entire profile. Clear this option
to display multiple handles that permit individual segment control. Drag
the handles to modify the tangent length.
Example of Apply to all using
lofts.
Same options as Direction 1 above. The two directions are interchangeable and give the same results regardless of whether you select the curves as Direction 1 or Direction 2.
Merge tangent faces. Causes the surfaces in the resulting boundary surface to be tangent if the corresponding segments are tangent.
Close Surface. Creates a closed body along the boundary surface direction. This connects the last sketch and the first sketch automatically.
Trim by direction
1 and direction 2. Trims
surfaces by direction when curves do not form a closed boundary.
Drag Sketch.
Enables drag mode. When editing the boundary surface feature, you can
drag any 3D sketch segments, points, or planes from the 3D sketch from
which contours have been defined for the boundary surface. The 3D sketch
updates as you drag. You can also edit the 3D sketch to dimension the
contours using dimensioning tools. The boundary surface preview updates
when the drag ends or when you edit the 3D sketch dimensions. To exit
drag mode, click Drag
Sketch again or another selection list in the PropertyManager.
Video using loft feature.
You can have a maximum of
one 3D sketch in the boundary surface feature to activate Drag
Sketch mode.
Undo sketch drag
. Undoes the previous sketch drag and returns the preview
to its previous state. You can undo multiple drags and dimension edits.
Show preview. Displays shaded previews of the boundary surface. Clear this option to view the curves only.
Mesh preview
Mesh density. Adjusts the number of lines of the mesh.
Curvature combs. Select at least one of these options:
Direction 1. Toggle the display of curvature combs along Direction 1.
Direction 2. Toggle the display of curvature combs along Direction 2.
Scale. Adjusts the size of the curvature combs.
Density. Adjusts the number of lines of the curvature combs display.
