Corner Blend
Creates a blend surface between either three intersecting fillets and a base surface or between four intersection fillets.
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Access the tool from the Surfaces Palette:
Corner Blend settings
Continuity Type
G1 Tangent - Maintains tangent continuity (G1) with all four boundaries.
G2 Curvature - Maintains curvature continuity (G2) with all four boundaries.
Explicit Control
See Surface Tool Common Parameters.
3 Surface Blend Options
These options display when creating a corner blend of three surfaces and a base surface.
Base Curve Type
Sets the type of curve used for building the fourth edge of the blend.
Freeform - Builds the fourth edge using a freeform blend curve. Freeform allows you to adjust the positions of the start and end contact points along the fourth edge. In some cases, this helps you avoid obtuse or acute angles in your result. These types of deformities are often difficult to eliminate by only adjusting the Base Radius and Form Factor values provided by Fillet. This is the default setting.
Fillet - Builds the fourth edge using a curve fillet. This is the default setting. Use Base Radius and Form Factor to adjust the size and shape of the curve.
Base Blend Control
(Applies to Freeform) Choose the method for controlling the shape of the blend curve: Form Factor or Shape. These are the same parameters used by the Freeform Blend Curve.
Form Factor
Controls the form factor of the 'fourth edge' created on the base surface.
See Surface Tool Common Parameters for details on how form factor is calculated.
Shape
Use the Side A Shape/ Side B Shape attributes to adjust the shape of the blend curve.
Side A Param/ Side B Param
(Applies to Freeform) Use these controls or the arrow manipulators to set the start and end contact points of the freeform blend curve.
Lock Shape Controls
(Applies to Shape) When this option is selected, the values of Side A Shape and Side B Shape are kept the same.
Side A Shape/ Side B Shape
(Applies to Shape) Provides control over the looseness or tightness of the curve blend toward the first boundary. If the value is greater than 1.0, the result is a blend that fits tighter to the corner of the input curves. If the value is less than 1.0, the result is a rounder blend that fits closer to the edge of the first curve.
Align Base Edge
When on, the fourth edge (base surface edge) of the blend is aligned to the base surface. Turn this off to control base edge alignment independently of the three intersecting blends.
Base Radius
(Applies to Fillet) Controls the radius of the fourth edge created on the base surface.
4 Surface Blend Options
These options display when creating a corner blend of four surfaces.
Edge Shape 1/Edge Shape 2/Edge Shape 3/Edge Shape 4
Use these controls to adjust the shape of the blend's four edges.
Blending Options
U Blend/V Blend
Controls the blending between opposite edges.
Middle Edge Shape
Adjust the shape of the edge opposite the base surface. You can use this setting to correct any distortions along the edge.
Control Options
In addition to the common Control Options, Corner Blend has the following specific settings.
Base Trim Type
Specifies the trimming options on the base surface.
Trimmed Surface - Trims the base surface.
Curves on Surface – Creates curves on surface along the contact lines, allowing you to trim manually.
Corner Blend common parameters
Corner Blend has the following Surface Tool Common Parameters sections:
- Continuity
- Form Factor
- Explicit Control
- Control Options
Corner Blend workflow
The Corner Blend tool lets you create either three fillet or four fillet blends. When creating a blend of three fillets, you have several options for controlling the resulting shape. These are based on other Alias tools, such as Surface Fillet and Freeform Blend Curve.
When creating a blend of four fillets, you can control the shape of each edge.
Create a three surface blend
Select the three intersecting transition surfaces, and then click Accept.
Select the base surface, and then click Accept.
The base surface is the surface you will use to create the fourth edge of the blend.
Click Accept, and then click Accept a second time to build the blend.
The input surfaces are trimmed at their intersections and the corner surface is built.
Create a four surface blend
Note that four surface blends are only supported on natural edges of the surfaces. The side edges of the fillets cannot be trimmed, however either end of the fillet can be trimmed.
- You can select all four intersecting surfaces individually or select them all with box select.
- Click Build.
- Adjust the blend using the Edge Shape parameters.