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ACIS allows round blends, chamfer blends, and vertex
n-sided patches (Gregory Polygon surfaces).
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Radius
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The
blend radius refers to the radius of the figurative rolling ball. The blend radius may either be constant or variable. Any combination of variable radius and constant radius blends may exist in a sequence of edges to be blended, as long as they always meet one another with matching radius values.
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Cross Section
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A blend between two entities has a characteristic shape which is defined by the cross section of the blend surface. The
cross section is the shortest line along the blend surface that connects the two faces being blended. The cross section is always perpendicular to both faces in the blend.
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A circular (round) blend has a circular cross section. The cross section of a chamfer blend is a straight line.
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