Although “Loose” might be helpful in certain situations (i.e.
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When possible explode multi-segment splines to obtain single-segment splines.Please favour single segment splines with more points rather than splines featuring multiple segments with less points. Avoid using splines with multiple segments.Keep the curves as simple as possible to avoid awkward point distribution in the final mesh.Cleanup: Enables curve clean-up to remove redundant points found within the specified tolerance.“Uniform” mode samples the curve applying a constant step. “Natural” mode samples the curve based on its slope variation. Sampling: Sampling mode used to sample curve to define point positions.Link: Link to the n-th input curve (disabled if children pinned under the generator).Flip Normals: Invert mesh normals for coherent mesh connections.Junction Tol.: Junction check tolerance value (used also to auto-flip curves’ direction).“Loose” mode permits the mesh to be created even if the four curves don’t match at ending points (“Junction Tolerance” is ignored).
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“Tight” mode forces the ending points of the curves to meet with the tolerance specified by the “Junction Tolerance” (see below).
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To adapt to user’s individual workflow the Coons Mesh generator can operate using the standard approach pinning input curves as generator’s children or to populate the proper curve’s link in the Attribute Manager. Usually found in CAD software, Coons Mesh is based on the Coons surface definition ( Wikipedia) which requires four curves to meet at their reciprocal end points and defining the mesh vertex positions by bi-linearly interpolating the discrete positions across the curves. The Coons Mesh generator provides the user with a simple yet effective tool to enable free-form mesh development by defining the four side-curves enclosing a region in space.