Analyze problems with a curve network

Displays information about the network, allows inspection of curve segments and sculpt curves, and recommends fixes for problems with continuity.

Show network information

Choose CrvNet Tools > Analyze Network.
The Analyze network tool displays information about components of the current curve network.
Press and hold on a curve segment or sculpt curve to show more information, including a recommendation on how to edit the network if continuity could not be achieved.

Analysis

The Analyze network tool labels the curve network with the following information:

Network component	Indicated by
Intersections	Red dots
Continuity type for each curve segment	Label at the midpoint of the curve segment (Pos or Tan).
Curve segments with at least one adjacent surface	White lines
Curve segments with no adjacent surfaces	Green lines
Sculpt curves	Red lines
Pinned curve segments	Pin icon

Note

If the tool fails to build a surface in a valid closed region of the network, the edges are displayed in red. When this happens, query the edge (see below) to obtain more information about the probable cause of the failure.

The Analyze network tool also lets you select curve segments and sculpt curves to get specific information:

Information	Description
Curve Type	Network or Sculpt.
Region of Influence(for sculpt curves)	Large, Medium, or Small.
Nature	Pinned or Free.Whether or not the surface is pinned to the curve segment.
Edge Type	Interior: the curve segment is inside the network (the surfaces are on both sides of the segment).Boundary: the curve segment is on the edge of the network (the surfaces are only on one side of the segment).Orphan: the curve segment is not connected to any surface at all.
Continuity	Achieved or Not achieved.If continuity was not achieved, the Analyze network tool will give a recommended action.
Recommended Action(for curve segments where continuity was not achieved)	A recommendation for how to modify the network so that the curve network can achieve the requested continuity.

If the curve network could not achieve the requested continuity at a particular curve segment, the Analyze network tool will recommend a course of action to fix the problem and achieve the requested level of continuity:

Note

The Recommended Action is only an educated guess. In many cases it is impossible to pinpoint the exact reason why continuity could not be achieved.

“Recommended Action”	Possible Cause	Suggestions
End point(s) belong to degenerate surface(s)	One or more of the surfaces meeting at one of the intersections that define the curve segment is a degenerate surface.	The intersection causing the problem is indicated with an arrow.Try to redefine the network with curves that do not require degenerate surfaces.
Check network topology at end point(s)	One of the intersections that defines the curve segment may be part of a region with more than four sides.	The intersection causing the problem is indicated with an arrow.Try to redefine the network with curves that do not require non-rectangular surfaces.
Conflicting surfaces incident at endpoint(s)	There may be a conflict between the normals or curvatures of the surfaces (outside the network) which meet at this intersection.	The intersection causing the problem is indicated with an arrow.Check the alignment of the surfaces at the endpoint of the curve segment, and reshape to provide required continuity.
Problem curve at endpoint(s)	One or both of the curves intersecting this curve segment do not have sufficient curvature quality.	The intersection causing the problem is indicated with an arrow.Use the Curve curvature measurement tool to check the curvature of the intersecting curves.
Align curves at edge end(s)	The curves intersecting this curve segment are badly misaligned.	Check the alignment of both pairs of curve segments.
Smooth curve incident at ends	One or both of the curves intersecting this curve segment have some kind of quality problem.	Turn on display of edit points and look for bunched up edit points on the intersecting curves.Use the Curve curvature measurement tool to check the curvature of the intersecting curves.Use the Smooth tool to smooth the intersecting curves.
Check edge curve for problems	The curves that this curve segment belongs to has some kind of quality problem.	Turn on display of edit points and look for bunched up edit points.Use the Curve curvature measurement tool to check the curve’s curvature.Use the Smooth tool to smooth the curve.
Check knot spacing on edge curve	The curve that this curve segment belongs to may have “bunched up” edit points or multi-knots.	Edit or rebuild the curve to spread out the edit points.
Simplify triangle curves	The curves defining a triangular region are too complex.	Use the Rebuild curve tool to reduce the number of edit points in the curves.Use the smooth tool to remove sharp bends in the curves.