Merging several sequential control points of the single spline will produce single control point instead of selected. Welding a start and tail point of the same spline will "close" the spline into looped curve.
Weld - merges selected control points (points from different splines can be welded to create a merged/linked control point). Will detach it's merged points from other splines. Detach - can be applied to spline on nodes level. Mirror, Move, Rotate, Scale - each tool does what it supposes to do. Insert - when applied on manipulators level, creates a spline point under cursor in a given spline. Delete - deletes spline or spline control point. When splines head or end-point is merged to another spline, using a break tool on this point can detach spline, so it's no longer linked with merged point to any other spline (to say, "Detach" tool does the same). When breaking non-closed spline chain, a new spline is created at break point. You can break the closed (looped) spline so it will have an accessible start and end-point. Break - breaks up spline at a given control point. The following tools can deal with splines and perform specific tasks when applied to spline or spline control point:Īttach - merges joined spline into one spline when applied on nodes level (splines should have a shared point already) merges splines into single spline when applied on manipulators level (a sort of "connect" operation is performed when one point is bridged/connected to another point with new spline segment) - no shared point required to attach this way. Drawing spline direction arrow can be configured in settings menu. Per-spline color assignment can be configured in settings menu (and color is set in spline properties). Spline and manipulators colors customization via settings menu. User-defined options can be set on spline and/or any control point. Three types of control points (affects incoming and outgoing spline segment): corner, bezier and bezier-corner. 
Per-point segmentation (detalization) or automatic detalization. Shared (linked) control point positions between different splines. Splines and their control point have the following features (some should be configured in options): 
Splines were restored and now available in ZModeler3.
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