VMTKFLOWEXTENSIONS(1)

✨ NAME ✨

vmtkflowextensions — it's the vmtk script, bestie, and the script is literally also called vmtkflowextensions. Iconic name, no notes. 💅

🩷 DESCRIPTION 🩷

okay so here's the tea ☕ — vmtkflowextensions handles the automatic piping for you (yes, automatic, we love a self-sufficient queen 👑), and it does all the parsing of options for vmtkflowextensions on its own. No cap.

vmtkflowextensions interactively adds flow extensions to a surface for the purpose of CFD processing. That's the whole vibe. 🦋

🎀 Input arguments 🎀

Every single one of these, in order, no skipping, because skipping is not the move:

• -id Id (str,1); default=0 — the script id. yes she has a name tag. 🏷️
• -handle Self (self,1) — a handle to self. self-love!! 🫶
• -disabled Disabled (bool,1); default=0 — turns off execution and piping. like a do-not-disturb button but for the whole script. 💤
• -i Surface (vtkPolyData,1) — the surface.
• -ifile SurfaceInputFileName (str,1) — the filename for the default Surface reader.
• -centerlines Centerlines (vtkPolyData,1) — the centerlines. 💜
• -centerlinesfile CenterlinesInputFileName (str,1) — the filename for the default Centerlines reader.
• -extensionmode ExtensionMode (str,1) in ['centerlinedirection', 'boundarynormal']; default=centerlinedirection — the method for computing the normal for the extension. pick your fighter: centerlinedirection or boundarynormal. default is centerlinedirection. ✨
• -interpolationmode InterpolationMode (str,1) in ['linear', 'thinplatespline']; default=thinplatespline — the method for computing interpolation from the model section to a circular section. your options are linear or thinplatespline, and the default is thinplatespline. 🌸
• -sigma Sigma (float,1) >= 0.0; default=1.0 — thin plate spline stiffness. gotta be >= 0.0. 🌈
• -adaptivelength AdaptiveExtensionLength (bool,1); default=0 — adaptive extension length, off by default.
• -adaptiveradius AdaptiveExtensionRadius (bool,1); default=1 — adaptive extension radius, and this one is on by default. main character behavior. 👑
• -adaptivepoints AdaptiveNumberOfBoundaryPoints (bool,1); default=0 — adaptive number of boundary points, off by default.
• -extensionlength ExtensionLength (float,1) >= 0.0; default=1.0 — extension length. >= 0.0, fr fr.
• -extensionratio ExtensionRatio (float,1) >= 0.0; default=10.0 — extension ratio. also >= 0.0.
• -extensionradius ExtensionRadius (float,1) >= 0.0; default=1.0 — extension radius. yes, >= 0.0 again.
• -transitionratio TransitionRatio (float,1) >= 0.0; default=0.25 — transition ratio. still >= 0.0.
• -boundarypoints TargetNumberOfBoundaryPoints (int,1) >= 0; default=50 — target number of boundary points. note: it's an int and it's >= 0, so no half points, sorry. 💀
• -interactive Interactive (bool,1); default=1 — interactive mode, ON by default because we're social. 🦋
• -exclude Exclude (bool,1); default=0 — create extensions for all boundaries except those selected. sneaky but useful. 🙈
• -renderer vmtkRenderer (vmtkRenderer,1) — an external renderer.
• -normalestimationratio CenterlineNormalEstimationDistanceRatio (float,1) >= 0.0; default=1.0 — centerline normal estimation distance ratio. >= 0.0, always.
• -ofile SurfaceOutputFileName (str,1) — the filename for the default Surface writer. 📝

💖 Output arguments 💖

what you get back, babes:

• -id Id (str,1); default=0 — the script id again (she contains multitudes).
• -handle Self (self,1) — handle to self again. consistency queen. 🫶
• -o Surface (vtkPolyData,1) — the output surface.
• -centerlines Centerlines (vtkPolyData,1) — the centerlines, comin' back around. 💜

ngl the -id and -handle show up in both the input and the output lists — that's not a typo from me, that's just how it is. girlies double-dip. 💅

vmtkflowextensions version 1.5, dated April 2026 — so she's fresh, she's current, she's serving. ate and left no crumbs. 💖

✨ mwah, go extend some flow bestie ✨