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Command Line
The command line can be used to draw geometries or change the GUI configuration.
Command Reference
splitSurfaceByIsoparam
This option is useful when a surface needs to be split at a given isoparametric curve. This operation may be used to separate surfaces with extreme curvatures in different parts.

Welcome
Release Notes
See what's new in the latest release.
Get Started
The newFASANT User Guide contains examples with step-by-step instructions on how to get started with newFASANT.
Examples
The newFASANT User Guide contains a collection of examples that teaches you newFASANT concepts and essentials.
Utilities
The newFASANT utilities allows you to set up a remote server, use the batch utility to mesh and execute a project or upload a project to a queueing system.
GUI
An overview of the newFASANT graphical user interface is given.
Post-Process
Results can be post-processed to obtain customized results.
Antennas
A large collection of antennas are supported as well as importing radiation patterns and specifying the antenna feeding.
Materials
Materials can be defined, edited, deleted and assigned to specific surfaces or objects.
Command Line
The command line can be used to draw geometries or change the GUI configuration.
- Using the Command Line
- List of Commands Ordered by Functionality
  The next table represents an exhaustive list of the commands supported in newFASANT. These commands are ordered by the function they perform.
- Command Reference
  - analyzeCurvature
    This option is useful to identify the curves and surfaces in the geometry that describe large curvatures. Given a desired angle as reference (in degrees), if some of the selected objects describe curvatures bigger than the reference angle the points are generated where the curves has varied their direction every angular step. The detected points may be only visualized or also added to the geometry.
  - analyzeEdges
    This tool allows the user to detect the edges in the geometry. The edges may be only visualized or also added to the geometry.
  - analyzeNakedBorders
    This tool allows the user to detect the naked borders (borders of the surfaces that are not in contact with other ones) in the geometry. The borders may be only visualized or also added to the geometry.
  - angle
    This tool allows the user to calculate the angle (in degrees) between two given vectors. Vectors are specified by an initial point and an end point.
  - arc
    This command allows the user to draw a circumference arc specifying its central point, radius, initial and final angles (in degrees), in this order.
  - area
    This command returns the total area of the selected surfaces.
  - array
    Copies an object or a set of objects a given number of times in the direction of each of the axes. This option lets the user easily create a matrix of geometries.
  - arrayOnSurface
    Creates an array of planar elements along surface.
  - axis
    This option toggles the visualization of the three axes in the view area and allows to modify their length.
  - bentDipoles
    Add new "Bent dipoles" structure to the geometry.
  - booleanDifference
    This command computes the resulting surfaces of subtracting the second object to the first one (A minus B operation), that is, the regions of the first object that are not contained in the second object.
  - booleanInside
    This command select the surfaces of the first object that are contained in the second one (A inside B operation).
  - booleanIntersection
    This command creates an object with the regions of the two selected objects that are included in both of them (A AND B operation). Note that the original objects used for the operation will be deleted.
  - booleanOutside
    This command select the surfaces of the first object that are not contained in the second one (A outside B operation).
  - booleanSplit
    This command introduces the cuts that an object produces in another one.
  - booleanUnion
    This command creates a new object that encloses the regions of the two selected objects that are included in any of them (A OR B operation). Note that this command will delete the original objects.
  - booleanXOR
    This command selects the surfaces of the two selected objects that are included only in one of them (A XOR B operation).
  - box
    This command draws a box at the specified coordinates taking a square bounded by width, depth and height.
  - capacitance
    Add a new capacitance to the geometry.
  - circle
    This command draws a circle with a specified radius and center point.
  - circularHole
    Add a new plane with a circular hole in it to the geometry.
  - cone
    This command draws a closed or open cone.
  - connect2Surfaces
    Generates a new surface to join the two selected ones (if they are not in contact).
  - connectCurves
    Connects the selected curves.
  - coons
    Creates a coons patch through a selected loop of 2, 3 or 4 curves.
  - copy
    Copies an object or set of objects. The difference between this command and the array command is that the copy command copies objects by applying a displacement vector with an arbitrary direction.
  - cross
    This command draws a cross-shaped surface.
  - crossHole
    Add a new plane with a cross shaped hole in it.
  - curve
    This command creates a NURBS (Non-Uniform Rational B-Spline) curve by specifying its control points (as well as the weight of each one). Note that the number of points must be at least one more than the degree of the curve.
  - curveFunction
    This command draws a curve with three functions that define points in Cartesian coordinates.
  - curveInterpolation
    This option allows the user to draw a curve that goes through a set of points by applying polynomial interpolation.
  - cylinder
    Creates a closed or open (i.e. without taps) cylinder.
  - delete
    This command deletes an object or set of objects from the geometry. It is also possible to delete all the command history.
  - disk
    This command creates a disk by specifying its center point and the radius.
  - distance
    This option allows the user to calculate the Euclidean distance between two given points.
  - duplicate
    Creates a copy of an existing object at the same position as the original one.
  - ellipse
    This command draws an ellipse.
  - ellipsoid
    This command draws an ellipsoid in the geometry.
  - exit
    This command closes the application.
  - explode
    Divides an object into a specific number of surfaces.
  - export
    This command lets the user export the geometry contained in the current project into a file (NURBS, IGES, DXF, MSH, NAS…)
  - extendHole
    This option allows the user to trim a surface with a loop and extrude the resulting cut off part of the surface.
  - extrude
    This command creates a surface by sweeping a curve along a translation vector, or by joining all of its points to a central point.
  - extrudeNormal
    Creates a closed object by sweeping the chosen surfaces in the direction of their normal vectors. This command is a simplified version of the extrudeSurface command as the extrusion direction is set to the normal vector of the surfaces.
  - extrudeSurface
    This option allows the user to create a solid volume from a surface. The original surface is not removed from the view area after the extrusion has been performed.
  - flare
    This command creates a trapezoidal prism.
  - group
    This command groups the selected surfaces into an object.
  - help
    This command displays the help file that summarizes the parameters for the console or the selected command.
  - hexagon
    Adds a new hexagon to the geometry.
  - hyperbola
    This command creates a hyperbolic curve on the geometry.
  - hyperboloid
    This command draws a hyperboloid on the geometry.
  - import
  - interdigitalLines
    Creates a stripline interdigital filter.
  - invertNormals
    This command inverts the direction of the normal vectors of a curve, surface or solid object.
  - length
    This command returns the total length of the selected curves.
  - line
    This command generates a straight line in the geometry.
  - localTransform
    This command allows the user to transform the selected objects, which are assumed to be positioned in the default Cartesian coordinate system, to the current coordinate system (determined by the reference plane).
  - meshFromSurfaces
    This command creates a mesh from a set of surfaces.
  - meshToSurfaces
    This command converts a mesh to a set of (open) surfaces.
  - move
    This command moves an object by applying a translation vector to it.
  - ogive
    This command create a tangent ogive in the geometry.
  - openRing
    Add a new open ring to the geometry.
  - parabola
    This command draws a parabola.
  - paraboloid
    This command creates a paraboloid in the geometry.
  - perpendicular
    This command generates a straight line in the geometry perpendicular to the selected object that cross the introduced point.
  - pipe
    This command create a circular cross-section tube that surrounds the selected curve with the specified radius.
  - planarSurface
    This option allows the generation of planar surfaces from multiple coplanar lines.
  - plane
    This command creates a plane in the geometry.
  - point
    This command defines a point in the geometry.
  - pointCloud
    This command allows the user to create several points on the geometry.
  - pointsFromCurve
    The user can draw several points along a selected curve. The points are generated along a curve as a result of its division in several subcurves (the curve is not split) of identical size.
  - pointsFromCurveByDistance
    The user can draw several points along a selected curve. The points are generated along a curve when the desired length of a subcurve (the input curve is not split) is reached.
  - pointsFromSurface
    The user can draw several points along the two parametric dimensions of a selected surface.
  - polygon
    This command draws a polygon in the geometry.
  - project
    This command projects points and curves onto surfaces or objects. The original points and curves are not modified.
  - rebuildCurve
    This option allows rebuilding any given curve by sampling and interpolating the resulting points.
  - rebuildSurface
    This option allows rebuilding any given surface by sampling and interpolating the resulting points.
  - rectangle
    This command draws a rectangle in the geometry.
  - rectangularHole
    Adds new hole rectangle in geometry.
  - rename
    This command renames an object to a given new name
  - revolve
    This command creates a surface by revolving a curve around a rotational axis.
  - rhomboid
    This command draws a rhomboid in the geometry.
  - ring
    Adds new ring in geometry panel.
  - rotate
    This command rotates an object a given number of degrees around a specified axis.
  - scale
    This command scales the size of an object or objects by a factor specified by the user.
  - scale1D
    This command scales only the specified dimension (X, Y, Z) of an object or objects by the factor specified by the user.
  - scale2D
    This command scales only the two specified dimensions (X, Y, Z) of an object or objects by the same factor specified by the user.
  - scale3D
    This command scales the three dimensions (X, Y, Z) of an object or objects by the same factor specified by the user.
  - scaleNonUniform
    This command scales the three dimensions (X, Y, Z) of an object or objects by the three different scale factors for each dimension specified by the user.
  - script
    This command loads and executes a script or saves the history to script.
  - segment
    This command draws a straight segment in the geometry.
  - semicircle
    This command draws a semicircle in the geometry.
  - set
    This command allows visualizing and/or changing the value of a parameter.
  - skinned
    This command creates a surface by interpolating it through several curves.
  - sphere
    This command creates a new sphere in the geometry.
  - spiral
    Create a spiral curve with a given center, radius and number of turns.
  - spiralCross
    Adds a new spiral cross to the geometry.
  - splitByProjection
    This command projects curves onto surfaces or objects and split them with the resulting projections. The projected curves are only used to split the target surfaces and they are not included to the geometry.
  - splitCurves
    Split operation applied to curves.
  - splitRing
    Add a new split ring to geometry.
  - splitSurfaceByIsoparam
    This option is useful when a surface needs to be split at a given isoparametric curve. This operation may be used to separate surfaces with extreme curvatures in different parts.
  - splitSurfaceByIsoparamGrid
    This option is useful when a surface needs to be split at a given grid of isoparametric curves. This operation may be used to separate surfaces with extreme curvatures in different parts.
  - splitSurfaces
    Split operation on surfaces.
  - stripCross
    Adds new strip cross in geometry.
  - stripHexagon
    Adds new strip hexagon in geometry.
  - stripTrifilar
    Add a new hollow trifilar surface to the geometry.
  - surface
    This command allows the user to create a NURBS (Non-Uniform Rational Basis Spline) surface specifying its control points.
  - surfaceCornerPoints
    This command allows drawing a surface that is bound by the corner points specified by the user.
  - surfaceEdges
    This command creates the curves that delimit a surface.
  - surfaceEllipse
    Adds a new ellipse to the geometry.
  - surfaceFromEdges
  - surfaceFunction
    This option creates a surface by defining two parameters and three functions.
  - surfaceInterpolation
    This command allows drawing a surface that goes through a set of points specified by the user.
  - surfaceIsoparamCurve
    Any isoparametric curve of a surface (in the U- or V-dimension) may be obtained by using this command.
  - surfaceSpiral
    Create a spiral surface with a given width, radius and number of turns.
  - sweep
    Interpolate a surface through the curves chosen by the user.
  - symmetric
    This command creates an object that is symmetric to the original one with respect to a plane of symmetry.
  - tangent
    This command generates a straight line in the geometry tangent to the selected curve that cross the introduced point.
  - tCross
    Adds a new T cross (a cross with T-shaped ends) to the geometry.
  - threeDipoles
    Add three dipoles to geometry.
  - threeDipolesUnion
    Add three joined dipoles to geometry.
  - torus
    Adds a new torus to the geometry panel, receiving the central point, the minor (inner) radius and the major (outer) radius of the torus.
  - trifilar
    Add a new trifilar to the geometry.
  - trim
    This command allows the user to trim a surface using a curve or set of curves.
  - unset
    Deletes already existing parameters.
  - untrim
    This command removes cutting loops of the selected surfaces.
- Appendix I: List of Functions
GTD
GTD can be used for 3D analysis of on board antennas and coverage parameters for radiocommunications systems.
PO
PO is used for radar cross section analysis of electrically large and complex targets using physical optics (PO).
GTD-PO
GTD-PO combines the GTD and PO high-frequency techniques for the RCS analysis of complex bodies as well as antenna and radio propagation in large urban environments.
MONCROS
MONCROS is used for 3D radar cross section (RCS) using the method of moments (MOM) technique.
MOM
MOM is used for the 3D analysis of complex antennas, on board antennas, electromagnetic compatibility and radar cross section (RCS).
Periodical Structures
Periodical structures is used for the analysis and design of reflection and transmission coefficients in periodical structures and metamaterials.
Parabolic Equation
PE is used for the analysis of radio-wave propagation over land and sea for medium and large distances.
Ultrasound
Ultrasound is used for the 3D analysis of ultrasound emitting sources and time delay response simulation.
List of Acronyms and Abbreviations
View the list of commonly used acronyms in newFASANT.

splitSurfaceByIsoparam

This option is useful when a surface needs to be split at a given isoparametric curve. This operation may be used to separate surfaces with extreme curvatures in different parts.

Inline mode usage

splitSurfaceByIsoparam -h: Displays the help file that summarizes the parameters for this command.
splitSurfaceByIsoparam–s <surface> -p <parametric_value>: Splits a selected surface by an isoparametric line in the u-dimension
splitSurfaceByIsoparam–u –s <surface> -p <parametric_value>: Splits a selected surface by an isoparametric line in the u-dimension
splitSurfaceByIsoparam–v –s <surface> -p <parametric_value>: Splits a selected surface by an isoparametric line in the v-dimension

Interactive mode usage

Invocation

splitSurfaceByIsoparam

Parameters

Selected surface.
Parametric value.

Example

A curve surface are necessary for this example.

>splitSurfaceByIsoparam

Select one surface to be split on screen (Press enter when done):

Tip v to change the dimension or insert the parametric value of u(0,1): 0.25

Result:

Figure 1. Split surface on u-dimension