Creator

Creates features using the parameters supplied, and sends them into the workspace for processing.

The Creator's interface allows you to select the desired type of geometry, then enter the coordinates and/or parameters that will create the desired object.

Configuration

Input Ports

This transformer does not have any input ports.

Output Ports

Parameters

General

Geometry Source

This parameter specifies how to create the geometry, using the options listed below. Your choice for this parameter determines whether other parameters are enabled or disabled.

Geometry Object: This option allows you to create the geometry types specified in the Geometry Object parameter below. The XML tab shows, by default, the XML representation of any object defined in the other areas of the dialog.
GeoJSON: This option allows you to create the geometry defined by a textual representation that follows the GeoJSON spec.

Geometry Object

The Geometry Creator dialog is accessed via the ellipses button.

In this dialog, a Geometry Type is selected and appropriate tabs are enabled to define the object being created:

Geometry Parameters: presents a series of parameters specific to the geometry type.
Coordinate Values: If available, accepts a number of coordinates in the form (x,y) or (x,y,z).
XML: If available, provides either a template or an XML interpretation of the current Geometry Parameters values.

3D coordinates may be toggled on to add z coordinates to the parameters.

Geometry Type

Description

Null

Creates an object without geometry. For some applications, it can be useful to have such an object available; for example, when you are using a CSV writer but you want to output a header or footer.

Point

Creates a single point at the given coordinates.

Text

Creates a single text object at the given coordinates, using the text string, height and rotation.

Line

Creates a single line object using the specified coordinate pairs. If you want to create an area, use the Polygon option instead. Even if you specify the first and last coordinate pairs to be the same, the type of the object generated will still be fme_line.

Arc by center point/

Arc by center point with ends

Arc by center point creates an arc using the specified parameters.

Arc by center point with ends: All fields are required (including start and sweep angles), except rotation. The three coordinates given must match the arcs (sweep and start angles) or else the Creator will produce an invalid feature. An optional transformation matrix can be specified.

For more information, see Arcs.

Note Not all transformers or output feature types work well with arcs. You may need an ArcStroker to simplify it.

Arc by 3 points

Creates an arc using the specified start point, mid point and end point. An optional transformation matrix can be specified. For more information, see ArcBy3Points.

Arc by bulge

Creates an arc using the specified start point, end point and bulge value. An optional transformation matrix can be specified. For more information, see ArcByBulge.

Ellipse

Creates an ellipse using the specified parameters. In order to create a circle, make sure the primary and secondary axes have the same length.

Note The ellipse generated by this is an arc feature. Not all transformers or output feature types can work with arc features, so you may need an ArcStroker to simplify it.

Box

Creates a 2D rectangle or a rectangular prism in 3D space. It is defined by a minimum corner and a maximum corner, but unlike a Rectangle Face, these two coordinates must not share identical x-, y-, or z-values.

For a 3D box, the two corner points unambiguously represent a unique rectangular prism, in which all faces are parallel to the coordinate planes. If the first point is the minimum point, then the surface normal points out from the box; otherwise, the box has been flipped inside-out and the surface normal points into the box. With conjunction of a 4×4 transformation matrix, a Box can be used to represent boxes that are not parallel to the coordinate planes. This matrix can store affine transformations.

Polygon

Creates a polygon feature. Works in the same way as the line option, but it will warn you if you forget to close the polygon.

Rectangle Face

Creates an optimized rectangular face representation that lies parallel on a coordinate plane (either xy-, xz-, or yz-plane).

This face specifies its position by using two points, the minimum corner and maximum corner. Because the face must lie parallel to a coordinate plane, the corner points share a common coordinate value. For example, if the rectangular face lies on the xy-plane, the corner points share a common z-value. The surface normal of this rectangular face depends on the order of the specification of the first and second points, as described in the following table.

Plane to which rectangle is parallel	Order of specification of (coordinates of) the corners	Direction of the surface normal
XY	Min-corner, max-corner	Positive Z-axis
YZ	Min-corner, max-corner	Positive X-axis
XZ	Min-corner, max-corner	Positive Y-axis
XY	Max-corner, min-corner	Negative Z-axis
YZ	Max-corner, min-corner	Negative X-axis
XZ	Max-corner, min-corner	Negative Y-axis

The surface normal determines the orientation of the rectangular face; that is, the direction in which the surface normal points indicates which side is the front. With conjunction of a 4×4 transformation matrix, a Rectangle Face can be used to represent rectangular faces that are not parallel to the coordinate planes. This matrix can store affine transformations.

Triangle Strip

Creates a triangle strip, which is a series of connected triangular faces.

These faces are defined by three consecutive points in a point list. The first three vertices (labeled below as v1, v2, and v3), define the first triangular face. A new triangle is formed by connecting the next point with its two immediate predecessors. That is, every additional point vi defines a new triangular face with vertices vi–2, vi–1, and vi. For example, the second triangle is defined by v2, v3, v4, the third by v3, v4, v5, etc. The following diagram illustrates a typical Triangle Strip.

The orientation of the entire triangle strip is determined by the orientation of the first triangle. If the vertices of the first triangle are ordered counterclockwise, then the front of the strip is displayed; otherwise, the back of the strip is displayed. If the triangle strip has been flipped, then the front/back of the entire strip is actually the reverse of what the first triangle indicates.

Triangle Fan

Creates a triangular fan, which is a series of connected triangular faces. The fan differs from a Triangle Strip in the way that vertices define faces.

The first three vertices (labelled below as v1, v2, and v3), define the first triangular face. A new triangle is formed by connecting the next point with its immediate predecessor and the first point of the triangle fan. That is, every additional point vi defines a new triangular face with vertices v1, vi-1, and vi. For example, the second triangle is defined by v1, v3, v4, the third by v1, v4, v5, etc. The following diagram illustrates a typical Triangle Fan.

The orientation of the entire triangle fan is determined by the order of vertices of any triangle within the fan (all the triangles are already oriented in the same direction). When they are ordered counterclockwise, the front is displayed; otherwise, the back is displayed.

Face

Creates a planar area in 3D space. The planar structure can be a polygon, an ellipse or a donut.

The orientation of a Face is determined by using the following rule: if the fingers of your right hand curl along the order of the vertices, the direction that the thumb points to is the front of the face. This thumb direction also describes the surface normal of the face, a vector that points outwards perpendicular from the area.

Curve closing method: This method controls how the curve is closed. It is applicable only if the first and last coordinates entered do not match X, Y or Z coordinate values. It ensures that the coordinates of the start and end points match so that it is a valid area.

Average: The current start and end points are each replaced by the average of the start and end points.
Extend: The start and end points are connected with no additional points.
Extend or Average: The area is closed using the Average method if – and only if – the start and end points differ by at most one of X, Y, or Z. Otherwise, the Extend method is used to close the area.

Clothoid

Creates a clothoid which are curves whose curvature changes linearly as a function of length.

A clothoid in FME is defined by start curvature, end curvature, clothoid length, start position, and start direction. To create a clothoid whose elevation is a linear function of length, start/end elevations may also be defined. An optional transformation matrix can be specified.

Custom

Creates an object based on an XML representation.

GeoJSON

Creates a geometry based on the GeoJSON spec.

Coordinate System

This parameter allows you to set the coordinate system on the specified feature. Select a coordinate system from the pull-down list, or click the Browse button to select from the Coordinate System Gallery. If you leave this parameter blank, the coordinate system will not be set on the feature(s) created by this transformer.

Number to Create

This parameter specifies how many features will be created. When more than one feature is created, the attribute specified by the Creation Instance Attribute parameter will hold each feature's creation number (starting from 0).

Create After Readers

Create After Readers determines whether the feature is created after all reader features have been processed (Yes), or whether the feature is created immediately before the first reader feature is processed (No).

Features cannot be created in the data flow before any reader reads anything, since the data flow is driven by features arriving from the reader.

In rare cases, you might want the Creator to specifically operate before other features are processed.

Editing Transformer Parameters

Transformer parameters can be set by directly entering values, using expressions, or referencing other elements in the workspace such as attribute values or user parameters. Various editors and context menus are available to assist. To see what is available, click beside the applicable parameter.

How to Set Parameter Values

Defining Values

There are several ways to define a value for use in a Transformer. The simplest is to simply type in a value or string, which can include functions of various types such as attribute references, math and string functions, and workspace parameters.

Using the Text Editor

The Text Editor provides a convenient way to construct text strings (including regular expressions) from various data sources, such as attributes, parameters, and constants, where the result is used directly inside a parameter.

Text Editor

Using the Arithmetic Editor

The Arithmetic Editor provides a convenient way to construct math expressions from various data sources, such as attributes, parameters, and feature functions, where the result is used directly inside a parameter.

Arithmetic Editor

Conditional Values

Set values depending on one or more test conditions that either pass or fail.

Parameter Condition Definition Dialog

Content

Expressions and strings can include a number of functions, characters, parameters, and more.

When setting values - whether entered directly in a parameter or constructed using one of the editors - strings and expressions containing String, Math, Date/Time or FME Feature Functions will have those functions evaluated. Therefore, the names of these functions (in the form @<function_name>) should not be used as literal string values.

Content Types

String Functions	These functions manipulate and format strings.
Special Characters	A set of control characters is available in the Text Editor.
Math Functions	Math functions are available in both editors.
Date/Time Functions	Date and time functions are available in the Text Editor.
Math Operators	These operators are available in the Arithmetic Editor.
FME Feature Functions	These return primarily feature-specific values.
FME Parameters	FME and workspace-specific parameters may be used.
Creating and Modifying User Parameters	Create your own editable parameters.

Dialog Options - Tables

Table Tools

Transformers with table-style parameters have additional tools for populating and manipulating values.

Row Reordering

Enabled once you have clicked on a row item. Choices include:

Add a row
Remove a row
Move current row up one
Move current row down one
Move current row to top
Move current row to bottom

Cut, Copy, and Paste

Enabled once you have clicked on a row item. Choices include:

Cut a row - delete and copy to clipboard
Copy a row to the clipboard
Paste a row from the clipboard

Cut, copy, and paste may be used within a transformer, or between transformers.

Filter

Start typing a string, and the matrix will only display rows matching those characters. Searches all columns. This only affects the display of attributes within the transformer - it does not alter which attributes are output.

Import

Import populates the table with a set of new attributes read from a dataset. Specific application varies between transformers.

Reset/Refresh

Generally resets the table to its initial state, and may provide additional options to remove invalid entries. Behavior varies between transformers.

Note: Not all tools are available in all transformers.

For more information, see Transformer Parameter Menu Options.

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Keywords: 2DCreator 3DCreator Creator3D