ArcPropertySetter
Sets the properties of an arc geometry to those specified. All parameters are optional; if a value is unspecified, it is left unmodified on the geometry. This transformer works on a single feature at a time.
This transformer can also be used to create an arc by using a point as an input. The point geometry will be used as the center point for the new arc. When using this creation mode, you must supply, at minimum, the following parameters: Primary Radius, Start Angle, Sweep Angle.
Input Ports
Features with arc or point geometry.
Output Ports
Features with the properties of the arc geometry modified according to the new values provided, or the newly created arc geometry.
Invalid features will be output via this port.
Parameters
The new length of the primary radius for the ellipse upon which the arc is based.
The new length of the secondary radius for the ellipse upon which the arc is based.
The new rotation of the ellipse that defines the arc. The rotation angle specifies the angle in degrees from the horizontal axis to the primary axis in a counterclockwise direction.
The new parametric angle of the start point of the arc, in degrees.
The new parametric sweep angle of the start arc, in degrees.
The default is 360.
The new x coordinate value for the arc’s start point
The new y coordinate value for the arc’s start point
The new z coordinate value for the arc’s start point
The new x coordinate value for the arc’s end point
The new y coordinate value for the arc’s end point
The new z coordinate value for the arc’s end point
The new x coordinate of the center of the ellipse. If not specified, the first coordinate of the feature is used.
The new y coordinate of the center of the ellipse. If not specified, the first coordinate of the feature is used.
The new z coordinate of the center of the ellipse. If not specified, the first coordinate of the feature is used.
Transformer Parameter Menu
Editing transformer parameters
Editing Transformer Parameters
Using a set of menu options, transformer parameters can be assigned by referencing other elements in the workspace. More advanced functions, such as an advanced editor and an arithmetic editor, are also available in some transformers. To access a menu of these options, click beside the applicable parameter. For more information, see Transformer Parameter Menu Options.
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. There are a number of tools and shortcuts that can assist in constructing values, generally available from the dropdown context menu adjacent to the value field.
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.
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.
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.
These functions manipulate and format strings.  
Special Characters 
A set of control characters is available in the Text Editor. 
Math functions are available in both editors.  
Date/Time Functions  Date and time functions are available in the Text Editor. 
These operators are available in the Arithmetic Editor.  
These return primarily featurespecific values.  
FME and workspacespecific parameters may be used.  
Creating and Modifying User Parameters  Create your own editable parameters. 
Dialog Options  Tables
Transformers with tablestyle parameters have additional tools for populating and manipulating values.
Row Reordering

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

Cut, Copy, and Paste

Enabled once you have clicked on a row item. Choices include:
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.
FME Community
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Search for samples and information about this transformer on the FME Community.