MeshSimplifier
Reduces the number of triangles in a mesh.
Storing and processing large meshes can be expensive. In some cases a simpler representation of the mesh can be just as useful, and more efficient.
Meshes that are output will be smaller to store and easier to process.
The simplification process used by this transformer avoids merging triangles whose appearances differ (for example, by differing textures or colors).
Configuration
Input Ports
Features that contain meshes. The meshes are not required to be triangular.
Output Ports
Features that contain simplified meshes. The output meshes will have been triangulated.
Features with invalid geometries, including non-manifold meshes, are rejected and output via this port.
Rejected Feature Handling: can be set to either terminate the translation or continue running when it encounters a rejected feature. This setting is available both as a default FME option and as a workspace parameter.
Parameters
Mode |
The simplification process will continue until it cannot simplify further, or until the requirements for the mode have been met. The mode can be Absolute, and continue until finished, or until the number of triangles is below an absolute value (specified by Max Triangles). Alternatively, the mode can be Relative, and continue until finished, or the ratio of triangles after simplification to triangles before simplification is below a set value (specified by Simplification Amount). |
Max Triangles |
Only used in Absolute mode, this specifies the threshold of triangles remaining that will stop the simplification process. This value must be at least 1. |
Simplification Amount |
Only used in Relative mode, this specifies a ratio of triangles remaining to original number of triangles that will stop the simplification process. This value must be between 0 and 1, exclusive. For example, a value of 0.25 will try to output a mesh with one quarter of the number of triangles. |
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 drop-down 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 feature-specific values. | |
FME and workspace-specific parameters may be used. | |
Creating and Modifying User Parameters | Create your own editable parameters. |
Dialog Options - Tables
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:
|
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.
Reference
Processing Behavior |
|
Feature Holding |
No |
Dependencies | |
Aliases | |
History | Released in FME 2018.0 |
FME Community
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Examples may contain information licensed under the Open Government Licence – Vancouver and/or the Open Government Licence – Canada.