FME Transformers: 2024.2

Categories
3D

3D

Categories
3D

3D

SharedItemIDSetter

Sets Shared Object IDs onto the front and/or back sides of geometries.

You may also, at the same time, generate the texture coordinates of the surfaces that are affected. Texture coordinates are only required where Raster textures are used.

Geometry Definition IDs can be set on existing Geometry Instances. New Geometry Instances can be created by setting a Geometry Definition ID on a single Point, or on an aggregate containing a single Point. The Point coordinates will be the insert location of the new Geometry Instance, and any matrix that may exist on the Aggregate will be used as the placement matrix (scale, offset, rotation, etc.) for the new Geometry Instance.

Setting a Geometry Definition ID on a single oriented Point will result in the Point’s orientation being used as the placement matrix for the new Geometry Instance.

Configuration

Input Ports

Each input feature should contain the geometries to set Shared Object IDs on, as well as the IDs to use, stored as traits or attributes.

Output Ports

All input Geometry features that have had Shared Object IDs set.

Input features where no geometry part matches the Geometry XQuery.

Input features that could not have a Shared Object ID set.

Parameters

Item Type

Select the type of items to set:

  • Any (default)

  • Appearance

  • Texture

  • Raster

  • Geometry Definition

Side

When Item Type is Any, Appearance, Texture, or Raster, select the sides to set:

Front Side

The ID will be applied to the front side of the geometry part only.

Back Side

The ID will be applied to the back side of the geometry part only.

Front and Back Sides

The ID will be applied to both sides of the geometry part.

Geometry Part Selection

Use this parameter to isolate only a portion of the input geometry.

If no criteria are specified, the action will apply to the entire geometry at all levels.

Selection can be based on structural location, geometry name, type, appearance information, traits, trait storage types, or definition reference. The syntax used is a restricted set of XQuery, where the return clause is fixed.

The basic Geometry XQuery dialog allows you to construct simple selection queries by automatically writing the necessary query based on specified test clauses. Clicking the Switch to Advanced button opens the Advanced Editor, which allows you to type a query free-form, for more expressive queries.

Note  Once you switch to Advanced mode, you will have to clear all parameters before you can return to Basic mode.

A hierarchical geometry is represented as nodes of type geometry, with attributes containing information about traits, type, and name for each geometry.

Retrieve Shared Item ID

Select the source of the Shared Item ID:

  • From Trait

  • From Attribute

Shared Item ID Attribute

When Retrieve Shared Item ID is From Attribute, specify the name of the attribute containing Shared Item IDs.

Shared Item ID Trait

When Retrieve Shared Item ID is From Trait, specify the name of the trait containing Shared Item IDs.

Use Existing Texture Coordinates

When an appearance with a raster texture is set, each part of the Geometry that is affected will also require texture coordinates.

  • If No, new texture coordinates are always calculated for each part of the geometry that is affected by the appearance which is being set.

  • If Yes, new texture coordinates are only calculated on the affected parts of the geometry where they do not already exist. Existing texture coordinates are left unchanged.

Texture Mapping Type

Specify how the texture defined in an appearance style is mapped onto the surface.

This is only applicable to textures which have raster images.

Surface Normal

Textures are projected onto the surfaces along their normals. For composite surfaces and meshes, each of the child parts will be treated separately, since the parts can have different normals.

From Top View

Textures are projected onto the surfaces along a single normal – one that is perpendicular to the x-y plane. In this mode, a composite surface is considered as one single geometry when the texture coordinates are applied.

Top Down Georeferenced

Textures are projected onto the surfaces using coordinates calculated based on a single normal perpendicular to the x-y plane and raster georeferencing information.

From Texture Coordinate Generation Parameters Attribute

Textures are projected onto the surfaces using information stored in the fme_appearance_texture_gen_info attribute. This attribute can be generated by the SharedItemRetriever or AppearanceExtractor.

Surface Normal in Ground Units

Textures are uniformly projected onto all surfaces rather than scaling per surface. Texture projection settings are calculated automatically based on the size of the texture.

u Origin Offset

Specify how the texture is shifted in the u direction.

v Origin Offset

Specify how the texture is shifted in the v direction.

Texture u Repeat Factor

Specify the number of times the texture is repeated in rows.

Texture v Repeat Factor

Specify the number of times the texture is repeated in columns.

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.

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.

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.

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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