polyline processing :: Earth Volumetric Studio Help

polyline processing

The polyline processing module accepts a 3D polyline and can either increase or decrease the number of line segments of the polyline. A splining algorithm smooths the line trajectory once the number of points are specified. This module is useful for applications such as a fly over application (along a polyline path drawn by the user). If the user drawn line is jagged with erratically spaced line segments, polyline processing smooths the path and creates evenly spaced line segments along the path.

Ports

Direction	Name	Type	Description
Input	Input Field	Field	The line field to use for splining or smoothing.
Input	Z Scale	Number	The factor for vertical scaling.
Output	Output Data	Field	A line field containing the smoothed or splined line.
Output	Output Object	Renderable	A renderable object displaying the sample data.

Properties

Property	Type	Description
Z Scale	Double	Vertical scaling for writing lines.
Specification Method	Choice: Number Of Points, Path Step Size	The output line segment size can be adjusted via two options. Number of Points mode allows line smoothing adjustments by specifying the number of line segments. Path Step Size mode allows smoothing adjustments by specifying the step size in the units of the input mesh.
Number Of Points	Integer	If the Specification Method is set to Number Of Points, the total number of points in the path can be set using this control.
Path Step Size	Double	If the Specification Method is set to Path Step Size, the length of each path step in the units of the input mesh.
Max Path Step Count	Integer	The max number of lines to create using the Path Step Size specification method.
Resample At End	Boolean	If the Resample At End toggle is ON, the line is segmented before and after being smoothed or splined.
Tolerance	Double	The Tolerance parameter determines how close two disjoint points must be before the two polylines are merged.
Sampling Method	Choice: Spline, Smooth, Preserve Nodes	The Sampling Method allows the user to change how the polyline is created. Spline connects each point with a path determined by the gradient of the points. Smooth keeps to the original path with sharp corners smoothed using the Smoothing Percentage. Preserve Nodes keeps the same path as the input but breaks the path into smaller segments.
Smoothing Order	Integer	The Smoothing Order determines the number of points to be used for splining. More points creates a smoother line that departs more from the original.
Smoothing Percentage	Double	The Smoothing Percentage determines the degree of smoothing. Higher values creates a smoother line that departs more from the original.
Smoothing Iterations	Integer	The Smoothing Iterations is analogous to multiple polyline processing modules connected in series. This provides a means to further smooth erratic lines while staying close to the original points.
Translate Export By Origin	Boolean	The Translate Export by Origin toggle will cause the output to be written in the user’s coordinate space. When this is turned off the output will be written around the origin.
ELF Filename	String	This button allows the user to output the created polyline as an ELF file.