SMS:Scatter Options: Difference between revisions
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[[Image:Scatter Options.jpg|thumb|375 px|'"Scatter Options'' dialog]] | |||
Scatter options are accessed through the ''Scatter'' menu, [[SMS:Scatter Options|''Scatter Options'']] dialog in the Scatter Module. | |||
===Triangulation Options=== | |||
This section lets the user adjust the maximum aspect ratio of a thin triangle. The aspect ratio is the ratio of the triangle width to the triangle height. All triangles with an aspect ratio less than what is specified are considered thin. | |||
===Long Triangles=== | |||
This section contains options for deleting or selecting long triangles. | |||
===Individual Points=== | |||
This section contains the retriangulate voids when deleting option. When scatter points are deleted, the triangles attached to the scatter points (if any) are also deleted. If this option is on, surrounding triangles are retriangulated to fill the void. | |||
===Triangulation Optimization Options=== | |||
When the optimize triangulation command is invoked, the triangles are optimized in one of two ways: | |||
* ''Angle Optimization'' – The triangles are swapped to conform to the Delaunay Criterion. | |||
* ''Area Optimization'' (SHOALS) – The triangles are swapped to align with other triangles. The swapping is done by comparing the area of one triangle to its neighbor. The user sets a Bias. If the area of the smaller triangle is less than the area of the larger triangle divided by the bias, the triangles are swapped. This is useful for optimizing the triangulation of surveys such as SHOALS surveys. | |||
[[Image:Triangulation_optimization.jpg]] | |||
===Duplicate Vertex Options=== | |||
When the '''Select/Delete Duplicate Points''' menu item is selected, points within a tolerance of other points are selected or deleted. The user sets the Tolerance and whether to delete or select the points when the command is invoked. | |||
Revision as of 18:22, 16 July 2014
Scatter options are accessed through the Scatter menu, Scatter Options dialog in the Scatter Module.
Triangulation Options
This section lets the user adjust the maximum aspect ratio of a thin triangle. The aspect ratio is the ratio of the triangle width to the triangle height. All triangles with an aspect ratio less than what is specified are considered thin.
Long Triangles
This section contains options for deleting or selecting long triangles.
Individual Points
This section contains the retriangulate voids when deleting option. When scatter points are deleted, the triangles attached to the scatter points (if any) are also deleted. If this option is on, surrounding triangles are retriangulated to fill the void.
Triangulation Optimization Options
When the optimize triangulation command is invoked, the triangles are optimized in one of two ways:
- Angle Optimization – The triangles are swapped to conform to the Delaunay Criterion.
- Area Optimization (SHOALS) – The triangles are swapped to align with other triangles. The swapping is done by comparing the area of one triangle to its neighbor. The user sets a Bias. If the area of the smaller triangle is less than the area of the larger triangle divided by the bias, the triangles are swapped. This is useful for optimizing the triangulation of surveys such as SHOALS surveys.
Duplicate Vertex Options
When the Select/Delete Duplicate Points menu item is selected, points within a tolerance of other points are selected or deleted. The user sets the Tolerance and whether to delete or select the points when the command is invoked.
