SMS:2D Mesh Polygon Properties: Difference between revisions

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[[Image:2D Mesh Poly Properties.jpg|thumb|450 px|''2D Mesh Polygon Properties'' dialog]]
[[Image:2D Mesh Poly Properties.png|thumb|450 px|''2D Mesh Polygon Properties'' dialog]]
The ''2D Mesh Polygon Properties'' dialog is used to set meshing options for the conceptual model. See [[SMS:Mesh_Generation|Mesh Generation]] for a discussion of the conceptual modeling approach.
The ''2D Mesh Polygon Properties'' dialog is used to set meshing options for the conceptual model. See [[SMS:Mesh_Generation|Mesh Generation]] for a discussion of the conceptual modeling approach.


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The following polygon attributes can be set:
The following polygon attributes can be set:
* ''Mesh Type'' – Specify the mesh generation algorithm. The following options are available:
* ''Mesh Type'' – Specify the mesh generation algorithm. The following options are available:
<blockquote style="margin-top:0px; margin-bottom:0px;">
**None
*None
** [[SMS:Patch|Patch]]
* [[SMS:Patch|Patch]]
** [[SMS:Paving|Paving]]
* [[SMS:Paving|Paving]]
** [[SMS:Paving#Scalar Paving Density|Scalar Paving Density]]
* [[SMS:Paving#Scalar Paving Density|Scalar Paving Density]]
** [[SMS:Paving#Constant Paving Density|Constant Paving Density]]
* Existing Nodes
** Existing Nodes
</blockquote>
* ''Bathymetry Type'' &ndash; Specify the bathymetry source for assignment to the mesh. The following options are available:
* ''Bathymetry Type'' &ndash; Specify the bathymetry source for assignment to the mesh. The following options are available:
<blockquote style="margin-top:0px; margin-bottom:0px;">
** Constant &ndash; Assigns a constant elevation value to all nodes in the mesh.
* Constant &ndash; Assigns a constant elevation value to all nodes in the mesh.
** Scatter set &ndash; [[SMS:Scatter Interpolation|Interpolates]] elevation values from the specified [[SMS:Scatter Module|scatter set]].
* Scatter Set &ndash; [[SMS:Scatter Interpolation|Interpolates]] elevation values from the specified [[SMS:Scatter Module|scatter set]].
** Existing Mesh &ndash; Interpolates elevation values from an existing 2D mesh.
* Existing Mesh &ndash; Interpolates elevation values from an existing 2D mesh.
** Raster &ndash; Interpolates elevation values from an existing raster image.
* Raster &ndash; Interpolates elevation values from an existing raster image.
** Fill polygon from edges &ndash; Interpolates elevation values from the polygon vertex and node Z-values using the [https://en.wikipedia.org/wiki/Coons_patch Coon's patch algorithm] to interpolate internal mesh elevations.
</blockquote>
* ''Material'' &ndash; [[SMS:Materials Data|Material type]] to assign to elements created within the polygon.
* ''Material'' &ndash; [[SMS:Materials Data|Material type]] to assign to elements created within the polygon.
* ''Arc Options'' &ndash; Used to modify the feature vertices along the arc. The arc must be selected in the polygon preview window. The following options are available:
* ''Arc Options'' &ndash; Used to modify the feature vertices along the arc. The arc must be selected in the polygon preview window. The following options are available:
<blockquote style="margin-top:0px; margin-bottom:0px;">
** Use Original Vertices
* Use Original Vertices
** Distribute Vertices &ndash; Change the number of vertices along the arc. A bias can be specified rather than distributing the vertices with a constant spacing.
* Distribute Vertices &ndash; Change the number of vertices along the arc. A bias can be specified rather than distributing the vertices with a constant spacing.
</blockquote>
* ''Node Options'' &ndash; When the mesh type is set to [[SMS:Patch|Patch]], the node options are used to define the 3 or 4 sides for the patch mesh generation. If a feature point is selected in the polygon preview window, the following options are available:
* ''Node Options'' &ndash; When the mesh type is set to [[SMS:Patch|Patch]], the node options are used to define the 3 or 4 sides for the patch mesh generation. If a feature point is selected in the polygon preview window, the following options are available:
<blockquote style="margin-top:0px; margin-bottom:0px;">
** Split &ndash; The mesh generation algorithm will treat the two arcs meeting at the feature point as separate sides.
* Split &ndash; The mesh generation algorithm will treat the two arcs meeting at the feature point as separate sides.
** Merge &ndash; The mesh generation algorithm will treat the two arcs meeting at the feature point as a single side.
* Merge &ndash; The mesh generation algorithm will treat the two arcs meeting at the feature point as a single side.
** Degenerate Edge &ndash; The mesh generation algorithm will treat the two arcs meeting at the feature point as a "degenerate edge." When using a degenerate edge, the patching algorithm will require only 3 sides to be defined. This option is only valid for meshes which allow triangular elements. Only one degenerate edge can be specified per feature polygon.
* Degenerate Edge &ndash; The mesh generation algorithm will treat the two arcs meeting at the feature point as a "degenerate edge." When using a degenerate edge, the Patching algorithm will require only 3 sides to be defined. This option is only valid for meshes which allow triangular elements. Only one degenerate edge can be specified per feature polygon.
</blockquote>


==Mesh Preview==
==Mesh Preview==
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===Preview Tools===
===Preview Tools===
The following tools are available for the ''2D Mesh Polygon Properties'' dialog. Changes that are made to the polygon, such as adding a vertices or moving a node, will be made to the polygon once the dialog is closed by clicking '''OK'''. When nodes or vertices are moved, a preview can also be seen in the main graphics window if the dialog is not covering the changed area.
The following tools are available for the ''2D Mesh Polygon Properties'' dialog. Changes that are made to the polygon, such as adding a vertices or moving a node, will be made to the polygon once the dialog is closed by clicking '''OK'''. When nodes or vertices are moved, a preview can also be seen in the main graphics window if the dialog is not covering the changed area.
*[[Image:Select Feature Point or Node.png]] '''Select Feature Node''' &ndash; Allows selecting a node which can then be moved to change the shape of the polygon.
*[[File:SMS Select Node Tool.svg|15 px]] '''Select Feature Node''' &ndash; Allows selecting a node which can then be moved to change the shape of the polygon.
*[[File:Select Feature Vertex icon.png]] '''Select Feature Vertex''' &ndash; Allows selecting a vertex which can be deleted or moved to change the shape of the polygon.
*[[File:SMS Select Vertex Tool.svg|16 px]] '''Select Feature Vertex''' &ndash; Allows selecting a vertex which can be deleted or moved to change the shape of the polygon.
*[[File:Create Feature Vertex icon.png]] '''Create Feature Vertex''' &ndash; Adds a vertex along an arc belonging to the polygon.
*[[File:SMS Create Vertex Tool.svg|16 px]] '''Create Feature Vertex''' &ndash; Adds a vertex along an arc belonging to the polygon.
*[[File:Pan static tool.png]] '''Pan''' &ndash; Moves the what portion of the polygon is visible in the preview area.
*[[File:Pan Tool.svg|15 px]] '''Pan''' &ndash; Moves the what portion of the polygon is visible in the preview area.
*[[File:Zoom tool.png]] '''Zoom''' &ndash; Magnifies or shrinks the polygon in the preivew area.
*[[File:Zoom Tool Icon.svg|16 px]] '''Zoom''' &ndash; Magnifies or shrinks the polygon in the preivew area.
*[[File:Frame macro in SMS.png]] '''Frame''' &ndash; Centers and resizes the polygon to fit in the preview area.
*[[File:Frame Macro.svg|16 px]] '''Frame''' &ndash; Centers and resizes the polygon to fit in the preview area.
*[[File:WMSIcon Delete.png]] '''Delete Selected Feature Vertices''' &ndash; Removes the selected vertex from the polygon.
*[[File:Delete Macro Icon.svg|14 px]] '''Delete Selected Feature Vertices''' &ndash; Removes the selected vertex from the polygon.


== Related Topics ==
== Related Topics ==
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[[Category:SMS Map Dialogs]]
[[Category:SMS Map Dialogs]]
[[Category:SMS 2D Mesh|P]]
[[Category:SMS 2D Mesh|P]]
[[Category:SMS Mesh Dialogs]]
[[Category:SMS Mesh Dialogs|Pol]]

Revision as of 19:47, 10 December 2018

2D Mesh Polygon Properties dialog

The 2D Mesh Polygon Properties dialog is used to set meshing options for the conceptual model. See Mesh Generation for a discussion of the conceptual modeling approach.

To access the 2D Mesh Polygon Properties go to Feature Objects | Attributes. The 2D Mesh Polygon Properties dialog will open. Double-clicking inside a polygon will also bring up the 2D Mesh Polygon Properties.

The following polygon attributes can be set:

  • Mesh Type – Specify the mesh generation algorithm. The following options are available:
  • Bathymetry Type – Specify the bathymetry source for assignment to the mesh. The following options are available:
    • Constant – Assigns a constant elevation value to all nodes in the mesh.
    • Scatter set – Interpolates elevation values from the specified scatter set.
    • Existing Mesh – Interpolates elevation values from an existing 2D mesh.
    • Raster – Interpolates elevation values from an existing raster image.
    • Fill polygon from edges – Interpolates elevation values from the polygon vertex and node Z-values using the Coon's patch algorithm to interpolate internal mesh elevations.
  • MaterialMaterial type to assign to elements created within the polygon.
  • Arc Options – Used to modify the feature vertices along the arc. The arc must be selected in the polygon preview window. The following options are available:
    • Use Original Vertices
    • Distribute Vertices – Change the number of vertices along the arc. A bias can be specified rather than distributing the vertices with a constant spacing.
  • Node Options – When the mesh type is set to Patch, the node options are used to define the 3 or 4 sides for the patch mesh generation. If a feature point is selected in the polygon preview window, the following options are available:
    • Split – The mesh generation algorithm will treat the two arcs meeting at the feature point as separate sides.
    • Merge – The mesh generation algorithm will treat the two arcs meeting at the feature point as a single side.
    • Degenerate Edge – The mesh generation algorithm will treat the two arcs meeting at the feature point as a "degenerate edge." When using a degenerate edge, the patching algorithm will require only 3 sides to be defined. This option is only valid for meshes which allow triangular elements. Only one degenerate edge can be specified per feature polygon.

Mesh Preview

The preview area allows seeing and editing how the mesh will appear after the polygon has been converted to the Mesh module. This area has the following tools and options:

  • Preview Mesh – The preview area does not update automatically. Clicking this button will display how the mesh will appear after conversion. After any options in the dialog are changed, this button must be clicked again to show the changes.

Preview Tools

The following tools are available for the 2D Mesh Polygon Properties dialog. Changes that are made to the polygon, such as adding a vertices or moving a node, will be made to the polygon once the dialog is closed by clicking OK. When nodes or vertices are moved, a preview can also be seen in the main graphics window if the dialog is not covering the changed area.

  • SMS Select Node Tool.svg Select Feature Node – Allows selecting a node which can then be moved to change the shape of the polygon.
  • SMS Select Vertex Tool.svg Select Feature Vertex – Allows selecting a vertex which can be deleted or moved to change the shape of the polygon.
  • SMS Create Vertex Tool.svg Create Feature Vertex – Adds a vertex along an arc belonging to the polygon.
  • Pan Tool.svg Pan – Moves the what portion of the polygon is visible in the preview area.
  • Zoom Tool Icon.svg Zoom – Magnifies or shrinks the polygon in the preivew area.
  • Frame Macro.svg Frame – Centers and resizes the polygon to fit in the preview area.
  • Delete Macro Icon.svg Delete Selected Feature Vertices – Removes the selected vertex from the polygon.

Related Topics