GMS:TIN Display Options: Difference between revisions
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! width="125" | Display Option !! Description | ! width="125" | Display Option !! Description | ||
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| Vertices || If the Vertices item in the ''TIN Display Options'' dialog is set, the TIN vertices are displayed each time the Graphics Window is refreshed. Since it is possible to accidentally drag points, vertices can be "locked" to prevent them from being dragged or edited by selecting the '''Lock ALL Vertices''' command from the ''TINs'' menu. Vertices can be unlocked by unchecking the '''Lock ALL Vertices''' command in the TINs menu. Both a "Locked" and "Unlocked" vertex color may be set so that there is a visible difference when displaying the TIN. (See [[GMS:TIN Module#Editing a TIN|Editing TINs]]) | | Vertices || If the Vertices item in the ''TIN Display Options'' dialog is set, the TIN vertices are displayed each time the Graphics Window is refreshed. Since it is possible to accidentally drag points, vertices can be "locked" to prevent them from being dragged or edited by selecting the '''Lock ALL Vertices''' command from the ''TINs'' menu. Vertices can be unlocked by unchecking the '''Lock ALL Vertices''' command in the ''TINs'' menu. Both a "Locked" and "Unlocked" vertex color may be set so that there is a visible difference when displaying the TIN. (See [[GMS:TIN Module#Editing a TIN|Editing TINs]]) | ||
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| Triangle edges || If this item is on the lines that make up each triangle are displayed. The color of the triangle edges can be adjusted according to the following options: | | Triangle edges || If this item is on the lines that make up each triangle are displayed. The color of the triangle edges can be adjusted according to the following options: | ||
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|- id="thiessen polygons" | |- id="thiessen polygons" | ||
| Thiessen polygons || If the Thiessen polygons item is set, a Thiessen polygon for each TIN vertex is displayed each time the display is refreshed. The edges of the Thiessen polygons are formed by the perpendicular bisectors of the edges of the triangles in the TIN. The vertices of these polygons correspond to the centers of the circumcircles of the [[GMS:Triangulation|Delauney triangulation]]. Any location inside a Thiessen polygon is closer to the TIN vertex contained in that polygon than to any other TIN vertex. The red polygons in the image below correspond to the Thiessen polygons for this TIN. | | Thiessen polygons || If the ''Thiessen polygons'' item is set, a Thiessen polygon for each TIN vertex is displayed each time the display is refreshed. The edges of the Thiessen polygons are formed by the perpendicular bisectors of the edges of the triangles in the TIN. The vertices of these polygons correspond to the centers of the circumcircles of the [[GMS:Triangulation|Delauney triangulation]]. Any location inside a Thiessen polygon is closer to the TIN vertex contained in that polygon than to any other TIN vertex. The red polygons in the image below correspond to the Thiessen polygons for this TIN. | ||
: [[Image:thiessen.gif|frame|none|200px]] | : [[Image:thiessen.gif|frame|none|200px]] | ||
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| Circumcircles || If the Circumcircles item is set, the circumcircle enclosing the three vertices for each triangle are drawn when the display is refreshed. Circumcircles provide the basis of a [[GMS:Triangulation|Delauney triangulation]] since the Delauney criterion is satisfied by ensuring that no circumcircle encloses a vertex. Displaying circumcircles can aid in the understanding of the triangulation process. The red circles in the figure are the circumcircles for the TIN. | | Circumcircles || If the ''Circumcircles'' item is set, the circumcircle enclosing the three vertices for each triangle are drawn when the display is refreshed. Circumcircles provide the basis of a [[GMS:Triangulation|Delauney triangulation]] since the Delauney criterion is satisfied by ensuring that no circumcircle encloses a vertex. Displaying circumcircles can aid in the understanding of the triangulation process. The red circles in the figure are the circumcircles for the TIN. | ||
: [[Image:circum.gif|frame|none|200px]] | : [[Image:circum.gif|frame|none|200px]] | ||
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| Vertex numbers || If the Vertex numbers item is set, the number of each vertex is displayed adjacent to the vertex. | | Vertex numbers || If the ''Vertex numbers'' item is set, the number of each vertex is displayed adjacent to the vertex. | ||
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| Scalar values || If the Scalar values item is set, the active | | Scalar values || If the ''Scalar values'' item is set, the active dataset value of each vertex is displayed adjacent to the vertex. | ||
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| Contours || Most of the objects supported by GMS can be contoured by turning on the [[GMS:Contour Options|Contour Options]] in the ''Display Options'' dialog. When an object is contoured, the values associated with the active | | Contours || Most of the objects supported by GMS can be contoured by turning on the [[GMS:Contour Options|''Contour Options'']] in the ''Display Options'' dialog. When an object is contoured, the values associated with the active dataset for the object are used to generate the contours. | ||
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| Vectors || If the [[GMS:Vectors|Vectors]] item in the ''Display Options'' dialog is selected for an object (TIN, Grid, or Mesh), vector plots can be generated using the active vector | | Vectors || If the [[GMS:Vectors|''Vectors'']] item in the ''Display Options'' dialog is selected for an object (TIN, Grid, or Mesh), vector plots can be generated using the active vector dataset for the object. One vector is placed at each node, cell, or vertex. | ||
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