[Create grid from Polygonal line and width]

Description: Creates a grid that smoothly follows a Polygonal line. Figure 218 shows an example of a grid created by this algorithm.

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Figure 218 Example of grid created from Polygonal lines and widths

After selecting this algorithm, click on the canvas to specify a few points on the centerline of the grid. To finish, press the Enter key or double click. Figure 219 shows an example of the display when the grid centerline has been set.

After the centerline has been set, select [Create Grid] from [Grid] on the menu. The [Grid Creation] dialog (Figure 220) will open. Click on [Apply] to see the resulting grid, adjust the input data and click on [OK].

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Figure 219 Example of display after the grid centerline has been set

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Figure 220 Example of the [Grid Creation] dialog

To edit the vertexes of the centerline, select from the menu shown in Table 16.

[Add Vertex] (A)

Description: Adds vertices to the centerline.

While selecting it, move the mouse onto the centerline. The mouse cursor changes shape as shown in Figure 221. Left clicking adds a new vertex.

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Figure 221 Mouse cursor display when adding a vertex is possible

[Remove Vertex] (R)

Description: Removes a vertex from the centerline.

While selecting it, move the mouse onto the centerline. The mouse cursor changes shape as shown in Figure 222. Left clicking removes the selected vertex.

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Figure 222 Mouse cursor shape when removing the vertex is possible

[Edit Vertices Coordinates] (O)

Description: Edits the coordinates of the vertex of centerline.

When you select this, the [Polyline Coordinates] dialog (Figure 223) will open. Edit the coordinates and click on [OK].

../../_images/poly_centerline_coordinates_dialog.png

Figure 223 [Centerline Coordinates] dialog

[Line Direction] (E)

Description: Reverce the center line direction. Figure 224 shows an example. Note that the “Upstream” and “Downstream” are reversed.

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Figure 224 Example of Center line before and after reversing

[Remove Centerline] (C)

Description: Removes the centerline and restores the condition immediately after the algorithm was selected.

After removing the centerline, click on the canvas to define the centerline in the same way as the first centerline was defined after selecting the algorithm.