Acción estática sobre estructuras rígidas

The Design > Point Edit option and associated tools allow you to edit points loaded in Vulcan Envisage. Each of these tools can also be found in the Modify toolbar and associated

subtoolbars.

Table 3: Point Edit Tools

Command Definition

Resequence Changes the starting point of a sequence in a string.

Move Moves a point to a new location.

Move to Intersection

Moves a point to a position that is defined by the intersection of two existing lines. If the two chosen lines do not intersect, then the selected

point will be moved to the point of the projected intersection.

Grid Snap Snaps a point in an object to the nearest intersection of grid lines.

Name Names and labels one or more points in an object.

Z Edit Changes Z value of a point.

W Tag Sets a fourth parameter for a specific point, with the other three param-eters being X, Y and Z.

Weight Point Values

Weights point values (X, Y and Z, and W) by the distance from a refer-ence point, another point value in the same coordinate, or a constant

value.

Register Registers a point or a sequence of points to a loaded grid mesh or tri-angulated surface.

Symbol Edits the size and position of point symbols displayed on-screen.

Colour by Attribute

Colours points by the X, Y and Z, and/or W coordinate values.

Remove Attribute Colouring

Removes the attribute colouring assigned to point values.

Delete Removes individual points from an object.

Delete Duplicate Removes sequential duplicate points from an object.

68 5 Editing Design Data Note:

When selecting points along the line of an object, it is best to select along the line near the point, not on the point, to ensure that the desired point is accurately selected.

Moving a point(s) to a new location:

1. Select Design > Point Edit > Move.

2. When prompted, select an object.

The object will appear highlighted once selected.

3. When prompted, select the point to move.

The selected point will be highlighted and as you move the mouse pointer around, a rubber band line will extend from the point to your mouse pointer.

Figure 5-6: Selected point

Disconnect Removes the line between two points.

Connect Connects a nominated point to adjacent points in the same object.

Adjacent points are those that precede or follow the nominated point in a digitised sequence. Start and end points of a string are also

consid-ered to be adjacent.

Link Creates new strings by linking existing strings within a user defined dis-tance of one another. The original strings remain unchanged.

Cut Deletes a section from a string of points.

Append Adds extra points to either the start or end of a string.

Best Fit Creates a line of best fit between points using the least squares method. The string will be replaced by the line of best fit; if your points are not connected, then the points will be replaced by the start and end

points of the best fit line.

Move By Distance

Moves a point to a specified distance along a line. This line is the line joining the point that you want to move and a reference point, which

does not need to exist prior to this operation.

Move By Point Moves a point to the right angle intersection of an extrapolated line (defined by a reference point and the point to be moved) and a line pro-jected from a nominated point. While the screen does not have to be in plan view when using the operation, it needs to be in plan view when

the geometry (right angle intersection) is performed.

Move By Line Moves a point to the intersection of a line (defined by a reference point and the point you want to move) and an existing line. While the screen does not have to be in plan view when using the operation, it does need

to be in plan view when the geometry is performed.

Table 3: Point Edit Tools (Continued)

Command Definition

Editing Tools 69 4. When prompted, indicate the new point location by clicking on the desired location

on-screen.

You can move more points or right-click twice to exit the command.

Figure 5-7: Moved point

All snap modes can be used when moving points. If indicate is on, then the Z elevation of the point that is moved will change to the default Z elevation. Holding down the shift key while moving a point in indicate mode will allow it to keep its original Z value. Options in Tool >

Preferences on the Input dialog box allow the user to change how Z elevations of points are handled.

Changing the Z value of a point:

1. Select Design > Point Edit > Z Edit.

2. When prompted, select an object.

3. When prompted, select a point.

The Enter the following value dialog box will display.

Figure 5-8: Enter the following value dialog box

4. Enter the new elevation of the point.

5. Click OK.

• The point will be moved to the new elevation.

• You can move more points or right-click twice to exit the command.

.

Tutorial 5.4

1. Load the ramp layer on-screen.

2. Change the Z elevation of the first point to match the elevation of the topo triangulation.

3. Evenly grade the ramp from the first point to the last point.

70 5 Editing Design Data Figure 5-9: Changing Z point