This subassembly automatically applies various subassemblies, such as widening, curb and gutter, ditching, or daylighting, to an assembly based on whether an offset target is found at the corridor station.
The ConditionalHorizontalTarget subassembly is a conditional subassembly, which is a special type of subassembly. Conditional subassemblies automatically add specified subassemblies to an assembly when certain conditions, which you specify, exist.
For example, when an assembly contains a ConditionalHorizontalTarget subassembly, Autodesk Civil 3D analyzes the station to determine whether an offset target exists within a specified distance. Depending on the ConditionalHorizontalTarget subassembly parameters, different types of subassemblies are automatically added to the assembly.
To learn more about how to use a conditional subassembly, see the tutorial.
The following illustration shows a corridor assembly section comprised of:
- a left side lane and a right side lane
- four ConditionalHorizontalTarget subassemblies (two on the left side and two on the right side)
- the top left side ConditionalHorizontalTarget subassembly is configured to automatically add a sidewalk subassembly when an offset target is detected.
- the bottom left side ConditionalHorizontalTarget subassembly is configured to automatically add Shoulder and Gradient subassemblies on the left side, when an offset target is not detected.
- similarly, the top right side ConditionalHorizontalTarget subassembly is configured to add a sidewalk subassembly when an offset target is detected, while the bottom right side ConditionalHorizontalTarget subassembly adds Shoulder and Gradient subassemblies on the right side, when an offset target is not detected.
You can add one or multiple ConditionalHorizontalTarget subassemblies to an assembly to create simple or complex conditional behaviors. For example, in the case of the previous example, you can add a set of polylines to the model that show the location of sidewalks. Because the lines stop where driveways cross the sidewalk, the conditional subassembly adds and removes the sidewalk depending on the presence of the sidewalk line. The conditional subassembly eliminates the need to apply a different assembly to the corridor where a sidewalk is not needed.
When you create an assembly using ConditionalHorizontalTarget subassemblies, the assembly construction displayed in the Construction tab of the Assembly Properties dialog box indicates the order in which the subassemblies are processed.
It is important to note the following when using the ConditionalHorizontalTarget subassembly:
- Autodesk Civil 3D analyzes the location of the station associated with the subassembly relative to the target offset to determine whether the offset is found.
- When an assembly containing ConditionalHorizontalTarget subassemblies is applied to a corridor model, only specific portions of the assembly are applied to any given assembly construction.
- Since the ConditionalHorizontalTarget subassembly uses targets, you must set targets on any ConditionalHorizontalTarget subassemblies before you generate the corridor. If the targets are not set, the subassembly returns Not Found. For more information, see To Specify Corridor Targets.
- Unlike most other subassemblies, the ConditionalHorizontalTarget subassembly does not create any points, links, or shapes in modeling mode.
Attachment
This subassembly can be attached to any subassembly or assembly attachment point. Subsequent subassemblies can be attached to the end point of the ConditionalHorizontalTarget subassembly.
Input Parameters
Note: All dimensions are in meters or feet unless otherwise noted. All slopes are in run-over-rise form (for example, 4 : 1) unless indicated as a percent slope with a “%” sign.
| Parameter | Description | Type | Default |
|---|---|---|---|
| Side | Specifies the side of the assembly or corridor towards which this subassembly is inserted. | Left/Right | Right |
| Layout Width | Specifies the length of the line that is drawn to represent this subassembly in layout mode. This parameter, in combination with the Layout Grade parameter, enables you to position the ConditionalHorizontalTarget subassembly and subassemblies that are attached to it, but does not display or have any effect in the corridor model. | Numeric, positive |
3.6 m 12.0 ft |
| Layout Grade | Specifies the grade of the line that is drawn to represent this subassembly in layout mode. This parameter, in combination with the Layout Width parameter, enables you to position the ConditionalHorizontalTarget subassembly and subassemblies that are attached to it, but does not display or have any effect in the corridor model. | Numeric, positive, or negative |
1:1 (found) -1:1 (not found) |
| Condition | Specifies the condition available for this subassembly. The Found condition is processed if the offset target is found within the maximum distance. The Not Found condition is processed if the offset target is not set or is not found at the station within the maximum distance. | Found/Not Found | Found |
| Maximum Distance | Specifies the maximum width within which the subassembly looks for the offset target. If the offset is not found within the specified distance, the Not Found conditional is processed. | Numeric, positive |
9999. ft 9999. m |
Target Parameters
This section lists the parameters in this subassembly that can be mapped to offset target objects in a drawing. For more information, see To Specify Corridor Targets.
| Parameter | Description | Status |
|---|---|---|
| Offset | Alignment, feature line, survey figure or polylines. If the specified offset target is found at the station, then the Found condition is processed. | Optional (if not set, the conditional returns Not Found) |
Output Parameters
None.
Behavior
See description.
Layout Mode Operation
In layout mode, this subassembly draws a line using the Layout Width and Layout Grade input parameter values. This line represents the location in the assembly where the ConditionalHorizontalTarget subassembly is applied.
Point, Link, and Shape Codes
Unlike most other subassemblies, the ConditionalHorizontalTarget subassembly does not create any points, links, or shapes in modeling mode.
Coding Diagram
The following coding diagram shows the points and links that are created in layout mode. No point, link, or shape codes are created for this subassembly in modeling mode.
