Create Point by Object Intersection

Description

Create a point at the intersection of two objects.

Access

Home / Tools / Create / Point / Object Intersection

Requirements

Solve module

Controls

Control	Description
Name	Type the name to assign to the first created point or click to use the next available auto incremented name.
Linear Object	Select lines, alignments and pipes from the model, or input the line, alignment or pipe shape. Note: This control is disabled if lines. alignments or pipes are selected in the model.
Object	Input the object to intersect.
Height Mode	When intersecting with a line, alignment or polygon select one of the following methods to input a height for the point: Default Height Grade From Linear Object Height Terrain Model When computing an intersection with a shape or terrain model, or computing a 3d intersection with a polygon, 3D Intersection is displayed.
Extrapolate intersection	Do one of the following: Select the checkbox to extend the line, alignment or pipe at the same grade if an intersection with the object is not found. Clear the checkbox to create points for physical intersections only. Note: Only physical intersections with transition curves or splines can be computed.
3D polygon computation	Do one of the following: Select the checkbox to compute a 3 dimensional intersection with a polygon. Clear the checkbox to compute a 2 dimensional intersection with a polygon.
Insert points into object	Do one of the following: Select the checkbox to create points and insert vertices from the created points into an editable line, pipe or alignment. Clear the box to create points at the intersection without editing the linear object. Note: You can create points for transition curves or splines but they can not be inserted into the line. This control is disabled if the linear object is in a reference file or a locked layer.
Break linear object at intersection	Select the checkbox to break the linear object at the vertex where it intersects with the object. Clear the checkbox to create points at the intersection without breaking the linear object. Note: You can create points for transition curves or splines but the line, pipe or alignment cannot be broken at these vertices.. This control is disabled if the linear object is in a reference file or a locked layer.

Notes

You can create points at the intersection of a line, alignment or pipe, and a polygon, shape, terrain model or another line, alignment or pipe.
Create points at the intersection of a linear object with an object using:
- A selection of linear objects: Intersections are computed with the Object for all selected lines, pipes and alignments. If an intersection can not be computed for any of the linear objects in the selection then all intersections are discarded.
- A single linear object: Input a single Linear Object to intersect with the Object.
Points are created for all intersections with the object.
Computations are performed in:
- 2 dimensions when creating a point at the intersection with lines, alignments and pipes.
- 3 dimensions when creating a point at the intersection with terrain models and shapes (excluding pipes).
- 2 or 3 dimensions when creating a point at the intersection with a polygon, depending on the configuration of the 3D polygon computation checkbox.
When computing a 2D intersection the Height mode is used to compute the vertices height.
When computing a 3D intersection, intersections are computed for straight segments only.
Selecting the 3D polygon computation checkbox automatically sets the Height control to 3D Intersection.
For pipes, the point is created at the intersection of the pipes centreline.
When Extrapolate intersection is selected, the end of the line, alignment or pipe closest to the mouse pointer when the line or pipe is picked is extended. If operating on a selection, both ends of the line are extrapolated if possible.
When the height mode is configured to Grade From Linear Object:
- the heights on either end of the linear object segment intersecting with the Object are used to interpolate the height.
- and the intersections are extrapolated, the heights from the extrapolated segment of the object are used to interpolate the points heights.
- and the object segment has vertices with default height, the point will be created with a default height.