4 th Tuesday – CAD Training Call-in Info: (865) , PIN: Topic – InRoads XM:  Project to Surface Constraints One point projected to the surface Project the entire component segment (Drape) Project just the points – strike a straight line between Etiquette:  Presentation will begin at 1:32 pm.  Please feel free to call-in or exit at anytime.  You may mute your own phone lines – dial #01.  You may un-mute your own phone lines – dial #01- for questions or discussion.  Please raise your hand (click the open hand icon at the top of the iLinc tool panel) if you have display issues.

Project to Surface Constraint Where and how do you set the Project to Surface constraint? What happens when I use it? What happens when it fails? What happens if there are two adjacent points on a component that are projected? How do I create a flat surface between two projected points?

Setting the Project to Surface Constraint 1. Must be used with another constraint on the same point. 2. Projects in direction that is not constrained. 3. If no surface, then point is placed as in the template. The surface has to be loaded in order to set the constraint!

Setting the Project to Surface Constraint 2 adjacent points set to Project to Surface = Drape component segment 1 point set to Project to Surface

Using the Project to Surface Constraint Lane – Median – Median - Lane 2 adjacent points set to Project to Surface = Drape

What can cause the Project to Surface to fail? 1. Not loading the surface that it uses The target surface does not have to be the “Active” surface for the corridor – but it must be open in InRoads! 2. Missing the surface Goes off the edge or hits a hole Result? Uses the template location (relative to the 0,0 point).

Why might I want to drape the component? Grinding quantities If the top surface of the component drapes existing and the bottom strikes a nice straight slope – you can get quantity of a grind.

Why might I want to drape the component? Leveling quantities If the top surface of the component strikes a nice straight slope and the bottom drapes existing – you can get quantity of a leveling.

What if I don’t want to drape the component? Inlay to correct a slope Two components – one that drapes to get the grinding quantity, and one that doesn’t to get the inlay quantity. The component that doesn’t drape uses a null point as a reference to break the relationship between two adjacent points.

Can use null points to break up the adjacent points. Med_nul hz to CL Proj2Surf Med_Inlay hz to CL vt to Med_nul TL_L hz to Med_L Proj2Surf TL_L hz to Med_L Proj2Surf Med_L hz to CL Proj2Surf

Tips for working with null points Only points that are named differently can be constrained differently.  Points merge when you “snap” new components to them. Component placement will take a couple of steps to keep the points from merging automatically. Place near, move into position, then constrain. Projecting CL to surface  Drape a vertical alignment – set corridor to use draped vt.  Place a CL_null point at 0,0; constrain CL, that is part of your regular components, hz to CL_null and Proj2Surf Sometimes null points can be used to eliminate recursive errors on constraints Null points could be used to create “intelligent” features on a non- intelligent existing surface.  Null points are not automatically included in the created surface.  When created, null points produce features that are not triangulated. If you need to get reports out on these, you can always toggle them to triangulate, do so, and then get the report out.

Questions and Discussion