01-04-2013, 06:34 PM
(This post was last modified: 01-04-2013, 06:36 PM by puzzledpaul.)
Trying to get the bottom of the 'wall' a close (exact) fit to the geom underneath is essentially (imo) a somewhat different ball game that's been discussed before ... projection ... or, with ref to existing tools ... 'It's Intersect, Jim - but not as we know it' 
Intersect works fine (imo) when there's a single target plane / destination - which is what this isn't.
Returning to the original scenario, not only has the road to be flat (level/horizontal) but it also has to take into account which side of the 'road' is to be used as a height reference,since this can change as it goes over / cuts thro' differently sloping 'hills'.
This is easily (but tediously) achievable using Flatten rmb (+ contrl D), since it's easy for us to decide which side is lower.
For a tool, I'd suggest that could also be one approach - determine which end of every edge sequence across the path / road is lower ... and flatten Y to that ref point / value.
I am,of course, ignoring camber
Btw, I would personally refer to the edges created by Impression as the line of Intersection ... but I accept that this is going back to the days when dinosaurs were browsing and ppl used things called 'drawing boards' ... made from bits of wood.
pp
Ahhhh the joys of x posting
Intersect works fine (imo) when there's a single target plane / destination - which is what this isn't.
Returning to the original scenario, not only has the road to be flat (level/horizontal) but it also has to take into account which side of the 'road' is to be used as a height reference,since this can change as it goes over / cuts thro' differently sloping 'hills'.
This is easily (but tediously) achievable using Flatten rmb (+ contrl D), since it's easy for us to decide which side is lower.
For a tool, I'd suggest that could also be one approach - determine which end of every edge sequence across the path / road is lower ... and flatten Y to that ref point / value.
I am,of course, ignoring camber
Btw, I would personally refer to the edges created by Impression as the line of Intersection ... but I accept that this is going back to the days when dinosaurs were browsing and ppl used things called 'drawing boards' ... made from bits of wood.
pp
Ahhhh the joys of x posting