Trying to find intersection of 2 sloped beams

I think you need to draw a picture or two  - I cannot grasp the setup with the beams..

Waiting for a picture as Henrik suggested....

I have tried querying a 3D position.

Using P-Line Intersection snap option you have the possibility to choose which of the two elevations you want:

Does it help?

Version is 3.1.7.2

Check object pointvector

Sure. Understand. Was a bit difficult to explain.

I wanted to find either or both pt1 and pt2. Using pointvectors I was getting the correct xy intersection from memory, but the z value was halfway bw pt1 and pt2, which is not what I wanted.

I managed to find a solution by using a combination of pointvectors and planes but even that I have now run into a minor issue. I want to find the perpendicular orientation to a beams zdir as the passed ori to the plane function. I thought that would be easily achieved by using PLORI NAL /NAR as they run perp to the beam. Issue is it comes up unset. Not sure why that is. It's std PML. I guess i can get the zdir of the beam and add 90 to the angle value and do it that way, but thought there might be a more elegant way to do it

That's what I was using. Maybe it was my method that was incorrect

I was trying to get the intersection coords in PML

AID CLEAR ALL 200
!g1 = =18994/1326
!g2 =  =18994/1330
!plane = object plane(X0 Y0 Z0 WRT WORLD, Y IS N AND Z IS U WRT WORLD) 

!l1 = !g1.plstart.na.line(!g1.plend.na)
!l2 = !g2.plstart.na.line(!g2.plend.na)

!l1proj = !l1.projected(!plane)
!l2proj = !l2.projected(!plane)

!projectedIntersection = !l1proj.intersection(!l2proj)

!intersectionLine = !projectedIntersection.line(!projectedIntersection.offset(!plane.orientation.zdir(), 2m))

!g1intersection = !l1.intersection(!intersectionLine)
!g2intersection = !l2.intersection(!intersectionLine)
if not !l1.on(!g1intersection, true) then
	$p 1 not on the bounded line
else
	pin1 at $!g1intersection
endif
if not !l2.on(!g2intersection, true) then
	$p 2 not on the bounded line
else
	pin2 at $!g2intersection
endif


!!aidline(200, !g2intersection, !g1intersection)


!ortho = !g1.plstart.na.direction(!g1.plend.na).orthogonal(!g1.plstart.nar.direction(!g1.plstart.nal))

!arrow = object ARROW()
!arrow.length = 5m
!arrow.dir =  !ortho
!arrow.pos = !g1.plstart.na

!!drawAidArrow(200, !arrow)

Thanks. When I get a minute I will run it
Your method of getting the perpendicular directon to the beams zdir is very good and all with one line of code.

if u write PML post here, we could review and check it together.