[JASS] Setting unit Z coordinate

[Gismo359]

So, I am trying to make a few units orb around a hero but the height must be relative to the hero, so they always remain at around his head level.
Unfortunately, while doing it I ran into some very weird results, as seen in the attachment.
There, I try to put them at the exact same Z as the hero, so the problem is much more visible.
The numbers on the side are the flying heights of the units (go up to 30 while moving, and never go below 0.0010).

call SetUnitFacing(udg_Orbs[i], udg_OrbAA[i] + bj_PI/4) // in case these make any difference at all
call SetUnitPosition(udg_Orbs[i], x, y) // so the unit turns properly without going glitching

//x and y are the unit's new coordinates
//mx and my are the hero's coordinates
//udg_Orbs[i] is the unit in question

call SetUnitX(udg_Orbs[i], x)
call SetUnitY(udg_Orbs[i], y)
set loc = Location(mx, my)
set mz = GetLocationZ(loc) // Hero has fly height of 0, so not adding it

call MoveLocation(loc, x, y)

call SetUnitFlyHeight(udg_Orbs[i], mz - GetLocationZ(loc)/* + height to head level, when I fix it */, 0)
call BJDebugMsg(R2S(GetUnitFlyHeight(udg_Orbs[i])))

I am pretty sure this became a problem after 1.27, though I may be wrong and just not noticed it before (although it is very obvious).
What I know for sure, is that the hero's head is around fly height 75, and the 24 fly height units around it go much higher.
Not only that, but the orb that is seen above him is actually on lower ground.

What could I be missing? I havent had this happen before, I think it might be a bug in the new patch.

 

[Emm-A-]

Well, the reason these numbers dont go below 0.0001 or so, is that you cannot move a unit underground, isnt it?

I just tried it out by

call SetUnitFlyHeight( gg_unit_hgry_0000, 250. - GetLocationZ(GetUnitLoc(gg_unit_hgry_0000)), 0. )

and the unit increases the fly height to more than 300., if the terrain gets lower than 0.

From this, I can confirm your findings

 

[Meatmuffin]

I have gotten myself around negative values with an if condition

if z2 > z then
     actions if z2 height is greater than z height
else
     actions the other way around
endif

Subtract/add your terrain height based on which level is higher.

 

[Gismo359]

My problem is that the unit is appearing much higher than it should, and I have no idea why.
Here is a few more screenshots - in the first one, the difference in the Z of each of the orbs is at maximum 5 (639-643) yet one of them significantly higher than the others (even higher than the hero model).

The others are when the fly height is exactly 75 at all times - they appear in very different positions. I even tried moving them at the exact XY coordinates of the hero and the distance to the terrain was visibly changing (and it shouldnt be).

Also, I havent touched model scaling and the cliff leves are the same in all screenshots.

 

[Anitarf]

If your orbs are using the "Fly" movement type, change it to "Hover" and use the crow form trick to make their flying height changeable.

 

[Gismo359]

Oh, I didnt know thats how Fly worked. I thought it was the same as Hover. Problem solved, thanks!

 

[Arad MNK]

You can use Auto-Fly by Nestharus too, as well as TerrainZ by someone I don't remember right now.