[SOLVED] how do i check if a object has a Look at constraint, or Link constraint?

[stigatle]

i'm stuck at a little line of code..
how do i check if a object has a Look at constraint, or Link constraint?
i cannot seem to figure this one out..

Tried everything i can think of..

[cthomas]

Here is a section of code I used to have tree plates rotate with a camera to always look at the camera.
Hope it helps.

fn PtHelper CameraObj SourceObj i =
(
PtName = "LookAtPT-" + SourceObj.name
PtPos =

PTi = PointHelperObj name:PtName pos:PtPos
-- lac = AddListController SourceObj "Rotation" lookat_constraint
global ListCont = AddListController SourceObj "Rotation" Rotation_List
if classof ListCont.object != LookAt_Constraint then
(
global lac = AddConstraint SourceObj "Rotation" LookAt_Constraint true
)
else
(
global lac = ListCont.object
)

lac.appendTarget PTi 50
SetActiveController ListCont lac
lac.target_axis=1
lac.target_axisFlip=true
lac.viewline_length_abs=false
lac.upnode_axis=2
lac.StoUp_axis=2
)

[stigatle]

After a lot of thinking, i found a sollution to this:

if ($.rotation.controller as string == "Controller:LookAt_Constraint") then
(
--do stuff here
)

For link constraint:

if ($.Transform.controller as string == "Controller:Link_Constraint") then
(
--do stuff here
)

[stigatle]

Run from "utilities\maxscript" menu..

Here's a working code.

utility remlookat "Remove lookat" width:160 height:80
(
    button btn1 "Remove" pos: width:112 height:16
    GroupBox grp2 "Remove constraints" pos: width:144 height:56
    
    on btn1 pressed do
    (
        LookArray = #()
        if selection.count == 0 then (MessageBox "Please select at least one object" title:"ERROR")
        for o in selection do
        if (superclassof o == geometryclass) do
        (
            if (o.rotation.controller as string == "Controller:LookAt_Constraint") then
            (
                append LookArray o
            )
        )
     c = 1
     while c <= LookArray.count do
        (
         snapshot LookArray
         delete LookArray
          c += 1 
        )
    )
)