[Closed] Define plane from normal vector

Have you looked at the “How do I align the UVW_Modifier’s Gizmo to a selected face?” example in the Maxscript Help?

-Eric

Hi Rorschach,
if you need 3 generic points on the plane defined by position and normal vector, you can use the matrixFromNormal MaxScript function. The three point you’ll get will be the first input position, and two points on plane defining an angle of 90 degrees distant 1 unit from the plane origin.

function planeFromNormal p3PlanePos p3PlaneNorm =
(
    if ((classOf p3PlanePos) == Point3) and ((classOf p3PlaneNorm) == Point3) then
    (
        local m3Temp = matrixFromNormal (normalize(p3PlaneNorm))

        -- points for visual test
        point size:3 position:(p3PlanePos) wireColor:red
        point size:3 position:(p3PlanePos + m3Temp.row1) wireColor:green
        point size:3 position:(p3PlanePos + m3Temp.row2) wireColor:green
        point size:3 position:(p3PlanePos + p3PlaneNorm) wireColor:blue

        return #(p3PlanePos, (p3PlanePos + m3Temp.row1), (p3PlanePos + m3Temp.row2))
    )
    else
    (
        throw "Wrong input in function planeFromNormal()"
    )
)

• Enrico