JurassicParkTrespasser/jp2_pc/Tools/MAXScript/Pointer.ms
2018-01-01 23:07:24 +01:00

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-- A function which takes a vwector and returns a valid
-- rotation with it's y axis pointing down the vector.
fn y_point dir =
(
y = normalize dir
if (y.z == 0)then
if (y.y == 0)then
return "bogus";
-- z = [0,0,1]
x = [1,0,0]
-- z = y * (rotateXMatrix 90)
-- z = y * (rotateYMatrix 90)
z = normalize (cross x y)
x = - normalize (cross z y)
m = matrix3 x y z [0,0,0]
inverse m
)
fn point_obj obj dir =
(
local pos = obj.position
obj.position = [0,0,0]
ret = y_point dir
if (ret == "bogus") do
(
obj.position = pos
return "BOGUS"
)
obj.rotation = ret as quat
obj.position = pos
-- make sure that Z points up
-- if ForceZup.checked do
if obj.dir.z < 0.0 do in coordsys local rotate obj 180 y_axis
)
fn Repoint source target =
(
-- Forces source to point to target with its Y axis.
local v3_to
if (target == source) then return "Target == Source"
if (target == undefined) then return "target undefined"
if (source == undefined) then return "source undefined"
v3_to = target.position - source.position
if (v3_to == undefined) then
exit
point_obj source v3_to
)
fn CenteredRepoint source target =
(
if (target == undefined) then return "target undefined"
if (source == undefined) then return "source undefined"
source.pivot = source.center
target.pivot = target.center
Repoint source target
)
utility Pointer "Pointer"
(
pickbutton Activate "Point Selected"
checkbox ForceZup "Force Z axis up"
button flipJoints "Flip Joints"
on Activate picked obj do
(
CenteredRepoint selection[1] obj
select obj
)
on flipJoints pressed do
in coordsys local rotate selection 180 y_axis
)