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Forum topic · General Scripting

XForm Center Position

By barigazy · 2013-01-18

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Description

Question is how can i move xform center at the corners of xform gizmo object (bounding box) but to no affect gizmo position (gizmo need to stay in place)
I've start with this example 


 obj = Sphere()
 xmod = XForm()
 addModifier obj xmod
 fn moveModyCenter mody pos = 
 (
 	mody.gizmo.pos = mody.center = [0,0,0]
 	mody.center = -((mody.gizmo.pos) += pos)
 )
 moveModyCenter xmod (getModContextBBoxMin obj xmod)

Works in some cases.
I'm almost finished the script but now i have a problem when change position and orientation of modifier gizmo. Then the center goes outside gizmo and markers also
This is my last try

obj = Sphere radius:30 segs:4 smooth:off pos:[20,-20,50] dir:[.5,.8,.4] xray:on
xmod = xform name:"XFormResize"
xmod[2][3].track = ScaleXYZ ()
addModifier obj xmod
xholder = attributes "XFR"
(
local obj, mody, ratios = #(1.0, 1.0, 1.0, 1.0, 1.0, 1.0)
fn getMody = (custAttributes.getOwner this)
fn getNode = (refs.dependentnodes (getMody()))
fn getSize o m = ((getModContextBBoxMax o m) - (getModContextBBoxMin o m))
fn moveModyCenter mody pos =
(
mody.gizmo.pos = mody.center = [0,0,0]
mody.center = -((mody.gizmo.pos) += pos)
)
fn setScaleVal o m val spnSize: spnScale: rat: unif: axis: =
(
local size = case axis of (
(1): (getSize o m).x
(2): (getSize o m).y
(3): (getSize o m).z
)
if unif then
(
spnSize[1].value = abs(size * val/100)
spnSize[2].value = spnSize[1].value/rat[1]
spnSize[3].value = spnSize[1].value/rat[2]
spnScale[1].value = val/rat[1]
spnScale[2].value = val/rat[2]
)
else (spnSize[1].value = abs(size * val/100))
)
fn setSizeVal o m val spnScale: spnSize: rat: unif: axis: =
(
local size = case axis of (
(1): (getSize o m).x
(2): (getSize o m).y
(3): (getSize o m).z
)
if unif then
(
spnScale[1].value = (val / size) * 100
spnScale[2].value = spnScale[1].value/rat[1]
spnScale[3].value = spnScale[1].value/rat[2]
spnSize[1].value = val/rat[1]
spnSize[2].value = val/rat[2]
)
else (spnScale[1].value = (val / size) * 100)
)
fn collectBBPoints o m idx: =
(
local minVal = (getModContextBBoxMin o m)*m.gizmo.scale
local maxVal = (getModContextBBoxMax o m)*m.gizmo.scale
local BBPoints = #(
[minVal.x, minVal.y, maxVal.z], [(maxVal.x+minVal.x)/2, minVal.y, maxVal.z], [maxVal.x, minVal.y, maxVal.z], \
[minVal.x, minVal.y, (maxVal.z+minVal.z)/2], [(maxVal.x+minVal.x)/2, minVal.y, (maxVal.z+minVal.z)/2], \
[maxVal.x, minVal.y, (maxVal.z+minVal.z)/2], [minVal.x, minVal.y, minVal.z], [(maxVal.x+minVal.x)/2, minVal.y, minVal.z], \
[maxVal.x, minVal.y, minVal.z], [minVal.x, (maxVal.y+minVal.y)/2, maxVal.z], [(maxVal.x+minVal.x)/2, (maxVal.y+minVal.y)/2, maxVal.z], \
[maxVal.x, (maxVal.y+minVal.y)/2, maxVal.z], [minVal.x, (maxVal.y+minVal.y)/2, (maxVal.z+minVal.z)/2], \
[(maxVal.x+minVal.x)/2, (maxVal.y+minVal.y)/2, (maxVal.z+minVal.z)/2], [maxVal.x, (maxVal.y+minVal.y)/2, (maxVal.z+minVal.z)/2], \
[minVal.x, (maxVal.y+minVal.y)/2, minVal.z], [(maxVal.x+minVal.x)/2, (maxVal.y+minVal.y)/2, minVal.z], [maxVal.x, (maxVal.y+minVal.y)/2, minVal.z], \
[minVal.x, maxVal.y, maxVal.z], [(maxVal.x+minVal.x)/2, maxVal.y, maxVal.z], [maxVal.x, maxVal.y, maxVal.z], \
[minVal.x, maxVal.y, (maxVal.z+minVal.z)/2], [(maxVal.x+minVal.x)/2, maxVal.y, (maxVal.z+minVal.z)/2], [maxVal.x, maxVal.y, (maxVal.z+minVal.z)/2], \
[minVal.x, maxVal.y, minVal.z], [(maxVal.x+minVal.x)/2, maxVal.y, minVal.z], [maxVal.x, maxVal.y, minVal.z]
)
if idx == #all then BBPoints else BBPoints[idx]
)
fn showPointsInView =
(
local m = getMody()
local o = (getNode())[1]
local pntCoords = collectBBPoints o m idx:#all
for i = 1 to pntCoords.count do
(
markPos = pntCoords[i]*o.transform
--txt = i as string
--txtPos = markPos+[0.5,0.5,0]
gw.Marker markPos #smallCircle color:(green)
gw.Text (markPos+[0.5,0.5,0]) (i as string) color:[150, 255, 10]
gw.enlargeUpdateRect #whole
gw.updateScreen()
)
)

parameters main rollout:params (
--sizeVals type:#floatTab tabSize:3 tabSizeVariable:true
--scaleVals type:#floatTab tabSize:3 tabSizeVariable:true
sizeX type:#worldUnits animatable:true ui:sizeX
sizeY type:#worldUnits animatable:true ui:sizeY
sizeZ type:#worldUnits animatable:true ui:sizeZ
scaleX type:#float animatable:true ui:scaleX
scaleY type:#float animatable:true ui:scaleY
scaleZ type:#float animatable:true ui:scaleZ
uniform type:#boolean ui:uniformS default:off

on uniform set val do
(
if val do
(
ratios = #(scaleX/scaleY, scaleX/scaleZ, scaleY/scaleX, scaleY/scaleZ, scaleZ/scaleX, scaleZ/scaleY)
format "%\n" ratios
)
)
)
rollout params "Parameters"
(
label lbl1 " Gizmo Settings" pos:[2,5] style_sunkenedge:true width:157 height:18
label lbl2 " Size: Scale:" pos:[3,25]
spinner sizeX "X: " fieldwidth:65 range:[0.01,1e9,1] pos:[2,40] type:#worldUnits
spinner scaleX "" fieldwidth:58 range:[-1e5,1e5,100] pos:[90,40] controller:((getMody())[2][3][1].track)
spinner sizeY "Y: " fieldwidth:65 range:[0.01,1e9,100] pos:[2,60] type:#worldUnits
spinner scaleY "" fieldwidth:58 range:[-1e5,1e5,100] pos:[90,60] controller:((getMody())[2][3][2].track)
spinner sizeZ "Z: " fieldwidth:65 range:[0.01,1e9,1] pos:[2,80] type:#worldUnits
spinner scaleZ "" fieldwidth:58 range:[-1e5,1e5,100] pos:[90,80] controller:((getMody())[2][3][3].track)
checkbox uniformS "Uniform Scale" pos:[2,100]
button resetS "reset all" width:67 height:18 pos:[93,98]
label lbl3 " Center Settings" pos:[2,120] style_sunkenedge:true width:157 height:18
label lbl5 "BBox Points: Show In Viewport:" pos:[3,140]
dropdownlist pntList "" width:68 pos:[2,156] items:(for i = 1 to 27 collect "point_"+i as string)
checkbutton showHide "Show" width:88 height:20 pos:[72,156]

on params open do
(
obj = (getNode())[1] ; mody = getMody()
if mody.name != "XFormResize" do mody.name = "XFormResize"
local size = getSize obj mody
scaleX.value = mody[2][3][1].track.value
scaleY.value = mody[2][3][2].track.value
scaleZ.value = mody[2][3][3].track.value
sizeX.value = abs(size.x * scaleX.value/100)
sizeY.value = abs(size.y * scaleY.value/100)
sizeZ.value = abs(size.z * scaleZ.value/100)
)
on params close do
(
unRegisterRedrawViewsCallback showPointsInView
max views redraw
)
on resetS pressed do
(
local size = getSize obj mody
scaleX.value = scaleY.value = scaleZ.value = 100
sizeX.value = abs(size.x * scaleX.value/100)
sizeY.value = abs(size.y * scaleY.value/100)
sizeZ.value = abs(size.z * scaleZ.value/100)
ratios = #(1.0, 1.0, 1.0, 1.0, 1.0, 1.0)
)
on showHide changed state do
(
if state == on then
(
showHide.text = "Hide"
unRegisterRedrawViewsCallback showPointsInView
registerRedrawViewsCallback showPointsInView
max views redraw
)
else
(
showHide.text = "Show"
unRegisterRedrawViewsCallback showPointsInView
max views redraw
)
)
on pntList selected itm do
(
local pos = collectBBPoints obj mody idx:itm
with redraw off moveModyCenter mody (pos*obj.transform)
)

on sizeX changed val do (setSizeVal obj mody val spnScale:#(scaleX,scaleY,scaleZ) spnSize:#(sizeY,sizeZ) rat:#(ratios[1],ratios[2]) unif:uniform axis:1)
on sizeY changed val do (setSizeVal obj mody val spnScale:#(scaleY,scaleX,scaleZ) spnSize:#(sizeX,sizeZ) rat:#(ratios[3],ratios[4]) unif:uniform axis:2)
on sizeZ changed val do (setSizeVal obj mody val spnScale:#(scaleZ,scaleX,scaleY) spnSize:#(sizeX,sizeY) rat:#(ratios[5],ratios[6]) unif:uniform axis:3)

on scaleX changed val do (setScaleVal obj mody val spnSize:#(sizeX,sizeY,sizeZ) spnScale:#(scaleY,scaleZ) rat:#(ratios[1],ratios[2]) unif:uniform axis:1)
on scaleY changed val do (setScaleVal obj mody val spnSize:#(sizeY,sizeX,sizeZ) spnScale:#(scaleX,scaleZ) rat:#(ratios[3],ratios[4]) unif:uniform axis:2)
on scaleZ changed val do (setScaleVal obj mody val spnSize:#(sizeZ,sizeX,sizeY) spnScale:#(scaleX,scaleY) rat:#(ratios[5],ratios[6]) unif:uniform axis:3)
)
)
custattributes.add xmod xholder #unique
clearListener()

Comments (2)

am not so good in matrices...

Anubis · 2013-01-18

but is it was something like this? 

fn moveModyCenter obj mody pos =
(
	local objTM = obj.objectTransform
	local modTM = getModContextTM obj mody
	mody.center = pos * modTM * (inverse objTM)
)

moveModyCenter obj mody obj.min

the "!REG3XP1!>" is not a part of the code, its a forum addition that I see many times.

:)

barigazy · 2013-01-18

I look at your Dimension simpleMod but as you know simpleMod is not perfect solution for rescalig. I try also with plugin modifier (extended Xform) but i can't acess manualy to gizmo and center ("+" sign in modifier panel is disappeared). I'm not good at writing scripted plugins and CA, but at least i try :)