Hi Irshad, thank you for the reply. Yup, I can use render to texture and use that as a guide, but the problem is the changes I make to the model will not get updated, and I need real-time feedback when an edge is removed or added. I found this maxscript in scriptspot.com but it will not work in max 2021, which I am currently using. This script works without any problem in 2015 and 2017 and is very useful + it has real-time feedback when you click the Update button. Here is the script (Credit to PolyTools3D), screen shot attached. You can copy+paste it into max script window and run it to test:
macroScript Macro2
category:"DragAndDrop"
toolTip:""
(
(
unRegisterRedrawViewsCallback cbDrawOpenEdges
global RO_DISPLAY_UV_OE
global cbDrawOpenEdges
global cbSelectionChanged
local vertexPos = #()
local uvChannel = 1
local edgesColor = [0,255,0]
local edgeOffset = 0.03
local forceRedraw = false
fn cbDrawOpenEdges = (
gw.setTransform (Matrix3 1)
gw.setColor #line edgesColor
for j in vertexPos do gw.polyLine j true
-- Needed in some Max versions or used dirvers
if forceRedraw do (
gw.enlargeUpdateRect #whole
gw.updateScreen()
)
)
fn cbSelectionChanged mForce:false = (
unRegisterRedrawViewsCallback cbDrawOpenEdges
if ($ != undefined) do (
setwaitcursor()
st = timeStamp()
obj = snapshotasmesh selection[1]
allChannels = for j = 1 to meshop.getNumMaps obj where (meshop.getMapSupport obj j) collect j
RO_DISPLAY_UV_OE.ddl_channel.items = for j in allChannels collect j as string
if (mForce == false) do (
uvChannel = allChannels[1]
RO_DISPLAY_UV_OE.ddl_channel.selection = 1
)
numTFaces = meshop.getNumMapFaces obj uvChannel
numTVerts = meshop.getNumMapVerts obj uvChannel
facesTVertsIdx = for j = 1 to numTFaces collect (meshop.getMapFace obj uvChannel j)
emesh = trimesh()
setMesh emesh numverts:numTVerts numfaces:numTFaces
setMesh emesh faces:facesTVertsIdx
objOpenEdges = meshop.getOpenEdges obj
meshOpenEdges = (meshop.getOpenEdges emesh) - objOpenEdges
vertexPos = #()
sharedFaces = meshop.getFacesUsingEdge emesh meshOpenEdges
foundEdges = #()
for j in sharedFaces do (
objFaceVerts = getFace obj j
edge1 = j*3 - 2
edge2 = j*3 - 1
edge3 = j*3
n1 = (getFaceNormal obj j) * edgeOffset
if (finditem meshOpenEdges edge1) > 0 do (
v1Idx = objFaceVerts.x
v2Idx = objFaceVerts.y
if (findItem foundEdges [v1Idx, v2Idx] == 0) do (
v1 = getVert obj v1Idx
v2 = getVert obj v2Idx
n3 = (normalize (cross n1 (v1-v2))) * edgeOffset
append vertexPos #(v1+n1+n3, v2+n1+n3, v1-n1-n3, v2-n1-n3, v1-n1+n3, v2-n1+n3, v1+n1-n3, v2+n1-n3)
append foundEdges [v2Idx, v1Idx]
)
)
if (finditem meshOpenEdges edge2) > 0 do (
v1Idx = objFaceVerts.y
v2Idx = objFaceVerts.z
if (findItem foundEdges [v1Idx, v2Idx] == 0) do (
v1 = getVert obj v1Idx
v2 = getVert obj v2Idx
n3 = (normalize (cross n1 (v1-v2))) * edgeOffset
append vertexPos #(v1+n1+n3, v2+n1+n3, v1-n1-n3, v2-n1-n3, v1-n1+n3, v2-n1+n3, v1+n1-n3, v2+n1-n3)
append foundEdges [v2Idx, v1Idx]
)
)
if (finditem meshOpenEdges edge3) > 0 do (
v1Idx = objFaceVerts.z
v2Idx = objFaceVerts.x
if (findItem foundEdges [v1Idx, v2Idx] == 0) do (
v1 = getVert obj v1Idx
v2 = getVert obj v2Idx
n3 = (normalize (cross n1 (v1-v2))) * edgeOffset
append vertexPos #(v1+n1+n3, v2+n1+n3, v1-n1-n3, v2-n1-n3, v1-n1+n3, v2-n1+n3, v1+n1-n3, v2+n1-n3)
append foundEdges [v2Idx, v1Idx]
)
)
)
sharedFaces = meshop.getFacesUsingEdge obj objOpenEdges
for j in sharedFaces do (
objFaceVerts = getFace obj j
edge1 = j*3 - 2
edge2 = j*3 - 1
edge3 = j*3
n1 = (getFaceNormal obj j) * edgeOffset
if (finditem objOpenEdges edge1) > 0 do (
v1Idx = objFaceVerts.x
v2Idx = objFaceVerts.y
v1 = getVert obj v1Idx
v2 = getVert obj v2Idx
n3 = (normalize (cross n1 (v1-v2))) * edgeOffset
append vertexPos #(v1+n1+n3, v2+n1+n3, v1-n1-n3, v2-n1-n3, v1-n1+n3, v2-n1+n3, v1+n1-n3, v2+n1-n3)
)
if (finditem objOpenEdges edge2) > 0 do (
v1Idx = objFaceVerts.y
v2Idx = objFaceVerts.z
v1 = getVert obj v1Idx
v2 = getVert obj v2Idx
n3 = (normalize (cross n1 (v1-v2))) * edgeOffset
append vertexPos #(v1+n1+n3, v2+n1+n3, v1-n1-n3, v2-n1-n3, v1-n1+n3, v2-n1+n3, v1+n1-n3, v2+n1-n3)
)
if (finditem objOpenEdges edge3) > 0 do (
v1Idx = objFaceVerts.z
v2Idx = objFaceVerts.x
v1 = getVert obj v1Idx
v2 = getVert obj v2Idx
n3 = (normalize (cross n1 (v1-v2))) * edgeOffset
append vertexPos #(v1+n1+n3, v2+n1+n3, v1-n1-n3, v2-n1-n3, v1-n1+n3, v2-n1+n3, v1+n1-n3, v2+n1-n3)
)
)
format "Found %\tUV Open Edges in %s\n" vertexPos.count ((timeStamp() - st) / 1000.0)
registerRedrawViewsCallback cbDrawOpenEdges
delete obj
delete emesh
gc light:true
setArrowCursor()
)
forceCompleteRedraw()
)
try(destroyDialog RO_DISPLAY_UV_OE) catch()
rollout RO_DISPLAY_UV_OE "UV Open Edges" width:160 height:198
(
checkbutton bt_enable "Display UV Open Edges" pos:[8,8] width:144 height:32
dropdownList ddl_channel "UV Channel:" pos:[8,72] width:120 height:40 enabled:false
colorPicker cp1 "" pos:[131,90] width:21 height:21 enabled:true color:edgesColor modal:false
checkbox chk_redraw "Force Redraw" pos:[8,46] width:100 height:16 enabled:false
spinner spn_width "Edge Width:" pos:[8,120] width:120 height:16 range:[1,100,4] type:#integer fieldwidth:50
button bt_update "Update" pos:[8,160] width:144 height:28 enabled:false
fn destroy = (
callbacks.removeScripts #selectionSetChanged
unRegisterRedrawViewsCallback cbDrawOpenEdges
forceCompleteRedraw()
)
on RO_DISPLAY_UV_OE close do destroy()
on bt_enable changed arg do
(
bt_update.enabled = arg
ddl_channel.enabled = arg
chk_redraw.enabled = arg
destroy()
if (arg == true) do (
callbacks.addscript #selectionSetChanged "cbSelectionChanged()"
cbSelectionChanged()
)
)
on bt_update pressed do cbSelectionChanged()
on ddl_channel selected arg do (
uvChannel = (ddl_channel.selected as integer)
cbSelectionChanged mForce:true
)
on cp1 changed arg do edgesColor = arg
on spn_width changed arg do edgeOffset = (arg-1)/100.0
on chk_redraw changed arg do forceRedraw = arg
)
createDialog RO_DISPLAY_UV_OE
)
)
