I use a number of scripts for speeding up the creation of collision boxes for Valves SMD exporter in Softimage. The process I follow is laid out below:
First you will need to download this
file. Its called Stanhull. It's a simple program that spits out an obj file containing a convex mesh based on an input mesh (inside an .obj file). Extract and place in a folder of your choice. If you don't want to edit the script below use the path: C:\3d\Stanhull\
1. Create your physbox model components. I do this by breaking up the original model into roughly convex forms. You are limited to the number of these by default (to 16 I think) but you can overide the limit with a line in your .qc file. The
$maxconvexpieces QC command can increase this.
2. Select the new convex model pieces and run the convex script:
'Objdir = the directory you want the exported Obj to go to (change if you wish)
Objdir = "C:\3d\Stanhull\"
'StanhullDir = the directory you have put stanhull.exe in (change if you wish)
StanhullDir = "C:\3d\Stanhull\"
'NOTE: file is always created in the Softimage\version xx\Application\bin dir and always called hull.obj
fileOutLoc = Application.InstallationPath( siFactoryPath ) & "\Application\bin\hull.obj"
set list = GetValue( "SelectionList" )
if list.count = 0 then
MsgBox "Please select at least one polymesh object first!!"
else
for each item in list
logmessage item.name
name = item.name
if item.type = "polymsh" then
'select objects one by one and export
SelectObj name, , True
getObjname = Objdir & "convert.obj"
ObjExport getObjname, , , , , , , , , , 0, False, , , False
'set up s.ystem command to run Stanhull.exe
cmd = StanhullDir & "StanHull " & getObjname & " -t"
cmdResult = s.ystem( cmd )
set inObj = ObjImport( fileOutLoc, 1, 0, True, True, False, True )
'select new object and set up geometry approximation as needed for .phy SMDs
SelectObj inObj, , True
MakeLocal inObj & ".geomapprox", siDefaultPropagation
SetValue inObj & ".geomapprox.gapproxmoad", False
CreateProjection , siTxtCubic, siTxtDefaultCubic, , "Texture_Projection"
FreezeModeling
end if
next
end if
3. Now with the new convex imported back in, select them and remove automatic discontinuity from them all with the following script:
dim name
set list = GetValue( "SelectionList" )
if list.count = 0 then
MsgBox "Please select at least one polymesh object first!!"
else
'start rendermap make routine - depending on scene size and object complexity this could take a while... :)
for each item in list
logmessage item.name
name = item.name
if item.type = "polymsh" then
SelectObj name, , True
MakeLocal ".geomapprox", siDefaultPropagation
SetValue ".geomapprox.gapproxmoad", False
end if
next
end if
4. Lastly, I apply cubic UVs to all of the physics box objects by selecting them and running this script (below). Once frozen, they are ready for exporting as SMD files for compiling.
dim name
set list = GetValue( "SelectionList" )
if list.count = 0 then
MsgBox "Please select at least one polymesh object first!!"
else
'start rendermap make routine - depending on scene size and object complexity this could take a while... :)
for each item in list
logmessage item.name
name = item.name
if item.type = "polymsh" then
SelectObj name, , True
CreateProjection , siTxtCubic, siTxtDefaultCubic, , "Texture_Projection"
end if
next
end if
freeze ALL. (You may need to add an image to the material).
