Hi Aren, if I understood right, what you want to do is:
from your object, delete all the faces that have negative X position in
relation to the world?
if so, i believe you are doing a bit more work then necessary. This code
below is working and it will delete faces on the negative X side of the
world
also, normally you don't want to select things with the command line unless
you absolutely need to.
Will over comment it just in case...
##============================
import maya.cmds as cmds
# get the selection of the object - you can do some error checking, if not
polygon or if component selection...
sel = cmds.ls(sl=1)
# get the amount of faces
faceCount = cmds.polyEvaluate(sel[0], face=1)
# array variable to hold negative faces later on
negativeFaces = []
# loop for each face...
for i in range(faceCount):
# check if the X position of that face is negative with xform
command, note that [0] is the X value [1] for y, [2] for z
if cmds.xform(sel[0]+'.f[%d]'%i, q=1, ws=1, t=1)[0] < 0:
# if so add to list
negativeFaces.append(sel[0]+'.f[%d]'%i) # the empty list will hold
all the faces in the negative X side after the loop is done
# delete all faces in negative side
cmds.delete(negativeFaces)
# clean the history
cmds.delete(sel[0], ch=1)
##=====================================================
hope this helps.
cheers.
On Monday, January 27, 2014 4:13:31 PM UTC-2, Aren Voorhees wrote:
>
> Hey all,
>
> I am trying to create a tool for modeling that will delete all faces that
> are located in negative x (as a modeler, I've always wanted something like
> this). I've got most of it working - I create a list of the faces, then
> loop through them, determining their position using the positions of their
> verts. It's the last line, or few lines where I'm a bit lost. I'm
> appending all faces that come back negative into a list, then trying to
> delete that list. Clearly, I'm doing something wrong there.
>
> If you notice anything else that could be done better, feel free to let me
> know!
>
> If anyone can help out a lost beginner, I'd be extremely thankful!
>
> import maya.cmds as cmds
>
>
> #Define object name
>
> curSel = (cmds.ls (sl=True)[0])
>
>
> numOfFaces = len(cmds.getAttr(curSel + ".f[:]"))
>
> for i in xrange (0,numOfFaces):
>
> cmds.select(curSel + ".f[%d]" %i, add=1)
>
>
> #Create list (array) of faces in current object
>
> faceIndexList = cmds.ls(sl=True,fl=True)
>
>
>
> #Loop through the list of faces from above
>
> for i in faceIndexList:
>
>
>
> #Selects the current face
>
> cmds.select (i)
>
>
>
> #Converts selection to verts (tv == toVerts)
>
> faceToVerts = cmds.polyListComponentConversion (tv=1)
>
> cmds.select (faceToVerts)
>
>
>
> #Stores the selected verts into a variable (fl == Flatten, which
> lists out things individually)
>
> vertIndexList = (cmds.ls (sl=True,fl=True))
>
>
>
> #Creating empty position variables to later store the vectors of the
> verts in
>
> posX = 0
>
> posY = 0
>
> posZ = 0
>
>
>
> #Loops through verts in vertIndexList
>
> for j in vertIndexList:
>
>
>
> cmds.select (j)
>
>
>
> #Sets the total number of selected verts (would be 4 in most
> cases)
>
> totalVertNum = len(vertIndexList)
>
>
>
> #Gets the vector location of each vert
>
> vertPos = cmds.xform(query=True, translation=True)
>
>
>
> #Supposed add the X value of the selected vert to the value from
> the previous itteration (starts at 0)
>
> posX += vertPos[0]
>
> #Supposed add the Y value of the selected vert to the value from
> the previous itteration (starts at 0)
>
> posY += vertPos[1]
>
> #Supposed add the Z value of the selected vert to the value from
> the previous itteration (starts at 0)
>
> posZ += vertPos[2]
>
>
>
> #Finds the center of the face by creating a vector
>
> faceCenter = (posX/totalVertNum), (posY/totalVertNum), (posZ/
> totalVertNum)
>
>
>
> #Creates empty list to store negative faces in
>
> negFaces = []
>
>
>
> #If the faceCenterer variable is negative
>
> if faceCenter[0] < 0:
>
>
>
> #Appending all the negative x faces into negFaces
>
> negFaces.append (i)
>
>
>
> #I thought this would delete all faces that had been appended into
> negFaces, but clearly I thought wrong!
>
> for i in negFaces:
>
> cmds.delete (i)
>
>
>
>
>
>
>
>
>
>
>
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