Re: [Maya-Python] multiprocessing opening up output window GUI
Hi Justin, Thanks a million ! I will try this as soon as I have access to maya again. Its a shame that the .set_executable() function is windows only. As that would have been a great solution. However being able to use the standard interpreter is a great alternative!. I will get back to you asap with the test results. Jan 2013/2/8 Justin Israel justinisr...@gmail.com I am not sure what platform you are running, but on OSX this is even more problematic. It creates orphaned processes that don't close and keep spinning the cpus. The problem, as I understand it, is that the multiprocessing module needs to be able to fork, copy the memory, and start up the same interpreter again. But Maya is using an embedded python interpreter and it thinks it needs to start up Maya in the new processes, which crashes. On windows, the multiprocessing module has the .set_executable() function: http://docs.python.org/2/library/multiprocessing.html#multiprocessing.set_executable But I don't have windows to test trying to set this to a valid python interpreter, and it is not even platform independent as a solution. What I have gotten to work just fine is the workflow of running your script in a subprocess, and communicating the results back over the pipe. This allows multiprocessing to run under whatever standard python interpreter you want, and is independent of Maya. There are two files here: https://gist.github.com/justinfx/4741527 The first one is a modified version of your original code. The second is the snippet to launch the subprocess from Maya and read the results. -- justin On Feb 8, 2013, at 6:04 AM, Jan: wrote: Hi, i'm trying to use the python multiprocessing module to make my script multi-threaded. However every time it tries to start a new process it loads up the output window with command line on how to load the maya batch process. When I close the window the process closes as well and the function is never called or it locks up. Unfortunately I have no idea how I can pass command line info from the multiprocessing function. So my question is: How can I load a multiprocessing process without having the output window pop up and the process running properly. Any help would be much appreciated. (I was thinking of running my code inside of a different interpreter but I have no idea on how to go at it) Example function: (it works fine in any other standard python (2.6) interpreter ). from multiprocessing import Pool from time import time ## Simple func to eat up cpu power. def whileFunc(z): while z 100: z += 1 return z ## We have to work in __main__ else in some os versions the threads become unsafe if __name__ == __main__: ## Get current time currtime = time() ## How often to run (just a test value) N = 1000 ## Just a list with 1s myList = [1]*N nrOfProcessors = 8 #16 ## Set our pool of processors po = Pool(nrOfProcessors) ## create the threads res = po.map_async(whileFunc, myList) print 'This value below should be a 1000:' ## The res.get() getting of the result actually starts the threads (surprisingly enough.) ## This is also where maya will open up the Output Window and in some cases lock up. print len(res.get()) print 'time elapsed:', time() - currtime -- You received this message because you are subscribed to the Google Groups Python Programming for Autodesk Maya group. To unsubscribe from this group and stop receiving emails from it, send an email to python_inside_maya+unsubscr...@googlegroups.com. To post to this group, send email to python_inside_maya@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the Google Groups Python Programming for Autodesk Maya group. To unsubscribe from this group and stop receiving emails from it, send an email to python_inside_maya+unsubscr...@googlegroups.com. To post to this group, send email to python_inside_maya@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the Google Groups Python Programming for Autodesk Maya group. To unsubscribe from this group and stop receiving emails from it, send an email to python_inside_maya+unsubscr...@googlegroups.com. To post to this group, send email to python_inside_maya@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
[Maya-Python] Re: components in the selected order
On Thursday, July 30, 2009 3:34:59 PM UTC-5, wilsimar wrote: thanks.. I think the scriptjob is the easy way. do you think you can post your code. I'm looking to do the same thing, get a list of selected edges in the order they are selected. I'm not sure I understand how to put the script together using scriptJob. Thanks, Bradon -- You received this message because you are subscribed to the Google Groups Python Programming for Autodesk Maya group. To unsubscribe from this group and stop receiving emails from it, send an email to python_inside_maya+unsubscr...@googlegroups.com. To post to this group, send email to python_inside_maya@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
[Maya-Python] Folding polygons
I'm trying to develop a script for oragami. I have a few method in the works. It's a pretty difficult problem. I'm not sure if anyone else has tacked the problem or knows some steps that might help. this is my reference for basic functionality: https://vimeo.com/36969599 This is pretty good functionality. It really only works well on quads though and with right angle faces. If you try to do this on a sphere it has some problems due to the irregular polygons. for Maya I was thinking of using Joints. I have a script to extract Faces and Query the worldspace transforms this should work for orienting joint chain. The one major problem I am having is finding a way to Query the fold path. to choose the edge where the fold will happen. Finding the center of the face to fold is easy, but finding the connected edges or edges along a path I'm coming up stumped. I think it comes down to tell how to automatically detect a shared edge between tow poly objects. any clues how I might do that? -- You received this message because you are subscribed to the Google Groups Python Programming for Autodesk Maya group. To unsubscribe from this group and stop receiving emails from it, send an email to python_inside_maya+unsubscr...@googlegroups.com. To post to this group, send email to python_inside_maya@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. attachment: OragamiJoints.PNG
[Maya-Python] Re: Finding the angle of a selected face
this code might be useful example for you.
Im working on a similar thing. I want to re-orient a polygon if extracted from
a mesh based on the angle of the face. Or if you have some model that has lost
its transforms because of a lattice or vertex deformation.
I think if you only use the face normal you might get a twisting problem.
In this case I use 3 points in space to define the angle of the plane. The
points are selected somewhat arbitrary for now. I could't really think of a
good way to define the three points. You could probably do a vertex selection
order, but unfortunately I don't think you can get the selected order of
components very easily.
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#===
# Convert To Worldspace Transforms
# author: Bradon Webb
# bra...@paraportable.net
# 01/08/13
#
# This script will calculate world space rotation and transformation to an polygon object
# that has lost its transformation and rotation.
# Based on a the zero index polygon face and vertex 0, 1, 2
# 0 = origin
# 1 = X axis
# 2 = Up axis
#
# Select your object or polygon, then run script.
#
#===
import maya.cmds as mc
import math
import maya.OpenMaya as om
import maya.mel as mel
import pymel.core as pm
def createLineVector(point1 = om.MVector(0,0,0), point2 = om.MVector(1,1,0), name='vector'):
'''
@summary:
given two point MVectors create a line - good for visualizing normals
@arguments:
Point1 = MVector
point2 = MVector
name = string, names the created line
@returns:
curve name
'''
newCurve = mc.curve(name=name, worldSpace=True, degree=1,
point=[(point1.x, point1.y, point1.z),
(point2.x, point2.y, point2.z)])
return newCurve
def calculateFaceCenter(nodeName='nodeName', faceNum=0):
'''
@summary:
gets the worldspace center given a nodeName and a face
centerpoint is based on average weigting or the same as the blue dot on the face
libraries pymel, openMaya
@arguments:
nodeName = string of a node name
faceNum = Int face number
@returns:
worldspace XYZ coordinates of the face as a [list], [x,y,z]
'''
# format node name with face num, store as pymel face
face = pm.MeshFace('{node}.f[{num}]'.format(node=nodeName, num=faceNum))
# get centerpoint of face
pt = face.__apimfn__().center(om.MSpace.kWorld)
centerPoint = pm.datatypes.Point(pt)
print 'CENTERPOINT: ', centerPoint
return centerPoint
def calculateRotations(pointOrigin=0, pointX=1, pointUP=2, nodeName='nodeName'):
'''
@summary:
calculates Euler rotation values from a node and 3 points
@arguments:
pointOrigin = number of the point for the origin
pointX = number of the point for the X axis
pointUP = number of the point for the Y Axis
nodeName = the name of the geo to query the points from
@returns:
Euler rotation to UNnrotate the object, Euler rotation to rotate the object back
[[x,y,z],[x,y,z]]
'''
node = nodeName
rotOrder = mc.getAttr('%s.rotateOrder'%node)
print 'ROTORDER:', rotOrder
# Get Point Positions
originPosition = om.MVector(*mc.pointPosition('{mesh}.vtx[{vertex}]'.format(mesh=node, vertex=pointOrigin), world=True))
XDirection = om.MVector(*mc.pointPosition('{mesh}.vtx[{vertex}]'.format(mesh=node, vertex=pointX), world=True))
UPDirection = om.MVector(*mc.pointPosition('{mesh}.vtx[{vertex}]'.format(mesh=node, vertex=pointUP), world=True))
worldOrigin = om.MVector(0,0,0)
# Subtract Positions for Vector
UpVector = originPosition - UPDirection
XAxis = XDirection - originPosition
ZAxis = UpVector^XAxis
YAxis = ZAxis^XAxis
# Debugging
#print 'XAxis:', XAxis.x, XAxis.y, XAxis.z
#print 'UpVector:', UpVector.x, UpVector.y, UpVector.z
#print 'ZAxis:', ZAxis.x, ZAxis.y, ZAxis.z
#print 'YAxis:', YAxis.x, YAxis.y, YAxis.z
XAxisNormalize = XAxis.normal()
YAxisNormalize = YAxis.normal()
ZAxisNormalize = ZAxis.normal()
# Create lines in space for each axis: visual aid
#xNormalCurve = createLineVector(point1=worldOrigin, point2=XAxisNormalize, name='XAxisNormalize')
#yNormalCurve = createLineVector(point1=worldOrigin, point2=YAxisNormalize, name='YAxisNormalize')
#zNormalCurve =
[Maya-Python] Re: Folding polygons
I think the best way to write this script is to select the fold edges on the mesh. I can query the centerpoint of the edge for joint position. but how would I get the angle of rotation based of that selected edge? here is a math diagram showing a basic setup. I think it is ok to only select one edge and then have maya automatically determine the direction of joint orientation based on the other vertex/edge in the polygon? but this is asking a lot but would make it more user friendly because then I only have to select one edge for each joint. I'm guessing the best way to do this in maya would be to find the end points of selected line (the vertex) and then calculate the X and Z rotation axis. Then the Y axis would be the opposite polygon edge. I need help figuring out how to get the vertex information from an edge selection list. and how to find the opposite polygon edge. -- You received this message because you are subscribed to the Google Groups Python Programming for Autodesk Maya group. To unsubscribe from this group and stop receiving emails from it, send an email to python_inside_maya+unsubscr...@googlegroups.com. To post to this group, send email to python_inside_maya@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. attachment: intersectingLines.PNG
