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#!/usr/bin/env python
#
# Copyright 2013 Pixar
#
# Licensed under the Apache License, Version 2.0 (the "Apache License")
# with the following modification; you may not use this file except in
# compliance with the Apache License and the following modification to it:
# Section 6. Trademarks. is deleted and replaced with:
#
# 6. Trademarks. This License does not grant permission to use the trade
# names, trademarks, service marks, or product names of the Licensor
# and its affiliates, except as required to comply with Section 4(c) of
# the License and to reproduce the content of the NOTICE file.
#
# You may obtain a copy of the Apache License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the Apache License with the above modification is
# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the Apache License for the specific
# language governing permissions and limitations under the Apache License.
#
"""
Example
Description:
Create a Maya Mesh using OpenMaya
in Maya's python editor :
import example_createMesh
reload(example_createMesh)
example_createMesh.readPolyFile('/host/devel/rtc3/trees/dev/amber/bin/pbr2/script')
"""
from maya import OpenMaya as om
from itertools import chain
import maya.cmds as cmds
def getDagPath(nodeName):
"""Get an MDagPath for the associated node name
"""
selList = om.MSelectionList()
selList.add(nodeName)
dagPath = om.MDagPath()
selList.getDagPath(0, dagPath)
return dagPath
def convertToMIntArray(listOfInts):
newMIntArray = om.MIntArray(len(listOfInts))
for i in range(len(listOfInts)):
val = listOfInts[i]
newMIntArray.set(val, i)
return newMIntArray
def convertToMPointArray(listOfVertexTuples):
newMPointArray = om.MPointArray(len(listOfVertexTuples))
for i in range(len(listOfVertexTuples)):
v = listOfVertexTuples[i]
newMPointArray.set(i, v[0], v[1], v[2], 1.0)
return newMPointArray
def createMesh(vertices, polygons, parent=None):
'''Create a mesh with the specified vertices and polygons
'''
# The parameters used in MFnMesh.create() can all be derived from the
# input vertices and polygon lists
numVertices = len(vertices)
numPolygons = len(polygons)
verticesM = convertToMPointArray(vertices)
polygonCounts = [len(i) for i in polygons]
polygonCountsM = convertToMIntArray(polygonCounts)
# Flatten the list of lists
# Reference: http://stackoverflow.com/questions/952914/making-a-flat-list-out-of-list-of-lists-in-python
polygonConnects = list(chain.from_iterable(polygons))
polygonConnectsM = convertToMIntArray(polygonConnects)
# Determine parent
if parent == None:
parentM = om.MObject()
else:
parentM = getDagPath(parent).node()
# Create Mesh
newMesh = om.MFnMesh()
newTransformOrShape = newMesh.create(
numVertices,
numPolygons,
verticesM,
polygonCountsM,
polygonConnectsM,
parentM)
dagpath = om.MDagPath()
om.MDagPath.getAPathTo( newTransformOrShape, dagpath )
# Assign the default shader to the mesh.
cmds.sets(
dagpath.fullPathName(),
edit=True,
forceElement='initialShadingGroup')
return dagpath.partialPathName()
def readPolyFile(path):
polys = ''
try:
with open(path, 'r') as f:
polys = ''
for line in f.readlines():
polys += line.rstrip()
except:
print 'Cannot read '+str(path)
polys = eval(polys)
tx = 0.0
ty = 0.0
for poly in polys:
verts = poly['verts']
faces = poly['faces']
parent = None
dagpath = createMesh(verts, faces, parent)
cmds.move( tx, ty, 0, dagpath, absolute=True )
tx+=4.0
if tx > 16.0:
tx=0.0
ty+=4.0
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