Creating own .obj exporter for Maya...

[Anonymous]

I am creating my own .obj exporter for maya.

When i'm exporting just one mesh my code works just fine but when exporting several meshes / objects it fails to create the complete meshes.

I'm pretty sure that the problem is when i'm getting the face.getVertices(), face.getUVIndex() and face.normalIndex() and printing them to the file. As i said the first mesh works fine but when it gets to the second mesh the codinates gets all wrong, they connect to the wrong triangles. If anyone has any ideas on how to possibly loop them differently or change the values to the correct ones i would be forever greatful. Help would be very very appreciated!

Here is an example on how a multi object mesh ends out. http://postimg.org/image/rr0fvs0v7/

import pymel.core as pm
import pymel.core.nodetypes as nt


planes = pm.ls(sl=True)

def meshFile():
 
 def myRound(n):
 return round(n, 6)
 
 file = open("C:/Users/Blondiegirls/Desktop/test2.obj", "wb")
 file.write("mtllib test2.mtl\r\n")
 for p in planes[:]:
 #pm.polyTriangulate(planes[0])
 file.write("\r\ng default")
 
 # Printa world kordinater
 for index, point in enumerate(p.vtx):
 temp = index,map(myRound, point.getPosition(space='world'))
 
 file.write("\r\nv ")
 file.write(str(' '.join(map(str, temp[1]))))
 
 # Printa texture kordinater
 mesh = pm.ls(sl=True)[0]
 U,V = mesh.getUVs()
 UVs = zip(U,V)
 for uv in UVs:
 file.write("\r\nvt ")
 file.write(str(uv[0])+" "+str(uv[1]))
 
 #printa normals
 for n in p.getNormals():
 file.write("\r\nvn ")
 file.write(str(n[0])+" "+str(n[1])+" "+str(n[2]))
 
 file.write("\r\ns 1") 
 file.write("\r\ng ")
 file.write(str(p))
 file.write("\r\nusemtl test")
 for faceIndex, face in enumerate(p.faces):
 faceVertices = face.getVertices()
 faceUV0 = face.getUVIndex(0)+1
 faceUV1 = face.getUVIndex(1)+1
 faceUV2 = face.getUVIndex(2)+1
 
 faceNor0 = face.normalIndex(0)+1
 faceNor1 = face.normalIndex(1)+1
 faceNor2 = face.normalIndex(2)+1
 
 
 file.write("\r\nf ")
 faceVertices0 = int(faceVertices[0])+1
 faceVertices1 = int(faceVertices[1])+1
 faceVertices2 = int(faceVertices[2])+1
 temp3 = (str(faceVertices0)) + "/" + (str(faceUV0)) +"/" + (str(faceNor0)) + " " + (str(faceVertices1)) + "/" + (str(faceUV1)) +"/" + (str(faceNor1)) + " " + (str(faceVertices2)) + "/" + (str(faceUV2)) +"/" + (str(faceNor2)) 
 file.write(str(temp3))
 file.close()
 
meshFile() 


def MTLFile():
 file2 = open("C:/Users/Blondiegirls/Desktop/test2.mtl", "wb")
 
 object = cmds.ls(sl=1)[0].split(':')[0]
 #print('object: '+object)
 
 shipTX = pm.PyNode(object)
 shadingGroups = shipTX.shadingGroups()
 sg1 = shadingGroups[0]
 
 material = sg1.listConnections(source=True, destination=False, type=nt.Lambert)[0]
 file = material.color.listConnections(type=nt.File)[0]
 filename = file.fileTextureName.get()
 
 materialColor = material.getColor() #for Kd
 materialAmbient = material.getAmbientColor() #for Ka
 materialSpecular = material.getSpecularColor() #for Ks
 refractiveIndex = material.getRefractiveIndex() #for Ni
 
 file2.write("newmtl "+"test"+"\r\n")
 file2.write("Ka "+str(materialAmbient[0])+" "+str(materialAmbient[1])+" "+str(materialAmbient[2])+"\r\n")
 file2.write("Kd "+str(materialColor[0])+" "+str(materialColor[1])+" "+str(materialColor[2])+"\r\n")
 file2.write("Ks "+str(materialSpecular[0])+" "+str(materialSpecular[1])+" "+str(materialSpecular[2])+"\r\n")
 
 file2.write("d 1.0\r\n")
 file2.write("Illum 2\r\n")
 file2.write("map_Kd "+filename+"\r\n") #for map_Kd
 
 
 
 file2.close()
 
MTLFile()