Like I said, at the very least you want to throw in that filehandle.seek(0)
after you read the first line to determine if it contains a 'v'. At least
after doing that you can be sure you will be parsing the whole file.
for char in fileHandle.readline()[0]:
if char.startswith("v"):
fileHandle.seek(0)
self.processLine()
I will just cover my eyes and pretend I don't see the part of the code
where it does a for-loop over a single character, or the shadowing of
python builtins ;-)
On Wed, Sep 24, 2014 at 2:50 PM, likage <[email protected]> wrote:
> I am curious, if it is possible for me to simply modify the current code I
> have, rather than dumping in a whole new bunch of codes? No offence here
> (just getting frustrated with this code of mine), just thought that if the
> initial coding is somewhat working, except that I will need to modify the
> style, then why not..
>
>
>
> On Saturday, September 20, 2014 5:04:30 AM UTC+8, Justin Israel wrote:
>>
>> Here is a really quick generic example of parsing that file format:
>> https://gist.github.com/justinfx/c49c4bd4acd872a8ad57
>>
>> I didn't use any Maya-specific concepts here because those are easily
>> filled in. The focus of this example was to highlight reading from a file
>> handle, and using seek() to make sure you reset the offset after you have
>> consume some data to validate it. I also broke out the processing of each
>> line into handlers, which makes it pretty easy to read and extend to
>> support more line types.
>>
>> Maybe this helps a bit and you could apply some of this to your
>> Maya-specific code?
>>
>> -- justin
>>
>>
>>
>> On Sat, Sep 20, 2014 at 2:38 AM, damon shelton <[email protected]>
>> wrote:
>>
>>> In your logic you should readline ().strip () then split the line by
>>> white space and if splits [0] is 'v' then use splits[1] splits[2]
>>> splits[3] as X y z coordinates
>>>
>>> On a note. Obj format usually just dumps groups of types together
>>>
>>> All v together all vs together all f together mainly because most
>>> sections refer to other sections by Id
>>> On Sep 19, 2014 12:55 AM, "Justin Israel" <[email protected]> wrote:
>>>
>>>> For now, just call self.fileHandle.seek(0) at the start of your
>>>> processLine function.
>>>> On 19/09/2014 7:43 PM, "likage" <[email protected]> wrote:
>>>>
>>>>> hmm.. okay, bummer for me.
>>>>>
>>>>> I thought if in my processLine function, having it to read through all
>>>>> the lines in the self.fileHandle would be a different case scenario...
>>>>> Now I am totally lost...
>>>>>
>>>>>
>>>>> On Friday, September 19, 2014 3:35:43 PM UTC+8, Justin Israel wrote:
>>>>>>
>>>>>> To be honest, that rewrite is doing a lot of strange things.
>>>>>>
>>>>>> You read the first character of the first line and loop over that
>>>>>> single character string to see if it starts with 'v'. At that point you
>>>>>> have burned the first line and won't process it. Then your processLine
>>>>>> function actually loops over the remaining lines. Is readline() doing
>>>>>> what
>>>>>> you think it does? It doesn't always start from the beginning. Every time
>>>>>> you read, you advance the file handle. You would want to just read one
>>>>>> character, and check if it is 'v', and then use seek(0) to move the
>>>>>> offset
>>>>>> back to the start and read all the lines.
>>>>>>
>>>>>> I can't write up an example at the moment, but if you don't figure it
>>>>>> out by the time I get to a computer, I will try and post something.
>>>>>> On 19/09/2014 4:42 PM, "likage" <[email protected]> wrote:
>>>>>>
>>>>>>> I rewrite my code again, will this be any better?
>>>>>>> By the way, I am still getting the part where my UI closes itself if
>>>>>>> it found an invalid file
>>>>>>>
>>>>>>> class ReadObjCloud():
>>>>>>> """ read in vertex data from nuke 3d camera track """
>>>>>>>
>>>>>>> def __init__(self, objPath):
>>>>>>>
>>>>>>> try:
>>>>>>> fileHandle = open(objPath,"r")
>>>>>>> self.fileHandle = fileHandle
>>>>>>> filePath = os.path.basename(fileHandle.name)
>>>>>>> fileName = os.path.splitext(filePath)[0]
>>>>>>>
>>>>>>> for char in fileHandle.readline()[0]:
>>>>>>> if char.startswith("v"):
>>>>>>> self.processLine()
>>>>>>>
>>>>>>> # Selects all the imported locators, grouped
>>>>>>> and transformed it
>>>>>>> cmds.select(camSel[0] + "_locator*")
>>>>>>> objGroup = cmds.group(n=("pointCloud_" +
>>>>>>> fileName))
>>>>>>> cmds.xform(os=True, piv=(0, 0, 0))
>>>>>>> cmds.scale(0.01, 0.01, 0.01)
>>>>>>> cmds.delete(constructionHistory=True)
>>>>>>>
>>>>>>> cmds.select(objGroup, camSel[0], add=True)
>>>>>>> cmds.group(n="cameraTrack")
>>>>>>> cmds.scale(10, 10, 10)
>>>>>>>
>>>>>>> else:
>>>>>>> self.noProcess()
>>>>>>>
>>>>>>> except:
>>>>>>> sys.stderr.write( "Failed to read file information\n")
>>>>>>> raise
>>>>>>>
>>>>>>> def processLine(self):
>>>>>>>
>>>>>>> for line in self.fileHandle:
>>>>>>> brokenString = string.split(line)
>>>>>>>
>>>>>>> # Creation of locators and they are named with the
>>>>>>> prefix of the imported camera
>>>>>>> cmds.spaceLocator(name = camSel[0] + "_locator",
>>>>>>> absolute=True, position=(\
>>>>>>> float(brokenString[1])*100\
>>>>>>> , float(brokenString[2])*100\
>>>>>>> , float(brokenString[3])*100))
>>>>>>> cmds.CenterPivot()
>>>>>>> cmds.scale(0.5, 0.5, 0.5)
>>>>>>>
>>>>>>> self.fileHandle.close()
>>>>>>>
>>>>>>> def noProcess(self):
>>>>>>> print "INVALID - Re-import again!!!"
>>>>>>>
>>>>>>>
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